Issue #9825: Remove __del__() from OrderedDict.
diff --git a/Lib/collections.py b/Lib/collections.py
index 10c8903..b0c67a1 100644
--- a/Lib/collections.py
+++ b/Lib/collections.py
@@ -173,9 +173,6 @@
all(_imap(_eq, self.iteritems(), other.iteritems()))
return dict.__eq__(self, other)
- def __del__(self):
- self.clear() # eliminate cyclical references
-
################################################################################
### namedtuple
diff --git a/Misc/NEWS b/Misc/NEWS
index b65e860..a31d95a 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -43,6 +43,13 @@
Library
-------
+- Issue #9825: removed __del__ from the definition of collections.OrderedDict.
+ This prevents user-created self-referencing ordered dictionaries from
+ becoming permanently uncollectable GC garbage. The downside is that
+ removing __del__ means that the internal doubly-linked list has to wait for
+ GC collection rather than freeing memory immediately when the refcnt drops
+ to zero.
+
- Issue #9816: random.Random.jumpahead(n) did not produce a sufficiently
different internal state for small values of n. Fixed by salting the
value.