Issue #8581: logging: removed errors raised when closing handlers twice.

Lib/logging/__init__.py

@@ -702,7 +702,9 @@ class Handler(Filterer):
         #get the module data lock, as we're updating a shared structure.
         _acquireLock()
         try:    #unlikely to raise an exception, but you never know...
+            if self in _handlers:
                 del _handlers[self]
+            if self in _handlerList:
                 _handlerList.remove(self)
         finally:
             _releaseLock()

Misc/NEWS

@@ -33,6 +33,8 @@ Core and Builtins
 Library
 -------
 
+- Issue #8581: logging: removed errors raised when closing handlers twice.
+
 - Issue #4687: Fix accuracy of garbage collection runtimes displayed with
   gc.DEBUG_STATS.