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Singleton class of frozen object should be frozen

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Before this patch:

  p (class << Object.new.freeze; self end).frozen?                #=> false
  sc = class << (o=Object.new); self end; o.freeze; p sc.frozen?  #=> false

After this patch / Ruby:

  p (class << Object.new.freeze; self end).frozen?                #=> true
  sc = class << (o=Object.new); self end; o.freeze; p sc.frozen?  #=> true
This commit is contained in:
KOBAYASHI Shuji
2019-04-25 19:48:40 +09:00
parent e5799b5d40
commit 8fa3995a1a
4 changed files with 25 additions and 0 deletions
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src/class.c
+1
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@@ -120,6 +120,7 @@ prepare_singleton_class(mrb_state *mrb, struct RBasic *o)
mrb_field_write_barrier(mrb, (struct RBasic*)o, (struct RBasic*)sc);
mrb_field_write_barrier(mrb, (struct RBasic*)sc, (struct RBasic*)o);
mrb_obj_iv_set(mrb, (struct RObject*)sc, mrb_intern_lit(mrb, "__attached__"), mrb_obj_value(o));
sc->flags |= o->flags & MRB_FL_OBJ_IS_FROZEN;
}
static mrb_value