From 38e05ff3e194268fd2f38ac7c9530298e464f07b Mon Sep 17 00:00:00 2001
From: ko1 <ko1@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 9 Jul 2018 08:07:26 +0000
Subject: Don't copy FL_USER* on Kernel#clone. [Bug #14847]

* object.c (mutable_obj_clone): `Kernel#clone` should not copy
  FL_USER* flags because they are copied unexpectedly.
  Unexpected copy will break internal data consistency.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63912 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 object.c | 2 --
 1 file changed, 2 deletions(-)

(limited to 'object.c')

diff --git a/object.c b/object.c
index 036e07b64f..9492abfac9 100644
--- a/object.c
+++ b/object.c
@@ -448,8 +448,6 @@ mutable_obj_clone(VALUE obj, int kwfreeze)
     VALUE clone, singleton;
 
     clone = rb_obj_alloc(rb_obj_class(obj));
-    RBASIC(clone)->flags &= (FL_TAINT|FL_PROMOTED0|FL_PROMOTED1);
-    RBASIC(clone)->flags |= RBASIC(obj)->flags & ~(FL_PROMOTED0|FL_PROMOTED1|FL_FREEZE|FL_FINALIZE);
 
     singleton = rb_singleton_class_clone_and_attach(obj, clone);
     RBASIC_SET_CLASS(clone, singleton);
-- 
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