From: Markus Koschany <apo@debian.org>
Date: Sun, 30 Oct 2022 20:51:31 +0100
Subject: CVE-2022-0685

Origin: https://github.com/vim/vim/commit/5921aeb5741fc6e84c870d68c7c35b93ad0c9f87
---
 src/charset.c                  | 6 ++++++
 src/proto/charset.pro          | 2 +-
 src/testdir/test_autochdir.vim | 9 +++++++++
 src/version.c                  | 2 ++
 4 files changed, 18 insertions(+), 1 deletion(-)

--- a/src/charset.c
+++ b/src/charset.c
@@ -1673,6 +1673,12 @@ vim_isupper(int c)
 }
 
     int
+vim_isalpha(int c)
+{
+    return vim_islower(c) || vim_isupper(c);
+}
+
+    int
 vim_toupper(int c)
 {
     if (c <= '@')
--- a/src/proto/charset.pro
+++ b/src/proto/charset.pro
@@ -48,6 +48,7 @@ int vim_isxdigit(int c);
 int vim_isbdigit(int c);
 int vim_islower(int c);
 int vim_isupper(int c);
+int vim_isalpha(int c);
 int vim_toupper(int c);
 int vim_tolower(int c);
 char_u *skiptowhite(char_u *p);
@@ -60,5 +61,4 @@ int hexhex2nr(char_u *p);
 int rem_backslash(char_u *str);
 void backslash_halve(char_u *p);
 char_u *backslash_halve_save(char_u *p);
-void ebcdic2ascii(char_u *buffer, int len);
 /* vim: set ft=c : */