patch 8.2.3083: crash when passing null string to charclass()
Problem: Crash when passing null string to charclass().
Solution: Bail out when string pointer is NULL. (Christian Brabandt,
closes #8498, closes #8260)
diff --git a/src/mbyte.c b/src/mbyte.c
index 8ac15d3..b2519ec 100644
--- a/src/mbyte.c
+++ b/src/mbyte.c
@@ -5587,7 +5587,8 @@
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);
}