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patch 8.2.0101: crash when passing null object to ":echomsg"

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Problem:    Crash when passing null object to ":echomsg".
Solution:   Check for NULL pointer. (Yasuhiro Matsumoto, closes #5460)
This commit is contained in:
Bram Moolenaar
2020-01-08 18:56:20 +01:00
parent 41a4141ecb
commit 9db2afe46d
3 changed files with 19 additions and 0 deletions
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7
src/eval.c
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@@ -5682,6 +5682,7 @@ tv_stringify(typval_T *varp, char_u *buf)
{
if (varp->v_type == VAR_LIST
|| varp->v_type == VAR_DICT
|| varp->v_type == VAR_BLOB
|| varp->v_type == VAR_FUNC
|| varp->v_type == VAR_PARTIAL
|| varp->v_type == VAR_FLOAT)
@@ -6057,6 +6058,12 @@ ex_execute(exarg_T *eap)
p = tv_get_string_buf(&rettv, buf);
else
p = tv_stringify(&rettv, buf);
if (p == NULL)
{
clear_tv(&rettv);
ret = FAIL;
break;
}
len = (int)STRLEN(p);
if (ga_grow(&ga, len + 2) == FAIL)
{