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.
diff --git a/src/ex_docmd.c b/src/ex_docmd.c
index cfb40e8..634a1bc 100644
--- a/src/ex_docmd.c
+++ b/src/ex_docmd.c
@@ -3441,9 +3441,17 @@
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)