#8900: merge with 3.3.

Lib/idlelib/MultiCall.py

@@ -170,8 +170,9 @@ class _ComplexBinder:
                     break
             ishandlerrunning[:] = []
             # Call all functions in doafterhandler and remove them from list
-            while doafterhandler:
-                doafterhandler.pop()()
+            for f in doafterhandler:
+                f()
+            doafterhandler[:] = []
             if r:
                 return r
         return handler

Misc/NEWS

@@ -297,6 +297,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #8900: Using keyboard shortcuts in IDLE to open a file no longer 
+  raises an exception.
+
 - Issue #6649: Fixed missing exit status in IDLE. Patch by Guilherme Polo.
 
 - Issue #17435: threading.Timer's __init__ method no longer uses mutable