From 44a3f3353e0407e9fffee138125a6927d1c9e7e5 Mon Sep 17 00:00:00 2001 From: Bram Moolenaar Date: Mon, 6 Jun 2022 15:38:21 +0100 Subject: [PATCH] patch 8.2.5063: error for a command may go over the end of IObuff Problem: Error for a command may go over the end of IObuff. Solution: Truncate the message. --- src/ex_docmd.c | 12 ++++++++++-- src/testdir/test_cmdline.vim | 5 +++++ src/version.c | 2 ++ 3 files changed, 17 insertions(+), 2 deletions(-) --- a/src/ex_docmd.c +++ b/src/ex_docmd.c @@ -3111,9 +3111,17 @@ checkforcmd( static void append_command(char_u *cmd) { - char_u *s = cmd; - char_u *d; + size_t len = STRLEN(IObuff); + char_u *s = cmd; + char_u *d; + if (len > IOSIZE - 100) + { + // Not enough space, truncate and put in "...". + d = IObuff + IOSIZE - 100; + d -= mb_head_off(IObuff, d); + STRCPY(d, "..."); + } STRCAT(IObuff, ": "); d = IObuff + STRLEN(IObuff); while (*s != NUL && d - IObuff + 5 < IOSIZE) --- a/src/testdir/test_cmdline.vim +++ b/src/testdir/test_cmdline.vim @@ -657,3 +657,9 @@ endfunc set cpo& + +func Test_long_error_message() + " the error should be truncated, not overrun IObuff + silent! norm Q00000000000000     000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000                                                                                                                                                                                                                         +endfunc + --- a/src/version.c +++ b/src/version.c @@ -792,6 +792,8 @@ static char *(features[]) = static int included_patches[] = { /* Add new patch number below this line */ /**/ + 5063, +/**/ 5043, /**/ 805,