Adding upstream version 2:9.0.1378.upstream/2%9.0.1378upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 6956 insertions, 0 deletions

diff --git a/src/userfunc.c b/src/userfunc.c
new file mode 100644
index 0000000..9e24b79
--- /dev/null
+++ b/src/userfunc.c
@@ -0,0 +1,6956 @@
+/* vi:set ts=8 sts=4 sw=4 noet:
+ *
+ * VIM - Vi IMproved	by Bram Moolenaar
+ *
+ * Do ":help uganda"  in Vim to read copying and usage conditions.
+ * Do ":help credits" in Vim to see a list of people who contributed.
+ * See README.txt for an overview of the Vim source code.
+ */
+
+/*
+ * userfunc.c: User defined function support
+ */
+
+#include "vim.h"
+
+#if defined(FEAT_EVAL) || defined(PROTO)
+/*
+ * All user-defined functions are found in this hashtable.
+ */
+static hashtab_T	func_hashtab;
+
+// Used by get_func_tv()
+static garray_T funcargs = GA_EMPTY;
+
+// pointer to funccal for currently active function
+static funccall_T *current_funccal = NULL;
+
+// Pointer to list of previously used funccal, still around because some
+// item in it is still being used.
+static funccall_T *previous_funccal = NULL;
+
+static void funccal_unref(funccall_T *fc, ufunc_T *fp, int force);
+static void func_clear(ufunc_T *fp, int force);
+static int func_free(ufunc_T *fp, int force);
+static char_u *untrans_function_name(char_u *name);
+static void handle_defer_one(funccall_T *funccal);
+
+    void
+func_init(void)
+{
+    hash_init(&func_hashtab);
+}
+
+/*
+ * Return the function hash table
+ */
+    hashtab_T *
+func_tbl_get(void)
+{
+    return &func_hashtab;
+}
+
+/*
+ * Get one function argument.
+ * If "argtypes" is not NULL also get the type: "arg: type" (:def function).
+ * If "types_optional" is TRUE a missing type is OK, use "any".
+ * If "evalarg" is not NULL use it to check for an already declared name.
+ * If "eap" is not NULL use it to check for an already declared name.
+ * Return a pointer to after the type.
+ * When something is wrong return "arg".
+ */
+    static char_u *
+one_function_arg(
+	char_u	    *arg,
+	garray_T    *newargs,
+	garray_T    *argtypes,
+	int	    types_optional,
+	evalarg_T   *evalarg,
+	exarg_T	    *eap,
+	int	    is_vararg,
+	int	    skip)
+{
+    char_u	*p = arg;
+    char_u	*arg_copy = NULL;
+    int		is_underscore = FALSE;
+
+    while (ASCII_ISALNUM(*p) || *p == '_')
+	++p;
+    if (arg == p || isdigit(*arg)
+	    || (argtypes == NULL
+		&& ((p - arg == 9 && STRNCMP(arg, "firstline", 9) == 0)
+		    || (p - arg == 8 && STRNCMP(arg, "lastline", 8) == 0))))
+    {
+	if (!skip)
+	    semsg(_(e_illegal_argument_str), arg);
+	return arg;
+    }
+
+    // Vim9 script: cannot use script var name for argument. In function: also
+    // check local vars and arguments.
+    if (!skip && argtypes != NULL && check_defined(arg, p - arg,
+			       evalarg == NULL ? NULL : evalarg->eval_cctx,
+			       eap == NULL ? NULL : eap->cstack, TRUE) == FAIL)
+	return arg;
+
+    if (newargs != NULL && ga_grow(newargs, 1) == FAIL)
+	return arg;
+    if (newargs != NULL)
+    {
+	int	c;
+	int	i;
+
+	c = *p;
+	*p = NUL;
+	arg_copy = vim_strsave(arg);
+	if (arg_copy == NULL)
+	{
+	    *p = c;
+	    return arg;
+	}
+	is_underscore = arg_copy[0] == '_' && arg_copy[1] == NUL;
+	if (argtypes == NULL || !is_underscore)
+	    // Check for duplicate argument name.
+	    for (i = 0; i < newargs->ga_len; ++i)
+		if (STRCMP(((char_u **)(newargs->ga_data))[i], arg_copy) == 0)
+		{
+		    semsg(_(e_duplicate_argument_name_str), arg_copy);
+		    vim_free(arg_copy);
+		    return arg;
+		}
+	((char_u **)(newargs->ga_data))[newargs->ga_len] = arg_copy;
+	newargs->ga_len++;
+
+	*p = c;
+    }
+
+    // get any type from "arg: type"
+    if (argtypes != NULL && (skip || ga_grow(argtypes, 1) == OK))
+    {
+	char_u *type = NULL;
+
+	if (VIM_ISWHITE(*p) && *skipwhite(p) == ':')
+	{
+	    semsg(_(e_no_white_space_allowed_before_colon_str),
+					    arg_copy == NULL ? arg : arg_copy);
+	    p = skipwhite(p);
+	}
+	if (*p == ':')
+	{
+	    ++p;
+	    if (!skip && !VIM_ISWHITE(*p))
+	    {
+		semsg(_(e_white_space_required_after_str_str), ":", p - 1);
+		return arg;
+	    }
+	    type = skipwhite(p);
+	    p = skip_type(type, TRUE);
+	    if (!skip)
+		type = vim_strnsave(type, p - type);
+	}
+	else if (*skipwhite(p) != '=' && !types_optional && !is_underscore)
+	{
+	    semsg(_(e_missing_argument_type_for_str),
+					    arg_copy == NULL ? arg : arg_copy);
+	    return arg;
+	}
+	if (!skip)
+	{
+	    if (type == NULL && types_optional)
+		// lambda arguments default to "any" type
+		type = vim_strsave((char_u *)
+					    (is_vararg ? "list<any>" : "any"));
+	    ((char_u **)argtypes->ga_data)[argtypes->ga_len++] = type;
+	}
+    }
+
+    return p;
+}
+
+/*
+ * Handle line continuation in function arguments or body.
+ * Get a next line, store it in "eap" if appropriate and put the line in
+ * "lines_to_free" to free the line later.
+ */
+    static char_u *
+get_function_line(
+	exarg_T		*eap,
+	garray_T	*lines_to_free,
+	int		indent,
+	getline_opt_T	getline_options)
+{
+    char_u *theline;
+
+    if (eap->getline == NULL)
+	theline = getcmdline(':', 0L, indent, 0);
+    else
+	theline = eap->getline(':', eap->cookie, indent, getline_options);
+    if (theline != NULL)
+    {
+	if (lines_to_free->ga_len > 0
+		&& eap->cmdlinep != NULL
+		&& *eap->cmdlinep == ((char_u **)lines_to_free->ga_data)
+						   [lines_to_free->ga_len - 1])
+	    *eap->cmdlinep = theline;
+	(void)ga_add_string(lines_to_free, theline);
+    }
+
+    return theline;
+}
+
+/*
+ * Get function arguments.
+ * "argp" should point to just after the "(", possibly to white space.
+ * "argp" is advanced just after "endchar".
+ */
+    static int
+get_function_args(
+    char_u	**argp,
+    char_u	endchar,
+    garray_T	*newargs,
+    garray_T	*argtypes,	// NULL unless using :def
+    int		types_optional,	// types optional if "argtypes" is not NULL
+    evalarg_T	*evalarg,	// context or NULL
+    int		*varargs,
+    garray_T	*default_args,
+    int		skip,
+    exarg_T	*eap,		// can be NULL
+    int		in_class,	// non-zero when inside a class or interface
+    garray_T	*newlines,	// function body lines
+    garray_T	*lines_to_free)
+{
+    int		mustend = FALSE;
+    char_u	*arg;
+    char_u	*p;
+    int		c;
+    int		any_default = FALSE;
+    char_u	*whitep = *argp;
+
+    if (newargs != NULL)
+	ga_init2(newargs, sizeof(char_u *), 3);
+    if (argtypes != NULL)
+	ga_init2(argtypes, sizeof(char_u *), 3);
+    if (!skip && default_args != NULL)
+	ga_init2(default_args, sizeof(char_u *), 3);
+
+    if (varargs != NULL)
+	*varargs = FALSE;
+
+    /*
+     * Isolate the arguments: "arg1, arg2, ...)"
+     */
+    arg = skipwhite(*argp);
+    p = arg;
+    while (*p != endchar)
+    {
+	while (eap != NULL && eap->getline != NULL
+			 && (*p == NUL || (VIM_ISWHITE(*whitep) && *p == '#')))
+	{
+	    // End of the line, get the next one.
+	    char_u *theline = get_function_line(eap, lines_to_free, 0,
+							  GETLINE_CONCAT_CONT);
+
+	    if (theline == NULL)
+		break;
+	    whitep = (char_u *)" ";
+	    p = skipwhite(theline);
+	}
+
+	if (mustend && *p != endchar)
+	{
+	    if (!skip)
+		semsg(_(e_invalid_argument_str), *argp);
+	    goto err_ret;
+	}
+	if (*p == endchar)
+	    break;
+
+	if (p[0] == '.' && p[1] == '.' && p[2] == '.')
+	{
+	    if (varargs != NULL)
+		*varargs = TRUE;
+	    p += 3;
+	    mustend = TRUE;
+
+	    if (argtypes != NULL)
+	    {
+		// ...name: list<type>
+		if (!eval_isnamec1(*p))
+		{
+		    if (!skip)
+			emsg(_(e_missing_name_after_dots));
+		    goto err_ret;
+		}
+
+		arg = p;
+		p = one_function_arg(p, newargs, argtypes, types_optional,
+						     evalarg, eap, TRUE, skip);
+		if (p == arg)
+		    break;
+		if (*skipwhite(p) == '=')
+		{
+		    emsg(_(e_cannot_use_default_for_variable_arguments));
+		    break;
+		}
+	    }
+	}
+	else if (in_class && STRNCMP(p, "this.", 5) == 0)
+	{
+	    // this.memberName
+	    p += 5;
+	    arg = p;
+	    while (ASCII_ISALNUM(*p) || *p == '_')
+		++p;
+	    char_u *argend = p;
+
+	    if (*skipwhite(p) == '=')
+	    {
+		char_u *defval = skipwhite(skipwhite(p) + 1);
+		if (STRNCMP(defval, "v:none", 6) != 0)
+		{
+		    semsg(_(e_constructor_default_value_must_be_vnone_str), p);
+		    goto err_ret;
+		}
+		any_default = TRUE;
+		p = defval + 6;
+
+		if (ga_grow(default_args, 1) == FAIL)
+		    goto err_ret;
+
+		char_u *expr = vim_strsave((char_u *)"v:none");
+		if (expr == NULL)
+		    goto err_ret;
+		((char_u **)(default_args->ga_data))
+						 [default_args->ga_len] = expr;
+		default_args->ga_len++;
+	    }
+	    else if (any_default)
+	    {
+		emsg(_(e_non_default_argument_follows_default_argument));
+		goto err_ret;
+	    }
+
+	    // TODO: check the argument is indeed a member
+	    if (newargs != NULL && ga_grow(newargs, 1) == FAIL)
+		return FAIL;
+	    if (newargs != NULL)
+	    {
+		((char_u **)(newargs->ga_data))[newargs->ga_len] =
+					       vim_strnsave(arg, argend - arg);
+		newargs->ga_len++;
+
+		if (argtypes != NULL && ga_grow(argtypes, 1) == OK)
+		{
+		    // TODO: use the actual type
+		    ((char_u **)argtypes->ga_data)[argtypes->ga_len++] =
+						  vim_strsave((char_u *)"any");
+
+		    // Add a line to the function body for the assignment.
+		    if (ga_grow(newlines, 1) == OK)
+		    {
+			// "this.name = name"
+			int len = 5 + (argend - arg) + 3 + (argend - arg) + 1;
+			if (any_default)
+			    len += 14 + 10;
+			char_u *assignment = alloc(len);
+			if (assignment != NULL)
+			{
+			    c = *argend;
+			    *argend = NUL;
+			    if (any_default)
+				vim_snprintf((char *)assignment, len,
+						"ifargisset %d this.%s = %s",
+					   default_args->ga_len - 1, arg, arg);
+			    else
+				vim_snprintf((char *)assignment, len,
+						     "this.%s = %s", arg, arg);
+			    *argend = c;
+			    ((char_u **)(newlines->ga_data))[
+					      newlines->ga_len++] = assignment;
+			}
+		    }
+		}
+	    }
+	    if (*p == ',')
+		++p;
+	}
+	else
+	{
+	    char_u *np;
+
+	    arg = p;
+	    p = one_function_arg(p, newargs, argtypes, types_optional,
+						    evalarg, eap, FALSE, skip);
+	    if (p == arg)
+		break;
+
+	    // Recognize " = expr" but not " == expr".  A lambda can have
+	    // "(a = expr" but "(a == expr" and "(a =~ expr" are not a lambda.
+	    np = skipwhite(p);
+	    if (*np == '=' && np[1] != '=' && np[1] != '~'
+						       && default_args != NULL)
+	    {
+		typval_T	rettv;
+
+		// find the end of the expression (doesn't evaluate it)
+		any_default = TRUE;
+		p = skipwhite(np + 1);
+		char_u *expr = p;
+		if (eval1(&p, &rettv, NULL) != FAIL)
+		{
+		    if (!skip)
+		    {
+			if (ga_grow(default_args, 1) == FAIL)
+			    goto err_ret;
+
+			// trim trailing whitespace
+			while (p > expr && VIM_ISWHITE(p[-1]))
+			    p--;
+			c = *p;
+			*p = NUL;
+			expr = vim_strsave(expr);
+			if (expr == NULL)
+			{
+			    *p = c;
+			    goto err_ret;
+			}
+			((char_u **)(default_args->ga_data))
+						 [default_args->ga_len] = expr;
+			default_args->ga_len++;
+			*p = c;
+		    }
+		}
+		else
+		    mustend = TRUE;
+	    }
+	    else if (any_default)
+	    {
+		emsg(_(e_non_default_argument_follows_default_argument));
+		goto err_ret;
+	    }
+
+	    if (VIM_ISWHITE(*p) && *skipwhite(p) == ',')
+	    {
+		// Be tolerant when skipping
+		if (!skip)
+		{
+		    semsg(_(e_no_white_space_allowed_before_str_str), ",", p);
+		    goto err_ret;
+		}
+		p = skipwhite(p);
+	    }
+	    if (*p == ',')
+	    {
+		++p;
+		// Don't give this error when skipping, it makes the "->" not
+		// found in "{k,v -> x}" and give a confusing error.
+		// Allow missing space after comma in legacy functions.
+		if (!skip && argtypes != NULL
+				      && !IS_WHITE_OR_NUL(*p) && *p != endchar)
+		{
+		    semsg(_(e_white_space_required_after_str_str), ",", p - 1);
+		    goto err_ret;
+		}
+	    }
+	    else
+		mustend = TRUE;
+	}
+	whitep = p;
+	p = skipwhite(p);
+    }
+
+    if (*p != endchar)
+	goto err_ret;
+    ++p;	// skip "endchar"
+
+    *argp = p;
+    return OK;
+
+err_ret:
+    if (newargs != NULL)
+	ga_clear_strings(newargs);
+    if (!skip && default_args != NULL)
+	ga_clear_strings(default_args);
+    return FAIL;
+}
+
+/*
+ * Parse the argument types, filling "fp->uf_arg_types".
+ * Return OK or FAIL.
+ */
+    static int
+parse_argument_types(ufunc_T *fp, garray_T *argtypes, int varargs)
+{
+    int len = 0;
+
+    ga_init2(&fp->uf_type_list, sizeof(type_T *), 10);
+    if (argtypes->ga_len > 0)
+    {
+	// When "varargs" is set the last name/type goes into uf_va_name
+	// and uf_va_type.
+	len = argtypes->ga_len - (varargs ? 1 : 0);
+
+	if (len > 0)
+	    fp->uf_arg_types = ALLOC_CLEAR_MULT(type_T *, len);
+	if (fp->uf_arg_types != NULL)
+	{
+	    int	i;
+	    type_T	*type;
+
+	    for (i = 0; i < len; ++ i)
+	    {
+		char_u *p = ((char_u **)argtypes->ga_data)[i];
+
+		if (p == NULL)
+		    // will get the type from the default value
+		    type = &t_unknown;
+		else
+		    type = parse_type(&p, &fp->uf_type_list, TRUE);
+		if (type == NULL)
+		    return FAIL;
+		fp->uf_arg_types[i] = type;
+		if (i < fp->uf_args.ga_len
+			&& (type->tt_type == VAR_FUNC
+			    || type->tt_type == VAR_PARTIAL)
+			&& var_wrong_func_name(
+				    ((char_u **)fp->uf_args.ga_data)[i], TRUE))
+		    return FAIL;
+	    }
+	}
+    }
+
+    if (varargs)
+    {
+	char_u *p;
+
+	// Move the last argument "...name: type" to uf_va_name and
+	// uf_va_type.
+	--fp->uf_args.ga_len;
+	fp->uf_va_name = ((char_u **)fp->uf_args.ga_data)[fp->uf_args.ga_len];
+	((char_u **)fp->uf_args.ga_data)[fp->uf_args.ga_len] = NULL;
+	p = ((char_u **)argtypes->ga_data)[len];
+	if (p == NULL)
+	    // TODO: get type from default value
+	    fp->uf_va_type = &t_list_any;
+	else
+	{
+	    fp->uf_va_type = parse_type(&p, &fp->uf_type_list, TRUE);
+	    if (fp->uf_va_type != NULL && fp->uf_va_type->tt_type != VAR_LIST)
+	    {
+		semsg(_(e_variable_arguments_type_must_be_list_str),
+					  ((char_u **)argtypes->ga_data)[len]);
+		return FAIL;
+	    }
+	}
+	if (fp->uf_va_type == NULL)
+	    return FAIL;
+    }
+
+    return OK;
+}
+
+    static int
+parse_return_type(ufunc_T *fp, char_u *ret_type)
+{
+    if (ret_type == NULL)
+	fp->uf_ret_type = &t_void;
+    else
+    {
+	char_u *p = ret_type;
+
+	fp->uf_ret_type = parse_type(&p, &fp->uf_type_list, TRUE);
+	if (fp->uf_ret_type == NULL)
+	{
+	    fp->uf_ret_type = &t_void;
+	    return FAIL;
+	}
+    }
+    return OK;
+}
+
+/*
+ * Register function "fp" as using "current_funccal" as its scope.
+ */
+    static int
+register_closure(ufunc_T *fp)
+{
+    if (fp->uf_scoped == current_funccal)
+	// no change
+	return OK;
+    funccal_unref(fp->uf_scoped, fp, FALSE);
+    fp->uf_scoped = current_funccal;
+    current_funccal->fc_refcount++;
+
+    if (ga_grow(&current_funccal->fc_ufuncs, 1) == FAIL)
+	return FAIL;
+    ((ufunc_T **)current_funccal->fc_ufuncs.ga_data)
+				    [current_funccal->fc_ufuncs.ga_len++] = fp;
+    return OK;
+}
+
+    static void
+set_ufunc_name(ufunc_T *fp, char_u *name)
+{
+    // Add a type cast to avoid a warning for an overflow, the uf_name[] array
+    // actually extends beyond the struct.
+    STRCPY((void *)fp->uf_name, name);
+
+    if (name[0] == K_SPECIAL)
+    {
+	fp->uf_name_exp = alloc(STRLEN(name) + 3);
+	if (fp->uf_name_exp != NULL)
+	{
+	    STRCPY(fp->uf_name_exp, "<SNR>");
+	    STRCAT(fp->uf_name_exp, fp->uf_name + 3);
+	}
+    }
+}
+
+/*
+ * If "name" starts with K_SPECIAL and "buf[bufsize]" is big enough
+ * return "buf" filled with a readable function name.
+ * Otherwise just return "name", thus the return value can always be used.
+ * "name" and "buf" may be equal.
+ */
+    char_u *
+make_ufunc_name_readable(char_u *name, char_u *buf, size_t bufsize)
+{
+    size_t len;
+
+    if (name[0] != K_SPECIAL)
+	return name;
+    len = STRLEN(name);
+    if (len + 3 > bufsize)
+	return name;
+
+    mch_memmove(buf + 5, name + 3, len - 2);  // Include trailing NUL
+    mch_memmove(buf, "<SNR>", 5);
+    return buf;
+}
+
+/*
+ * Get a name for a lambda.  Returned in static memory.
+ */
+    char_u *
+get_lambda_name(void)
+{
+    static char_u   name[30];
+    static int	    lambda_no = 0;
+
+    sprintf((char*)name, "<lambda>%d", ++lambda_no);
+    return name;
+}
+
+/*
+ * Allocate a "ufunc_T" for a function called "name".
+ * Makes sure the size is right.
+ */
+    static ufunc_T *
+alloc_ufunc(char_u *name)
+{
+    // When the name is short we need to make sure we allocate enough bytes for
+    // the whole struct, including any padding.
+    size_t len = offsetof(ufunc_T, uf_name) + STRLEN(name) + 1;
+    return alloc_clear(len < sizeof(ufunc_T) ? sizeof(ufunc_T) : len);
+}
+
+#if defined(FEAT_LUA) || defined(PROTO)
+/*
+ * Registers a native C callback which can be called from Vim script.
+ * Returns the name of the Vim script function.
+ */
+    char_u *
+register_cfunc(cfunc_T cb, cfunc_free_T cb_free, void *state)
+{
+    char_u	*name = get_lambda_name();
+    ufunc_T	*fp;
+
+    fp = alloc_ufunc(name);
+    if (fp == NULL)
+	return NULL;
+
+    fp->uf_def_status = UF_NOT_COMPILED;
+    fp->uf_refcount = 1;
+    fp->uf_varargs = TRUE;
+    fp->uf_flags = FC_CFUNC | FC_LAMBDA;
+    fp->uf_calls = 0;
+    fp->uf_script_ctx = current_sctx;
+    fp->uf_cb = cb;
+    fp->uf_cb_free = cb_free;
+    fp->uf_cb_state = state;
+
+    set_ufunc_name(fp, name);
+    hash_add(&func_hashtab, UF2HIKEY(fp), "add C function");
+
+    return name;
+}
+#endif
+
+/*
+ * Skip over "->" or "=>" after the arguments of a lambda.
+ * If ": type" is found make "ret_type" point to "type".
+ * If "white_error" is not NULL check for correct use of white space and set
+ * "white_error" to TRUE if there is an error.
+ * Return NULL if no valid arrow found.
+ */
+    static char_u *
+skip_arrow(
+	char_u	*start,
+	int	equal_arrow,
+	char_u	**ret_type,
+	int	*white_error)
+{
+    char_u  *s = start;
+    char_u  *bef = start - 2; // "start" points to > of ->
+
+    if (equal_arrow)
+    {
+	if (*s == ':')
+	{
+	    if (white_error != NULL && !VIM_ISWHITE(s[1]))
+	    {
+		*white_error = TRUE;
+		semsg(_(e_white_space_required_after_str_str), ":", s);
+		return NULL;
+	    }
+	    s = skipwhite(s + 1);
+	    *ret_type = s;
+	    s = skip_type(s, TRUE);
+	    if (s == *ret_type)
+	    {
+		emsg(_(e_missing_return_type));
+		return NULL;
+	    }
+	}
+	bef = s;
+	s = skipwhite(s);
+	if (*s != '=')
+	    return NULL;
+	++s;
+    }
+    if (*s != '>')
+	return NULL;
+    if (white_error != NULL && ((!VIM_ISWHITE(*bef) && *bef != '{')
+		|| !IS_WHITE_OR_NUL(s[1])))
+    {
+	*white_error = TRUE;
+	semsg(_(e_white_space_required_before_and_after_str_at_str),
+					       equal_arrow ? "=>" : "->", bef);
+	return NULL;
+    }
+    return skipwhite(s + 1);
+}
+
+/*
+ * Check if "*cmd" points to a function command and if so advance "*cmd" and
+ * return TRUE.
+ * Otherwise return FALSE;
+ * Do not consider "function(" to be a command.
+ */
+    static int
+is_function_cmd(char_u **cmd)
+{
+    char_u *p = *cmd;
+
+    if (checkforcmd(&p, "function", 2))
+    {
+	if (*p == '(')
+	    return FALSE;
+	*cmd = p;
+	return TRUE;
+    }
+    return FALSE;
+}
+
+/*
+ * Called when defining a function: The context may be needed for script
+ * variables declared in a block that is visible now but not when the function
+ * is compiled or called later.
+ */
+    static void
+function_using_block_scopes(ufunc_T *fp, cstack_T *cstack)
+{
+    if (cstack == NULL || cstack->cs_idx < 0)
+	return;
+
+    int	    count = cstack->cs_idx + 1;
+    int	    i;
+
+    fp->uf_block_ids = ALLOC_MULT(int, count);
+    if (fp->uf_block_ids != NULL)
+    {
+	mch_memmove(fp->uf_block_ids, cstack->cs_block_id,
+		sizeof(int) * count);
+	fp->uf_block_depth = count;
+    }
+
+    // Set flag in each block to indicate a function was defined.  This
+    // is used to keep the variable when leaving the block, see
+    // hide_script_var().
+    for (i = 0; i <= cstack->cs_idx; ++i)
+	cstack->cs_flags[i] |= CSF_FUNC_DEF;
+}
+
+/*
+ * Read the body of a function, put every line in "newlines".
+ * This stops at "}", "endfunction" or "enddef".
+ * "newlines" must already have been initialized.
+ * "eap->cmdidx" is CMD_function, CMD_def or CMD_block;
+ */
+    static int
+get_function_body(
+	exarg_T	    *eap,
+	garray_T    *newlines,
+	char_u	    *line_arg_in,
+	garray_T    *lines_to_free)
+{
+    linenr_T	sourcing_lnum_top = SOURCING_LNUM;
+    linenr_T	sourcing_lnum_off;
+    int		saved_wait_return = need_wait_return;
+    char_u	*line_arg = line_arg_in;
+    int		vim9_function = eap->cmdidx == CMD_def
+						   || eap->cmdidx == CMD_block;
+#define MAX_FUNC_NESTING 50
+    char	nesting_def[MAX_FUNC_NESTING];
+    char	nesting_inline[MAX_FUNC_NESTING];
+    int		nesting = 0;
+    getline_opt_T getline_options;
+    int		indent = 2;
+    char_u	*skip_until = NULL;
+    int		ret = FAIL;
+    int		is_heredoc = FALSE;
+    int		heredoc_concat_len = 0;
+    garray_T	heredoc_ga;
+    char_u	*heredoc_trimmed = NULL;
+
+    ga_init2(&heredoc_ga, 1, 500);
+
+    // Detect having skipped over comment lines to find the return
+    // type.  Add NULL lines to keep the line count correct.
+    sourcing_lnum_off = get_sourced_lnum(eap->getline, eap->cookie);
+    if (SOURCING_LNUM < sourcing_lnum_off)
+    {
+	sourcing_lnum_off -= SOURCING_LNUM;
+	if (ga_grow(newlines, sourcing_lnum_off) == FAIL)
+	    goto theend;
+	while (sourcing_lnum_off-- > 0)
+	    ((char_u **)(newlines->ga_data))[newlines->ga_len++] = NULL;
+    }
+
+    nesting_def[0] = vim9_function;
+    nesting_inline[0] = eap->cmdidx == CMD_block;
+    getline_options = vim9_function
+				? GETLINE_CONCAT_CONTBAR : GETLINE_CONCAT_CONT;
+    for (;;)
+    {
+	char_u	*theline;
+	char_u	*p;
+	char_u	*arg;
+
+	if (KeyTyped)
+	{
+	    msg_scroll = TRUE;
+	    saved_wait_return = FALSE;
+	}
+	need_wait_return = FALSE;
+
+	if (line_arg != NULL)
+	{
+	    // Use eap->arg, split up in parts by line breaks.
+	    theline = line_arg;
+	    p = vim_strchr(theline, '\n');
+	    if (p == NULL)
+		line_arg += STRLEN(line_arg);
+	    else
+	    {
+		*p = NUL;
+		line_arg = p + 1;
+	    }
+	}
+	else
+	{
+	    theline = get_function_line(eap, lines_to_free, indent,
+							      getline_options);
+	}
+	if (KeyTyped)
+	    lines_left = Rows - 1;
+	if (theline == NULL)
+	{
+	    // Use the start of the function for the line number.
+	    SOURCING_LNUM = sourcing_lnum_top;
+	    if (skip_until != NULL)
+		semsg(_(e_missing_heredoc_end_marker_str), skip_until);
+	    else if (nesting_inline[nesting])
+		emsg(_(e_missing_end_block));
+	    else if (eap->cmdidx == CMD_def)
+		emsg(_(e_missing_enddef));
+	    else
+		emsg(_(e_missing_endfunction));
+	    goto theend;
+	}
+
+	// Detect line continuation: SOURCING_LNUM increased more than one.
+	sourcing_lnum_off = get_sourced_lnum(eap->getline, eap->cookie);
+	if (SOURCING_LNUM < sourcing_lnum_off)
+	    sourcing_lnum_off -= SOURCING_LNUM;
+	else
+	    sourcing_lnum_off = 0;
+
+	if (skip_until != NULL)
+	{
+	    // Don't check for ":endfunc"/":enddef" between
+	    // * ":append" and "."
+	    // * ":python <<EOF" and "EOF"
+	    // * ":let {var-name} =<< [trim] {marker}" and "{marker}"
+	    if (heredoc_trimmed == NULL
+		    || (is_heredoc && skipwhite(theline) == theline)
+		    || STRNCMP(theline, heredoc_trimmed,
+						 STRLEN(heredoc_trimmed)) == 0)
+	    {
+		if (heredoc_trimmed == NULL)
+		    p = theline;
+		else if (is_heredoc)
+		    p = skipwhite(theline) == theline
+				 ? theline : theline + STRLEN(heredoc_trimmed);
+		else
+		    p = theline + STRLEN(heredoc_trimmed);
+		if (STRCMP(p, skip_until) == 0)
+		{
+		    VIM_CLEAR(skip_until);
+		    VIM_CLEAR(heredoc_trimmed);
+		    getline_options = vim9_function
+				? GETLINE_CONCAT_CONTBAR : GETLINE_CONCAT_CONT;
+		    is_heredoc = FALSE;
+
+		    if (heredoc_concat_len > 0)
+		    {
+			// Replace the starting line with all the concatenated
+			// lines.
+			ga_concat(&heredoc_ga, theline);
+			vim_free(((char_u **)(newlines->ga_data))[
+						      heredoc_concat_len - 1]);
+			((char_u **)(newlines->ga_data))[
+				  heredoc_concat_len - 1] = heredoc_ga.ga_data;
+			ga_init(&heredoc_ga);
+			heredoc_concat_len = 0;
+			theline += STRLEN(theline);  // skip the "EOF"
+		    }
+		}
+	    }
+	}
+	else
+	{
+	    int	    c;
+	    char_u  *end;
+	    char_u  *cmd;
+
+	    // skip ':' and blanks
+	    for (p = theline; VIM_ISWHITE(*p) || *p == ':'; ++p)
+		;
+
+	    // Check for "endfunction", "enddef" or "}".
+	    // When a ":" follows it must be a dict key; "enddef: value,"
+	    cmd = p;
+	    if (nesting_inline[nesting]
+		    ? *p == '}'
+		    : (checkforcmd(&p, nesting_def[nesting]
+						? "enddef" : "endfunction", 4)
+			&& *p != ':'))
+	    {
+		if (!nesting_inline[nesting] && nesting_def[nesting]
+								&& p < cmd + 6)
+		    semsg(_(e_command_cannot_be_shortened_str), "enddef");
+		if (nesting-- == 0)
+		{
+		    char_u *nextcmd = NULL;
+
+		    if (*p == '|' || *p == '}')
+			nextcmd = p + 1;
+		    else if (line_arg != NULL && *skipwhite(line_arg) != NUL)
+			nextcmd = line_arg;
+		    else if (*p != NUL && *p != (vim9_function ? '#' : '"')
+					   && (vim9_function || p_verbose > 0))
+		    {
+			SOURCING_LNUM = sourcing_lnum_top
+							+ newlines->ga_len + 1;
+			if (eap->cmdidx == CMD_def)
+			    semsg(_(e_text_found_after_str_str), "enddef", p);
+			else
+			    give_warning2((char_u *)
+				   _("W22: Text found after :endfunction: %s"),
+				   p, TRUE);
+		    }
+		    if (nextcmd != NULL && *skipwhite(nextcmd) != NUL)
+		    {
+			// Another command follows. If the line came from "eap"
+			// we can simply point into it, otherwise we need to
+			// change "eap->cmdlinep" to point to the last fetched
+			// line.
+			eap->nextcmd = nextcmd;
+			if (lines_to_free->ga_len > 0
+				&& *eap->cmdlinep !=
+					    ((char_u **)lines_to_free->ga_data)
+						   [lines_to_free->ga_len - 1])
+			{
+			    // *cmdlinep will be freed later, thus remove the
+			    // line from lines_to_free.
+			    vim_free(*eap->cmdlinep);
+			    *eap->cmdlinep = ((char_u **)lines_to_free->ga_data)
+						   [lines_to_free->ga_len - 1];
+			    --lines_to_free->ga_len;
+			}
+		    }
+		    break;
+		}
+	    }
+
+	    // Check for mismatched "endfunc" or "enddef".
+	    // We don't check for "def" inside "func" thus we also can't check
+	    // for "enddef".
+	    // We continue to find the end of the function, although we might
+	    // not find it.
+	    else if (nesting_def[nesting])
+	    {
+		if (checkforcmd(&p, "endfunction", 4) && *p != ':')
+		    emsg(_(e_mismatched_endfunction));
+	    }
+	    else if (eap->cmdidx == CMD_def && checkforcmd(&p, "enddef", 4))
+		emsg(_(e_mismatched_enddef));
+
+	    // Increase indent inside "if", "while", "for" and "try", decrease
+	    // at "end".
+	    if (indent > 2 && (*p == '}' || STRNCMP(p, "end", 3) == 0))
+		indent -= 2;
+	    else if (STRNCMP(p, "if", 2) == 0
+		    || STRNCMP(p, "wh", 2) == 0
+		    || STRNCMP(p, "for", 3) == 0
+		    || STRNCMP(p, "try", 3) == 0)
+		indent += 2;
+
+	    // Check for defining a function inside this function.
+	    // Only recognize "def" inside "def", not inside "function",
+	    // For backwards compatibility, see Test_function_python().
+	    c = *p;
+	    if (is_function_cmd(&p)
+		    || (eap->cmdidx == CMD_def && checkforcmd(&p, "def", 3)))
+	    {
+		if (*p == '!')
+		    p = skipwhite(p + 1);
+		p += eval_fname_script(p);
+		vim_free(trans_function_name(&p, NULL, TRUE, 0));
+		if (*skipwhite(p) == '(')
+		{
+		    if (nesting == MAX_FUNC_NESTING - 1)
+			emsg(_(e_function_nesting_too_deep));
+		    else
+		    {
+			++nesting;
+			nesting_def[nesting] = (c == 'd');
+			nesting_inline[nesting] = FALSE;
+			indent += 2;
+		    }
+		}
+	    }
+
+	    if (nesting_def[nesting] ? *p != '#' : *p != '"')
+	    {
+		// Not a comment line: check for nested inline function.
+		end = p + STRLEN(p) - 1;
+		while (end > p && VIM_ISWHITE(*end))
+		    --end;
+		if (end > p + 1 && *end == '{' && VIM_ISWHITE(end[-1]))
+		{
+		    int	    is_block;
+
+		    // check for trailing "=> {": start of an inline function
+		    --end;
+		    while (end > p && VIM_ISWHITE(*end))
+			--end;
+		    is_block = end > p + 2 && end[-1] == '=' && end[0] == '>';
+		    if (!is_block)
+		    {
+			char_u *s = p;
+
+			// check for line starting with "au" for :autocmd or
+			// "com" for :command, these can use a {} block
+			is_block = checkforcmd_noparen(&s, "autocmd", 2)
+				      || checkforcmd_noparen(&s, "command", 3);
+		    }
+
+		    if (is_block)
+		    {
+			if (nesting == MAX_FUNC_NESTING - 1)
+			    emsg(_(e_function_nesting_too_deep));
+			else
+			{
+			    ++nesting;
+			    nesting_def[nesting] = TRUE;
+			    nesting_inline[nesting] = TRUE;
+			    indent += 2;
+			}
+		    }
+		}
+	    }
+
+	    // Check for ":append", ":change", ":insert".  Not for :def.
+	    p = skip_range(p, FALSE, NULL);
+	    if (!vim9_function
+		&& ((p[0] == 'a' && (!ASCII_ISALPHA(p[1]) || p[1] == 'p'))
+		    || (p[0] == 'c'
+			&& (!ASCII_ISALPHA(p[1]) || (p[1] == 'h'
+				&& (!ASCII_ISALPHA(p[2]) || (p[2] == 'a'
+					&& (STRNCMP(&p[3], "nge", 3) != 0
+					    || !ASCII_ISALPHA(p[6])))))))
+		    || (p[0] == 'i'
+			&& (!ASCII_ISALPHA(p[1]) || (p[1] == 'n'
+				&& (!ASCII_ISALPHA(p[2])
+				    || (p[2] == 's'
+					&& (!ASCII_ISALPHA(p[3])
+						|| p[3] == 'e'))))))))
+		skip_until = vim_strsave((char_u *)".");
+
+	    // Check for ":python <<EOF", ":tcl <<EOF", etc.
+	    arg = skipwhite(skiptowhite(p));
+	    if (arg[0] == '<' && arg[1] =='<'
+		    && ((p[0] == 'p' && p[1] == 'y'
+				    && (!ASCII_ISALNUM(p[2]) || p[2] == 't'
+					|| ((p[2] == '3' || p[2] == 'x')
+						   && !ASCII_ISALPHA(p[3]))))
+			|| (p[0] == 'p' && p[1] == 'e'
+				    && (!ASCII_ISALPHA(p[2]) || p[2] == 'r'))
+			|| (p[0] == 't' && p[1] == 'c'
+				    && (!ASCII_ISALPHA(p[2]) || p[2] == 'l'))
+			|| (p[0] == 'l' && p[1] == 'u' && p[2] == 'a'
+				    && !ASCII_ISALPHA(p[3]))
+			|| (p[0] == 'r' && p[1] == 'u' && p[2] == 'b'
+				    && (!ASCII_ISALPHA(p[3]) || p[3] == 'y'))
+			|| (p[0] == 'm' && p[1] == 'z'
+				    && (!ASCII_ISALPHA(p[2]) || p[2] == 's'))
+			))
+	    {
+		// ":python <<" continues until a dot, like ":append"
+		p = skipwhite(arg + 2);
+		if (STRNCMP(p, "trim", 4) == 0)
+		{
+		    // Ignore leading white space.
+		    p = skipwhite(p + 4);
+		    heredoc_trimmed = vim_strnsave(theline,
+						 skipwhite(theline) - theline);
+		}
+		if (*p == NUL)
+		    skip_until = vim_strsave((char_u *)".");
+		else
+		    skip_until = vim_strnsave(p, skiptowhite(p) - p);
+		getline_options = GETLINE_NONE;
+		is_heredoc = TRUE;
+		if (eap->cmdidx == CMD_def && nesting == 0)
+		    heredoc_concat_len = newlines->ga_len + 1;
+	    }
+
+	    if (!is_heredoc)
+	    {
+		// Check for ":cmd v =<< [trim] EOF"
+		//       and ":cmd [a, b] =<< [trim] EOF"
+		//       and "lines =<< [trim] EOF" for Vim9
+		// Where "cmd" can be "let", "var", "final" or "const".
+		arg = skipwhite(skiptowhite(p));
+		if (*arg == '[')
+		    arg = vim_strchr(arg, ']');
+		if (arg != NULL)
+		{
+		    int found = (eap->cmdidx == CMD_def && arg[0] == '='
+					     && arg[1] == '<' && arg[2] =='<');
+
+		    if (!found)
+			// skip over the argument after "cmd"
+			arg = skipwhite(skiptowhite(arg));
+		    if (found || (arg[0] == '=' && arg[1] == '<'
+								&& arg[2] =='<'
+			    && (checkforcmd(&p, "let", 2)
+				|| checkforcmd(&p, "var", 3)
+				|| checkforcmd(&p, "final", 5)
+				|| checkforcmd(&p, "const", 5))))
+		    {
+			p = skipwhite(arg + 3);
+			while (TRUE)
+			{
+			    if (STRNCMP(p, "trim", 4) == 0)
+			    {
+				// Ignore leading white space.
+				p = skipwhite(p + 4);
+				heredoc_trimmed = vim_strnsave(theline,
+					skipwhite(theline) - theline);
+				continue;
+			    }
+			    if (STRNCMP(p, "eval", 4) == 0)
+			    {
+				// Ignore leading white space.
+				p = skipwhite(p + 4);
+				continue;
+			    }
+			    break;
+			}
+			skip_until = vim_strnsave(p, skiptowhite(p) - p);
+			getline_options = GETLINE_NONE;
+			is_heredoc = TRUE;
+		    }
+		}
+	    }
+	}
+
+	// Add the line to the function.
+	if (ga_grow_id(newlines, 1 + sourcing_lnum_off, aid_get_func) == FAIL)
+	    goto theend;
+
+	if (heredoc_concat_len > 0)
+	{
+	    // For a :def function "python << EOF" concatenates all the lines,
+	    // to be used for the instruction later.
+	    ga_concat(&heredoc_ga, theline);
+	    ga_concat(&heredoc_ga, (char_u *)"\n");
+	    p = vim_strsave((char_u *)"");
+	}
+	else
+	{
+	    // Copy the line to newly allocated memory.  get_one_sourceline()
+	    // allocates 250 bytes per line, this saves 80% on average.  The
+	    // cost is an extra alloc/free.
+	    p = vim_strsave(theline);
+	}
+	if (p == NULL)
+	    goto theend;
+	((char_u **)(newlines->ga_data))[newlines->ga_len++] = p;
+
+	// Add NULL lines for continuation lines, so that the line count is
+	// equal to the index in the growarray.
+	while (sourcing_lnum_off-- > 0)
+	    ((char_u **)(newlines->ga_data))[newlines->ga_len++] = NULL;
+
+	// Check for end of eap->arg.
+	if (line_arg != NULL && *line_arg == NUL)
+	    line_arg = NULL;
+    }
+
+    // Return OK when no error was detected.
+    if (!did_emsg)
+	ret = OK;
+
+theend:
+    vim_free(skip_until);
+    vim_free(heredoc_trimmed);
+    vim_free(heredoc_ga.ga_data);
+    need_wait_return |= saved_wait_return;
+    return ret;
+}
+
+/*
+ * Handle the body of a lambda.  *arg points to the "{", process statements
+ * until the matching "}".
+ * When not evaluating "newargs" is NULL.
+ * When successful "rettv" is set to a funcref.
+ */
+    static int
+lambda_function_body(
+	char_u	    **arg,
+	typval_T    *rettv,
+	evalarg_T   *evalarg,
+	garray_T    *newargs,
+	garray_T    *argtypes,
+	int	    varargs,
+	garray_T    *default_args,
+	char_u	    *ret_type)
+{
+    char_u	*start = *arg;
+    int		evaluate = (evalarg->eval_flags & EVAL_EVALUATE);
+    garray_T	*gap = &evalarg->eval_ga;
+    garray_T	*freegap = &evalarg->eval_freega;
+    ufunc_T	*ufunc = NULL;
+    exarg_T	eap;
+    garray_T	newlines;
+    char_u	*cmdline = NULL;
+    int		ret = FAIL;
+    partial_T	*pt;
+    char_u	*name;
+    int		lnum_save = -1;
+    linenr_T	sourcing_lnum_top = SOURCING_LNUM;
+
+    *arg = skipwhite(*arg + 1);
+    if (**arg == '|' || !ends_excmd2(start, *arg))
+    {
+	semsg(_(e_trailing_characters_str), *arg);
+	return FAIL;
+    }
+
+    CLEAR_FIELD(eap);
+    eap.cmdidx = CMD_block;
+    eap.forceit = FALSE;
+    eap.cmdlinep = &cmdline;
+    eap.skip = !evaluate;
+    if (evalarg->eval_cctx != NULL)
+	fill_exarg_from_cctx(&eap, evalarg->eval_cctx);
+    else
+    {
+	eap.getline = evalarg->eval_getline;
+	eap.cookie = evalarg->eval_cookie;
+    }
+
+    ga_init2(&newlines, sizeof(char_u *), 10);
+    if (get_function_body(&eap, &newlines, NULL,
+					     &evalarg->eval_tofree_ga) == FAIL)
+	goto erret;
+
+    // When inside a lambda must add the function lines to evalarg.eval_ga.
+    evalarg->eval_break_count += newlines.ga_len;
+    if (gap->ga_itemsize > 0)
+    {
+	int	idx;
+	char_u	*last;
+	size_t  plen;
+	char_u  *pnl;
+
+	for (idx = 0; idx < newlines.ga_len; ++idx)
+	{
+	    char_u  *p = skipwhite(((char_u **)newlines.ga_data)[idx]);
+
+	    if (ga_grow(gap, 1) == FAIL || ga_grow(freegap, 1) == FAIL)
+		goto erret;
+
+	    // Going to concatenate the lines after parsing.  For an empty or
+	    // comment line use an empty string.
+	    // Insert NL characters at the start of each line, the string will
+	    // be split again later in .get_lambda_tv().
+	    if (*p == NUL || vim9_comment_start(p))
+		p = (char_u *)"";
+	    plen = STRLEN(p);
+	    pnl = vim_strnsave((char_u *)"\n", plen + 1);
+	    if (pnl != NULL)
+		mch_memmove(pnl + 1, p, plen + 1);
+	    ((char_u **)gap->ga_data)[gap->ga_len++] = pnl;
+	    ((char_u **)freegap->ga_data)[freegap->ga_len++] = pnl;
+	}
+	if (ga_grow(gap, 1) == FAIL || ga_grow(freegap, 1) == FAIL)
+	    goto erret;
+	if (eap.nextcmd != NULL)
+	    // more is following after the "}", which was skipped
+	    last = cmdline;
+	else
+	    // nothing is following the "}"
+	    last = (char_u *)"}";
+	plen = STRLEN(last);
+	pnl = vim_strnsave((char_u *)"\n", plen + 1);
+	if (pnl != NULL)
+	    mch_memmove(pnl + 1, last, plen + 1);
+	((char_u **)gap->ga_data)[gap->ga_len++] = pnl;
+	((char_u **)freegap->ga_data)[freegap->ga_len++] = pnl;
+    }
+
+    if (eap.nextcmd != NULL)
+    {
+	garray_T *tfgap = &evalarg->eval_tofree_ga;
+
+	// Something comes after the "}".
+	*arg = eap.nextcmd;
+
+	// "arg" points into cmdline, need to keep the line and free it later.
+	if (ga_grow(tfgap, 1) == OK)
+	{
+	    ((char_u **)(tfgap->ga_data))[tfgap->ga_len++] = cmdline;
+	    evalarg->eval_using_cmdline = TRUE;
+	}
+    }
+    else
+	*arg = (char_u *)"";
+
+    if (!evaluate)
+    {
+	ret = OK;
+	goto erret;
+    }
+
+    name = get_lambda_name();
+    ufunc = alloc_ufunc(name);
+    if (ufunc == NULL)
+	goto erret;
+    set_ufunc_name(ufunc, name);
+    if (hash_add(&func_hashtab, UF2HIKEY(ufunc), "add function") == FAIL)
+	goto erret;
+    ufunc->uf_flags = FC_LAMBDA;
+    ufunc->uf_refcount = 1;
+    ufunc->uf_args = *newargs;
+    newargs->ga_data = NULL;
+    ufunc->uf_def_args = *default_args;
+    default_args->ga_data = NULL;
+    ufunc->uf_func_type = &t_func_any;
+
+    // error messages are for the first function line
+    lnum_save = SOURCING_LNUM;
+    SOURCING_LNUM = sourcing_lnum_top;
+
+    // parse argument types
+    if (parse_argument_types(ufunc, argtypes, varargs) == FAIL)
+    {
+	SOURCING_LNUM = lnum_save;
+	goto erret;
+    }
+
+    // parse the return type, if any
+    if (parse_return_type(ufunc, ret_type) == FAIL)
+	goto erret;
+
+    pt = ALLOC_CLEAR_ONE(partial_T);
+    if (pt == NULL)
+	goto erret;
+    pt->pt_func = ufunc;
+    pt->pt_refcount = 1;
+
+    ufunc->uf_lines = newlines;
+    newlines.ga_data = NULL;
+    if (sandbox)
+	ufunc->uf_flags |= FC_SANDBOX;
+    if (!ASCII_ISUPPER(*ufunc->uf_name))
+	ufunc->uf_flags |= FC_VIM9;
+    ufunc->uf_script_ctx = current_sctx;
+    ufunc->uf_script_ctx_version = current_sctx.sc_version;
+    ufunc->uf_script_ctx.sc_lnum += sourcing_lnum_top;
+    set_function_type(ufunc);
+
+    function_using_block_scopes(ufunc, evalarg->eval_cstack);
+
+    rettv->vval.v_partial = pt;
+    rettv->v_type = VAR_PARTIAL;
+    ufunc = NULL;
+    ret = OK;
+
+erret:
+    if (lnum_save >= 0)
+	SOURCING_LNUM = lnum_save;
+    ga_clear_strings(&newlines);
+    if (newargs != NULL)
+	ga_clear_strings(newargs);
+    ga_clear_strings(default_args);
+    if (ufunc != NULL)
+    {
+	func_clear(ufunc, TRUE);
+	func_free(ufunc, TRUE);
+    }
+    return ret;
+}
+
+/*
+ * Parse a lambda expression and get a Funcref from "*arg" into "rettv".
+ * "arg" points to the { in "{arg -> expr}" or the ( in "(arg) => expr"
+ * When "types_optional" is TRUE optionally take argument types.
+ * Return OK or FAIL.  Returns NOTDONE for dict or {expr}.
+ */
+    int
+get_lambda_tv(
+	char_u	    **arg,
+	typval_T    *rettv,
+	int	    types_optional,
+	evalarg_T   *evalarg)
+{
+    int		evaluate = evalarg != NULL
+				      && (evalarg->eval_flags & EVAL_EVALUATE);
+    garray_T	newargs;
+    garray_T	newlines;
+    garray_T	*pnewargs;
+    garray_T	argtypes;
+    garray_T	default_args;
+    ufunc_T	*fp = NULL;
+    partial_T   *pt = NULL;
+    int		varargs;
+    char_u	*ret_type = NULL;
+    int		ret;
+    char_u	*s;
+    char_u	*start, *end;
+    int		*old_eval_lavars = eval_lavars_used;
+    int		eval_lavars = FALSE;
+    char_u	*tofree2 = NULL;
+    int		equal_arrow = **arg == '(';
+    int		white_error = FALSE;
+    int		called_emsg_start = called_emsg;
+    int		vim9script = in_vim9script();
+    long	start_lnum = SOURCING_LNUM;
+
+    if (equal_arrow && !vim9script)
+	return NOTDONE;
+
+    ga_init(&newargs);
+    ga_init(&newlines);
+
+    // First, check if this is really a lambda expression. "->" or "=>" must
+    // be found after the arguments.
+    s = *arg + 1;
+    ret = get_function_args(&s, equal_arrow ? ')' : '-', NULL,
+	    types_optional ? &argtypes : NULL, types_optional, evalarg,
+			   NULL, &default_args, TRUE, NULL, FALSE, NULL, NULL);
+    if (ret == FAIL || skip_arrow(s, equal_arrow, &ret_type, NULL) == NULL)
+    {
+	if (types_optional)
+	    ga_clear_strings(&argtypes);
+	return called_emsg == called_emsg_start ? NOTDONE : FAIL;
+    }
+
+    // Parse the arguments for real.
+    if (evaluate)
+	pnewargs = &newargs;
+    else
+	pnewargs = NULL;
+    *arg += 1;
+    ret = get_function_args(arg, equal_arrow ? ')' : '-', pnewargs,
+	    types_optional ? &argtypes : NULL, types_optional, evalarg,
+					    &varargs, &default_args,
+					    FALSE, NULL, FALSE, NULL, NULL);
+    if (ret == FAIL
+		  || (s = skip_arrow(*arg, equal_arrow, &ret_type,
+		equal_arrow || vim9script ? &white_error : NULL)) == NULL)
+    {
+	if (types_optional)
+	    ga_clear_strings(&argtypes);
+	ga_clear_strings(&newargs);
+	return white_error ? FAIL : NOTDONE;
+    }
+    *arg = s;
+
+    // Skipping over linebreaks may make "ret_type" invalid, make a copy.
+    if (ret_type != NULL)
+    {
+	ret_type = vim_strsave(ret_type);
+	tofree2 = ret_type;
+    }
+
+    // Set up a flag for checking local variables and arguments.
+    if (evaluate)
+	eval_lavars_used = &eval_lavars;
+
+    *arg = skipwhite_and_linebreak(*arg, evalarg);
+
+    // Recognize "{" as the start of a function body.
+    if (equal_arrow && **arg == '{')
+    {
+	if (evalarg == NULL)
+	    // cannot happen?
+	    goto theend;
+	SOURCING_LNUM = start_lnum;  // used for where lambda is defined
+	if (lambda_function_body(arg, rettv, evalarg, pnewargs,
+			   types_optional ? &argtypes : NULL, varargs,
+			   &default_args, ret_type) == FAIL)
+	    goto errret;
+	goto theend;
+    }
+    if (default_args.ga_len > 0)
+    {
+	emsg(_(e_cannot_use_default_values_in_lambda));
+	goto errret;
+    }
+
+    // Get the start and the end of the expression.
+    start = *arg;
+    ret = skip_expr_concatenate(arg, &start, &end, evalarg);
+    if (ret == FAIL)
+	goto errret;
+
+    if (!equal_arrow)
+    {
+	*arg = skipwhite_and_linebreak(*arg, evalarg);
+	if (**arg != '}')
+	{
+	    semsg(_(e_expected_right_curly_str), *arg);
+	    goto errret;
+	}
+	++*arg;
+    }
+
+    if (evaluate)
+    {
+	int	    len;
+	int	    flags = FC_LAMBDA;
+	char_u	    *p;
+	char_u	    *line_end;
+	char_u	    *name = get_lambda_name();
+
+	fp = alloc_ufunc(name);
+	if (fp == NULL)
+	    goto errret;
+	fp->uf_def_status = UF_NOT_COMPILED;
+	pt = ALLOC_CLEAR_ONE(partial_T);
+	if (pt == NULL)
+	    goto errret;
+
+	ga_init2(&newlines, sizeof(char_u *), 1);
+	if (ga_grow(&newlines, 1) == FAIL)
+	    goto errret;
+
+	// If there are line breaks, we need to split up the string.
+	line_end = vim_strchr(start, '\n');
+	if (line_end == NULL || line_end > end)
+	    line_end = end;
+
+	// Add "return " before the expression (or the first line).
+	len = 7 + (int)(line_end - start) + 1;
+	p = alloc(len);
+	if (p == NULL)
+	    goto errret;
+	((char_u **)(newlines.ga_data))[newlines.ga_len++] = p;
+	STRCPY(p, "return ");
+	vim_strncpy(p + 7, start, line_end - start);
+
+	if (line_end != end)
+	{
+	    // Add more lines, split by line breaks.  Thus is used when a
+	    // lambda with { cmds } is encountered.
+	    while (*line_end == '\n')
+	    {
+		if (ga_grow(&newlines, 1) == FAIL)
+		    goto errret;
+		start = line_end + 1;
+		line_end = vim_strchr(start, '\n');
+		if (line_end == NULL)
+		    line_end = end;
+		((char_u **)(newlines.ga_data))[newlines.ga_len++] =
+					 vim_strnsave(start, line_end - start);
+	    }
+	}
+
+	if (strstr((char *)p + 7, "a:") == NULL)
+	    // No a: variables are used for sure.
+	    flags |= FC_NOARGS;
+
+	fp->uf_refcount = 1;
+	set_ufunc_name(fp, name);
+	fp->uf_args = newargs;
+	ga_init(&fp->uf_def_args);
+	if (types_optional)
+	{
+	    if (parse_argument_types(fp, &argtypes,
+						vim9script && varargs) == FAIL)
+		goto errret;
+	    if (ret_type != NULL)
+	    {
+		fp->uf_ret_type = parse_type(&ret_type,
+						      &fp->uf_type_list, TRUE);
+		if (fp->uf_ret_type == NULL)
+		    goto errret;
+	    }
+	    else
+		fp->uf_ret_type = &t_unknown;
+	}
+
+	fp->uf_lines = newlines;
+	if (current_funccal != NULL && eval_lavars)
+	{
+	    flags |= FC_CLOSURE;
+	    if (register_closure(fp) == FAIL)
+		goto errret;
+	}
+
+#ifdef FEAT_PROFILE
+	if (prof_def_func())
+	    func_do_profile(fp);
+#endif
+	if (sandbox)
+	    flags |= FC_SANDBOX;
+	// In legacy script a lambda can be called with more args than
+	// uf_args.ga_len.  In Vim9 script "...name" has to be used.
+	fp->uf_varargs = !vim9script || varargs;
+	fp->uf_flags = flags;
+	fp->uf_calls = 0;
+	fp->uf_script_ctx = current_sctx;
+	// Use the line number of the arguments.
+	fp->uf_script_ctx.sc_lnum += start_lnum;
+
+	function_using_block_scopes(fp, evalarg->eval_cstack);
+
+	pt->pt_func = fp;
+	pt->pt_refcount = 1;
+	rettv->vval.v_partial = pt;
+	rettv->v_type = VAR_PARTIAL;
+
+	hash_add(&func_hashtab, UF2HIKEY(fp), "add lambda");
+    }
+
+theend:
+    eval_lavars_used = old_eval_lavars;
+    vim_free(tofree2);
+    if (types_optional)
+	ga_clear_strings(&argtypes);
+
+    return OK;
+
+errret:
+    ga_clear_strings(&newargs);
+    ga_clear_strings(&newlines);
+    ga_clear_strings(&default_args);
+    if (types_optional)
+    {
+	ga_clear_strings(&argtypes);
+	if (fp != NULL)
+	    vim_free(fp->uf_arg_types);
+    }
+    vim_free(fp);
+    vim_free(pt);
+    vim_free(tofree2);
+    eval_lavars_used = old_eval_lavars;
+    return FAIL;
+}
+
+/*
+ * Check if "name" is a variable of type VAR_FUNC.  If so, return the function
+ * name it contains, otherwise return "name".
+ * If "partialp" is not NULL, and "name" is of type VAR_PARTIAL also set
+ * "partialp".
+ * If "type" is not NULL and a Vim9 script-local variable is found look up the
+ * type of the variable.
+ * If "new_function" is TRUE the name is for a new function.
+ * If "found_var" is not NULL and a variable was found set it to TRUE.
+ */
+    char_u *
+deref_func_name(
+	char_u	    *name,
+	int	    *lenp,
+	partial_T   **partialp,
+	type_T	    **type,
+	int	    no_autoload,
+	int	    new_function,
+	int	    *found_var)
+{
+    dictitem_T	*v;
+    typval_T	*tv = NULL;
+    int		cc;
+    char_u	*s = NULL;
+    hashtab_T	*ht;
+    int		did_type = FALSE;
+
+    if (partialp != NULL)
+	*partialp = NULL;
+
+    cc = name[*lenp];
+    name[*lenp] = NUL;
+
+    v = find_var_also_in_script(name, &ht, no_autoload);
+    name[*lenp] = cc;
+    if (v != NULL)
+    {
+	tv = &v->di_tv;
+    }
+    else if (in_vim9script() || STRNCMP(name, "s:", 2) == 0)
+    {
+	imported_T  *import;
+	char_u	    *p = name;
+	int	    len = *lenp;
+
+	if (STRNCMP(name, "s:", 2) == 0)
+	{
+	    p = name + 2;
+	    len -= 2;
+	}
+	import = find_imported(p, len, FALSE);
+
+	// imported function from another script
+	if (import != NULL)
+	{
+	    name[len] = NUL;
+	    if (new_function)
+		semsg(_(e_redefining_imported_item_str), name);
+	    else
+		semsg(_(e_cannot_use_str_itself_it_is_imported), name);
+	    name[len] = cc;
+	    *lenp = 0;
+	    return (char_u *)"";	// just in case
+	}
+    }
+
+    if (tv != NULL)
+    {
+	if (found_var != NULL)
+	    *found_var = TRUE;
+	if (tv->v_type == VAR_FUNC)
+	{
+	    if (tv->vval.v_string == NULL)
+	    {
+		*lenp = 0;
+		return (char_u *)"";	// just in case
+	    }
+	    s = tv->vval.v_string;
+	    *lenp = (int)STRLEN(s);
+	}
+
+	if (tv->v_type == VAR_PARTIAL)
+	{
+	    partial_T *pt = tv->vval.v_partial;
+
+	    if (pt == NULL)
+	    {
+		*lenp = 0;
+		return (char_u *)"";	// just in case
+	    }
+	    if (partialp != NULL)
+		*partialp = pt;
+	    s = partial_name(pt);
+	    *lenp = (int)STRLEN(s);
+	}
+
+	if (s != NULL)
+	{
+	    if (!did_type && type != NULL && ht == get_script_local_ht())
+	    {
+		svar_T  *sv = find_typval_in_script(tv, 0, TRUE);
+
+		if (sv != NULL)
+		    *type = sv->sv_type;
+	    }
+	    return s;
+	}
+    }
+
+    return name;
+}
+
+/*
+ * Give an error message with a function name.  Handle <SNR> things.
+ * "ermsg" is to be passed without translation, use N_() instead of _().
+ */
+    void
+emsg_funcname(char *ermsg, char_u *name)
+{
+    char_u	*p = name;
+
+    if (name[0] == K_SPECIAL && name[1] != NUL && name[2] != NUL)
+	p = concat_str((char_u *)"<SNR>", name + 3);
+    semsg(_(ermsg), p);
+    if (p != name)
+	vim_free(p);
+}
+
+/*
+ * Get function arguments at "*arg" and advance it.
+ * Return them in "*argvars[MAX_FUNC_ARGS + 1]" and the count in "argcount".
+ * On failure FAIL is returned but the "argvars[argcount]" are still set.
+ */
+    int
+get_func_arguments(
+	char_u	    **arg,
+	evalarg_T   *evalarg,
+	int	    partial_argc,
+	typval_T    *argvars,
+	int	    *argcount)
+{
+    char_u	*argp = *arg;
+    int		ret = OK;
+    int		vim9script = in_vim9script();
+    int		evaluate = evalarg == NULL
+			       ? FALSE : (evalarg->eval_flags & EVAL_EVALUATE);
+
+    while (*argcount < MAX_FUNC_ARGS - partial_argc)
+    {
+	// skip the '(' or ',' and possibly line breaks
+	argp = skipwhite_and_linebreak(argp + 1, evalarg);
+
+	if (*argp == ')' || *argp == ',' || *argp == NUL)
+	    break;
+	if (eval1(&argp, &argvars[*argcount], evalarg) == FAIL)
+	{
+	    ret = FAIL;
+	    break;
+	}
+	++*argcount;
+	// The comma should come right after the argument, but this wasn't
+	// checked previously, thus only enforce it in Vim9 script.
+	if (vim9script)
+	{
+	    if (*argp != ',' && *skipwhite(argp) == ',')
+	    {
+		if (evaluate)
+		    semsg(_(e_no_white_space_allowed_before_str_str),
+								    ",", argp);
+		ret = FAIL;
+		break;
+	    }
+	}
+	else
+	    argp = skipwhite(argp);
+	if (*argp != ',')
+	    break;
+	if (vim9script && !IS_WHITE_OR_NUL(argp[1]))
+	{
+	    if (evaluate)
+		semsg(_(e_white_space_required_after_str_str), ",", argp);
+	    ret = FAIL;
+	    break;
+	}
+    }
+
+    argp = skipwhite_and_linebreak(argp, evalarg);
+    if (*argp == ')')
+	++argp;
+    else
+	ret = FAIL;
+    *arg = argp;
+    return ret;
+}
+
+/*
+ * Call a function and put the result in "rettv".
+ * Return OK or FAIL.
+ */
+    int
+get_func_tv(
+    char_u	*name,		// name of the function
+    int		len,		// length of "name" or -1 to use strlen()
+    typval_T	*rettv,
+    char_u	**arg,		// argument, pointing to the '('
+    evalarg_T	*evalarg,	// for line continuation
+    funcexe_T	*funcexe)	// various values
+{
+    char_u	*argp;
+    int		ret;
+    typval_T	argvars[MAX_FUNC_ARGS + 1];	// vars for arguments
+    int		argcount = 0;			// number of arguments found
+    int		vim9script = in_vim9script();
+    int		evaluate = evalarg == NULL
+			       ? FALSE : (evalarg->eval_flags & EVAL_EVALUATE);
+
+    argp = *arg;
+    ret = get_func_arguments(&argp, evalarg,
+	    (funcexe->fe_partial == NULL ? 0 : funcexe->fe_partial->pt_argc),
+							   argvars, &argcount);
+
+    if (ret == OK)
+    {
+	int	i = 0;
+	int	did_emsg_before = did_emsg;
+
+	if (get_vim_var_nr(VV_TESTING))
+	{
+	    // Prepare for calling test_garbagecollect_now(), need to know
+	    // what variables are used on the call stack.
+	    if (funcargs.ga_itemsize == 0)
+		ga_init2(&funcargs, sizeof(typval_T *), 50);
+	    for (i = 0; i < argcount; ++i)
+		if (ga_grow(&funcargs, 1) == OK)
+		    ((typval_T **)funcargs.ga_data)[funcargs.ga_len++] =
+								  &argvars[i];
+	}
+
+	ret = call_func(name, len, rettv, argcount, argvars, funcexe);
+	if (vim9script && did_emsg > did_emsg_before)
+	{
+	    // An error in a builtin function does not return FAIL, but we do
+	    // want to abort further processing if an error was given.
+	    ret = FAIL;
+	    clear_tv(rettv);
+	}
+
+	funcargs.ga_len -= i;
+    }
+    else if (!aborting() && evaluate)
+    {
+	if (argcount == MAX_FUNC_ARGS)
+	    emsg_funcname(e_too_many_arguments_for_function_str_2, name);
+	else
+	    emsg_funcname(e_invalid_arguments_for_function_str, name);
+    }
+
+    while (--argcount >= 0)
+	clear_tv(&argvars[argcount]);
+
+    if (vim9script)
+	*arg = argp;
+    else
+	*arg = skipwhite(argp);
+    return ret;
+}
+
+/*
+ * Return TRUE if "p" starts with "<SID>" or "s:".
+ * Only works if eval_fname_script() returned non-zero for "p"!
+ */
+    static int
+eval_fname_sid(char_u *p)
+{
+    return (*p == 's' || TOUPPER_ASC(p[2]) == 'I');
+}
+
+/*
+ * In a script change <SID>name() and s:name() to K_SNR 123_name().
+ * Change <SNR>123_name() to K_SNR 123_name().
+ * Use "fname_buf[FLEN_FIXED + 1]" when it fits, otherwise allocate memory
+ * and set "tofree".
+ */
+    char_u *
+fname_trans_sid(
+	char_u	    *name,
+	char_u	    *fname_buf,
+	char_u	    **tofree,
+	funcerror_T *error)
+{
+    int		llen;
+    char_u	*fname;
+    int		i;
+
+    llen = eval_fname_script(name);
+    if (llen == 0)
+	return name;  // no prefix
+
+    fname_buf[0] = K_SPECIAL;
+    fname_buf[1] = KS_EXTRA;
+    fname_buf[2] = (int)KE_SNR;
+    i = 3;
+    if (eval_fname_sid(name))	// "<SID>" or "s:"
+    {
+	if (current_sctx.sc_sid <= 0)
+	    *error = FCERR_SCRIPT;
+	else
+	{
+	    sprintf((char *)fname_buf + 3, "%ld_",
+						(long)current_sctx.sc_sid);
+	    i = (int)STRLEN(fname_buf);
+	}
+    }
+    if (i + STRLEN(name + llen) < FLEN_FIXED)
+    {
+	STRCPY(fname_buf + i, name + llen);
+	fname = fname_buf;
+    }
+    else
+    {
+	fname = alloc(i + STRLEN(name + llen) + 1);
+	if (fname == NULL)
+	    *error = FCERR_OTHER;
+	else
+	{
+	    *tofree = fname;
+	    mch_memmove(fname, fname_buf, (size_t)i);
+	    STRCPY(fname + i, name + llen);
+	}
+    }
+    return fname;
+}
+
+/*
+ * Concatenate the script ID and function name into  "<SNR>99_name".
+ * "buffer" must have size MAX_FUNC_NAME_LEN.
+ */
+    void
+func_name_with_sid(char_u *name, int sid, char_u *buffer)
+{
+    // A script-local function is stored as "<SNR>99_name".
+    buffer[0] = K_SPECIAL;
+    buffer[1] = KS_EXTRA;
+    buffer[2] = (int)KE_SNR;
+    vim_snprintf((char *)buffer + 3, MAX_FUNC_NAME_LEN - 3, "%ld_%s",
+							      (long)sid, name);
+}
+
+/*
+ * Find a function "name" in script "sid".
+ */
+    static ufunc_T *
+find_func_with_sid(char_u *name, int sid)
+{
+    hashitem_T	    *hi;
+    char_u	    buffer[MAX_FUNC_NAME_LEN];
+
+    if (!SCRIPT_ID_VALID(sid))
+	return NULL;	// not in a script
+
+    func_name_with_sid(name, sid, buffer);
+    hi = hash_find(&func_hashtab, buffer);
+    if (!HASHITEM_EMPTY(hi))
+	return HI2UF(hi);
+    return NULL;
+}
+
+/*
+ * Find a function "name" in script "sid" prefixing the autoload prefix.
+ */
+    static ufunc_T *
+find_func_with_prefix(char_u *name, int sid)
+{
+    hashitem_T	    *hi;
+    char_u	    buffer[MAX_FUNC_NAME_LEN];
+    scriptitem_T    *si;
+
+    if (vim_strchr(name, AUTOLOAD_CHAR) != NULL)
+	return NULL;	// already has the prefix
+    if (!SCRIPT_ID_VALID(sid))
+	return NULL;	// not in a script
+    si = SCRIPT_ITEM(sid);
+    if (si->sn_autoload_prefix != NULL)
+    {
+	size_t	len = STRLEN(si->sn_autoload_prefix) + STRLEN(name) + 1;
+	char_u	*auto_name;
+	char_u	*namep;
+
+	// skip a "<SNR>99_" prefix
+	namep = untrans_function_name(name);
+	if (namep == NULL)
+	    namep = name;
+
+	// An exported function in an autoload script is stored as
+	// "dir#path#name".
+	if (len < sizeof(buffer))
+	    auto_name = buffer;
+	else
+	    auto_name = alloc(len);
+	if (auto_name != NULL)
+	{
+	    vim_snprintf((char *)auto_name, len, "%s%s",
+						si->sn_autoload_prefix, namep);
+	    hi = hash_find(&func_hashtab, auto_name);
+	    if (auto_name != buffer)
+		vim_free(auto_name);
+	    if (!HASHITEM_EMPTY(hi))
+		return HI2UF(hi);
+	}
+    }
+
+    return NULL;
+}
+
+/*
+ * Find a function by name, return pointer to it in ufuncs.
+ * When "flags" has FFED_IS_GLOBAL don't find script-local or imported
+ * functions.
+ * When "flags" has "FFED_NO_GLOBAL" don't find global functions.
+ * Return NULL for unknown function.
+ */
+    ufunc_T *
+find_func_even_dead(char_u *name, int flags)
+{
+    hashitem_T	*hi;
+    ufunc_T	*func;
+
+    if ((flags & FFED_IS_GLOBAL) == 0)
+    {
+	// Find script-local function before global one.
+	if (in_vim9script() && eval_isnamec1(*name)
+					   && (name[1] != ':' || *name == 's'))
+	{
+	    func = find_func_with_sid(name[0] == 's' && name[1] == ':'
+				       ? name + 2 : name, current_sctx.sc_sid);
+	    if (func != NULL)
+		return func;
+	}
+	if (in_vim9script() && STRNCMP(name, "<SNR>", 5) == 0)
+	{
+	    char_u  *p = name + 5;
+	    long    sid;
+
+	    // printable "<SNR>123_Name" form
+	    sid = getdigits(&p);
+	    if (*p == '_')
+	    {
+		func = find_func_with_sid(p + 1, (int)sid);
+		if (func != NULL)
+		    return func;
+	    }
+	}
+    }
+
+    if ((flags & FFED_NO_GLOBAL) == 0)
+    {
+	hi = hash_find(&func_hashtab,
+				STRNCMP(name, "g:", 2) == 0 ? name + 2 : name);
+	if (!HASHITEM_EMPTY(hi))
+	    return HI2UF(hi);
+    }
+
+    // Find autoload function if this is an autoload script.
+    return find_func_with_prefix(name[0] == 's' && name[1] == ':'
+				       ? name + 2 : name, current_sctx.sc_sid);
+}
+
+/*
+ * Find a function by name, return pointer to it in ufuncs.
+ * "cctx" is passed in a :def function to find imported functions.
+ * Return NULL for unknown or dead function.
+ */
+    ufunc_T *
+find_func(char_u *name, int is_global)
+{
+    ufunc_T	*fp = find_func_even_dead(name, is_global ? FFED_IS_GLOBAL : 0);
+
+    if (fp != NULL && (fp->uf_flags & FC_DEAD) == 0)
+	return fp;
+    return NULL;
+}
+
+/*
+ * Return TRUE if "ufunc" is a global function.
+ */
+    int
+func_is_global(ufunc_T *ufunc)
+{
+    return ufunc->uf_name[0] != K_SPECIAL;
+}
+
+/*
+ * Return TRUE if "ufunc" must be called with a g: prefix in Vim9 script.
+ */
+    int
+func_requires_g_prefix(ufunc_T *ufunc)
+{
+    return ufunc->uf_name[0] != K_SPECIAL
+	    && (ufunc->uf_flags & FC_LAMBDA) == 0
+	    && vim_strchr(ufunc->uf_name, AUTOLOAD_CHAR) == NULL
+	    && !isdigit(ufunc->uf_name[0]);
+}
+
+/*
+ * Copy the function name of "fp" to buffer "buf".
+ * "buf" must be able to hold the function name plus three bytes.
+ * Takes care of script-local function names.
+ */
+    static void
+cat_func_name(char_u *buf, ufunc_T *fp)
+{
+    if (!func_is_global(fp))
+    {
+	STRCPY(buf, "<SNR>");
+	STRCAT(buf, fp->uf_name + 3);
+    }
+    else
+	STRCPY(buf, fp->uf_name);
+}
+
+/*
+ * Add a number variable "name" to dict "dp" with value "nr".
+ */
+    static void
+add_nr_var(
+    dict_T	*dp,
+    dictitem_T	*v,
+    char	*name,
+    varnumber_T nr)
+{
+    STRCPY(v->di_key, name);
+    v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
+    hash_add(&dp->dv_hashtab, DI2HIKEY(v), "add variable");
+    v->di_tv.v_type = VAR_NUMBER;
+    v->di_tv.v_lock = VAR_FIXED;
+    v->di_tv.vval.v_number = nr;
+}
+
+/*
+ * Free "fc".
+ */
+    static void
+free_funccal(funccall_T *fc)
+{
+    int	i;
+
+    for (i = 0; i < fc->fc_ufuncs.ga_len; ++i)
+    {
+	ufunc_T *fp = ((ufunc_T **)(fc->fc_ufuncs.ga_data))[i];
+
+	// When garbage collecting a funccall_T may be freed before the
+	// function that references it, clear its uf_scoped field.
+	// The function may have been redefined and point to another
+	// funccall_T, don't clear it then.
+	if (fp != NULL && fp->uf_scoped == fc)
+	    fp->uf_scoped = NULL;
+    }
+    ga_clear(&fc->fc_ufuncs);
+
+    func_ptr_unref(fc->fc_func);
+    vim_free(fc);
+}
+
+/*
+ * Free "fc" and what it contains.
+ * Can be called only when "fc" is kept beyond the period of it called,
+ * i.e. after cleanup_function_call(fc).
+ */
+   static void
+free_funccal_contents(funccall_T *fc)
+{
+    listitem_T	*li;
+
+    // Free all l: variables.
+    vars_clear(&fc->fc_l_vars.dv_hashtab);
+
+    // Free all a: variables.
+    vars_clear(&fc->fc_l_avars.dv_hashtab);
+
+    // Free the a:000 variables.
+    FOR_ALL_LIST_ITEMS(&fc->fc_l_varlist, li)
+	clear_tv(&li->li_tv);
+
+    free_funccal(fc);
+}
+
+/*
+ * Handle the last part of returning from a function: free the local hashtable.
+ * Unless it is still in use by a closure.
+ */
+    static void
+cleanup_function_call(funccall_T *fc)
+{
+    int	may_free_fc = fc->fc_refcount <= 0;
+    int	free_fc = TRUE;
+
+    current_funccal = fc->fc_caller;
+
+    // Free all l: variables if not referred.
+    if (may_free_fc && fc->fc_l_vars.dv_refcount == DO_NOT_FREE_CNT)
+	vars_clear(&fc->fc_l_vars.dv_hashtab);
+    else
+	free_fc = FALSE;
+
+    // If the a:000 list and the l: and a: dicts are not referenced and
+    // there is no closure using it, we can free the funccall_T and what's
+    // in it.
+    if (may_free_fc && fc->fc_l_avars.dv_refcount == DO_NOT_FREE_CNT)
+	vars_clear_ext(&fc->fc_l_avars.dv_hashtab, FALSE);
+    else
+    {
+	int	    todo;
+	hashitem_T  *hi;
+	dictitem_T  *di;
+
+	free_fc = FALSE;
+
+	// Make a copy of the a: variables, since we didn't do that above.
+	todo = (int)fc->fc_l_avars.dv_hashtab.ht_used;
+	for (hi = fc->fc_l_avars.dv_hashtab.ht_array; todo > 0; ++hi)
+	{
+	    if (!HASHITEM_EMPTY(hi))
+	    {
+		--todo;
+		di = HI2DI(hi);
+		copy_tv(&di->di_tv, &di->di_tv);
+	    }
+	}
+    }
+
+    if (may_free_fc && fc->fc_l_varlist.lv_refcount == DO_NOT_FREE_CNT)
+	fc->fc_l_varlist.lv_first = NULL;
+    else
+    {
+	listitem_T *li;
+
+	free_fc = FALSE;
+
+	// Make a copy of the a:000 items, since we didn't do that above.
+	FOR_ALL_LIST_ITEMS(&fc->fc_l_varlist, li)
+	    copy_tv(&li->li_tv, &li->li_tv);
+    }
+
+    if (free_fc)
+	free_funccal(fc);
+    else
+    {
+	static int made_copy = 0;
+
+	// "fc" is still in use.  This can happen when returning "a:000",
+	// assigning "l:" to a global variable or defining a closure.
+	// Link "fc" in the list for garbage collection later.
+	fc->fc_caller = previous_funccal;
+	previous_funccal = fc;
+
+	if (want_garbage_collect)
+	    // If garbage collector is ready, clear count.
+	    made_copy = 0;
+	else if (++made_copy >= (int)((4096 * 1024) / sizeof(*fc)))
+	{
+	    // We have made a lot of copies, worth 4 Mbyte.  This can happen
+	    // when repetitively calling a function that creates a reference to
+	    // itself somehow.  Call the garbage collector soon to avoid using
+	    // too much memory.
+	    made_copy = 0;
+	    want_garbage_collect = TRUE;
+	}
+    }
+}
+
+/*
+ * Return TRUE if "name" is a numbered function, ignoring a "g:" prefix.
+ */
+    static int
+numbered_function(char_u *name)
+{
+    return isdigit(*name)
+	    || (name[0] == 'g' && name[1] == ':' && isdigit(name[2]));
+}
+
+/*
+ * There are two kinds of function names:
+ * 1. ordinary names, function defined with :function or :def;
+ *    can start with "<SNR>123_" literally or with K_SPECIAL.
+ * 2. Numbered functions and lambdas: "<lambda>123"
+ * For the first we only count the name stored in func_hashtab as a reference,
+ * using function() does not count as a reference, because the function is
+ * looked up by name.
+ */
+    int
+func_name_refcount(char_u *name)
+{
+    return numbered_function(name) || (name[0] == '<' && name[1] == 'l');
+}
+
+/*
+ * Unreference "fc": decrement the reference count and free it when it
+ * becomes zero.  "fp" is detached from "fc".
+ * When "force" is TRUE we are exiting.
+ */
+    static void
+funccal_unref(funccall_T *fc, ufunc_T *fp, int force)
+{
+    funccall_T	**pfc;
+    int		i;
+
+    if (fc == NULL)
+	return;
+
+    if (--fc->fc_refcount <= 0 && (force || (
+		fc->fc_l_varlist.lv_refcount == DO_NOT_FREE_CNT
+		&& fc->fc_l_vars.dv_refcount == DO_NOT_FREE_CNT
+		&& fc->fc_l_avars.dv_refcount == DO_NOT_FREE_CNT)))
+	for (pfc = &previous_funccal; *pfc != NULL; pfc = &(*pfc)->fc_caller)
+	{
+	    if (fc == *pfc)
+	    {
+		*pfc = fc->fc_caller;
+		free_funccal_contents(fc);
+		return;
+	    }
+	}
+    for (i = 0; i < fc->fc_ufuncs.ga_len; ++i)
+	if (((ufunc_T **)(fc->fc_ufuncs.ga_data))[i] == fp)
+	    ((ufunc_T **)(fc->fc_ufuncs.ga_data))[i] = NULL;
+}
+
+/*
+ * Remove the function from the function hashtable.  If the function was
+ * deleted while it still has references this was already done.
+ * Return TRUE if the entry was deleted, FALSE if it wasn't found.
+ */
+    static int
+func_remove(ufunc_T *fp)
+{
+    hashitem_T	*hi;
+
+    // Return if it was already virtually deleted.
+    if (fp->uf_flags & FC_DEAD)
+	return FALSE;
+
+    hi = hash_find(&func_hashtab, UF2HIKEY(fp));
+    if (HASHITEM_EMPTY(hi))
+	return FALSE;
+
+    // When there is a def-function index do not actually remove the
+    // function, so we can find the index when defining the function again.
+    // Do remove it when it's a copy.
+    if (fp->uf_def_status == UF_COMPILED && (fp->uf_flags & FC_COPY) == 0)
+    {
+	fp->uf_flags |= FC_DEAD;
+	return FALSE;
+    }
+    hash_remove(&func_hashtab, hi, "remove function");
+    fp->uf_flags |= FC_DELETED;
+    return TRUE;
+}
+
+    static void
+func_clear_items(ufunc_T *fp)
+{
+    ga_clear_strings(&(fp->uf_args));
+    ga_clear_strings(&(fp->uf_def_args));
+    ga_clear_strings(&(fp->uf_lines));
+    VIM_CLEAR(fp->uf_arg_types);
+    VIM_CLEAR(fp->uf_block_ids);
+    VIM_CLEAR(fp->uf_va_name);
+    clear_type_list(&fp->uf_type_list);
+
+    // Increment the refcount of this function to avoid it being freed
+    // recursively when the partial is freed.
+    fp->uf_refcount += 3;
+    partial_unref(fp->uf_partial);
+    fp->uf_partial = NULL;
+    fp->uf_refcount -= 3;
+
+#ifdef FEAT_LUA
+    if (fp->uf_cb_free != NULL)
+    {
+	fp->uf_cb_free(fp->uf_cb_state);
+	fp->uf_cb_free = NULL;
+    }
+
+    fp->uf_cb_state = NULL;
+    fp->uf_cb = NULL;
+#endif
+#ifdef FEAT_PROFILE
+    VIM_CLEAR(fp->uf_tml_count);
+    VIM_CLEAR(fp->uf_tml_total);
+    VIM_CLEAR(fp->uf_tml_self);
+#endif
+}
+
+/*
+ * Free all things that a function contains.  Does not free the function
+ * itself, use func_free() for that.
+ * When "force" is TRUE we are exiting.
+ */
+    static void
+func_clear(ufunc_T *fp, int force)
+{
+    if (fp->uf_cleared)
+	return;
+    fp->uf_cleared = TRUE;
+
+    // clear this function
+    func_clear_items(fp);
+    funccal_unref(fp->uf_scoped, fp, force);
+    unlink_def_function(fp);
+}
+
+/*
+ * Free a function and remove it from the list of functions.  Does not free
+ * what a function contains, call func_clear() first.
+ * When "force" is TRUE we are exiting.
+ * Returns OK when the function was actually freed.
+ */
+    static int
+func_free(ufunc_T *fp, int force)
+{
+    // Only remove it when not done already, otherwise we would remove a newer
+    // version of the function with the same name.
+    if ((fp->uf_flags & (FC_DELETED | FC_REMOVED)) == 0)
+	func_remove(fp);
+
+    if ((fp->uf_flags & FC_DEAD) == 0 || force)
+    {
+	if (fp->uf_dfunc_idx > 0)
+	    unlink_def_function(fp);
+	VIM_CLEAR(fp->uf_name_exp);
+	vim_free(fp);
+	return OK;
+    }
+    return FAIL;
+}
+
+/*
+ * Free all things that a function contains and free the function itself.
+ * When "force" is TRUE we are exiting.
+ */
+    void
+func_clear_free(ufunc_T *fp, int force)
+{
+    func_clear(fp, force);
+    if (force || fp->uf_dfunc_idx == 0 || func_name_refcount(fp->uf_name)
+						   || (fp->uf_flags & FC_COPY))
+	func_free(fp, force);
+    else
+	fp->uf_flags |= FC_DEAD;
+}
+
+/*
+ * Copy already defined function "lambda" to a new function with name "global".
+ * This is for when a compiled function defines a global function.
+ */
+    int
+copy_lambda_to_global_func(
+	char_u		*lambda,
+	char_u		*global,
+	loopvarinfo_T	*loopvarinfo,
+	ectx_T		*ectx)
+{
+    ufunc_T *ufunc = find_func_even_dead(lambda, FFED_IS_GLOBAL);
+    ufunc_T *fp = NULL;
+
+    if (ufunc == NULL)
+    {
+	semsg(_(e_lambda_function_not_found_str), lambda);
+	return FAIL;
+    }
+
+    fp = find_func(global, TRUE);
+    if (fp != NULL)
+    {
+	// TODO: handle ! to overwrite
+	semsg(_(e_function_str_already_exists_add_bang_to_replace), global);
+	return FAIL;
+    }
+
+    fp = alloc_ufunc(global);
+    if (fp == NULL)
+	return FAIL;
+
+    fp->uf_varargs = ufunc->uf_varargs;
+    fp->uf_flags = (ufunc->uf_flags & ~FC_VIM9) | FC_COPY;
+    fp->uf_def_status = ufunc->uf_def_status;
+    fp->uf_dfunc_idx = ufunc->uf_dfunc_idx;
+    if (ga_copy_strings(&ufunc->uf_args, &fp->uf_args) == FAIL
+	    || ga_copy_strings(&ufunc->uf_def_args, &fp->uf_def_args)
+								    == FAIL
+	    || ga_copy_strings(&ufunc->uf_lines, &fp->uf_lines) == FAIL)
+	goto failed;
+
+    if (ufunc->uf_arg_types != NULL)
+    {
+	fp->uf_arg_types = ALLOC_MULT(type_T *, fp->uf_args.ga_len);
+	if (fp->uf_arg_types == NULL)
+	    goto failed;
+	mch_memmove(fp->uf_arg_types, ufunc->uf_arg_types,
+				    sizeof(type_T *) * fp->uf_args.ga_len);
+    }
+    if (ufunc->uf_va_name != NULL)
+    {
+	fp->uf_va_name = vim_strsave(ufunc->uf_va_name);
+	if (fp->uf_va_name == NULL)
+	    goto failed;
+    }
+    fp->uf_ret_type = ufunc->uf_ret_type;
+
+    fp->uf_refcount = 1;
+
+    fp->uf_name_exp = NULL;
+    set_ufunc_name(fp, global);
+
+    hash_add(&func_hashtab, UF2HIKEY(fp), "copy lambda");
+
+    // the referenced dfunc_T is now used one more time
+    link_def_function(fp);
+
+    // Create a partial to store the context of the function where it was
+    // instantiated.  Only needs to be done once.  Do this on the original
+    // function, "dfunc->df_ufunc" will point to it.
+    if ((ufunc->uf_flags & FC_CLOSURE) && ufunc->uf_partial == NULL)
+    {
+	partial_T   *pt = ALLOC_CLEAR_ONE(partial_T);
+
+	if (pt == NULL)
+	    goto failed;
+	if (fill_partial_and_closure(pt, ufunc, loopvarinfo, ectx) == FAIL)
+	{
+	    vim_free(pt);
+	    goto failed;
+	}
+	ufunc->uf_partial = pt;
+    }
+
+    return OK;
+
+failed:
+    func_clear_free(fp, TRUE);
+    return FAIL;
+}
+
+static int	funcdepth = 0;
+
+/*
+ * Increment the function call depth count.
+ * Return FAIL when going over 'maxfuncdepth'.
+ * Otherwise return OK, must call funcdepth_decrement() later!
+ */
+    int
+funcdepth_increment(void)
+{
+    if (funcdepth >= p_mfd)
+    {
+	emsg(_(e_function_call_depth_is_higher_than_macfuncdepth));
+	return FAIL;
+    }
+    ++funcdepth;
+    return OK;
+}
+
+    void
+funcdepth_decrement(void)
+{
+    --funcdepth;
+}
+
+/*
+ * Get the current function call depth.
+ */
+    int
+funcdepth_get(void)
+{
+    return funcdepth;
+}
+
+/*
+ * Restore the function call depth.  This is for cases where there is no
+ * guarantee funcdepth_decrement() can be called exactly the same number of
+ * times as funcdepth_increment().
+ */
+    void
+funcdepth_restore(int depth)
+{
+    funcdepth = depth;
+}
+
+/*
+ * Allocate a funccall_T, link it in current_funccal and fill in "fp" and
+ * "rettv".
+ * Must be followed by one call to remove_funccal() or cleanup_function_call().
+ * Returns NULL when allocation fails.
+ */
+    funccall_T *
+create_funccal(ufunc_T *fp, typval_T *rettv)
+{
+    funccall_T *fc = ALLOC_CLEAR_ONE(funccall_T);
+
+    if (fc == NULL)
+	return NULL;
+    fc->fc_caller = current_funccal;
+    current_funccal = fc;
+    fc->fc_func = fp;
+    func_ptr_ref(fp);
+    fc->fc_rettv = rettv;
+    return fc;
+}
+
+/*
+ * To be called when returning from a compiled function; restores
+ * current_funccal.
+ */
+    void
+remove_funccal(void)
+{
+    funccall_T *fc = current_funccal;
+
+    current_funccal = fc->fc_caller;
+    free_funccal(fc);
+}
+
+/*
+ * Call a user function.
+ */
+    static funcerror_T
+call_user_func(
+    ufunc_T	*fp,		// pointer to function
+    int		argcount,	// nr of args
+    typval_T	*argvars,	// arguments
+    typval_T	*rettv,		// return value
+    funcexe_T	*funcexe,	// context
+    dict_T	*selfdict)	// Dictionary for "self"
+{
+    sctx_T	save_current_sctx;
+    ectx_T	*save_current_ectx;
+    int		using_sandbox = FALSE;
+    int		save_sticky_cmdmod_flags = sticky_cmdmod_flags;
+    funccall_T	*fc;
+    int		save_did_emsg;
+    funcerror_T retval = FCERR_NONE;
+    int		default_arg_err = FALSE;
+    dictitem_T	*v;
+    int		fixvar_idx = 0;	// index in fc_fixvar[]
+    int		i;
+    int		ai;
+    int		islambda = FALSE;
+    char_u	numbuf[NUMBUFLEN];
+    char_u	*name;
+    typval_T	*tv_to_free[MAX_FUNC_ARGS];
+    int		tv_to_free_len = 0;
+#ifdef FEAT_PROFILE
+    profinfo_T	profile_info;
+#endif
+    ESTACK_CHECK_DECLARATION
+
+#ifdef FEAT_PROFILE
+    CLEAR_FIELD(profile_info);
+#endif
+
+    // If depth of calling is getting too high, don't execute the function.
+    if (funcdepth_increment() == FAIL)
+    {
+	rettv->v_type = VAR_NUMBER;
+	rettv->vval.v_number = -1;
+	return FCERR_FAILED;
+    }
+
+    line_breakcheck();		// check for CTRL-C hit
+
+    fc = create_funccal(fp, rettv);
+    if (fc == NULL)
+	return FCERR_OTHER;
+    fc->fc_level = ex_nesting_level;
+    // Check if this function has a breakpoint.
+    fc->fc_breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name, (linenr_T)0);
+    fc->fc_dbg_tick = debug_tick;
+    // Set up fields for closure.
+    ga_init2(&fc->fc_ufuncs, sizeof(ufunc_T *), 1);
+
+    if (fp->uf_def_status != UF_NOT_COMPILED)
+    {
+#ifdef FEAT_PROFILE
+	ufunc_T *caller = fc->fc_caller == NULL ? NULL : fc->fc_caller->fc_func;
+#endif
+	// Execute the function, possibly compiling it first.
+#ifdef FEAT_PROFILE
+	if (do_profiling == PROF_YES)
+	    profile_may_start_func(&profile_info, fp, caller);
+#endif
+	sticky_cmdmod_flags = 0;
+	if (call_def_function(fp, argcount, argvars, 0,
+		   funcexe->fe_partial, funcexe->fe_object, fc, rettv) == FAIL)
+	    retval = FCERR_FAILED;
+	funcdepth_decrement();
+#ifdef FEAT_PROFILE
+	if (do_profiling == PROF_YES && (fp->uf_profiling
+				  || (caller != NULL && caller->uf_profiling)))
+	    profile_may_end_func(&profile_info, fp, caller);
+#endif
+	remove_funccal();
+	sticky_cmdmod_flags = save_sticky_cmdmod_flags;
+	return retval;
+    }
+
+    islambda = fp->uf_flags & FC_LAMBDA;
+
+    /*
+     * Note about using fc->fc_fixvar[]: This is an array of FIXVAR_CNT
+     * variables with names up to VAR_SHORT_LEN long.  This avoids having to
+     * alloc/free each argument variable and saves a lot of time.
+     */
+    /*
+     * Init l: variables.
+     */
+    init_var_dict(&fc->fc_l_vars, &fc->fc_l_vars_var, VAR_DEF_SCOPE);
+    if (selfdict != NULL)
+    {
+	// Set l:self to "selfdict".  Use "name" to avoid a warning from
+	// some compiler that checks the destination size.
+	v = &fc->fc_fixvar[fixvar_idx++].var;
+	name = v->di_key;
+	STRCPY(name, "self");
+	v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
+	hash_add(&fc->fc_l_vars.dv_hashtab, DI2HIKEY(v), "set self dictionary");
+	v->di_tv.v_type = VAR_DICT;
+	v->di_tv.v_lock = 0;
+	v->di_tv.vval.v_dict = selfdict;
+	++selfdict->dv_refcount;
+    }
+
+    /*
+     * Init a: variables, unless none found (in lambda).
+     * Set a:0 to "argcount" less number of named arguments, if >= 0.
+     * Set a:000 to a list with room for the "..." arguments.
+     */
+    init_var_dict(&fc->fc_l_avars, &fc->fc_l_avars_var, VAR_SCOPE);
+    if ((fp->uf_flags & FC_NOARGS) == 0)
+	add_nr_var(&fc->fc_l_avars, &fc->fc_fixvar[fixvar_idx++].var, "0",
+				(varnumber_T)(argcount >= fp->uf_args.ga_len
+				    ? argcount - fp->uf_args.ga_len : 0));
+    fc->fc_l_avars.dv_lock = VAR_FIXED;
+    if ((fp->uf_flags & FC_NOARGS) == 0)
+    {
+	// Use "name" to avoid a warning from some compiler that checks the
+	// destination size.
+	v = &fc->fc_fixvar[fixvar_idx++].var;
+	name = v->di_key;
+	STRCPY(name, "000");
+	v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
+	hash_add(&fc->fc_l_avars.dv_hashtab, DI2HIKEY(v), "function argument");
+	v->di_tv.v_type = VAR_LIST;
+	v->di_tv.v_lock = VAR_FIXED;
+	v->di_tv.vval.v_list = &fc->fc_l_varlist;
+    }
+    CLEAR_FIELD(fc->fc_l_varlist);
+    fc->fc_l_varlist.lv_refcount = DO_NOT_FREE_CNT;
+    fc->fc_l_varlist.lv_lock = VAR_FIXED;
+
+    /*
+     * Set a:firstline to "firstline" and a:lastline to "lastline".
+     * Set a:name to named arguments.
+     * Set a:N to the "..." arguments.
+     * Skipped when no a: variables used (in lambda).
+     */
+    if ((fp->uf_flags & FC_NOARGS) == 0)
+    {
+	add_nr_var(&fc->fc_l_avars, &fc->fc_fixvar[fixvar_idx++].var,
+			      "firstline", (varnumber_T)funcexe->fe_firstline);
+	add_nr_var(&fc->fc_l_avars, &fc->fc_fixvar[fixvar_idx++].var,
+				"lastline", (varnumber_T)funcexe->fe_lastline);
+    }
+    for (i = 0; i < argcount || i < fp->uf_args.ga_len; ++i)
+    {
+	int	    addlocal = FALSE;
+	typval_T    def_rettv;
+	int	    isdefault = FALSE;
+
+	ai = i - fp->uf_args.ga_len;
+	if (ai < 0)
+	{
+	    // named argument a:name
+	    name = FUNCARG(fp, i);
+	    if (islambda)
+		addlocal = TRUE;
+
+	    // evaluate named argument default expression
+	    isdefault = ai + fp->uf_def_args.ga_len >= 0
+		       && (i >= argcount || (argvars[i].v_type == VAR_SPECIAL
+				   && argvars[i].vval.v_number == VVAL_NONE));
+	    if (isdefault)
+	    {
+		char_u	    *default_expr = NULL;
+
+		def_rettv.v_type = VAR_NUMBER;
+		def_rettv.vval.v_number = -1;
+
+		default_expr = ((char_u **)(fp->uf_def_args.ga_data))
+						 [ai + fp->uf_def_args.ga_len];
+		if (eval1(&default_expr, &def_rettv, &EVALARG_EVALUATE) == FAIL)
+		{
+		    default_arg_err = 1;
+		    break;
+		}
+	    }
+	}
+	else
+	{
+	    if ((fp->uf_flags & FC_NOARGS) != 0)
+		// Bail out if no a: arguments used (in lambda).
+		break;
+
+	    // "..." argument a:1, a:2, etc.
+	    sprintf((char *)numbuf, "%d", ai + 1);
+	    name = numbuf;
+	}
+	if (fixvar_idx < FIXVAR_CNT && STRLEN(name) <= VAR_SHORT_LEN)
+	{
+	    v = &fc->fc_fixvar[fixvar_idx++].var;
+	    v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
+	    STRCPY(v->di_key, name);
+	}
+	else
+	{
+	    v = dictitem_alloc(name);
+	    if (v == NULL)
+		break;
+	    v->di_flags |= DI_FLAGS_RO | DI_FLAGS_FIX;
+	}
+
+	// Note: the values are copied directly to avoid alloc/free.
+	// "argvars" must have VAR_FIXED for v_lock.
+	v->di_tv = isdefault ? def_rettv : argvars[i];
+	v->di_tv.v_lock = VAR_FIXED;
+
+	if (isdefault)
+	    // Need to free this later, no matter where it's stored.
+	    tv_to_free[tv_to_free_len++] = &v->di_tv;
+
+	if (addlocal)
+	{
+	    // Named arguments should be accessed without the "a:" prefix in
+	    // lambda expressions.  Add to the l: dict.
+	    copy_tv(&v->di_tv, &v->di_tv);
+	    hash_add(&fc->fc_l_vars.dv_hashtab, DI2HIKEY(v), "local variable");
+	}
+	else
+	    hash_add(&fc->fc_l_avars.dv_hashtab, DI2HIKEY(v), "add variable");
+
+	if (ai >= 0 && ai < MAX_FUNC_ARGS)
+	{
+	    listitem_T *li = &fc->fc_l_listitems[ai];
+
+	    li->li_tv = argvars[i];
+	    li->li_tv.v_lock = VAR_FIXED;
+	    list_append(&fc->fc_l_varlist, li);
+	}
+    }
+
+    // Don't redraw while executing the function.
+    ++RedrawingDisabled;
+
+    if (fp->uf_flags & FC_SANDBOX)
+    {
+	using_sandbox = TRUE;
+	++sandbox;
+    }
+
+    estack_push_ufunc(fp, 1);
+    ESTACK_CHECK_SETUP
+    if (p_verbose >= 12)
+    {
+	++no_wait_return;
+	verbose_enter_scroll();
+
+	smsg(_("calling %s"), SOURCING_NAME);
+	if (p_verbose >= 14)
+	{
+	    char_u	buf[MSG_BUF_LEN];
+	    char_u	numbuf2[NUMBUFLEN];
+	    char_u	*tofree;
+	    char_u	*s;
+
+	    msg_puts("(");
+	    for (i = 0; i < argcount; ++i)
+	    {
+		if (i > 0)
+		    msg_puts(", ");
+		if (argvars[i].v_type == VAR_NUMBER)
+		    msg_outnum((long)argvars[i].vval.v_number);
+		else
+		{
+		    // Do not want errors such as E724 here.
+		    ++emsg_off;
+		    s = tv2string(&argvars[i], &tofree, numbuf2, 0);
+		    --emsg_off;
+		    if (s != NULL)
+		    {
+			if (vim_strsize(s) > MSG_BUF_CLEN)
+			{
+			    trunc_string(s, buf, MSG_BUF_CLEN, MSG_BUF_LEN);
+			    s = buf;
+			}
+			msg_puts((char *)s);
+			vim_free(tofree);
+		    }
+		}
+	    }
+	    msg_puts(")");
+	}
+	msg_puts("\n");   // don't overwrite this either
+
+	verbose_leave_scroll();
+	--no_wait_return;
+    }
+#ifdef FEAT_PROFILE
+    if (do_profiling == PROF_YES)
+	profile_may_start_func(&profile_info, fp,
+			fc->fc_caller == NULL ? NULL : fc->fc_caller->fc_func);
+#endif
+
+    // "legacy" does not apply to commands in the function
+    sticky_cmdmod_flags = 0;
+
+    // If called from a compiled :def function the execution context must be
+    // hidden, any deferred functions need to be added to the function being
+    // executed here.
+    save_current_ectx = clear_current_ectx();
+
+    save_current_sctx = current_sctx;
+    current_sctx = fp->uf_script_ctx;
+    save_did_emsg = did_emsg;
+    did_emsg = FALSE;
+
+    if (default_arg_err && (fp->uf_flags & FC_ABORT))
+    {
+	did_emsg = TRUE;
+	retval = FCERR_FAILED;
+    }
+    else if (islambda)
+    {
+	char_u *p = *(char_u **)fp->uf_lines.ga_data + 7;
+
+	// A Lambda always has the command "return {expr}".  It is much faster
+	// to evaluate {expr} directly.
+	++ex_nesting_level;
+	(void)eval1(&p, rettv, &EVALARG_EVALUATE);
+	--ex_nesting_level;
+    }
+    else
+	// call do_cmdline() to execute the lines
+	do_cmdline(NULL, get_func_line, (void *)fc,
+				     DOCMD_NOWAIT|DOCMD_VERBOSE|DOCMD_REPEAT);
+
+    // Invoke functions added with ":defer".
+    handle_defer_one(current_funccal);
+
+    --RedrawingDisabled;
+
+    // when the function was aborted because of an error, return -1
+    if ((did_emsg && (fp->uf_flags & FC_ABORT)) || rettv->v_type == VAR_UNKNOWN)
+    {
+	clear_tv(rettv);
+	rettv->v_type = VAR_NUMBER;
+	rettv->vval.v_number = -1;
+
+	// In corner cases returning a "failed" value is not backwards
+	// compatible.  Only do this for Vim9 script.
+	if (in_vim9script())
+	    retval = FCERR_FAILED;
+    }
+
+#ifdef FEAT_PROFILE
+    if (do_profiling == PROF_YES)
+    {
+	ufunc_T *caller = fc->fc_caller == NULL ? NULL : fc->fc_caller->fc_func;
+
+	if (fp->uf_profiling || (caller != NULL && caller->uf_profiling))
+	    profile_may_end_func(&profile_info, fp, caller);
+    }
+#endif
+
+    // when being verbose, mention the return value
+    if (p_verbose >= 12)
+    {
+	++no_wait_return;
+	verbose_enter_scroll();
+
+	if (aborting())
+	    smsg(_("%s aborted"), SOURCING_NAME);
+	else if (fc->fc_rettv->v_type == VAR_NUMBER)
+	    smsg(_("%s returning #%ld"), SOURCING_NAME,
+					    (long)fc->fc_rettv->vval.v_number);
+	else
+	{
+	    char_u	buf[MSG_BUF_LEN];
+	    char_u	numbuf2[NUMBUFLEN];
+	    char_u	*tofree;
+	    char_u	*s;
+
+	    // The value may be very long.  Skip the middle part, so that we
+	    // have some idea how it starts and ends. smsg() would always
+	    // truncate it at the end. Don't want errors such as E724 here.
+	    ++emsg_off;
+	    s = tv2string(fc->fc_rettv, &tofree, numbuf2, 0);
+	    --emsg_off;
+	    if (s != NULL)
+	    {
+		if (vim_strsize(s) > MSG_BUF_CLEN)
+		{
+		    trunc_string(s, buf, MSG_BUF_CLEN, MSG_BUF_LEN);
+		    s = buf;
+		}
+		smsg(_("%s returning %s"), SOURCING_NAME, s);
+		vim_free(tofree);
+	    }
+	}
+	msg_puts("\n");   // don't overwrite this either
+
+	verbose_leave_scroll();
+	--no_wait_return;
+    }
+
+    ESTACK_CHECK_NOW
+    estack_pop();
+    current_sctx = save_current_sctx;
+    restore_current_ectx(save_current_ectx);
+
+#ifdef FEAT_PROFILE
+    if (do_profiling == PROF_YES)
+	script_prof_restore(&profile_info.pi_wait_start);
+#endif
+    if (using_sandbox)
+	--sandbox;
+    sticky_cmdmod_flags = save_sticky_cmdmod_flags;
+
+    if (p_verbose >= 12 && SOURCING_NAME != NULL)
+    {
+	++no_wait_return;
+	verbose_enter_scroll();
+
+	smsg(_("continuing in %s"), SOURCING_NAME);
+	msg_puts("\n");   // don't overwrite this either
+
+	verbose_leave_scroll();
+	--no_wait_return;
+    }
+
+    did_emsg |= save_did_emsg;
+    funcdepth_decrement();
+    for (i = 0; i < tv_to_free_len; ++i)
+	clear_tv(tv_to_free[i]);
+    cleanup_function_call(fc);
+
+    return retval;
+}
+
+/*
+ * Check the argument count for user function "fp".
+ * Return FCERR_UNKNOWN if OK, FCERR_TOOFEW or FCERR_TOOMANY otherwise.
+ */
+    funcerror_T
+check_user_func_argcount(ufunc_T *fp, int argcount)
+{
+    int regular_args = fp->uf_args.ga_len;
+
+    if (argcount < regular_args - fp->uf_def_args.ga_len)
+	return FCERR_TOOFEW;
+    else if (!has_varargs(fp) && argcount > regular_args)
+	return FCERR_TOOMANY;
+    return FCERR_UNKNOWN;
+}
+
+/*
+ * Call a user function after checking the arguments.
+ */
+    funcerror_T
+call_user_func_check(
+	ufunc_T	    *fp,
+	int	    argcount,
+	typval_T    *argvars,
+	typval_T    *rettv,
+	funcexe_T   *funcexe,
+	dict_T	    *selfdict)
+{
+    funcerror_T error = FCERR_NONE;
+
+#ifdef FEAT_LUA
+    if (fp->uf_flags & FC_CFUNC)
+    {
+	cfunc_T cb = fp->uf_cb;
+
+	return (*cb)(argcount, argvars, rettv, fp->uf_cb_state);
+    }
+#endif
+
+    if (fp->uf_flags & FC_RANGE && funcexe->fe_doesrange != NULL)
+	*funcexe->fe_doesrange = TRUE;
+    error = check_user_func_argcount(fp, argcount);
+    if (error != FCERR_UNKNOWN)
+	return error;
+
+    if ((fp->uf_flags & FC_DICT) && selfdict == NULL)
+    {
+	error = FCERR_DICT;
+    }
+    else
+    {
+	int		did_save_redo = FALSE;
+	save_redo_T	save_redo;
+
+	/*
+	 * Call the user function.
+	 * Save and restore search patterns, script variables and
+	 * redo buffer.
+	 */
+	save_search_patterns();
+	if (!ins_compl_active())
+	{
+	    saveRedobuff(&save_redo);
+	    did_save_redo = TRUE;
+	}
+	++fp->uf_calls;
+	error = call_user_func(fp, argcount, argvars, rettv, funcexe,
+				   (fp->uf_flags & FC_DICT) ? selfdict : NULL);
+	if (--fp->uf_calls <= 0 && fp->uf_refcount <= 0)
+	    // Function was unreferenced while being used, free it now.
+	    func_clear_free(fp, FALSE);
+	if (did_save_redo)
+	    restoreRedobuff(&save_redo);
+	restore_search_patterns();
+    }
+
+    return error;
+}
+
+static funccal_entry_T *funccal_stack = NULL;
+
+/*
+ * Save the current function call pointer, and set it to NULL.
+ * Used when executing autocommands and for ":source".
+ */
+    void
+save_funccal(funccal_entry_T *entry)
+{
+    entry->top_funccal = current_funccal;
+    entry->next = funccal_stack;
+    funccal_stack = entry;
+    current_funccal = NULL;
+}
+
+    void
+restore_funccal(void)
+{
+    if (funccal_stack == NULL)
+	iemsg("INTERNAL: restore_funccal()");
+    else
+    {
+	current_funccal = funccal_stack->top_funccal;
+	funccal_stack = funccal_stack->next;
+    }
+}
+
+    funccall_T *
+get_current_funccal(void)
+{
+    return current_funccal;
+}
+
+/*
+ * Return TRUE when currently at the script level:
+ * - not in a function
+ * - not executing an autocommand
+ * Note that when an autocommand sources a script the result is FALSE;
+ */
+    int
+at_script_level(void)
+{
+    return current_funccal == NULL && autocmd_match == NULL;
+}
+
+/*
+ * Mark all functions of script "sid" as deleted.
+ */
+    void
+delete_script_functions(int sid)
+{
+    hashitem_T	*hi;
+    ufunc_T	*fp;
+    long_u	todo = 1;
+    char_u	buf[30];
+    size_t	len;
+
+    buf[0] = K_SPECIAL;
+    buf[1] = KS_EXTRA;
+    buf[2] = (int)KE_SNR;
+    sprintf((char *)buf + 3, "%d_", sid);
+    len = STRLEN(buf);
+
+    while (todo > 0)
+    {
+	todo = func_hashtab.ht_used;
+	for (hi = func_hashtab.ht_array; todo > 0; ++hi)
+	    if (!HASHITEM_EMPTY(hi))
+	    {
+		fp = HI2UF(hi);
+		if (STRNCMP(fp->uf_name, buf, len) == 0)
+		{
+		    int changed = func_hashtab.ht_changed;
+
+		    fp->uf_flags |= FC_DEAD;
+
+		    if (fp->uf_calls > 0)
+		    {
+			// Function is executing, don't free it but do remove
+			// it from the hashtable.
+			if (func_remove(fp))
+			    fp->uf_refcount--;
+		    }
+		    else
+		    {
+			func_clear(fp, TRUE);
+			// When clearing a function another function can be
+			// cleared as a side effect.  When that happens start
+			// over.
+			if (changed != func_hashtab.ht_changed)
+			    break;
+		    }
+		}
+		--todo;
+	    }
+    }
+}
+
+#if defined(EXITFREE) || defined(PROTO)
+    void
+free_all_functions(void)
+{
+    hashitem_T	*hi;
+    ufunc_T	*fp;
+    long_u	skipped = 0;
+    long_u	todo = 1;
+    int		changed;
+
+    // Clean up the current_funccal chain and the funccal stack.
+    while (current_funccal != NULL)
+    {
+	clear_tv(current_funccal->fc_rettv);
+	cleanup_function_call(current_funccal);
+	if (current_funccal == NULL && funccal_stack != NULL)
+	    restore_funccal();
+    }
+
+    // First clear what the functions contain.  Since this may lower the
+    // reference count of a function, it may also free a function and change
+    // the hash table. Restart if that happens.
+    while (todo > 0)
+    {
+	todo = func_hashtab.ht_used;
+	for (hi = func_hashtab.ht_array; todo > 0; ++hi)
+	    if (!HASHITEM_EMPTY(hi))
+	    {
+		// clear the def function index now
+		fp = HI2UF(hi);
+		fp->uf_flags &= ~FC_DEAD;
+		fp->uf_def_status = UF_NOT_COMPILED;
+
+		// Only free functions that are not refcounted, those are
+		// supposed to be freed when no longer referenced.
+		if (func_name_refcount(fp->uf_name))
+		    ++skipped;
+		else
+		{
+		    changed = func_hashtab.ht_changed;
+		    func_clear(fp, TRUE);
+		    if (changed != func_hashtab.ht_changed)
+		    {
+			skipped = 0;
+			break;
+		    }
+		}
+		--todo;
+	    }
+    }
+
+    // Now actually free the functions.  Need to start all over every time,
+    // because func_free() may change the hash table.
+    skipped = 0;
+    while (func_hashtab.ht_used > skipped)
+    {
+	todo = func_hashtab.ht_used;
+	for (hi = func_hashtab.ht_array; todo > 0; ++hi)
+	    if (!HASHITEM_EMPTY(hi))
+	    {
+		--todo;
+		// Only free functions that are not refcounted, those are
+		// supposed to be freed when no longer referenced.
+		fp = HI2UF(hi);
+		if (func_name_refcount(fp->uf_name))
+		    ++skipped;
+		else
+		{
+		    if (func_free(fp, FALSE) == OK)
+		    {
+			skipped = 0;
+			break;
+		    }
+		    // did not actually free it
+		    ++skipped;
+		}
+	    }
+    }
+    if (skipped == 0)
+	hash_clear(&func_hashtab);
+
+    free_def_functions();
+}
+#endif
+
+/*
+ * Return TRUE if "name" looks like a builtin function name: starts with a
+ * lower case letter, doesn't contain AUTOLOAD_CHAR or ':', no "." after the
+ * name.
+ * "len" is the length of "name", or -1 for NUL terminated.
+ */
+    int
+builtin_function(char_u *name, int len)
+{
+    int i;
+
+    if (!ASCII_ISLOWER(name[0]) || name[1] == ':')
+	return FALSE;
+    for (i = 0; name[i] != NUL && (len < 0 || i < len); ++i)
+    {
+	if (name[i] == AUTOLOAD_CHAR)
+	    return FALSE;
+	if (!eval_isnamec(name[i]))
+	{
+	    // "name.something" is not a builtin function
+	    if (name[i] == '.')
+		return FALSE;
+	    break;
+	}
+    }
+    return TRUE;
+}
+
+    int
+func_call(
+    char_u	*name,
+    typval_T	*args,
+    partial_T	*partial,
+    dict_T	*selfdict,
+    typval_T	*rettv)
+{
+    list_T	*l = args->vval.v_list;
+    listitem_T	*item;
+    typval_T	argv[MAX_FUNC_ARGS + 1];
+    int		argc = 0;
+    int		r = 0;
+
+    CHECK_LIST_MATERIALIZE(l);
+    FOR_ALL_LIST_ITEMS(l, item)
+    {
+	if (argc == MAX_FUNC_ARGS - (partial == NULL ? 0 : partial->pt_argc))
+	{
+	    emsg(_(e_too_many_arguments));
+	    break;
+	}
+	// Make a copy of each argument.  This is needed to be able to set
+	// v_lock to VAR_FIXED in the copy without changing the original list.
+	copy_tv(&item->li_tv, &argv[argc++]);
+    }
+
+    if (item == NULL)
+    {
+	funcexe_T funcexe;
+
+	CLEAR_FIELD(funcexe);
+	funcexe.fe_firstline = curwin->w_cursor.lnum;
+	funcexe.fe_lastline = curwin->w_cursor.lnum;
+	funcexe.fe_evaluate = TRUE;
+	funcexe.fe_partial = partial;
+	funcexe.fe_selfdict = selfdict;
+	r = call_func(name, -1, rettv, argc, argv, &funcexe);
+    }
+
+    // Free the arguments.
+    while (argc > 0)
+	clear_tv(&argv[--argc]);
+
+    return r;
+}
+
+static int callback_depth = 0;
+
+    int
+get_callback_depth(void)
+{
+    return callback_depth;
+}
+
+/*
+ * Invoke call_func() with a callback.
+ * Returns FAIL if the callback could not be called.
+ */
+    int
+call_callback(
+    callback_T	*callback,
+    int		len,		// length of "name" or -1 to use strlen()
+    typval_T	*rettv,		// return value goes here
+    int		argcount,	// number of "argvars"
+    typval_T	*argvars)	// vars for arguments, must have "argcount"
+				// PLUS ONE elements!
+{
+    funcexe_T	funcexe;
+    int		ret;
+
+    if (callback->cb_name == NULL || *callback->cb_name == NUL)
+	return FAIL;
+    CLEAR_FIELD(funcexe);
+    funcexe.fe_evaluate = TRUE;
+    funcexe.fe_partial = callback->cb_partial;
+    ++callback_depth;
+    ret = call_func(callback->cb_name, len, rettv, argcount, argvars, &funcexe);
+    --callback_depth;
+
+    // When a :def function was called that uses :try an error would be turned
+    // into an exception.  Need to give the error here.
+    if (need_rethrow && current_exception != NULL && trylevel == 0)
+    {
+	need_rethrow = FALSE;
+	handle_did_throw();
+    }
+
+    return ret;
+}
+
+/*
+ * call the 'callback' function and return the result as a number.
+ * Returns -2 when calling the function fails.  Uses argv[0] to argv[argc - 1]
+ * for the function arguments. argv[argc] should have type VAR_UNKNOWN.
+ */
+    varnumber_T
+call_callback_retnr(
+    callback_T	*callback,
+    int		argcount,	// number of "argvars"
+    typval_T	*argvars)	// vars for arguments, must have "argcount"
+				// PLUS ONE elements!
+{
+    typval_T	rettv;
+    varnumber_T	retval;
+
+    if (call_callback(callback, -1, &rettv, argcount, argvars) == FAIL)
+	return -2;
+
+    retval = tv_get_number_chk(&rettv, NULL);
+    clear_tv(&rettv);
+    return retval;
+}
+
+/*
+ * Give an error message for the result of a function.
+ * Nothing if "error" is FCERR_NONE.
+ */
+    void
+user_func_error(funcerror_T error, char_u *name, int found_var)
+{
+    switch (error)
+    {
+	case FCERR_UNKNOWN:
+		if (found_var)
+		    emsg_funcname(e_not_callable_type_str, name);
+		else
+		    emsg_funcname(e_unknown_function_str, name);
+		break;
+	case FCERR_NOTMETHOD:
+		emsg_funcname(e_cannot_use_function_as_method_str, name);
+		break;
+	case FCERR_DELETED:
+		emsg_funcname(e_function_was_deleted_str, name);
+		break;
+	case FCERR_TOOMANY:
+		emsg_funcname(e_too_many_arguments_for_function_str, name);
+		break;
+	case FCERR_TOOFEW:
+		emsg_funcname(e_not_enough_arguments_for_function_str, name);
+		break;
+	case FCERR_SCRIPT:
+		emsg_funcname(e_using_sid_not_in_script_context_str, name);
+		break;
+	case FCERR_DICT:
+		emsg_funcname(e_calling_dict_function_without_dictionary_str,
+									 name);
+		break;
+	case FCERR_OTHER:
+	case FCERR_FAILED:
+		// assume the error message was already given
+		break;
+	case FCERR_NONE:
+		break;
+    }
+}
+
+/*
+ * Call a function with its resolved parameters
+ *
+ * Return FAIL when the function can't be called,  OK otherwise.
+ * Also returns OK when an error was encountered while executing the function.
+ */
+    int
+call_func(
+    char_u	*funcname,	// name of the function
+    int		len,		// length of "name" or -1 to use strlen()
+    typval_T	*rettv,		// return value goes here
+    int		argcount_in,	// number of "argvars"
+    typval_T	*argvars_in,	// vars for arguments, must have "argcount"
+				// PLUS ONE elements!
+    funcexe_T	*funcexe)	// more arguments
+{
+    int		ret = FAIL;
+    funcerror_T	error = FCERR_NONE;
+    int		i;
+    ufunc_T	*fp = NULL;
+    char_u	fname_buf[FLEN_FIXED + 1];
+    char_u	*tofree = NULL;
+    char_u	*fname = NULL;
+    char_u	*name = NULL;
+    int		argcount = argcount_in;
+    typval_T	*argvars = argvars_in;
+    dict_T	*selfdict = funcexe->fe_selfdict;
+    typval_T	argv[MAX_FUNC_ARGS + 1]; // used when "partial" or
+					 // "funcexe->fe_basetv" is not NULL
+    int		argv_clear = 0;
+    int		argv_base = 0;
+    partial_T	*partial = funcexe->fe_partial;
+    type_T	check_type;
+    type_T	*check_type_args[MAX_FUNC_ARGS];
+
+    // Initialize rettv so that it is safe for caller to invoke clear_tv(rettv)
+    // even when call_func() returns FAIL.
+    rettv->v_type = VAR_UNKNOWN;
+
+    if (partial != NULL)
+	fp = partial->pt_func;
+    if (fp == NULL)
+    {
+	// Make a copy of the name, if it comes from a funcref variable it
+	// could be changed or deleted in the called function.
+	name = len > 0 ? vim_strnsave(funcname, len) : vim_strsave(funcname);
+	if (name == NULL)
+	    return ret;
+
+	fname = fname_trans_sid(name, fname_buf, &tofree, &error);
+    }
+
+    if (funcexe->fe_doesrange != NULL)
+	*funcexe->fe_doesrange = FALSE;
+
+    if (partial != NULL)
+    {
+	// When the function has a partial with a dict and there is a dict
+	// argument, use the dict argument.  That is backwards compatible.
+	// When the dict was bound explicitly use the one from the partial.
+	if (partial->pt_dict != NULL && (selfdict == NULL || !partial->pt_auto))
+	    selfdict = partial->pt_dict;
+	if (error == FCERR_NONE && partial->pt_argc > 0)
+	{
+	    for (argv_clear = 0; argv_clear < partial->pt_argc; ++argv_clear)
+	    {
+		if (argv_clear + argcount_in >= MAX_FUNC_ARGS)
+		{
+		    error = FCERR_TOOMANY;
+		    goto theend;
+		}
+		copy_tv(&partial->pt_argv[argv_clear], &argv[argv_clear]);
+	    }
+	    for (i = 0; i < argcount_in; ++i)
+		argv[i + argv_clear] = argvars_in[i];
+	    argvars = argv;
+	    argcount = partial->pt_argc + argcount_in;
+
+	    if (funcexe->fe_check_type != NULL
+				  && funcexe->fe_check_type->tt_argcount != -1)
+	    {
+		// Now funcexe->fe_check_type is missing the added arguments,
+		// make a copy of the type with the correction.
+		check_type = *funcexe->fe_check_type;
+		funcexe->fe_check_type = &check_type;
+		check_type.tt_args = check_type_args;
+		CLEAR_FIELD(check_type_args);
+		for (i = 0; i < check_type.tt_argcount; ++i)
+		    check_type_args[i + partial->pt_argc] =
+							 check_type.tt_args[i];
+		check_type.tt_argcount += partial->pt_argc;
+		check_type.tt_min_argcount += partial->pt_argc;
+	    }
+	}
+    }
+
+    if (error == FCERR_NONE && funcexe->fe_check_type != NULL
+						       && funcexe->fe_evaluate)
+    {
+	// Check that the argument types are OK for the types of the funcref.
+	if (check_argument_types(funcexe->fe_check_type,
+					 argvars, argcount, funcexe->fe_basetv,
+				     (name != NULL) ? name : funcname) == FAIL)
+	    error = FCERR_OTHER;
+    }
+
+    if (error == FCERR_NONE && funcexe->fe_evaluate)
+    {
+	char_u *rfname = fname;
+	int	is_global = FALSE;
+
+	// Skip "g:" before a function name.
+	if (fp == NULL && fname[0] == 'g' && fname[1] == ':')
+	{
+	    is_global = TRUE;
+	    rfname = fname + 2;
+	}
+
+	rettv->v_type = VAR_NUMBER;	// default rettv is number zero
+	rettv->vval.v_number = 0;
+	error = FCERR_UNKNOWN;
+
+	if (fp != NULL || !builtin_function(rfname, -1))
+	{
+	    /*
+	     * User defined function.
+	     */
+	    if (fp == NULL)
+	    {
+		fp = find_func(rfname, is_global);
+		if (fp != NULL && !is_global && in_vim9script()
+						 && func_requires_g_prefix(fp))
+		    // In Vim9 script g: is required to find a global
+		    // non-autoload function.
+		    fp = NULL;
+	    }
+
+	    // Trigger FuncUndefined event, may load the function.
+	    if (fp == NULL
+		    && apply_autocmds(EVENT_FUNCUNDEFINED,
+						    rfname, rfname, TRUE, NULL)
+		    && !aborting())
+	    {
+		// executed an autocommand, search for the function again
+		fp = find_func(rfname, is_global);
+	    }
+	    // Try loading a package.
+	    if (fp == NULL && script_autoload(rfname, TRUE) && !aborting())
+	    {
+		// loaded a package, search for the function again
+		fp = find_func(rfname, is_global);
+	    }
+	    if (fp == NULL)
+	    {
+		char_u *p = untrans_function_name(rfname);
+
+		// If using Vim9 script try not local to the script.
+		// Don't do this if the name starts with "s:".
+		if (p != NULL && (funcname[0] != 's' || funcname[1] != ':'))
+		    fp = find_func(p, is_global);
+	    }
+
+	    if (fp != NULL && (fp->uf_flags & FC_DELETED))
+		error = FCERR_DELETED;
+	    else if (fp != NULL)
+	    {
+		if (funcexe->fe_argv_func != NULL)
+		    // postponed filling in the arguments, do it now
+		    argcount = funcexe->fe_argv_func(argcount, argvars,
+					       argv_clear, fp);
+
+		if (funcexe->fe_basetv != NULL)
+		{
+		    // Method call: base->Method()
+		    mch_memmove(&argv[1], argvars, sizeof(typval_T) * argcount);
+		    argv[0] = *funcexe->fe_basetv;
+		    argcount++;
+		    argvars = argv;
+		    argv_base = 1;
+		}
+
+		error = call_user_func_check(fp, argcount, argvars, rettv,
+							    funcexe, selfdict);
+	    }
+	}
+	else if (funcexe->fe_basetv != NULL)
+	{
+	    /*
+	     * expr->method(): Find the method name in the table, call its
+	     * implementation with the base as one of the arguments.
+	     */
+	    error = call_internal_method(fname, argcount, argvars, rettv,
+							   funcexe->fe_basetv);
+	}
+	else
+	{
+	    /*
+	     * Find the function name in the table, call its implementation.
+	     */
+	    error = call_internal_func(fname, argcount, argvars, rettv);
+	}
+
+	/*
+	 * The function call (or "FuncUndefined" autocommand sequence) might
+	 * have been aborted by an error, an interrupt, or an explicitly thrown
+	 * exception that has not been caught so far.  This situation can be
+	 * tested for by calling aborting().  For an error in an internal
+	 * function or for the "E132" error in call_user_func(), however, the
+	 * throw point at which the "force_abort" flag (temporarily reset by
+	 * emsg()) is normally updated has not been reached yet. We need to
+	 * update that flag first to make aborting() reliable.
+	 */
+	update_force_abort();
+    }
+    if (error == FCERR_NONE)
+	ret = OK;
+
+theend:
+    /*
+     * Report an error unless the argument evaluation or function call has been
+     * cancelled due to an aborting error, an interrupt, or an exception.
+     */
+    if (!aborting())
+	user_func_error(error, (name != NULL) ? name : funcname,
+							funcexe->fe_found_var);
+
+    // clear the copies made from the partial
+    while (argv_clear > 0)
+	clear_tv(&argv[--argv_clear + argv_base]);
+
+    vim_free(tofree);
+    vim_free(name);
+
+    return ret;
+}
+
+/*
+ * Call a function without arguments, partial or dict.
+ * This is like call_func() when the call is only "FuncName()".
+ * To be used by "expr" options.
+ * Returns NOTDONE when the function could not be found.
+ */
+    int
+call_simple_func(
+    char_u	*funcname,	// name of the function
+    int		len,		// length of "name" or -1 to use strlen()
+    typval_T	*rettv)		// return value goes here
+{
+    int		ret = FAIL;
+    funcerror_T	error = FCERR_NONE;
+    char_u	fname_buf[FLEN_FIXED + 1];
+    char_u	*tofree = NULL;
+    char_u	*name;
+    char_u	*fname;
+    char_u	*rfname;
+    int		is_global = FALSE;
+    ufunc_T	*fp;
+
+    rettv->v_type = VAR_NUMBER;	// default rettv is number zero
+    rettv->vval.v_number = 0;
+
+    // Make a copy of the name, an option can be changed in the function.
+    name = vim_strnsave(funcname, len);
+    if (name == NULL)
+	return ret;
+
+    fname = fname_trans_sid(name, fname_buf, &tofree, &error);
+
+    // Skip "g:" before a function name.
+    if (fname[0] == 'g' && fname[1] == ':')
+    {
+	is_global = TRUE;
+	rfname = fname + 2;
+    }
+    else
+	rfname = fname;
+    fp = find_func(rfname, is_global);
+    if (fp != NULL && !is_global && in_vim9script()
+						 && func_requires_g_prefix(fp))
+	// In Vim9 script g: is required to find a global non-autoload
+	// function.
+	fp = NULL;
+    if (fp == NULL)
+	ret = NOTDONE;
+    else if (fp != NULL && (fp->uf_flags & FC_DELETED))
+	error = FCERR_DELETED;
+    else if (fp != NULL)
+    {
+	typval_T argvars[1];
+	funcexe_T	funcexe;
+
+	argvars[0].v_type = VAR_UNKNOWN;
+	CLEAR_FIELD(funcexe);
+	funcexe.fe_evaluate = TRUE;
+
+	error = call_user_func_check(fp, 0, argvars, rettv, &funcexe, NULL);
+	if (error == FCERR_NONE)
+	    ret = OK;
+    }
+
+    user_func_error(error, name, FALSE);
+    vim_free(tofree);
+    vim_free(name);
+
+    return ret;
+}
+
+    char_u *
+printable_func_name(ufunc_T *fp)
+{
+    return fp->uf_name_exp != NULL ? fp->uf_name_exp : fp->uf_name;
+}
+
+/*
+ * When "prev_ht_changed" does not equal "ht_changed" give an error and return
+ * TRUE.  Otherwise return FALSE.
+ */
+    static int
+function_list_modified(int prev_ht_changed)
+{
+    if (prev_ht_changed != func_hashtab.ht_changed)
+    {
+	emsg(_(e_function_list_was_modified));
+	return TRUE;
+    }
+    return FALSE;
+}
+
+/*
+ * List the head of the function: "function name(arg1, arg2)".
+ */
+    static int
+list_func_head(ufunc_T *fp, int indent)
+{
+    int		prev_ht_changed = func_hashtab.ht_changed;
+    int		j;
+
+    msg_start();
+
+    // a timer at the more prompt may have deleted the function
+    if (function_list_modified(prev_ht_changed))
+	return FAIL;
+
+    if (indent)
+	msg_puts("   ");
+    if (fp->uf_def_status != UF_NOT_COMPILED)
+	msg_puts("def ");
+    else
+	msg_puts("function ");
+    msg_puts((char *)printable_func_name(fp));
+    msg_putchar('(');
+    for (j = 0; j < fp->uf_args.ga_len; ++j)
+    {
+	if (j)
+	    msg_puts(", ");
+	msg_puts((char *)FUNCARG(fp, j));
+	if (fp->uf_arg_types != NULL)
+	{
+	    char *tofree;
+
+	    msg_puts(": ");
+	    msg_puts(type_name(fp->uf_arg_types[j], &tofree));
+	    vim_free(tofree);
+	}
+	if (j >= fp->uf_args.ga_len - fp->uf_def_args.ga_len)
+	{
+	    msg_puts(" = ");
+	    msg_puts(((char **)(fp->uf_def_args.ga_data))
+		       [j - fp->uf_args.ga_len + fp->uf_def_args.ga_len]);
+	}
+    }
+    if (fp->uf_varargs)
+    {
+	if (j)
+	    msg_puts(", ");
+	msg_puts("...");
+    }
+    if (fp->uf_va_name != NULL)
+    {
+	if (!fp->uf_varargs)
+	{
+	    if (j)
+		msg_puts(", ");
+	    msg_puts("...");
+	}
+	msg_puts((char *)fp->uf_va_name);
+	if (fp->uf_va_type != NULL)
+	{
+	    char *tofree;
+
+	    msg_puts(": ");
+	    msg_puts(type_name(fp->uf_va_type, &tofree));
+	    vim_free(tofree);
+	}
+    }
+    msg_putchar(')');
+
+    if (fp->uf_def_status != UF_NOT_COMPILED)
+    {
+	if (fp->uf_ret_type != &t_void)
+	{
+	    char *tofree;
+
+	    msg_puts(": ");
+	    msg_puts(type_name(fp->uf_ret_type, &tofree));
+	    vim_free(tofree);
+	}
+    }
+    else if (fp->uf_flags & FC_ABORT)
+	msg_puts(" abort");
+    if (fp->uf_flags & FC_RANGE)
+	msg_puts(" range");
+    if (fp->uf_flags & FC_DICT)
+	msg_puts(" dict");
+    if (fp->uf_flags & FC_CLOSURE)
+	msg_puts(" closure");
+    msg_clr_eos();
+    if (p_verbose > 0)
+	last_set_msg(fp->uf_script_ctx);
+
+    return OK;
+}
+
+/*
+ * Get a function name, translating "<SID>" and "<SNR>".
+ * Also handles a Funcref in a List or Dictionary.
+ * Returns the function name in allocated memory, or NULL for failure.
+ * Set "*is_global" to TRUE when the function must be global, unless
+ * "is_global" is NULL.
+ * flags:
+ * TFN_INT:	    internal function name OK
+ * TFN_IN_CLASS:    function in a class
+ * TFN_QUIET:	    be quiet
+ * TFN_NO_AUTOLOAD: do not use script autoloading
+ * TFN_NO_DEREF:    do not dereference a Funcref
+ * Advances "pp" to just after the function name (if no error).
+ */
+    char_u *
+trans_function_name(
+    char_u	**pp,
+    int		*is_global,
+    int		skip,		// only find the end, don't evaluate
+    int		flags)
+{
+    return trans_function_name_ext(pp, is_global, skip, flags,
+	    NULL, NULL, NULL, NULL);
+}
+
+/*
+ * trans_function_name() with extra arguments.
+ * "fdp", "partial", "type" and "ufunc" can be NULL.
+ */
+    char_u *
+trans_function_name_ext(
+    char_u	**pp,
+    int		*is_global,
+    int		skip,		// only find the end, don't evaluate
+    int		flags,
+    funcdict_T	*fdp,		// return: info about dictionary used
+    partial_T	**partial,	// return: partial of a FuncRef
+    type_T	**type,		// return: type of funcref
+    ufunc_T	**ufunc)	// return: function
+{
+    char_u	*name = NULL;
+    char_u	*start;
+    char_u	*end;
+    int		lead;
+    char_u	sid_buf[20];
+    int		len;
+    int		extra = 0;
+    int		prefix_g = FALSE;
+    lval_T	lv;
+    int		vim9script = in_vim9script();
+    int		vim9_local;
+
+    if (fdp != NULL)
+	CLEAR_POINTER(fdp);
+    start = *pp;
+
+    // Check for hard coded <SNR>: already translated function ID (from a user
+    // command).
+    if ((*pp)[0] == K_SPECIAL && (*pp)[1] == KS_EXTRA
+						   && (*pp)[2] == (int)KE_SNR)
+    {
+	*pp += 3;
+	len = get_id_len(pp) + 3;
+	return vim_strnsave(start, len);
+    }
+
+    // A name starting with "<SID>" or "<SNR>" is local to a script.  But
+    // don't skip over "s:", get_lval() needs it for "s:dict.func".
+    lead = eval_fname_script(start);
+    if (lead > 2)
+	start += lead;
+
+    // Note that TFN_ flags use the same values as GLV_ flags.
+    end = get_lval(start, NULL, &lv, FALSE, skip,
+			flags | GLV_READ_ONLY | GLV_PREFER_FUNC,
+					      lead > 2 ? 0 : FNE_CHECK_START);
+    if (end == start || (vim9script && end != NULL
+				   && end[-1] == AUTOLOAD_CHAR && *end == '('))
+    {
+	if (!skip)
+	    emsg(_(e_function_name_required));
+	goto theend;
+    }
+    if (end == NULL || (lv.ll_tv != NULL && (lead > 2 || lv.ll_range)))
+    {
+	/*
+	 * Report an invalid expression in braces, unless the expression
+	 * evaluation has been cancelled due to an aborting error, an
+	 * interrupt, or an exception.
+	 */
+	if (!aborting())
+	{
+	    if (end != NULL)
+		semsg(_(e_invalid_argument_str), start);
+	}
+	else
+	    *pp = find_name_end(start, NULL, NULL, FNE_INCL_BR);
+	goto theend;
+    }
+
+    if (lv.ll_ufunc != NULL)
+    {
+	*ufunc = lv.ll_ufunc;
+	name = vim_strsave(lv.ll_ufunc->uf_name);
+	goto theend;
+    }
+
+    if (lv.ll_tv != NULL)
+    {
+	if (fdp != NULL)
+	{
+	    fdp->fd_dict = lv.ll_dict;
+	    fdp->fd_newkey = lv.ll_newkey;
+	    lv.ll_newkey = NULL;
+	    fdp->fd_di = lv.ll_di;
+	}
+	if (lv.ll_tv->v_type == VAR_FUNC && lv.ll_tv->vval.v_string != NULL)
+	{
+	    name = vim_strsave(lv.ll_tv->vval.v_string);
+	    *pp = end;
+	}
+	else if (lv.ll_tv->v_type == VAR_CLASS
+					     && lv.ll_tv->vval.v_class != NULL)
+	{
+	    name = vim_strsave(lv.ll_tv->vval.v_class->class_name);
+	    *pp = end;
+	}
+	else if (lv.ll_tv->v_type == VAR_PARTIAL
+					  && lv.ll_tv->vval.v_partial != NULL)
+	{
+	    name = vim_strsave(partial_name(lv.ll_tv->vval.v_partial));
+	    *pp = end;
+	    if (partial != NULL)
+		*partial = lv.ll_tv->vval.v_partial;
+	}
+	else
+	{
+	    if (!skip && !(flags & TFN_QUIET) && (fdp == NULL
+			     || lv.ll_dict == NULL || fdp->fd_newkey == NULL))
+		emsg(_(e_funcref_required));
+	    else
+		*pp = end;
+	    name = NULL;
+	}
+	goto theend;
+    }
+
+    if (lv.ll_name == NULL)
+    {
+	// Error found, but continue after the function name.
+	*pp = end;
+	goto theend;
+    }
+
+    // Check if the name is a Funcref.  If so, use the value.
+    if (lv.ll_exp_name != NULL)
+    {
+	len = (int)STRLEN(lv.ll_exp_name);
+	name = deref_func_name(lv.ll_exp_name, &len, partial, type,
+			  flags & TFN_NO_AUTOLOAD, flags & TFN_NEW_FUNC, NULL);
+	if (name == lv.ll_exp_name)
+	    name = NULL;
+    }
+    else if (lv.ll_sid > 0)
+    {
+	scriptitem_T	*si = SCRIPT_ITEM(lv.ll_sid);
+	int		cc = *lv.ll_name_end;
+
+	// function in another script.  Prefix <SNR>99_ or the autoload prefix.
+	*lv.ll_name_end = NUL;
+	if (si->sn_autoload_prefix != NULL)
+	{
+	    name = concat_str(si->sn_autoload_prefix, lv.ll_name);
+	}
+	else
+	{
+	    sid_buf[0] = K_SPECIAL;
+	    sid_buf[1] = KS_EXTRA;
+	    sid_buf[2] = (int)KE_SNR;
+	    vim_snprintf((char *)sid_buf + 3, sizeof(sid_buf) - 3,
+						      "%ld_", (long)lv.ll_sid);
+	    name = concat_str(sid_buf, lv.ll_name);
+	}
+	*lv.ll_name_end = cc;
+	*pp = end;
+	goto theend;
+    }
+    else if (!(flags & TFN_NO_DEREF))
+    {
+	len = (int)(end - *pp);
+	name = deref_func_name(*pp, &len, partial, type,
+			  flags & TFN_NO_AUTOLOAD, flags & TFN_NEW_FUNC, NULL);
+	if (name == *pp)
+	    name = NULL;
+    }
+    if (name != NULL)
+    {
+	name = vim_strsave(name);
+	*pp = end;
+	if (STRNCMP(name, "<SNR>", 5) == 0)
+	{
+	    // Change "<SNR>" to the byte sequence.
+	    name[0] = K_SPECIAL;
+	    name[1] = KS_EXTRA;
+	    name[2] = (int)KE_SNR;
+	    mch_memmove(name + 3, name + 5, STRLEN(name + 5) + 1);
+	}
+	goto theend;
+    }
+
+    if (lv.ll_exp_name != NULL)
+    {
+	len = (int)STRLEN(lv.ll_exp_name);
+	if (lead <= 2 && lv.ll_name == lv.ll_exp_name
+					 && STRNCMP(lv.ll_name, "s:", 2) == 0)
+	{
+	    // When there was "s:" already or the name expanded to get a
+	    // leading "s:" then remove it.
+	    lv.ll_name += 2;
+	    len -= 2;
+	    lead = 2;
+	}
+    }
+    else
+    {
+	// skip over "s:" and "g:"
+	if (lead == 2 || (lv.ll_name[0] == 'g' && lv.ll_name[1] == ':'))
+	{
+	    if (lv.ll_name[0] == 'g')
+	    {
+		if (is_global != NULL)
+		{
+		    *is_global = TRUE;
+		}
+		else
+		{
+		    // dropping "g:" without setting "is_global" won't work in
+		    // Vim9script, put it back later
+		    prefix_g = TRUE;
+		    extra = 2;
+		}
+	    }
+	    lv.ll_name += 2;
+	}
+	len = (int)(end - lv.ll_name);
+    }
+    if (len <= 0)
+    {
+	if (!skip)
+	    emsg(_(e_function_name_required));
+	goto theend;
+    }
+
+    // In Vim9 script a user function is script-local by default, unless it
+    // starts with a lower case character: dict.func().  Or when in a class.
+    vim9_local = ASCII_ISUPPER(*start) && vim9script
+						&& (flags & TFN_IN_CLASS) == 0;
+
+    /*
+     * Copy the function name to allocated memory.
+     * Accept <SID>name() inside a script, translate into <SNR>123_name().
+     * Accept <SNR>123_name() outside a script.
+     */
+    if (skip)
+	lead = 0;	// do nothing
+    else if (lead > 0 || vim9_local)
+    {
+	if (!vim9_local)
+	{
+	    if (vim9script && lead == 2 && !ASCII_ISUPPER(*lv.ll_name)
+						   && current_script_is_vim9())
+	    {
+		semsg(_(e_function_name_must_start_with_capital_str), start);
+		goto theend;
+	    }
+	    lead = 3;
+	}
+	if (vim9_local || (lv.ll_exp_name != NULL
+					     && eval_fname_sid(lv.ll_exp_name))
+						       || eval_fname_sid(*pp))
+	{
+	    // It's script-local, "s:" or "<SID>"
+	    if (current_sctx.sc_sid <= 0)
+	    {
+		emsg(_(e_using_sid_not_in_script_context));
+		goto theend;
+	    }
+	    sprintf((char *)sid_buf, "%ld_", (long)current_sctx.sc_sid);
+	    if (vim9_local)
+		extra = 3 + (int)STRLEN(sid_buf);
+	    else
+		lead += (int)STRLEN(sid_buf);
+	}
+    }
+    else if (!(flags & TFN_INT)
+	    && (builtin_function(lv.ll_name, len)
+				   || (vim9script && *lv.ll_name == '_'))
+	    && !((flags & TFN_IN_CLASS) && STRNCMP(lv.ll_name, "new", 3) == 0))
+    {
+	semsg(_(vim9script ? e_function_name_must_start_with_capital_str
+			   : e_function_name_must_start_with_capital_or_s_str),
+									start);
+	goto theend;
+    }
+    if (!skip && !(flags & TFN_QUIET) && !(flags & TFN_NO_DEREF))
+    {
+	char_u *cp = vim_strchr(lv.ll_name, ':');
+
+	if (cp != NULL && cp < end)
+	{
+	    semsg(_(e_function_name_cannot_contain_colon_str), start);
+	    goto theend;
+	}
+    }
+
+    name = alloc(len + lead + extra + 1);
+    if (name != NULL)
+    {
+	if (!skip && (lead > 0 || vim9_local))
+	{
+	    name[0] = K_SPECIAL;
+	    name[1] = KS_EXTRA;
+	    name[2] = (int)KE_SNR;
+	    if (vim9_local || lead > 3)	// If it's "<SID>"
+		STRCPY(name + 3, sid_buf);
+	}
+	else if (prefix_g)
+	{
+	    name[0] = 'g';
+	    name[1] = ':';
+	}
+	mch_memmove(name + lead + extra, lv.ll_name, (size_t)len);
+	name[lead + extra + len] = NUL;
+    }
+    *pp = end;
+
+theend:
+    clear_lval(&lv);
+    return name;
+}
+
+/*
+ * Assuming "name" is the result of trans_function_name() and it was prefixed
+ * to use the script-local name, return the unmodified name (points into
+ * "name").  Otherwise return NULL.
+ * This can be used to first search for a script-local function and fall back
+ * to the global function if not found.
+ */
+    static char_u *
+untrans_function_name(char_u *name)
+{
+    char_u *p;
+
+    if (*name == K_SPECIAL && in_vim9script())
+    {
+	p = vim_strchr(name, '_');
+	if (p != NULL)
+	    return p + 1;
+    }
+    return NULL;
+}
+
+/*
+ * If the 'funcname' starts with "s:" or "<SID>", then expands it to the
+ * current script ID and returns the expanded function name. The caller should
+ * free the returned name. If not called from a script context or the function
+ * name doesn't start with these prefixes, then returns NULL.
+ * This doesn't check whether the script-local function exists or not.
+ */
+    char_u *
+get_scriptlocal_funcname(char_u *funcname)
+{
+    char	sid_buf[25];
+    int		off;
+    char_u	*newname;
+    char_u	*p = funcname;
+
+    if (funcname == NULL)
+	return NULL;
+
+    if (STRNCMP(funcname, "s:", 2) != 0
+		&& STRNCMP(funcname, "<SID>", 5) != 0)
+    {
+	ufunc_T	    *ufunc;
+
+	// The function name does not have a script-local prefix.  Try finding
+	// it when in a Vim9 script and there is no "g:" prefix.
+	if (!in_vim9script() || STRNCMP(funcname, "g:", 2) == 0)
+	    return NULL;
+	ufunc = find_func(funcname, FALSE);
+	if (ufunc == NULL || func_is_global(ufunc)
+			      || (p = vim_strchr(ufunc->uf_name, '_')) == NULL)
+	    return NULL;
+	++p;
+	off = 0;
+    }
+    else
+	off = *funcname == 's' ? 2 : 5;
+
+    if (!SCRIPT_ID_VALID(current_sctx.sc_sid))
+    {
+	emsg(_(e_using_sid_not_in_script_context));
+	return NULL;
+    }
+    // Expand s: prefix into <SNR>nr_<name>
+    vim_snprintf(sid_buf, sizeof(sid_buf), "<SNR>%ld_",
+	    (long)current_sctx.sc_sid);
+    newname = alloc(STRLEN(sid_buf) + STRLEN(p + off) + 1);
+    if (newname == NULL)
+	return NULL;
+    STRCPY(newname, sid_buf);
+    STRCAT(newname, p + off);
+
+    return newname;
+}
+
+/*
+ * Return script-local "fname" with the 3-byte sequence replaced by
+ * printable <SNR> in allocated memory.
+ */
+    char_u *
+alloc_printable_func_name(char_u *fname)
+{
+    char_u *n = alloc(STRLEN(fname + 3) + 6);
+
+    if (n != NULL)
+    {
+	STRCPY(n, "<SNR>");
+	STRCPY(n + 5, fname + 3);
+    }
+    return n;
+}
+
+/*
+ * Call trans_function_name(), except that a lambda is returned as-is.
+ * Returns the name in allocated memory.
+ */
+    char_u *
+save_function_name(
+	char_u	    **name,
+	int	    *is_global,
+	int	    skip,
+	int	    flags,
+	funcdict_T  *fudi)
+{
+    char_u *p = *name;
+    char_u *saved;
+
+    if (STRNCMP(p, "<lambda>", 8) == 0)
+    {
+	p += 8;
+	(void)getdigits(&p);
+	saved = vim_strnsave(*name, p - *name);
+	if (fudi != NULL)
+	    CLEAR_POINTER(fudi);
+    }
+    else
+	saved = trans_function_name_ext(&p, is_global, skip,
+						flags, fudi, NULL, NULL, NULL);
+    *name = p;
+    return saved;
+}
+
+/*
+ * List functions.  When "regmatch" is NULL all of then.
+ * Otherwise functions matching "regmatch".
+ */
+    void
+list_functions(regmatch_T *regmatch)
+{
+    int		prev_ht_changed = func_hashtab.ht_changed;
+    long_u	todo = func_hashtab.ht_used;
+    hashitem_T	*hi;
+
+    for (hi = func_hashtab.ht_array; todo > 0 && !got_int; ++hi)
+    {
+	if (!HASHITEM_EMPTY(hi))
+	{
+	    ufunc_T	*fp = HI2UF(hi);
+
+	    --todo;
+	    if ((fp->uf_flags & FC_DEAD) == 0
+		    && (regmatch == NULL
+			? !message_filtered(fp->uf_name)
+			    && !func_name_refcount(fp->uf_name)
+			: !isdigit(*fp->uf_name)
+			    && vim_regexec(regmatch, fp->uf_name, 0)))
+	    {
+		if (list_func_head(fp, FALSE) == FAIL)
+		    return;
+		if (function_list_modified(prev_ht_changed))
+		    return;
+	    }
+	}
+    }
+}
+
+/*
+ * ":function" also supporting nested ":def".
+ * When "name_arg" is not NULL this is a nested function, using "name_arg" for
+ * the function name.
+ * "lines_to_free" is a list of strings to be freed later.
+ * If "class_flags" has CF_CLASS then the function is defined inside a class.
+ * With CF_INTERFACE the function is define inside an interface, only the
+ * ":def"/":function" line is expected, no function body.
+ * Returns a pointer to the function or NULL if no function defined.
+ */
+    ufunc_T *
+define_function(
+	exarg_T	    *eap,
+	char_u	    *name_arg,
+	garray_T    *lines_to_free,
+	int	    class_flags)
+{
+    int		j;
+    int		c;
+    int		saved_did_emsg = FALSE;
+    char_u	*name = name_arg;
+    int		is_global = FALSE;
+    char_u	*p;
+    char_u	*arg;
+    char_u	*whitep;
+    char_u	*line_arg = NULL;
+    garray_T	newargs;
+    garray_T	argtypes;
+    garray_T	default_args;
+    garray_T	newlines;
+    int		varargs = FALSE;
+    int		flags = 0;
+    char_u	*ret_type = NULL;
+    ufunc_T	*fp = NULL;
+    int		fp_allocated = FALSE;
+    int		free_fp = FALSE;
+    int		overwrite = FALSE;
+    dictitem_T	*v;
+    funcdict_T	fudi;
+    static int	func_nr = 0;	    // number for nameless function
+    int		paren;
+    hashitem_T	*hi;
+    linenr_T	sourcing_lnum_top;
+    int		vim9script = in_vim9script();
+    imported_T	*import = NULL;
+
+    /*
+     * ":function" without argument: list functions.
+     */
+    if (ends_excmd2(eap->cmd, eap->arg))
+    {
+	if (!eap->skip)
+	    list_functions(NULL);
+	set_nextcmd(eap, eap->arg);
+	return NULL;
+    }
+
+    /*
+     * ":function /pat": list functions matching pattern.
+     */
+    if (*eap->arg == '/')
+    {
+	p = skip_regexp(eap->arg + 1, '/', TRUE);
+	if (!eap->skip)
+	{
+	    regmatch_T	regmatch;
+
+	    c = *p;
+	    *p = NUL;
+	    regmatch.regprog = vim_regcomp(eap->arg + 1, RE_MAGIC);
+	    *p = c;
+	    if (regmatch.regprog != NULL)
+	    {
+		regmatch.rm_ic = p_ic;
+		list_functions(&regmatch);
+		vim_regfree(regmatch.regprog);
+	    }
+	}
+	if (*p == '/')
+	    ++p;
+	set_nextcmd(eap, p);
+	return NULL;
+    }
+
+    ga_init(&newargs);
+    ga_init(&argtypes);
+    ga_init(&default_args);
+
+    /*
+     * Get the function name.  There are these situations:
+     * func	    normal function name, also when "class_flags" is non-zero
+     *		    "name" == func, "fudi.fd_dict" == NULL
+     * dict.func    new dictionary entry
+     *		    "name" == NULL, "fudi.fd_dict" set,
+     *		    "fudi.fd_di" == NULL, "fudi.fd_newkey" == func
+     * dict.func    existing dict entry with a Funcref
+     *		    "name" == func, "fudi.fd_dict" set,
+     *		    "fudi.fd_di" set, "fudi.fd_newkey" == NULL
+     * dict.func    existing dict entry that's not a Funcref
+     *		    "name" == NULL, "fudi.fd_dict" set,
+     *		    "fudi.fd_di" set, "fudi.fd_newkey" == NULL
+     * s:func	    script-local function name
+     * g:func	    global function name, same as "func"
+     */
+    p = eap->arg;
+    if (name_arg != NULL)
+    {
+	// nested function, argument is (args).
+	paren = TRUE;
+	CLEAR_FIELD(fudi);
+    }
+    else
+    {
+	if (vim9script)
+	{
+	    if (p[0] == 's' && p[1] == ':')
+	    {
+		semsg(_(e_cannot_use_s_colon_in_vim9_script_str), p);
+		return NULL;
+	    }
+	    p = to_name_end(p, TRUE);
+	    if (*skipwhite(p) == '.' && vim_strchr(p, '(') != NULL)
+	    {
+		semsg(_(e_cannot_define_dict_func_in_vim9_script_str),
+								     eap->arg);
+		return NULL;
+	    }
+	    p = eap->arg;
+	}
+
+	int tfn_flags = TFN_NO_AUTOLOAD | TFN_NEW_FUNC
+				       | (class_flags != 0 ? TFN_IN_CLASS : 0);
+	name = save_function_name(&p, &is_global, eap->skip, tfn_flags, &fudi);
+	paren = (vim_strchr(p, '(') != NULL);
+	if (name == NULL && (fudi.fd_dict == NULL || !paren) && !eap->skip)
+	{
+	    /*
+	     * Return on an invalid expression in braces, unless the expression
+	     * evaluation has been cancelled due to an aborting error, an
+	     * interrupt, or an exception.
+	     */
+	    if (!aborting())
+	    {
+		if (!eap->skip && fudi.fd_newkey != NULL)
+		    semsg(_(e_key_not_present_in_dictionary_str),
+							       fudi.fd_newkey);
+		vim_free(fudi.fd_newkey);
+		return NULL;
+	    }
+	    else
+		eap->skip = TRUE;
+	}
+
+	// For "export def FuncName()" in an autoload script the function name
+	// is stored with the legacy autoload name "dir#script#FuncName" so
+	// that it can also be found in legacy script.
+	if (is_export && name != NULL)
+	{
+	    char_u *prefixed = may_prefix_autoload(name);
+
+	    if (prefixed != NULL && prefixed != name)
+	    {
+		vim_free(name);
+		name = prefixed;
+	    }
+	}
+	else if (paren && vim9script && name != NULL
+				    && vim_strchr(name, AUTOLOAD_CHAR) != NULL)
+	{
+	    emsg(_(e_cannot_use_name_with_hash_in_vim9_script_use_export_instead));
+	    goto ret_free;
+	}
+    }
+
+    // An error in a function call during evaluation of an expression in magic
+    // braces should not cause the function not to be defined.
+    saved_did_emsg = did_emsg;
+    did_emsg = FALSE;
+
+    /*
+     * ":function func" with only function name: list function.
+     */
+    if (!paren)
+    {
+	if (!ends_excmd(*skipwhite(p)))
+	{
+	    semsg(_(e_trailing_characters_str), p);
+	    goto ret_free;
+	}
+	set_nextcmd(eap, p);
+	if (eap->nextcmd != NULL)
+	    *p = NUL;
+	if (!eap->skip && !got_int)
+	{
+	    fp = find_func(name, is_global);
+	    if (fp == NULL && ASCII_ISUPPER(*eap->arg))
+	    {
+		char_u *up = untrans_function_name(name);
+
+		// With Vim9 script the name was made script-local, if not
+		// found try again with the original name.
+		if (up != NULL)
+		    fp = find_func(up, FALSE);
+	    }
+
+	    if (fp != NULL)
+	    {
+		// Check no function was added or removed from a timer, e.g. at
+		// the more prompt.  "fp" may then be invalid.
+		int prev_ht_changed = func_hashtab.ht_changed;
+
+		if (list_func_head(fp, TRUE) == OK)
+		{
+		    for (j = 0; j < fp->uf_lines.ga_len && !got_int; ++j)
+		    {
+			if (FUNCLINE(fp, j) == NULL)
+			    continue;
+			msg_putchar('\n');
+			msg_outnum((long)(j + 1));
+			if (j < 9)
+			    msg_putchar(' ');
+			if (j < 99)
+			    msg_putchar(' ');
+			if (function_list_modified(prev_ht_changed))
+			    break;
+			msg_prt_line(FUNCLINE(fp, j), FALSE);
+			out_flush();	// show a line at a time
+			ui_breakcheck();
+		    }
+		    if (!got_int)
+		    {
+			msg_putchar('\n');
+			if (!function_list_modified(prev_ht_changed))
+			{
+			    if (fp->uf_def_status != UF_NOT_COMPILED)
+				msg_puts("   enddef");
+			    else
+				msg_puts("   endfunction");
+			}
+		    }
+		}
+	    }
+	    else
+		emsg_funcname(e_undefined_function_str, eap->arg);
+	}
+	goto ret_free;
+    }
+
+    /*
+     * ":function name(arg1, arg2)" Define function.
+     */
+    p = skipwhite(p);
+    if (*p != '(')
+    {
+	if (!eap->skip)
+	{
+	    semsg(_(e_missing_paren_str), eap->arg);
+	    goto ret_free;
+	}
+	// attempt to continue by skipping some text
+	if (vim_strchr(p, '(') != NULL)
+	    p = vim_strchr(p, '(');
+    }
+
+    if ((vim9script || eap->cmdidx == CMD_def) && VIM_ISWHITE(p[-1]))
+    {
+	semsg(_(e_no_white_space_allowed_before_str_str), "(", p - 1);
+	goto ret_free;
+    }
+
+    // In Vim9 script only global functions can be redefined.
+    if (vim9script && eap->forceit && !is_global)
+    {
+	emsg(_(e_no_bang_allowed));
+	goto ret_free;
+    }
+
+    ga_init2(&newlines, sizeof(char_u *), 10);
+
+    if (!eap->skip && name_arg == NULL)
+    {
+	// Check the name of the function.  Unless it's a dictionary function
+	// (that we are overwriting).
+	if (name != NULL)
+	    arg = name;
+	else
+	    arg = fudi.fd_newkey;
+	if (arg != NULL && (fudi.fd_di == NULL
+				     || (fudi.fd_di->di_tv.v_type != VAR_FUNC
+				 && fudi.fd_di->di_tv.v_type != VAR_PARTIAL)))
+	{
+	    char_u  *name_base = arg;
+	    int	    i;
+
+	    if (*arg == K_SPECIAL)
+	    {
+		name_base = vim_strchr(arg, '_');
+		if (name_base == NULL)
+		    name_base = arg + 3;
+		else
+		    ++name_base;
+	    }
+	    for (i = 0; name_base[i] != NUL && (i == 0
+					? eval_isnamec1(name_base[i])
+					: eval_isnamec(name_base[i])); ++i)
+		;
+	    if (name_base[i] != NUL)
+		emsg_funcname(e_invalid_argument_str, arg);
+
+	    // In Vim9 script a function cannot have the same name as a
+	    // variable.
+	    if (vim9script && *arg == K_SPECIAL
+		&& eval_variable(name_base, (int)STRLEN(name_base), 0, NULL,
+		    NULL, EVAL_VAR_NOAUTOLOAD + EVAL_VAR_IMPORT
+						     + EVAL_VAR_NO_FUNC) == OK)
+	    {
+		semsg(_(e_redefining_script_item_str), name_base);
+		goto ret_free;
+	    }
+	}
+	// Disallow using the g: dict.
+	if (fudi.fd_dict != NULL && fudi.fd_dict->dv_scope == VAR_DEF_SCOPE)
+	{
+	    emsg(_(e_cannot_use_g_here));
+	    goto ret_free;
+	}
+    }
+
+    // This may get more lines and make the pointers into the first line
+    // invalid.
+    ++p;
+    if (get_function_args(&p, ')', &newargs,
+			 eap->cmdidx == CMD_def ? &argtypes : NULL, FALSE,
+			 NULL, &varargs, &default_args, eap->skip,
+			 eap, class_flags, &newlines, lines_to_free) == FAIL)
+	goto errret_2;
+    whitep = p;
+
+    if (eap->cmdidx == CMD_def)
+    {
+	// find the return type: :def Func(): type
+	if (*skipwhite(p) == ':')
+	{
+	    if (*p != ':')
+	    {
+		semsg(_(e_no_white_space_allowed_before_colon_str), p);
+		p = skipwhite(p);
+	    }
+	    else if (!IS_WHITE_OR_NUL(p[1]))
+		semsg(_(e_white_space_required_after_str_str), ":", p);
+	    ret_type = skipwhite(p + 1);
+	    p = skip_type(ret_type, FALSE);
+	    if (p > ret_type)
+	    {
+		ret_type = vim_strnsave(ret_type, p - ret_type);
+		whitep = p;
+		p = skipwhite(p);
+	    }
+	    else
+	    {
+		semsg(_(e_expected_type_str), ret_type);
+		ret_type = NULL;
+	    }
+	}
+	p = skipwhite(p);
+    }
+    else
+	// find extra arguments "range", "dict", "abort" and "closure"
+	for (;;)
+	{
+	    whitep = p;
+	    p = skipwhite(p);
+	    if (STRNCMP(p, "range", 5) == 0)
+	    {
+		flags |= FC_RANGE;
+		p += 5;
+	    }
+	    else if (STRNCMP(p, "dict", 4) == 0)
+	    {
+		flags |= FC_DICT;
+		p += 4;
+	    }
+	    else if (STRNCMP(p, "abort", 5) == 0)
+	    {
+		flags |= FC_ABORT;
+		p += 5;
+	    }
+	    else if (STRNCMP(p, "closure", 7) == 0)
+	    {
+		flags |= FC_CLOSURE;
+		p += 7;
+		if (current_funccal == NULL)
+		{
+		    emsg_funcname(e_closure_function_should_not_be_at_top_level_str,
+			    name == NULL ? (char_u *)"" : name);
+		    goto erret;
+		}
+	    }
+	    else
+		break;
+	}
+
+    // When there is a line break use what follows for the function body.
+    // Makes 'exe "func Test()\n...\nendfunc"' work.
+    if (*p == '\n')
+	line_arg = p + 1;
+    else if (*p != NUL
+	    && !(*p == '"' && (!vim9script || eap->cmdidx == CMD_function)
+						     && eap->cmdidx != CMD_def)
+	    && !(VIM_ISWHITE(*whitep) && *p == '#'
+				     && (vim9script || eap->cmdidx == CMD_def))
+	    && !eap->skip
+	    && !did_emsg)
+	semsg(_(e_trailing_characters_str), p);
+
+    /*
+     * Read the body of the function, until "}", ":endfunction" or ":enddef" is
+     * found.
+     */
+    if (KeyTyped)
+    {
+	// Check if the function already exists, don't let the user type the
+	// whole function before telling him it doesn't work!  For a script we
+	// need to skip the body to be able to find what follows.
+	if (!eap->skip && !eap->forceit)
+	{
+	    if (fudi.fd_dict != NULL && fudi.fd_newkey == NULL)
+		emsg(_(e_dictionary_entry_already_exists));
+	    else if (name != NULL && find_func(name, is_global) != NULL)
+		emsg_funcname(e_function_str_already_exists_add_bang_to_replace, name);
+	}
+
+	if (!eap->skip && did_emsg)
+	    goto erret;
+
+	msg_putchar('\n');	    // don't overwrite the function name
+	cmdline_row = msg_row;
+    }
+
+    // Save the starting line number.
+    sourcing_lnum_top = SOURCING_LNUM;
+
+    // Do not define the function when getting the body fails and when
+    // skipping.
+    if (((class_flags & CF_INTERFACE) == 0
+		&& get_function_body(eap, &newlines, line_arg, lines_to_free)
+								       == FAIL)
+	    || eap->skip)
+	goto erret;
+
+    /*
+     * If there are no errors, add the function
+     */
+    if (fudi.fd_dict != NULL)
+    {
+	char	numbuf[20];
+
+	fp = NULL;
+	if (fudi.fd_newkey == NULL && !eap->forceit)
+	{
+	    emsg(_(e_dictionary_entry_already_exists));
+	    goto erret;
+	}
+	if (fudi.fd_di == NULL)
+	{
+	    // Can't add a function to a locked dictionary
+	    if (value_check_lock(fudi.fd_dict->dv_lock, eap->arg, FALSE))
+		goto erret;
+	}
+	    // Can't change an existing function if it is locked
+	else if (value_check_lock(fudi.fd_di->di_tv.v_lock, eap->arg, FALSE))
+	    goto erret;
+
+	// Give the function a sequential number.  Can only be used with a
+	// Funcref!
+	vim_free(name);
+	sprintf(numbuf, "%d", ++func_nr);
+	name = vim_strsave((char_u *)numbuf);
+	if (name == NULL)
+	    goto erret;
+    }
+    else if (class_flags == 0)
+    {
+	hashtab_T	*ht;
+	char_u		*find_name = name;
+	int		var_conflict = FALSE;
+	int		ffed_flags = is_global ? FFED_IS_GLOBAL : 0;
+
+	v = find_var(name, &ht, TRUE);
+	if (v != NULL && (vim9script || v->di_tv.v_type == VAR_FUNC))
+	    var_conflict = TRUE;
+
+	if (SCRIPT_ID_VALID(current_sctx.sc_sid))
+	{
+	    scriptitem_T *si = SCRIPT_ITEM(current_sctx.sc_sid);
+
+	    if (si->sn_autoload_prefix != NULL)
+	    {
+		if (is_export)
+		{
+		    find_name = name + STRLEN(si->sn_autoload_prefix);
+		    v = find_var(find_name, &ht, TRUE);
+		    if (v != NULL)
+			var_conflict = TRUE;
+		    // Only check if the function already exists in the script,
+		    // global functions can be shadowed.
+		    ffed_flags |= FFED_NO_GLOBAL;
+		}
+		else
+		{
+		    char_u *prefixed = may_prefix_autoload(name);
+
+		    if (prefixed != NULL && prefixed != name)
+		    {
+			v = find_var(prefixed, &ht, TRUE);
+			if (v != NULL)
+			    var_conflict = TRUE;
+			vim_free(prefixed);
+		    }
+		}
+	    }
+	}
+	if (var_conflict)
+	{
+	    emsg_funcname(e_function_name_conflicts_with_variable_str, name);
+	    goto erret;
+	}
+
+	fp = find_func_even_dead(find_name, ffed_flags);
+	if (vim9script)
+	{
+	    char_u *uname = untrans_function_name(name);
+
+	    import = find_imported(uname == NULL ? name : uname, 0, FALSE);
+	}
+
+	if (fp != NULL || import != NULL)
+	{
+	    int dead = fp != NULL && (fp->uf_flags & FC_DEAD);
+
+	    // Function can be replaced with "function!" and when sourcing the
+	    // same script again, but only once.
+	    // A name that is used by an import can not be overruled.
+	    if (import != NULL
+		    || (!dead && !eap->forceit
+			&& (fp->uf_script_ctx.sc_sid != current_sctx.sc_sid
+			  || fp->uf_script_ctx.sc_seq == current_sctx.sc_seq)))
+	    {
+		SOURCING_LNUM = sourcing_lnum_top;
+		if (vim9script)
+		    emsg_funcname(e_name_already_defined_str, name);
+		else
+		    emsg_funcname(e_function_str_already_exists_add_bang_to_replace, name);
+		goto erret;
+	    }
+	    if (fp->uf_calls > 0)
+	    {
+		emsg_funcname(
+			    e_cannot_redefine_function_str_it_is_in_use, name);
+		goto erret;
+	    }
+	    if (fp->uf_refcount > 1)
+	    {
+		// This function is referenced somewhere, don't redefine it but
+		// create a new one.
+		--fp->uf_refcount;
+		fp->uf_flags |= FC_REMOVED;
+		fp = NULL;
+		overwrite = TRUE;
+	    }
+	    else
+	    {
+		char_u *exp_name = fp->uf_name_exp;
+
+		// redefine existing function, keep the expanded name
+		VIM_CLEAR(name);
+		fp->uf_name_exp = NULL;
+		func_clear_items(fp);
+		fp->uf_name_exp = exp_name;
+		fp->uf_flags &= ~FC_DEAD;
+#ifdef FEAT_PROFILE
+		fp->uf_profiling = FALSE;
+		fp->uf_prof_initialized = FALSE;
+#endif
+		fp->uf_def_status = UF_NOT_COMPILED;
+	    }
+	}
+    }
+
+    if (fp == NULL)
+    {
+	if (fudi.fd_dict == NULL && vim_strchr(name, AUTOLOAD_CHAR) != NULL)
+	{
+	    int	    slen, plen;
+	    char_u  *scriptname;
+
+	    // Check that the autoload name matches the script name.
+	    j = FAIL;
+	    if (SOURCING_NAME != NULL)
+	    {
+		scriptname = autoload_name(name);
+		if (scriptname != NULL)
+		{
+		    p = vim_strchr(scriptname, '/');
+		    plen = (int)STRLEN(p);
+		    slen = (int)STRLEN(SOURCING_NAME);
+		    if (slen > plen && fnamecmp(p,
+					    SOURCING_NAME + slen - plen) == 0)
+			j = OK;
+		    vim_free(scriptname);
+		}
+	    }
+	    if (j == FAIL)
+	    {
+		linenr_T save_lnum = SOURCING_LNUM;
+
+		SOURCING_LNUM = sourcing_lnum_top;
+		semsg(_(e_function_name_does_not_match_script_file_name_str),
+									 name);
+		SOURCING_LNUM = save_lnum;
+		goto erret;
+	    }
+	}
+
+	fp = alloc_ufunc(name);
+	if (fp == NULL)
+	    goto erret;
+	fp_allocated = TRUE;
+
+	if (fudi.fd_dict != NULL)
+	{
+	    if (fudi.fd_di == NULL)
+	    {
+		// add new dict entry
+		fudi.fd_di = dictitem_alloc(fudi.fd_newkey);
+		if (fudi.fd_di == NULL)
+		{
+		    vim_free(fp);
+		    fp = NULL;
+		    goto erret;
+		}
+		if (dict_add(fudi.fd_dict, fudi.fd_di) == FAIL)
+		{
+		    vim_free(fudi.fd_di);
+		    vim_free(fp);
+		    fp = NULL;
+		    goto erret;
+		}
+	    }
+	    else
+		// overwrite existing dict entry
+		clear_tv(&fudi.fd_di->di_tv);
+	    fudi.fd_di->di_tv.v_type = VAR_FUNC;
+	    fudi.fd_di->di_tv.vval.v_string = vim_strsave(name);
+
+	    // behave like "dict" was used
+	    flags |= FC_DICT;
+	}
+    }
+    fp->uf_args = newargs;
+    fp->uf_def_args = default_args;
+    fp->uf_ret_type = &t_any;
+    fp->uf_func_type = &t_func_any;
+
+    if (eap->cmdidx == CMD_def)
+    {
+	int	    lnum_save = SOURCING_LNUM;
+	cstack_T    *cstack = eap->cstack;
+
+	fp->uf_def_status = UF_TO_BE_COMPILED;
+
+	// error messages are for the first function line
+	SOURCING_LNUM = sourcing_lnum_top;
+
+	// The function may use script variables from the context.
+	function_using_block_scopes(fp, cstack);
+
+	if (parse_argument_types(fp, &argtypes, varargs) == FAIL)
+	{
+	    SOURCING_LNUM = lnum_save;
+	    free_fp = fp_allocated;
+	    goto erret;
+	}
+	varargs = FALSE;
+
+	// parse the return type, if any
+	if (parse_return_type(fp, ret_type) == FAIL)
+	{
+	    SOURCING_LNUM = lnum_save;
+	    free_fp = fp_allocated;
+	    goto erret;
+	}
+	SOURCING_LNUM = lnum_save;
+    }
+    else
+	fp->uf_def_status = UF_NOT_COMPILED;
+
+    if (fp_allocated)
+    {
+	// insert the new function in the function list
+	set_ufunc_name(fp, name);
+	if (overwrite)
+	{
+	    hi = hash_find(&func_hashtab, name);
+	    hi->hi_key = UF2HIKEY(fp);
+	}
+	else if (class_flags == 0 && hash_add(&func_hashtab,
+					 UF2HIKEY(fp), "add function") == FAIL)
+	{
+	    free_fp = TRUE;
+	    goto erret;
+	}
+	fp->uf_refcount = 1;
+    }
+
+    fp->uf_lines = newlines;
+    newlines.ga_data = NULL;
+    if ((flags & FC_CLOSURE) != 0)
+    {
+	if (register_closure(fp) == FAIL)
+	    goto erret;
+    }
+    else
+	fp->uf_scoped = NULL;
+
+#ifdef FEAT_PROFILE
+    if (prof_def_func())
+	func_do_profile(fp);
+#endif
+    fp->uf_varargs = varargs;
+    if (sandbox)
+	flags |= FC_SANDBOX;
+    if (vim9script && !ASCII_ISUPPER(*fp->uf_name))
+	flags |= FC_VIM9;
+    fp->uf_flags = flags;
+    fp->uf_calls = 0;
+    fp->uf_cleared = FALSE;
+    fp->uf_script_ctx = current_sctx;
+    fp->uf_script_ctx_version = current_sctx.sc_version;
+    fp->uf_script_ctx.sc_lnum += sourcing_lnum_top;
+    if (is_export)
+    {
+	fp->uf_flags |= FC_EXPORT;
+	// let do_one_cmd() know the export worked.
+	is_export = FALSE;
+    }
+
+    if (eap->cmdidx == CMD_def)
+	set_function_type(fp);
+    else if (fp->uf_script_ctx.sc_version == SCRIPT_VERSION_VIM9)
+	// :func does not use Vim9 script syntax, even in a Vim9 script file
+	fp->uf_script_ctx.sc_version = SCRIPT_VERSION_MAX;
+
+    goto ret_free;
+
+erret:
+    if (fp != NULL)
+    {
+	// these were set to "newargs" and "default_args", which are cleared
+	// below
+	ga_init(&fp->uf_args);
+	ga_init(&fp->uf_def_args);
+    }
+errret_2:
+    ga_clear_strings(&newargs);
+    ga_clear_strings(&default_args);
+    ga_clear_strings(&newlines);
+    if (fp != NULL)
+    {
+	VIM_CLEAR(fp->uf_arg_types);
+	VIM_CLEAR(fp->uf_va_name);
+	clear_type_list(&fp->uf_type_list);
+    }
+    if (free_fp)
+    {
+	vim_free(fp);
+	fp = NULL;
+    }
+ret_free:
+    ga_clear_strings(&argtypes);
+    vim_free(fudi.fd_newkey);
+    if (name != name_arg)
+	vim_free(name);
+    vim_free(ret_type);
+    did_emsg |= saved_did_emsg;
+
+    return fp;
+}
+
+/*
+ * ":function"
+ */
+    void
+ex_function(exarg_T *eap)
+{
+    garray_T lines_to_free;
+
+    ga_init2(&lines_to_free, sizeof(char_u *), 50);
+    (void)define_function(eap, NULL, &lines_to_free, 0);
+    ga_clear_strings(&lines_to_free);
+}
+
+/*
+ * Find a function by name, including "<lambda>123".
+ * Check for "profile" and "debug" arguments and set"compile_type".
+ * Caller should initialize "compile_type" to CT_NONE.
+ * Return NULL if not found.
+ */
+    ufunc_T *
+find_func_by_name(char_u *name, compiletype_T *compile_type)
+{
+    char_u	*arg = name;
+    char_u	*fname;
+    ufunc_T	*ufunc;
+    int		is_global = FALSE;
+
+    if (STRNCMP(arg, "profile", 7) == 0 && VIM_ISWHITE(arg[7]))
+    {
+	*compile_type = CT_PROFILE;
+	arg = skipwhite(arg + 7);
+    }
+    else if (STRNCMP(arg, "debug", 5) == 0 && VIM_ISWHITE(arg[5]))
+    {
+	*compile_type = CT_DEBUG;
+	arg = skipwhite(arg + 5);
+    }
+
+    if (STRNCMP(arg, "<lambda>", 8) == 0)
+    {
+	arg += 8;
+	(void)getdigits(&arg);
+	fname = vim_strnsave(name, arg - name);
+    }
+    else
+    {
+	// First try finding a method in a class, trans_function_name() will
+	// give an error if the function is not found.
+	ufunc = find_class_func(&arg);
+	if (ufunc != NULL)
+	    return ufunc;
+
+	fname = trans_function_name_ext(&arg, &is_global, FALSE,
+		      TFN_INT | TFN_QUIET | TFN_NO_AUTOLOAD | TFN_NO_DECL,
+		      NULL, NULL, NULL, &ufunc);
+	if (ufunc != NULL)
+	{
+	    vim_free(fname);
+	    return ufunc;
+	}
+    }
+    if (fname == NULL)
+    {
+	semsg(_(e_invalid_argument_str), name);
+	return NULL;
+    }
+    if (!ends_excmd2(name, arg))
+    {
+	vim_free(fname);
+	emsg(ex_errmsg(e_trailing_characters_str, arg));
+	return NULL;
+    }
+
+    ufunc = find_func(fname, is_global);
+    if (ufunc == NULL)
+    {
+	char_u *p = untrans_function_name(fname);
+
+	if (p != NULL)
+	    // Try again without making it script-local.
+	    ufunc = find_func(p, FALSE);
+    }
+    vim_free(fname);
+    if (ufunc == NULL)
+	semsg(_(e_cannot_find_function_str), name);
+    return ufunc;
+}
+
+/*
+ * :defcompile - compile all :def functions in the current script that need to
+ * be compiled or the one specified by the argument.
+ * Skips dead functions.  Doesn't do profiling.
+ */
+    void
+ex_defcompile(exarg_T *eap)
+{
+    if (*eap->arg != NUL)
+    {
+	compiletype_T compile_type = CT_NONE;
+	ufunc_T *ufunc = find_func_by_name(eap->arg, &compile_type);
+	if (ufunc != NULL)
+	{
+	    if (func_needs_compiling(ufunc, compile_type))
+		(void)compile_def_function(ufunc, FALSE, compile_type, NULL);
+	    else
+		smsg(_("Function %s does not need compiling"), eap->arg);
+	}
+    }
+    else
+    {
+	long	todo = (long)func_hashtab.ht_used;
+	int		changed = func_hashtab.ht_changed;
+	hashitem_T	*hi;
+
+	for (hi = func_hashtab.ht_array; todo > 0 && !got_int; ++hi)
+	{
+	    if (!HASHITEM_EMPTY(hi))
+	    {
+		--todo;
+		ufunc_T *ufunc = HI2UF(hi);
+		if (ufunc->uf_script_ctx.sc_sid == current_sctx.sc_sid
+			&& ufunc->uf_def_status == UF_TO_BE_COMPILED
+			&& (ufunc->uf_flags & FC_DEAD) == 0)
+		{
+		    (void)compile_def_function(ufunc, FALSE, CT_NONE, NULL);
+
+		    if (func_hashtab.ht_changed != changed)
+		    {
+			// a function has been added or removed, need to start
+			// over
+			todo = (long)func_hashtab.ht_used;
+			changed = func_hashtab.ht_changed;
+			hi = func_hashtab.ht_array;
+			--hi;
+		    }
+		}
+	    }
+	}
+    }
+}
+
+/*
+ * Return 5 if "p" starts with "<SID>" or "<SNR>" (ignoring case).
+ * Return 2 if "p" starts with "s:".
+ * Return 0 otherwise.
+ */
+    int
+eval_fname_script(char_u *p)
+{
+    // Use MB_STRICMP() because in Turkish comparing the "I" may not work with
+    // the standard library function.
+    if (p[0] == '<' && (MB_STRNICMP(p + 1, "SID>", 4) == 0
+				       || MB_STRNICMP(p + 1, "SNR>", 4) == 0))
+	return 5;
+    if (p[0] == 's' && p[1] == ':')
+	return 2;
+    return 0;
+}
+
+    int
+translated_function_exists(char_u *name, int is_global)
+{
+    if (builtin_function(name, -1))
+	return has_internal_func(name);
+    return find_func(name, is_global) != NULL;
+}
+
+/*
+ * Return TRUE when "ufunc" has old-style "..." varargs
+ * or named varargs "...name: type".
+ */
+    int
+has_varargs(ufunc_T *ufunc)
+{
+    return ufunc->uf_varargs || ufunc->uf_va_name != NULL;
+}
+
+/*
+ * Return TRUE if a function "name" exists.
+ * If "no_defef" is TRUE, do not dereference a Funcref.
+ */
+    int
+function_exists(char_u *name, int no_deref)
+{
+    char_u  *nm = name;
+    char_u  *p;
+    int	    n = FALSE;
+    int	    flag;
+    int	    is_global = FALSE;
+
+    flag = TFN_INT | TFN_QUIET | TFN_NO_AUTOLOAD;
+    if (no_deref)
+	flag |= TFN_NO_DEREF;
+    p = trans_function_name(&nm, &is_global, FALSE, flag);
+    nm = skipwhite(nm);
+
+    // Only accept "funcname", "funcname ", "funcname (..." and
+    // "funcname(...", not "funcname!...".
+    if (p != NULL && (*nm == NUL || *nm == '('))
+	n = translated_function_exists(p, is_global);
+    vim_free(p);
+    return n;
+}
+
+#if defined(FEAT_PYTHON) || defined(FEAT_PYTHON3) || defined(PROTO)
+    char_u *
+get_expanded_name(char_u *name, int check)
+{
+    char_u	*nm = name;
+    char_u	*p;
+    int		is_global = FALSE;
+
+    p = trans_function_name(&nm, &is_global, FALSE, TFN_INT|TFN_QUIET);
+
+    if (p != NULL && *nm == NUL
+		       && (!check || translated_function_exists(p, is_global)))
+	return p;
+
+    vim_free(p);
+    return NULL;
+}
+#endif
+
+/*
+ * Function given to ExpandGeneric() to obtain the list of user defined
+ * function names.
+ */
+    char_u *
+get_user_func_name(expand_T *xp, int idx)
+{
+    static long_u	done;
+    static int		changed;
+    static hashitem_T	*hi;
+    ufunc_T		*fp;
+
+    if (idx == 0)
+    {
+	done = 0;
+	hi = func_hashtab.ht_array;
+	changed = func_hashtab.ht_changed;
+    }
+    if (changed == func_hashtab.ht_changed && done < func_hashtab.ht_used)
+    {
+	if (done++ > 0)
+	    ++hi;
+	while (HASHITEM_EMPTY(hi))
+	    ++hi;
+	fp = HI2UF(hi);
+
+	// don't show dead, dict and lambda functions
+	if ((fp->uf_flags & FC_DEAD) || (fp->uf_flags & FC_DICT)
+				|| STRNCMP(fp->uf_name, "<lambda>", 8) == 0)
+	    return (char_u *)"";
+
+	if (STRLEN(fp->uf_name) + 4 >= IOSIZE)
+	    return fp->uf_name;	// prevents overflow
+
+	cat_func_name(IObuff, fp);
+	if (xp->xp_context != EXPAND_USER_FUNC
+				       && xp->xp_context != EXPAND_DISASSEMBLE)
+	{
+	    STRCAT(IObuff, "(");
+	    if (!has_varargs(fp) && fp->uf_args.ga_len == 0)
+		STRCAT(IObuff, ")");
+	}
+	return IObuff;
+    }
+    return NULL;
+}
+
+/*
+ * Make a copy of a function.
+ * Intended to be used for a function defined on a base class that has a copy
+ * on the child class.
+ * The copy has uf_refcount set to one.
+ * Returns NULL when out of memory.
+ */
+    ufunc_T *
+copy_function(ufunc_T *fp)
+{
+    ufunc_T *ufunc = alloc_ufunc(fp->uf_name);
+    if (ufunc == NULL)
+	return NULL;
+
+    // Most things can just be copied.
+    *ufunc = *fp;
+
+    ufunc->uf_def_status = UF_TO_BE_COMPILED;
+    ufunc->uf_dfunc_idx = 0;
+    ufunc->uf_class = NULL;
+
+    ga_copy_strings(&fp->uf_args, &ufunc->uf_args);
+    ga_copy_strings(&fp->uf_def_args, &ufunc->uf_def_args);
+
+    if (ufunc->uf_arg_types != NULL)
+    {
+	// "uf_arg_types" is an allocated array, make a copy.
+	type_T **at = ALLOC_CLEAR_MULT(type_T *, ufunc->uf_args.ga_len);
+	if (at != NULL)
+	{
+	    mch_memmove(at, ufunc->uf_arg_types,
+				     sizeof(type_T *) * ufunc->uf_args.ga_len);
+	    ufunc->uf_arg_types = at;
+	}
+    }
+
+    // TODO: how about the types themselves? they can be freed when the
+    // original function is freed:
+    //    type_T	**uf_arg_types;
+    //    type_T	*uf_ret_type;
+
+    ufunc->uf_type_list.ga_len = 0;
+    ufunc->uf_type_list.ga_data = NULL;
+
+    // TODO:   partial_T	*uf_partial;
+
+    if (ufunc->uf_va_name != NULL)
+	ufunc->uf_va_name = vim_strsave(ufunc->uf_va_name);
+
+    // TODO:
+    //    type_T	*uf_va_type;
+    //    type_T	*uf_func_type;
+
+    ufunc->uf_block_depth = 0;
+    ufunc->uf_block_ids = NULL;
+
+    ga_copy_strings(&fp->uf_lines, &ufunc->uf_lines);
+
+    ufunc->uf_refcount = 1;
+    ufunc->uf_name_exp = NULL;
+    STRCPY(ufunc->uf_name, fp->uf_name);
+
+    return ufunc;
+}
+
+/*
+ * ":delfunction {name}"
+ */
+    void
+ex_delfunction(exarg_T *eap)
+{
+    ufunc_T	*fp = NULL;
+    char_u	*p;
+    char_u	*name;
+    funcdict_T	fudi;
+    int		is_global = FALSE;
+
+    p = eap->arg;
+    name = trans_function_name_ext(&p, &is_global, eap->skip, 0, &fudi,
+							     NULL, NULL, NULL);
+    vim_free(fudi.fd_newkey);
+    if (name == NULL)
+    {
+	if (fudi.fd_dict != NULL && !eap->skip)
+	    emsg(_(e_funcref_required));
+	return;
+    }
+    if (!ends_excmd(*skipwhite(p)))
+    {
+	vim_free(name);
+	semsg(_(e_trailing_characters_str), p);
+	return;
+    }
+    set_nextcmd(eap, p);
+    if (eap->nextcmd != NULL)
+	*p = NUL;
+
+    if (numbered_function(name) && fudi.fd_dict == NULL)
+    {
+	if (!eap->skip)
+	    semsg(_(e_invalid_argument_str), eap->arg);
+	vim_free(name);
+	return;
+    }
+    if (!eap->skip)
+	fp = find_func(name, is_global);
+    vim_free(name);
+
+    if (!eap->skip)
+    {
+	if (fp == NULL)
+	{
+	    if (!eap->forceit)
+		semsg(_(e_unknown_function_str), eap->arg);
+	    return;
+	}
+	if (fp->uf_calls > 0)
+	{
+	    semsg(_(e_cannot_delete_function_str_it_is_in_use), eap->arg);
+	    return;
+	}
+	if (fp->uf_flags & FC_VIM9)
+	{
+	    semsg(_(e_cannot_delete_vim9_script_function_str), eap->arg);
+	    return;
+	}
+
+	if (fudi.fd_dict != NULL)
+	{
+	    // Delete the dict item that refers to the function, it will
+	    // invoke func_unref() and possibly delete the function.
+	    dictitem_remove(fudi.fd_dict, fudi.fd_di, "delfunction");
+	}
+	else
+	{
+	    // A normal function (not a numbered function or lambda) has a
+	    // refcount of 1 for the entry in the hashtable.  When deleting
+	    // it and the refcount is more than one, it should be kept.
+	    // A numbered function and lambda should be kept if the refcount is
+	    // one or more.
+	    if (fp->uf_refcount > (func_name_refcount(fp->uf_name) ? 0 : 1))
+	    {
+		// Function is still referenced somewhere.  Don't free it but
+		// do remove it from the hashtable.
+		if (func_remove(fp))
+		    fp->uf_refcount--;
+	    }
+	    else
+		func_clear_free(fp, FALSE);
+	}
+    }
+}
+
+/*
+ * Unreference a Function: decrement the reference count and free it when it
+ * becomes zero.
+ */
+    void
+func_unref(char_u *name)
+{
+    ufunc_T *fp = NULL;
+
+    if (name == NULL || !func_name_refcount(name))
+	return;
+    fp = find_func(name, FALSE);
+    if (fp == NULL && numbered_function(name))
+    {
+#ifdef EXITFREE
+	if (!entered_free_all_mem)
+#endif
+	    internal_error("func_unref()");
+    }
+    func_ptr_unref(fp);
+}
+
+/*
+ * Unreference a Function: decrement the reference count and free it when it
+ * becomes zero.
+ * Also when it becomes one and uf_partial points to the function.
+ */
+    void
+func_ptr_unref(ufunc_T *fp)
+{
+    if (fp != NULL && (--fp->uf_refcount <= 0
+		|| (fp->uf_refcount == 1 && fp->uf_partial != NULL
+					 && fp->uf_partial->pt_refcount <= 1
+					 && fp->uf_partial->pt_func == fp)))
+    {
+	// Only delete it when it's not being used.  Otherwise it's done
+	// when "uf_calls" becomes zero.
+	if (fp->uf_calls == 0)
+	    func_clear_free(fp, FALSE);
+    }
+}
+
+/*
+ * Count a reference to a Function.
+ */
+    void
+func_ref(char_u *name)
+{
+    ufunc_T *fp;
+
+    if (name == NULL || !func_name_refcount(name))
+	return;
+    fp = find_func(name, FALSE);
+    if (fp != NULL)
+	++fp->uf_refcount;
+    else if (numbered_function(name))
+	// Only give an error for a numbered function.
+	// Fail silently, when named or lambda function isn't found.
+	internal_error("func_ref()");
+}
+
+/*
+ * Count a reference to a Function.
+ */
+    void
+func_ptr_ref(ufunc_T *fp)
+{
+    if (fp != NULL)
+	++fp->uf_refcount;
+}
+
+/*
+ * Return TRUE if items in "fc" do not have "copyID".  That means they are not
+ * referenced from anywhere that is in use.
+ */
+    static int
+can_free_funccal(funccall_T *fc, int copyID)
+{
+    return (fc->fc_l_varlist.lv_copyID != copyID
+	    && fc->fc_l_vars.dv_copyID != copyID
+	    && fc->fc_l_avars.dv_copyID != copyID
+	    && fc->fc_copyID != copyID);
+}
+
+/*
+ * ":return [expr]"
+ */
+    void
+ex_return(exarg_T *eap)
+{
+    char_u	*arg = eap->arg;
+    typval_T	rettv;
+    int		returning = FALSE;
+    evalarg_T	evalarg;
+
+    if (current_funccal == NULL)
+    {
+	emsg(_(e_return_not_inside_function));
+	return;
+    }
+
+    init_evalarg(&evalarg);
+    evalarg.eval_flags = eap->skip ? 0 : EVAL_EVALUATE;
+
+    if (eap->skip)
+	++emsg_skip;
+
+    eap->nextcmd = NULL;
+    if ((*arg != NUL && *arg != '|' && *arg != '\n')
+				  && eval0(arg, &rettv, eap, &evalarg) != FAIL)
+    {
+	if (!eap->skip)
+	    returning = do_return(eap, FALSE, TRUE, &rettv);
+	else
+	    clear_tv(&rettv);
+    }
+    // It's safer to return also on error.
+    else if (!eap->skip)
+    {
+	// In return statement, cause_abort should be force_abort.
+	update_force_abort();
+
+	/*
+	 * Return unless the expression evaluation has been cancelled due to an
+	 * aborting error, an interrupt, or an exception.
+	 */
+	if (!aborting())
+	    returning = do_return(eap, FALSE, TRUE, NULL);
+    }
+
+    // When skipping or the return gets pending, advance to the next command
+    // in this line (!returning).  Otherwise, ignore the rest of the line.
+    // Following lines will be ignored by get_func_line().
+    if (returning)
+	eap->nextcmd = NULL;
+    else if (eap->nextcmd == NULL)	    // no argument
+	set_nextcmd(eap, arg);
+
+    if (eap->skip)
+	--emsg_skip;
+    clear_evalarg(&evalarg, eap);
+}
+
+    static int
+ex_call_inner(
+	exarg_T	    *eap,
+	char_u	    *name,
+	char_u	    **arg,
+	char_u	    *startarg,
+	funcexe_T  *funcexe_init,
+	evalarg_T   *evalarg)
+{
+    linenr_T	lnum;
+    int		doesrange;
+    typval_T	rettv;
+    int		failed = FALSE;
+
+    /*
+     * When skipping, evaluate the function once, to find the end of the
+     * arguments.
+     * When the function takes a range, this is discovered after the first
+     * call, and the loop is broken.
+     */
+    if (eap->skip)
+    {
+	++emsg_skip;
+	lnum = eap->line2;	// do it once, also with an invalid range
+    }
+    else
+	lnum = eap->line1;
+    for ( ; lnum <= eap->line2; ++lnum)
+    {
+	funcexe_T funcexe;
+
+	if (!eap->skip && eap->addr_count > 0)
+	{
+	    if (lnum > curbuf->b_ml.ml_line_count)
+	    {
+		// If the function deleted lines or switched to another buffer
+		// the line number may become invalid.
+		emsg(_(e_invalid_range));
+		break;
+	    }
+	    curwin->w_cursor.lnum = lnum;
+	    curwin->w_cursor.col = 0;
+	    curwin->w_cursor.coladd = 0;
+	}
+	*arg = startarg;
+
+	funcexe = *funcexe_init;
+	funcexe.fe_doesrange = &doesrange;
+	rettv.v_type = VAR_UNKNOWN;	// clear_tv() uses this
+	if (get_func_tv(name, -1, &rettv, arg, evalarg, &funcexe) == FAIL)
+	{
+	    failed = TRUE;
+	    break;
+	}
+	if (has_watchexpr())
+	    dbg_check_breakpoint(eap);
+
+	// Handle a function returning a Funcref, Dictionary or List.
+	if (handle_subscript(arg, NULL, &rettv,
+			   eap->skip ? NULL : &EVALARG_EVALUATE, TRUE) == FAIL)
+	{
+	    failed = TRUE;
+	    break;
+	}
+
+	clear_tv(&rettv);
+	if (doesrange || eap->skip)
+	    break;
+
+	// Stop when immediately aborting on error, or when an interrupt
+	// occurred or an exception was thrown but not caught.
+	// get_func_tv() returned OK, so that the check for trailing
+	// characters below is executed.
+	if (aborting())
+	    break;
+    }
+    if (eap->skip)
+	--emsg_skip;
+    return failed;
+}
+
+/*
+ * Core part of ":defer func(arg)".  "arg" points to the "(" and is advanced.
+ * Returns FAIL or OK.
+ */
+    static int
+ex_defer_inner(
+	char_u	    *name,
+	char_u	    **arg,
+	type_T	    *type,
+	partial_T   *partial,
+	evalarg_T   *evalarg)
+{
+    typval_T	argvars[MAX_FUNC_ARGS + 1];	// vars for arguments
+    int		partial_argc = 0;		// number of partial arguments
+    int		argcount = 0;			// number of arguments found
+    int		r;
+
+    if (current_funccal == NULL)
+    {
+	semsg(_(e_str_not_inside_function), "defer");
+	return FAIL;
+    }
+    if (partial != NULL)
+    {
+	if (partial->pt_dict != NULL)
+	{
+	    emsg(_(e_cannot_use_partial_with_dictionary_for_defer));
+	    return FAIL;
+	}
+	if (partial->pt_argc > 0)
+	{
+	    int i;
+
+	    partial_argc = partial->pt_argc;
+	    for (i = 0; i < partial_argc; ++i)
+		copy_tv(&partial->pt_argv[i], &argvars[i]);
+	}
+    }
+    r = get_func_arguments(arg, evalarg, FALSE,
+					    argvars + partial_argc, &argcount);
+    argcount += partial_argc;
+
+    if (r == OK)
+    {
+	if (type != NULL)
+	{
+	    // Check that the arguments are OK for the types of the funcref.
+	    r = check_argument_types(type, argvars, argcount, NULL, name);
+	}
+	else if (builtin_function(name, -1))
+	{
+	    int idx = find_internal_func(name);
+
+	    if (idx < 0)
+	    {
+		emsg_funcname(e_unknown_function_str, name);
+		r = FAIL;
+	    }
+	    else if (check_internal_func(idx, argcount) == -1)
+		r = FAIL;
+	}
+	else
+	{
+	    ufunc_T *ufunc = find_func(name, FALSE);
+
+	    // we tolerate an unknown function here, it might be defined later
+	    if (ufunc != NULL)
+	    {
+		funcerror_T error = check_user_func_argcount(ufunc, argcount);
+		if (error != FCERR_UNKNOWN)
+		{
+		    user_func_error(error, name, FALSE);
+		    r = FAIL;
+		}
+	    }
+	}
+    }
+
+    if (r == FAIL)
+    {
+	while (--argcount >= 0)
+	    clear_tv(&argvars[argcount]);
+	return FAIL;
+    }
+    return add_defer(name, argcount, argvars);
+}
+
+/*
+ * Return TRUE if currently inside a function call.
+ * Give an error message and return FALSE when not.
+ */
+    int
+can_add_defer(void)
+{
+    if (!in_def_function() && get_current_funccal() == NULL)
+    {
+	semsg(_(e_str_not_inside_function), "defer");
+	return FALSE;
+    }
+    return TRUE;
+}
+
+/*
+ * Add a deferred call for "name" with arguments "argvars[argcount]".
+ * Consumes "argvars[]".
+ * Caller must check that in_def_function() returns TRUE or current_funccal is
+ * not NULL.
+ * Returns OK or FAIL.
+ */
+    int
+add_defer(char_u *name, int argcount_arg, typval_T *argvars)
+{
+    char_u	*saved_name = vim_strsave(name);
+    int		argcount = argcount_arg;
+    defer_T	*dr;
+    int		ret = FAIL;
+
+    if (saved_name == NULL)
+	goto theend;
+    if (in_def_function())
+    {
+	if (add_defer_function(saved_name, argcount, argvars) == OK)
+	    argcount = 0;
+    }
+    else
+    {
+	if (current_funccal->fc_defer.ga_itemsize == 0)
+	    ga_init2(&current_funccal->fc_defer, sizeof(defer_T), 10);
+	if (ga_grow(&current_funccal->fc_defer, 1) == FAIL)
+	    goto theend;
+	dr = ((defer_T *)current_funccal->fc_defer.ga_data)
+					  + current_funccal->fc_defer.ga_len++;
+	dr->dr_name = saved_name;
+	dr->dr_argcount = argcount;
+	while (argcount > 0)
+	{
+	    --argcount;
+	    dr->dr_argvars[argcount] = argvars[argcount];
+	}
+    }
+    ret = OK;
+
+theend:
+    while (--argcount >= 0)
+	clear_tv(&argvars[argcount]);
+    return ret;
+}
+
+/*
+ * Invoked after a functions has finished: invoke ":defer" functions.
+ */
+    static void
+handle_defer_one(funccall_T *funccal)
+{
+    int	    idx;
+
+    for (idx = funccal->fc_defer.ga_len - 1; idx >= 0; --idx)
+    {
+	funcexe_T   funcexe;
+	typval_T    rettv;
+	defer_T	    *dr = ((defer_T *)funccal->fc_defer.ga_data) + idx;
+	int	    i;
+
+	CLEAR_FIELD(funcexe);
+	funcexe.fe_evaluate = TRUE;
+
+	rettv.v_type = VAR_UNKNOWN;	// clear_tv() uses this
+	call_func(dr->dr_name, -1, &rettv,
+				    dr->dr_argcount, dr->dr_argvars, &funcexe);
+	clear_tv(&rettv);
+	vim_free(dr->dr_name);
+	for (i = dr->dr_argcount - 1; i >= 0; --i)
+	    clear_tv(&dr->dr_argvars[i]);
+    }
+    ga_clear(&funccal->fc_defer);
+}
+
+/*
+ * Called when exiting: call all defer functions.
+ */
+    void
+invoke_all_defer(void)
+{
+    funccall_T *funccal;
+
+    for (funccal = current_funccal; funccal != NULL;
+						  funccal = funccal->fc_caller)
+	if (funccal->fc_ectx != NULL)
+	{
+	    // :def function
+	    unwind_def_callstack(funccal->fc_ectx);
+	    may_invoke_defer_funcs(funccal->fc_ectx);
+	}
+	else
+	{
+	    // legacy function
+	    handle_defer_one(funccal);
+	}
+}
+
+/*
+ * ":1,25call func(arg1, arg2)"	function call.
+ * ":defer func(arg1, arg2)"    deferred function call.
+ */
+    void
+ex_call(exarg_T *eap)
+{
+    char_u	*arg = eap->arg;
+    char_u	*startarg;
+    char_u	*name;
+    char_u	*tofree;
+    int		len;
+    int		failed = FALSE;
+    funcdict_T	fudi;
+    partial_T	*partial = NULL;
+    evalarg_T	evalarg;
+    type_T	*type = NULL;
+    int		found_var = FALSE;
+    int		vim9script = in_vim9script();
+
+    fill_evalarg_from_eap(&evalarg, eap, eap->skip);
+    if (eap->skip)
+    {
+	typval_T	rettv;
+
+	// trans_function_name() doesn't work well when skipping, use eval0()
+	// instead to skip to any following command, e.g. for:
+	//   :if 0 | call dict.foo().bar() | endif
+	++emsg_skip;
+	if (eval0(eap->arg, &rettv, eap, &evalarg) != FAIL)
+	    clear_tv(&rettv);
+	--emsg_skip;
+	clear_evalarg(&evalarg, eap);
+	return;
+    }
+
+    tofree = trans_function_name_ext(&arg, NULL, eap->skip, TFN_INT,
+			     &fudi, &partial, vim9script ? &type : NULL, NULL);
+    if (fudi.fd_newkey != NULL)
+    {
+	// Still need to give an error message for missing key.
+	semsg(_(e_key_not_present_in_dictionary_str), fudi.fd_newkey);
+	vim_free(fudi.fd_newkey);
+    }
+    if (tofree == NULL)
+	return;
+
+    // Increase refcount on dictionary, it could get deleted when evaluating
+    // the arguments.
+    if (fudi.fd_dict != NULL)
+	++fudi.fd_dict->dv_refcount;
+
+    // If it is the name of a variable of type VAR_FUNC or VAR_PARTIAL use its
+    // contents.  For VAR_PARTIAL get its partial, unless we already have one
+    // from trans_function_name().
+    len = (int)STRLEN(tofree);
+    name = deref_func_name(tofree, &len, partial != NULL ? NULL : &partial,
+				vim9script && type == NULL ? &type : NULL,
+						     FALSE, FALSE, &found_var);
+
+    // Skip white space to allow ":call func ()".  Not good, but required for
+    // backward compatibility.
+    startarg = skipwhite(arg);
+    if (*startarg != '(')
+    {
+	semsg(_(e_missing_parenthesis_str), eap->arg);
+	goto end;
+    }
+    if (vim9script && startarg > arg)
+    {
+	semsg(_(e_no_white_space_allowed_before_str_str), "(", eap->arg);
+	goto end;
+    }
+
+    if (eap->cmdidx == CMD_defer)
+    {
+	arg = startarg;
+	failed = ex_defer_inner(name, &arg, type, partial, &evalarg) == FAIL;
+    }
+    else
+    {
+	funcexe_T funcexe;
+
+	CLEAR_FIELD(funcexe);
+	funcexe.fe_check_type = type;
+	funcexe.fe_partial = partial;
+	funcexe.fe_selfdict = fudi.fd_dict;
+	funcexe.fe_firstline = eap->line1;
+	funcexe.fe_lastline = eap->line2;
+	funcexe.fe_found_var = found_var;
+	funcexe.fe_evaluate = !eap->skip;
+	failed = ex_call_inner(eap, name, &arg, startarg, &funcexe, &evalarg);
+    }
+
+    // When inside :try we need to check for following "| catch" or "| endtry".
+    // Not when there was an error, but do check if an exception was thrown.
+    if ((!aborting() || did_throw) && (!failed || eap->cstack->cs_trylevel > 0))
+    {
+	// Check for trailing illegal characters and a following command.
+	arg = skipwhite(arg);
+	if (!ends_excmd2(eap->arg, arg))
+	{
+	    if (!failed && !aborting())
+	    {
+		emsg_severe = TRUE;
+		semsg(_(e_trailing_characters_str), arg);
+	    }
+	}
+	else
+	    set_nextcmd(eap, arg);
+    }
+    // Must be after using "arg", it may point into memory cleared here.
+    clear_evalarg(&evalarg, eap);
+
+end:
+    dict_unref(fudi.fd_dict);
+    vim_free(tofree);
+}
+
+/*
+ * Return from a function.  Possibly makes the return pending.  Also called
+ * for a pending return at the ":endtry" or after returning from an extra
+ * do_cmdline().  "reanimate" is used in the latter case.  "is_cmd" is set
+ * when called due to a ":return" command.  "rettv" may point to a typval_T
+ * with the return rettv.  Returns TRUE when the return can be carried out,
+ * FALSE when the return gets pending.
+ */
+    int
+do_return(
+    exarg_T	*eap,
+    int		reanimate,
+    int		is_cmd,
+    void	*rettv)
+{
+    int		idx;
+    cstack_T	*cstack = eap->cstack;
+
+    if (reanimate)
+	// Undo the return.
+	current_funccal->fc_returned = FALSE;
+
+    /*
+     * Cleanup (and inactivate) conditionals, but stop when a try conditional
+     * not in its finally clause (which then is to be executed next) is found.
+     * In this case, make the ":return" pending for execution at the ":endtry".
+     * Otherwise, return normally.
+     */
+    idx = cleanup_conditionals(eap->cstack, 0, TRUE);
+    if (idx >= 0)
+    {
+	cstack->cs_pending[idx] = CSTP_RETURN;
+
+	if (!is_cmd && !reanimate)
+	    // A pending return again gets pending.  "rettv" points to an
+	    // allocated variable with the rettv of the original ":return"'s
+	    // argument if present or is NULL else.
+	    cstack->cs_rettv[idx] = rettv;
+	else
+	{
+	    // When undoing a return in order to make it pending, get the stored
+	    // return rettv.
+	    if (reanimate)
+		rettv = current_funccal->fc_rettv;
+
+	    if (rettv != NULL)
+	    {
+		// Store the value of the pending return.
+		if ((cstack->cs_rettv[idx] = alloc_tv()) != NULL)
+		    *(typval_T *)cstack->cs_rettv[idx] = *(typval_T *)rettv;
+		else
+		    emsg(_(e_out_of_memory));
+	    }
+	    else
+		cstack->cs_rettv[idx] = NULL;
+
+	    if (reanimate)
+	    {
+		// The pending return value could be overwritten by a ":return"
+		// without argument in a finally clause; reset the default
+		// return value.
+		current_funccal->fc_rettv->v_type = VAR_NUMBER;
+		current_funccal->fc_rettv->vval.v_number = 0;
+	    }
+	}
+	report_make_pending(CSTP_RETURN, rettv);
+    }
+    else
+    {
+	current_funccal->fc_returned = TRUE;
+
+	// If the return is carried out now, store the return value.  For
+	// a return immediately after reanimation, the value is already
+	// there.
+	if (!reanimate && rettv != NULL)
+	{
+	    clear_tv(current_funccal->fc_rettv);
+	    *current_funccal->fc_rettv = *(typval_T *)rettv;
+	    if (!is_cmd)
+		vim_free(rettv);
+	}
+    }
+
+    return idx < 0;
+}
+
+/*
+ * Free the variable with a pending return value.
+ */
+    void
+discard_pending_return(void *rettv)
+{
+    free_tv((typval_T *)rettv);
+}
+
+/*
+ * Generate a return command for producing the value of "rettv".  The result
+ * is an allocated string.  Used by report_pending() for verbose messages.
+ */
+    char_u *
+get_return_cmd(void *rettv)
+{
+    char_u	*s = NULL;
+    char_u	*tofree = NULL;
+    char_u	numbuf[NUMBUFLEN];
+
+    if (rettv != NULL)
+	s = echo_string((typval_T *)rettv, &tofree, numbuf, 0);
+    if (s == NULL)
+	s = (char_u *)"";
+
+    STRCPY(IObuff, ":return ");
+    STRNCPY(IObuff + 8, s, IOSIZE - 8);
+    if (STRLEN(s) + 8 >= IOSIZE)
+	STRCPY(IObuff + IOSIZE - 4, "...");
+    vim_free(tofree);
+    return vim_strsave(IObuff);
+}
+
+/*
+ * Get next function line.
+ * Called by do_cmdline() to get the next line.
+ * Returns allocated string, or NULL for end of function.
+ */
+    char_u *
+get_func_line(
+    int	    c UNUSED,
+    void    *cookie,
+    int	    indent UNUSED,
+    getline_opt_T options UNUSED)
+{
+    funccall_T	*fcp = (funccall_T *)cookie;
+    ufunc_T	*fp = fcp->fc_func;
+    char_u	*retval;
+    garray_T	*gap;  // growarray with function lines
+
+    // If breakpoints have been added/deleted need to check for it.
+    if (fcp->fc_dbg_tick != debug_tick)
+    {
+	fcp->fc_breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name,
+							       SOURCING_LNUM);
+	fcp->fc_dbg_tick = debug_tick;
+    }
+#ifdef FEAT_PROFILE
+    if (do_profiling == PROF_YES)
+	func_line_end(cookie);
+#endif
+
+    gap = &fp->uf_lines;
+    if (((fp->uf_flags & FC_ABORT) && did_emsg && !aborted_in_try())
+	    || fcp->fc_returned)
+	retval = NULL;
+    else
+    {
+	// Skip NULL lines (continuation lines).
+	while (fcp->fc_linenr < gap->ga_len
+			&& ((char_u **)(gap->ga_data))[fcp->fc_linenr] == NULL)
+	    ++fcp->fc_linenr;
+	if (fcp->fc_linenr >= gap->ga_len)
+	    retval = NULL;
+	else
+	{
+	    retval = vim_strsave(((char_u **)(gap->ga_data))[fcp->fc_linenr++]);
+	    SOURCING_LNUM = fcp->fc_linenr;
+#ifdef FEAT_PROFILE
+	    if (do_profiling == PROF_YES)
+		func_line_start(cookie, SOURCING_LNUM);
+#endif
+	}
+    }
+
+    // Did we encounter a breakpoint?
+    if (fcp->fc_breakpoint != 0 && fcp->fc_breakpoint <= SOURCING_LNUM)
+    {
+	dbg_breakpoint(fp->uf_name, SOURCING_LNUM);
+	// Find next breakpoint.
+	fcp->fc_breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name,
+							       SOURCING_LNUM);
+	fcp->fc_dbg_tick = debug_tick;
+    }
+
+    return retval;
+}
+
+/*
+ * Return TRUE if the currently active function should be ended, because a
+ * return was encountered or an error occurred.  Used inside a ":while".
+ */
+    int
+func_has_ended(void *cookie)
+{
+    funccall_T  *fcp = (funccall_T *)cookie;
+
+    // Ignore the "abort" flag if the abortion behavior has been changed due to
+    // an error inside a try conditional.
+    return (((fcp->fc_func->uf_flags & FC_ABORT)
+					      && did_emsg && !aborted_in_try())
+	    || fcp->fc_returned);
+}
+
+/*
+ * return TRUE if cookie indicates a function which "abort"s on errors.
+ */
+    int
+func_has_abort(
+    void    *cookie)
+{
+    return ((funccall_T *)cookie)->fc_func->uf_flags & FC_ABORT;
+}
+
+
+/*
+ * Turn "dict.Func" into a partial for "Func" bound to "dict".
+ * Don't do this when "Func" is already a partial that was bound
+ * explicitly (pt_auto is FALSE).
+ * Changes "rettv" in-place.
+ * Returns the updated "selfdict_in".
+ */
+    dict_T *
+make_partial(dict_T *selfdict_in, typval_T *rettv)
+{
+    char_u	*fname;
+    ufunc_T	*fp = NULL;
+    char_u	fname_buf[FLEN_FIXED + 1];
+    dict_T	*selfdict = selfdict_in;
+
+    if (rettv->v_type == VAR_PARTIAL  && rettv->vval.v_partial != NULL
+				     && rettv->vval.v_partial->pt_func != NULL)
+	fp = rettv->vval.v_partial->pt_func;
+    else
+    {
+	fname = rettv->v_type == VAR_FUNC ? rettv->vval.v_string
+					 : rettv->vval.v_partial == NULL ? NULL
+					      : rettv->vval.v_partial->pt_name;
+	if (fname == NULL)
+	{
+	    // There is no point binding a dict to a NULL function, just create
+	    // a function reference.
+	    rettv->v_type = VAR_FUNC;
+	    rettv->vval.v_string = NULL;
+	}
+	else
+	{
+	    char_u	*tofree = NULL;
+	    funcerror_T	error;
+
+	    // Translate "s:func" to the stored function name.
+	    fname = fname_trans_sid(fname, fname_buf, &tofree, &error);
+	    fp = find_func(fname, FALSE);
+	    vim_free(tofree);
+	}
+    }
+
+    if (fp != NULL && (fp->uf_flags & FC_DICT))
+    {
+	partial_T	*pt = ALLOC_CLEAR_ONE(partial_T);
+
+	if (pt != NULL)
+	{
+	    pt->pt_refcount = 1;
+	    pt->pt_dict = selfdict;
+	    pt->pt_auto = TRUE;
+	    selfdict = NULL;
+	    if (rettv->v_type == VAR_FUNC)
+	    {
+		// Just a function: Take over the function name and use
+		// selfdict.
+		pt->pt_name = rettv->vval.v_string;
+	    }
+	    else
+	    {
+		partial_T	*ret_pt = rettv->vval.v_partial;
+		int		i;
+
+		// Partial: copy the function name, use selfdict and copy
+		// args.  Can't take over name or args, the partial might
+		// be referenced elsewhere.
+		if (ret_pt->pt_name != NULL)
+		{
+		    pt->pt_name = vim_strsave(ret_pt->pt_name);
+		    func_ref(pt->pt_name);
+		}
+		else
+		{
+		    pt->pt_func = ret_pt->pt_func;
+		    func_ptr_ref(pt->pt_func);
+		}
+		if (ret_pt->pt_argc > 0)
+		{
+		    pt->pt_argv = ALLOC_MULT(typval_T, ret_pt->pt_argc);
+		    if (pt->pt_argv == NULL)
+			// out of memory: drop the arguments
+			pt->pt_argc = 0;
+		    else
+		    {
+			pt->pt_argc = ret_pt->pt_argc;
+			for (i = 0; i < pt->pt_argc; i++)
+			    copy_tv(&ret_pt->pt_argv[i], &pt->pt_argv[i]);
+		    }
+		}
+		partial_unref(ret_pt);
+	    }
+	    rettv->v_type = VAR_PARTIAL;
+	    rettv->vval.v_partial = pt;
+	}
+    }
+    return selfdict;
+}
+
+/*
+ * Return the name of the executed function.
+ */
+    char_u *
+func_name(void *cookie)
+{
+    return ((funccall_T *)cookie)->fc_func->uf_name;
+}
+
+/*
+ * Return the address holding the next breakpoint line for a funccall cookie.
+ */
+    linenr_T *
+func_breakpoint(void *cookie)
+{
+    return &((funccall_T *)cookie)->fc_breakpoint;
+}
+
+/*
+ * Return the address holding the debug tick for a funccall cookie.
+ */
+    int *
+func_dbg_tick(void *cookie)
+{
+    return &((funccall_T *)cookie)->fc_dbg_tick;
+}
+
+/*
+ * Return the nesting level for a funccall cookie.
+ */
+    int
+func_level(void *cookie)
+{
+    return ((funccall_T *)cookie)->fc_level;
+}
+
+/*
+ * Return TRUE when a function was ended by a ":return" command.
+ */
+    int
+current_func_returned(void)
+{
+    return current_funccal->fc_returned;
+}
+
+    int
+free_unref_funccal(int copyID, int testing)
+{
+    int		did_free = FALSE;
+    int		did_free_funccal = FALSE;
+    funccall_T	*fc, **pfc;
+
+    for (pfc = &previous_funccal; *pfc != NULL; )
+    {
+	if (can_free_funccal(*pfc, copyID))
+	{
+	    fc = *pfc;
+	    *pfc = fc->fc_caller;
+	    free_funccal_contents(fc);
+	    did_free = TRUE;
+	    did_free_funccal = TRUE;
+	}
+	else
+	    pfc = &(*pfc)->fc_caller;
+    }
+    if (did_free_funccal)
+	// When a funccal was freed some more items might be garbage
+	// collected, so run again.
+	(void)garbage_collect(testing);
+
+    return did_free;
+}
+
+/*
+ * Get function call environment based on backtrace debug level
+ */
+    static funccall_T *
+get_funccal(void)
+{
+    int		i;
+    funccall_T	*funccal;
+    funccall_T	*temp_funccal;
+
+    funccal = current_funccal;
+    if (debug_backtrace_level > 0)
+    {
+	for (i = 0; i < debug_backtrace_level; i++)
+	{
+	    temp_funccal = funccal->fc_caller;
+	    if (temp_funccal)
+		funccal = temp_funccal;
+	    else
+		// backtrace level overflow. reset to max
+		debug_backtrace_level = i;
+	}
+    }
+    return funccal;
+}
+
+/*
+ * Return the hashtable used for local variables in the current funccal.
+ * Return NULL if there is no current funccal.
+ */
+    hashtab_T *
+get_funccal_local_ht(void)
+{
+    if (current_funccal == NULL || current_funccal->fc_l_vars.dv_refcount == 0)
+	return NULL;
+    return &get_funccal()->fc_l_vars.dv_hashtab;
+}
+
+/*
+ * Return the l: scope variable.
+ * Return NULL if there is no current funccal.
+ */
+    dictitem_T *
+get_funccal_local_var(void)
+{
+    if (current_funccal == NULL || current_funccal->fc_l_vars.dv_refcount == 0)
+	return NULL;
+    return &get_funccal()->fc_l_vars_var;
+}
+
+/*
+ * Return the hashtable used for argument in the current funccal.
+ * Return NULL if there is no current funccal.
+ */
+    hashtab_T *
+get_funccal_args_ht(void)
+{
+    if (current_funccal == NULL || current_funccal->fc_l_vars.dv_refcount == 0)
+	return NULL;
+    return &get_funccal()->fc_l_avars.dv_hashtab;
+}
+
+/*
+ * Return the a: scope variable.
+ * Return NULL if there is no current funccal.
+ */
+    dictitem_T *
+get_funccal_args_var(void)
+{
+    if (current_funccal == NULL || current_funccal->fc_l_vars.dv_refcount == 0)
+	return NULL;
+    return &get_funccal()->fc_l_avars_var;
+}
+
+/*
+ * List function variables, if there is a function.
+ */
+    void
+list_func_vars(int *first)
+{
+    if (current_funccal != NULL && current_funccal->fc_l_vars.dv_refcount > 0)
+	list_hashtable_vars(&current_funccal->fc_l_vars.dv_hashtab,
+							   "l:", FALSE, first);
+}
+
+/*
+ * If "ht" is the hashtable for local variables in the current funccal, return
+ * the dict that contains it.
+ * Otherwise return NULL.
+ */
+    dict_T *
+get_current_funccal_dict(hashtab_T *ht)
+{
+    if (current_funccal != NULL
+	    && ht == &current_funccal->fc_l_vars.dv_hashtab)
+	return &current_funccal->fc_l_vars;
+    return NULL;
+}
+
+/*
+ * Search hashitem in parent scope.
+ */
+    hashitem_T *
+find_hi_in_scoped_ht(char_u *name, hashtab_T **pht)
+{
+    funccall_T	*old_current_funccal = current_funccal;
+    hashtab_T	*ht;
+    hashitem_T	*hi = NULL;
+    char_u	*varname;
+
+    if (current_funccal == NULL || current_funccal->fc_func->uf_scoped == NULL)
+      return NULL;
+
+    // Search in parent scope, which can be referenced from a lambda.
+    current_funccal = current_funccal->fc_func->uf_scoped;
+    while (current_funccal != NULL)
+    {
+	ht = find_var_ht(name, &varname);
+	if (ht != NULL && *varname != NUL)
+	{
+	    hi = hash_find(ht, varname);
+	    if (!HASHITEM_EMPTY(hi))
+	    {
+		*pht = ht;
+		break;
+	    }
+	}
+	if (current_funccal == current_funccal->fc_func->uf_scoped)
+	    break;
+	current_funccal = current_funccal->fc_func->uf_scoped;
+    }
+    current_funccal = old_current_funccal;
+
+    return hi;
+}
+
+/*
+ * Search variable in parent scope.
+ */
+    dictitem_T *
+find_var_in_scoped_ht(char_u *name, int no_autoload)
+{
+    dictitem_T	*v = NULL;
+    funccall_T	*old_current_funccal = current_funccal;
+    hashtab_T	*ht;
+    char_u	*varname;
+
+    if (current_funccal == NULL || current_funccal->fc_func->uf_scoped == NULL)
+	return NULL;
+
+    // Search in parent scope which is possible to reference from lambda
+    current_funccal = current_funccal->fc_func->uf_scoped;
+    while (current_funccal)
+    {
+	ht = find_var_ht(name, &varname);
+	if (ht != NULL && *varname != NUL)
+	{
+	    v = find_var_in_ht(ht, *name, varname, no_autoload);
+	    if (v != NULL)
+		break;
+	}
+	if (current_funccal == current_funccal->fc_func->uf_scoped)
+	    break;
+	current_funccal = current_funccal->fc_func->uf_scoped;
+    }
+    current_funccal = old_current_funccal;
+
+    return v;
+}
+
+/*
+ * Set "copyID + 1" in previous_funccal and callers.
+ */
+    int
+set_ref_in_previous_funccal(int copyID)
+{
+    funccall_T	*fc;
+
+    for (fc = previous_funccal; fc != NULL; fc = fc->fc_caller)
+    {
+	fc->fc_copyID = copyID + 1;
+	if (set_ref_in_ht(&fc->fc_l_vars.dv_hashtab, copyID + 1, NULL)
+		|| set_ref_in_ht(&fc->fc_l_avars.dv_hashtab, copyID + 1, NULL)
+		|| set_ref_in_list_items(&fc->fc_l_varlist, copyID + 1, NULL))
+	    return TRUE;
+    }
+    return FALSE;
+}
+
+    static int
+set_ref_in_funccal(funccall_T *fc, int copyID)
+{
+    if (fc->fc_copyID != copyID)
+    {
+	fc->fc_copyID = copyID;
+	if (set_ref_in_ht(&fc->fc_l_vars.dv_hashtab, copyID, NULL)
+		|| set_ref_in_ht(&fc->fc_l_avars.dv_hashtab, copyID, NULL)
+		|| set_ref_in_list_items(&fc->fc_l_varlist, copyID, NULL)
+		|| set_ref_in_func(NULL, fc->fc_func, copyID))
+	    return TRUE;
+    }
+    return FALSE;
+}
+
+/*
+ * Set "copyID" in all local vars and arguments in the call stack.
+ */
+    int
+set_ref_in_call_stack(int copyID)
+{
+    funccall_T		*fc;
+    funccal_entry_T	*entry;
+
+    for (fc = current_funccal; fc != NULL; fc = fc->fc_caller)
+	if (set_ref_in_funccal(fc, copyID))
+	    return TRUE;
+
+    // Also go through the funccal_stack.
+    for (entry = funccal_stack; entry != NULL; entry = entry->next)
+	for (fc = entry->top_funccal; fc != NULL; fc = fc->fc_caller)
+	    if (set_ref_in_funccal(fc, copyID))
+		return TRUE;
+    return FALSE;
+}
+
+/*
+ * Set "copyID" in all functions available by name.
+ */
+    int
+set_ref_in_functions(int copyID)
+{
+    int		todo;
+    hashitem_T	*hi = NULL;
+    ufunc_T	*fp;
+
+    todo = (int)func_hashtab.ht_used;
+    for (hi = func_hashtab.ht_array; todo > 0 && !got_int; ++hi)
+    {
+	if (!HASHITEM_EMPTY(hi))
+	{
+	    --todo;
+	    fp = HI2UF(hi);
+	    if (!func_name_refcount(fp->uf_name)
+					  && set_ref_in_func(NULL, fp, copyID))
+		return TRUE;
+	}
+    }
+    return FALSE;
+}
+
+/*
+ * Set "copyID" in all function arguments.
+ */
+    int
+set_ref_in_func_args(int copyID)
+{
+    int i;
+
+    for (i = 0; i < funcargs.ga_len; ++i)
+	if (set_ref_in_item(((typval_T **)funcargs.ga_data)[i],
+							  copyID, NULL, NULL))
+	    return TRUE;
+    return FALSE;
+}
+
+/*
+ * Mark all lists and dicts referenced through function "name" with "copyID".
+ * Returns TRUE if setting references failed somehow.
+ */
+    int
+set_ref_in_func(char_u *name, ufunc_T *fp_in, int copyID)
+{
+    ufunc_T	*fp = fp_in;
+    funccall_T	*fc;
+    funcerror_T	error = FCERR_NONE;
+    char_u	fname_buf[FLEN_FIXED + 1];
+    char_u	*tofree = NULL;
+    char_u	*fname;
+    int		abort = FALSE;
+
+    if (name == NULL && fp_in == NULL)
+	return FALSE;
+
+    if (fp_in == NULL)
+    {
+	fname = fname_trans_sid(name, fname_buf, &tofree, &error);
+	fp = find_func(fname, FALSE);
+    }
+    if (fp != NULL)
+    {
+	for (fc = fp->uf_scoped; fc != NULL; fc = fc->fc_func->uf_scoped)
+	    abort = abort || set_ref_in_funccal(fc, copyID);
+    }
+
+    vim_free(tofree);
+    return abort;
+}
+
+#endif // FEAT_EVAL