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patch 8.2.3083: crash when passing null string to charclass()

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Problem:    Crash when passing null string to charclass().
Solution:   Bail out when string pointer is NULL. (Christian Brabandt,
            closes #8498, closes #8260)
This commit is contained in:
Christian Brabandt 2021-07-02 20:19:31 +02:00 committed by Bram Moolenaar
parent b836f631db
commit 72463f883c
3 changed files with 6 additions and 1 deletions
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3
src/mbyte.c
View File

@ -5587,7 +5587,8 @@ f_setcellwidths(typval_T *argvars, typval_T *rettv UNUSED)
void
f_charclass(typval_T *argvars, typval_T *rettv UNUSED)
{
if (check_for_string_arg(argvars, 0) == FAIL)
if (check_for_string_arg(argvars, 0) == FAIL
|| argvars[0].vval.v_string == NULL)
return;
rettv->vval.v_number = mb_get_class(argvars[0].vval.v_string);
}

2
src/testdir/test_functions.vim
View File

@ -2169,6 +2169,8 @@ func Test_charclass()
call assert_equal(1, charclass('.'))
call assert_equal(2, charclass('x'))
call assert_equal(3, charclass("\u203c"))
" this used to crash vim
call assert_equal(0, "xxx"[-1]->charclass())
endfunc
func Test_eventhandler()

2
src/version.c
View File

@ -755,6 +755,8 @@ static char *(features[]) =
static int included_patches[] =
{ /* Add new patch number below this line */
/**/
3083,
/**/
3082,
/**/