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Don't copy FL_USER* on Kernel#clone. [Bug #14847]

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* 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
This commit is contained in:
ko1 2018-07-09 08:07:26 +00:00
parent 63efc86bf7
commit 38e05ff3e1
2 changed files with 35 additions and 2 deletions
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2
object.c
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@ -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);