From 083691dbd19364aceba9cc03f9cbb4eec432422c Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Fri, 22 Apr 2022 15:26:24 +0900
Subject: [PATCH] variable.c (const_get): stop searching constant before
 `Object`.

`String::String` should raise `NameError` exception.
---
 src/variable.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/variable.c b/src/variable.c
index 4f1c8bace..365d93034 100644
--- a/src/variable.c
+++ b/src/variable.c
@@ -774,6 +774,7 @@ const_get(mrb_state *mrb, struct RClass *base, mrb_sym sym, mrb_bool skip)
   mrb_bool retry = FALSE;
   mrb_value name;
 
+  /* if skip then skip the current class (already searched) */
   if (skip) c = c->super;
 L_RETRY:
   while (c) {
@@ -782,6 +783,7 @@ L_RETRY:
         return v;
     }
     c = c->super;
+    if (!skip && c == mrb->object_class) break;
   }
   if (!retry && base->tt == MRB_TT_MODULE) {
     c = mrb->object_class;