rb_singleton_class_attached 124 class.c        	rb_singleton_class_attached(RBASIC(clone)->klass, (VALUE)clone);
rb_singleton_class_attached 149 class.c            rb_singleton_class_attached(klass, obj);
rb_singleton_class_attached 282 ruby.h             rb_singleton_class_attached(RBASIC(clone)->klass, (VALUE)clone);\