Issue #13992: The trashcan mechanism is now thread-safe. This eliminates
sporadic crashes in multi-thread programs when several long deallocator
chains ran concurrently and involved subclasses of built-in container
types.
Because of this change, a couple extension modules compiled for 2.7.4
(those which use the trashcan mechanism, despite it being undocumented)
will not be loadable by 2.7.3 and earlier. However, extension modules
compiled for 2.7.3 and earlier will be loadable by 2.7.4.
diff --git a/Misc/NEWS b/Misc/NEWS
index 68e0d6b..b080c1e 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -9,6 +9,11 @@
Core and Builtins
-----------------
+- Issue #13992: The trashcan mechanism is now thread-safe. This eliminates
+ sporadic crashes in multi-thread programs when several long deallocator
+ chains ran concurrently and involved subclasses of built-in container
+ types.
+
- Issue #15801: Make sure mappings passed to '%' formatting are actually
subscriptable.