Don't copy RUBY_FL_PROMOTED flag in rb_obj_setup #9349
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RUBY_FL_PROMOTED is used by the garbage collector to track when an object becomes promoted to the old generation. rb_obj_setup must not copy that flag over because then it may become out-of-sync with the age of the object. This fixes a bug in Method#clone where the cloned Method object may get RUBY_FL_PROMOTED incorrectly set.
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RUBY_FL_PROMOTED is used by the garbage collector to track when an object becomes promoted to the old generation. rb_obj_setup must not copy that flag over because then it may become out-of-sync with the age of the object.
This fixes a bug in Method#clone where the cloned Method object may get RUBY_FL_PROMOTED incorrectly set.