diff -r 0e2274a776c7 Lib/idlelib/MultiCall.py
--- a/Lib/idlelib/MultiCall.py	Sat Apr 14 21:58:33 2012 -0400
+++ b/Lib/idlelib/MultiCall.py	Sun Apr 15 16:17:05 2012 -0500
@@ -170,8 +170,9 @@
                     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