patch 8.2.3162: Vim9: argument types are not checked at compile time
Problem: Vim9: argument types are not checked at compile time.
Solution: Add more type checks. (Yegappan Lakshmanan, closes #8560)
diff --git a/src/cmdhist.c b/src/cmdhist.c
index 8bb3cb6..1b04e62 100644
--- a/src/cmdhist.c
+++ b/src/cmdhist.c
@@ -597,6 +597,12 @@
int idx;
char_u *str;
+ if (in_vim9script()
+ && (check_for_string_arg(argvars, 0) == FAIL
+ || (argvars[1].v_type != VAR_UNKNOWN
+ && check_for_number_arg(argvars, 1) == FAIL)))
+ return;
+
str = tv_get_string_chk(&argvars[0]); // NULL on type error
if (str == NULL)
rettv->vval.v_string = NULL;