From 968eab3d11a99198dd0837a3d02ca5e63d547a19 Mon Sep 17 00:00:00 2001
From: Cheryl Sabella <cheryl.sabella@gmail.com>
Date: Sat, 26 Aug 2017 12:57:46 -0400
Subject: [PATCH] bpo-31284: IDLE: Fix WindowList warning message when running
 tests

---
 Lib/idlelib/editor.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Lib/idlelib/editor.py b/Lib/idlelib/editor.py
index 43b105f726573d1..f639a27dd0bf7c7 100644
--- a/Lib/idlelib/editor.py
+++ b/Lib/idlelib/editor.py
@@ -388,7 +388,10 @@ def createmenubar(self):
     def postwindowsmenu(self):
         # Only called when Windows menu exists
         menu = self.menudict['windows']
-        end = menu.index("end")
+        try:
+            end = menu.index("end")
+        except TclError:
+            return
         if end is None:
             end = -1
         if end > self.wmenu_end: