Repair logging test spew caused by rev. 51206.
diff --git a/Lib/logging/config.py b/Lib/logging/config.py
index 511e659..5ea0d15 100644
--- a/Lib/logging/config.py
+++ b/Lib/logging/config.py
@@ -79,7 +79,7 @@
     logging._acquireLock()
     try:
         logging._handlers.clear()
-        logging._handlerList = []
+        del logging._handlerList[:]
         # Handlers add themselves to logging._handlers
         handlers = _install_handlers(cp, formatters)
         _install_loggers(cp, handlers)