rb_singleton_class_clone 113 class.c        	    RBASIC(clone)->klass = rb_singleton_class_clone(klass);
rb_singleton_class_clone 131 object.c           RBASIC(clone)->klass = rb_singleton_class_clone(obj);
rb_singleton_class_clone 281 ruby.h             OBJSETUP(clone,rb_singleton_class_clone((VALUE)obj),RBASIC(obj)->flags);\