python · ambv · Jul 31, 2017 · Jul 31, 2017
diff --git a/Lib/weakref.py b/Lib/weakref.py
@@ -53,15 +53,15 @@ def __init__(*args, **kw):
        args = args[1:]
        if len(args) > 1:
            raise TypeError('expected at most 1 arguments, got %d' % len(args))
-        def remove(wr, selfref=ref(self)):
+        def remove(wr, selfref=ref(self), _atomic_removal=_remove_dead_weakref):
            self = selfref()
            if self is not None:
                if self._iterating:
                    self._pending_removals.append(wr.key)
                else:
                    # Atomic removal is necessary since this function
                    # can be called asynchronously by the GC
-                    _remove_dead_weakref(self.data, wr.key)
+                    _atomic_removal(self.data, wr.key)
        self._remove = remove
        # A list of keys to be removed
        self._pending_removals = []

diff --git a/Misc/NEWS.d/next/Library/2017-07-31-19-32-57.bpo-29519._j1awg.rst b/Misc/NEWS.d/next/Library/2017-07-31-19-32-57.bpo-29519._j1awg.rst
@@ -0,0 +1,2 @@
+Fix weakref spewing exceptions during interpreter shutdown when used with a
+rare combination of multiprocessing and custom codecs.
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,2 @@
		Fix weakref spewing exceptions during interpreter shutdown when used with a
		rare combination of multiprocessing and custom codecs.