* to invalidate caches (e.g. by PyType_Modified), that clearing has created
* a bug. If the weakref to the subclass is cleared before a finalizer is
* called, the cache may not be correctly invalidated. That can lead to
- * segfaults since the caches can refer to deallocated objects (GH-91636
+ * segfaults since the caches can refer to deallocated objects (GH-135552
* is an example). Now, we delay the clear of weakrefs without callbacks
* until *after* finalizers have been executed. That means weakrefs without
* callbacks are still usable while finalizers are being executed.