KlassCleaningTask::work() only calls InstanceKlass::clean_weak_instanceklass_links() on the klasses in the hierarchy, missing old, previously redefined klasses like Klass::clean_weak_klass_links() would do if called with clean_live_klasses = true.

JDK-8156137 missed that location when trying to fix this; however this has been found by code inspection, there is no known crash for this.