Index: Lib/logging/__init__.py
===================================================================
--- Lib/logging/__init__.py	(revision 80667)
+++ Lib/logging/__init__.py	(working copy)
@@ -701,9 +701,11 @@
         """
         #get the module data lock, as we're updating a shared structure.
         _acquireLock()
-        try:    #unlikely to raise an exception, but you never know...
-            del _handlers[self]
-            _handlerList.remove(self)
+        try:
+            if self in _handlers:
+                del _handlers[self]
+            if self in _handlerList:
+                _handlerList.remove(self)
         finally:
             _releaseLock()