Use the old style declaration; ref
MODIFY
src/variable.c
src/variable.c
@@ -1116,7 +1116,9 @@ mrb_class_find_path(mrb_state *mrb, struct RClass *c)
mrb_bool
mrb_ident_p(const char *s, mrb_int len)
{
- for (mrb_int i = 0; i < len; i++) {
+ mrb_int i;
+
+ for (i = 0; i < len; i++) {
if (!identchar(s[i])) return FALSE;
}
return TRUE;

Use the old style declaration; ref #4365