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

1 files changed, 0 insertions, 2 deletions

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);