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patch 8.2.3006: crash when echoing a value very early

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Problem:    Crash when echoing a value very early. (Naruhiko Nishino)
Solution:   Do not use a NUL to truncate the message, make a copy.
            (closes #8388)
This commit is contained in:
Bram Moolenaar
2021-06-15 22:39:11 +02:00
parent f57b43c230
commit a97c36310f
3 changed files with 27 additions and 9 deletions
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20
src/message.c
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@@ -2751,19 +2751,21 @@ msg_puts_printf(char_u *str, int maxlen)
if (*p != NUL && !(silent_mode && p_verbose == 0))
{
int c = -1;
char_u *tofree = NULL;
if (maxlen > 0 && STRLEN(p) > (size_t)maxlen)
{
c = p[maxlen];
p[maxlen] = 0;
tofree = vim_strnsave(p, (size_t)maxlen);
p = tofree;
}
if (p != NULL)
{
if (info_message)
mch_msg((char *)p);
else
mch_errmsg((char *)p);
vim_free(tofree);
}
if (info_message)
mch_msg((char *)p);
else
mch_errmsg((char *)p);
if (c != -1)
p[maxlen] = c;
}
msg_didout = TRUE; // assume that line is not empty