Issue #16602: When a weakref's target was part of a long deallocation chain, the object could remain reachable through its weakref even though its refcount had dropped to zero.
Thanks to Eugene Toder for diagnosing and reporting the issue.
diff --git a/Misc/ACKS b/Misc/ACKS
index 0a7c8bd..5e4c03a 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -990,6 +990,7 @@
Frank J. Tobin
R Lindsay Todd
Bennett Todd
+Eugene Toder
Matias Torchinsky
Sandro Tosi
Richard Townsend
diff --git a/Misc/NEWS b/Misc/NEWS
index 0c01e8b..9934212 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -9,6 +9,10 @@
Core and Builtins
-----------------
+- Issue #16602: When a weakref's target was part of a long deallocation
+ chain, the object could remain reachable through its weakref even though
+ its refcount had dropped to zero.
+
- Issue #9011: Fix hacky AST code that modified the CST when compiling
a negated numeric literal.