From 4ffe5d018919d3fbea21e667f09f14b9751f9cd5 Mon Sep 17 00:00:00 2001
From: zeertzjq <zeertzjq@outlook.com>
Date: Thu, 7 Jul 2022 06:37:54 +0800
Subject: vim-patch:8.2.5063: error for a command may go over the end of IObuff
 (#19260)

Problem:    Error for a command may go over the end of IObuff.
Solution:   Truncate the message.
https://github.com/vim/vim/commit/44a3f3353e0407e9fffee138125a6927d1c9e7e5
---
 src/nvim/ex_docmd.c | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'src/nvim/ex_docmd.c')

diff --git a/src/nvim/ex_docmd.c b/src/nvim/ex_docmd.c
index 18490bd60c..d4fe55392e 100644
--- a/src/nvim/ex_docmd.c
+++ b/src/nvim/ex_docmd.c
@@ -2904,9 +2904,16 @@ int checkforcmd(char **pp, char *cmd, int len)
 /// invisible otherwise.
 static void append_command(char *cmd)
 {
+  size_t len = STRLEN(IObuff);
   char *s = cmd;
   char *d;
 
+  if (len > IOSIZE - 100) {
+    // Not enough space, truncate and put in "...".
+    d = (char *)IObuff + IOSIZE - 100;
+    d -= utf_head_off(IObuff, (const char_u *)d);
+    STRCPY(d, "...");
+  }
   STRCAT(IObuff, ": ");
   d = (char *)IObuff + STRLEN(IObuff);
   while (*s != NUL && (char_u *)d - IObuff + 5 < IOSIZE) {
-- 
cgit