Bug #1196315: fix weakref.WeakValueDictionary constructor.

Lib/weakref.py

@@ -43,12 +43,12 @@ class WeakValueDictionary(UserDict.UserDict):
     # way in).
 
     def __init__(self, *args, **kw):
-        UserDict.UserDict.__init__(self, *args, **kw)
         def remove(wr, selfref=ref(self)):
             self = selfref()
             if self is not None:
                 del self.data[wr.key]
         self._remove = remove
+        UserDict.UserDict.__init__(self, *args, **kw)
 
     def __getitem__(self, key):
         o = self.data[key]()

Misc/NEWS

@@ -141,6 +141,8 @@ Extension Modules
 Library
 -------
 
+- Bug #1196315: fix weakref.WeakValueDictionary constructor.
+
 - Bug #1213894: os.path.realpath didn't resolve symlinks that were the first
   component of the path.