Raise special Exception when exception class is redefined; fix
MODIFY
src/class.c
src/class.c
@@ -330,8 +330,14 @@ mrb_class_get(mrb_state *mrb, const char *name)
MRB_API struct RClass *
mrb_exc_get(mrb_state *mrb, const char *name)
{
- struct RClass *exc = mrb_class_get_under(mrb, mrb->object_class, name);
- struct RClass *e = exc;
+ struct RClass *exc, *e;
+ mrb_value c = mrb_const_get(mrb, mrb_obj_value(mrb->object_class),
+ mrb_intern_cstr(mrb, name));
+
+ if (mrb_type(c) != MRB_TT_CLASS) {
+ mrb_raise(mrb, mrb->eException_class, "exception corrupted");
+ }
+ exc = e = mrb_class_ptr(c);
while (e) {
if (e == mrb->eException_class)

Raise special Exception when exception class is redefined; fix #3493