pythoncapi
diff --git a/‎Lib/idlelib/macosxSupport.py‎
Lines changed: 6 additions & 0 deletions b/‎Lib/idlelib/macosxSupport.py‎
Lines changed: 6 additions & 0 deletions
@@ -82,6 +82,12 @@ def about_dialog(event=None):
 
     def config_dialog(event=None):
         from idlelib import configDialog
+
+        # Ensure that the root object has an instance_dict attribute,
+        # mirrors code in EditorWindow (although that sets the attribute
+        # on an EditorWindow instance that is then passed as the first
+        # argument to ConfigDialog)
+        root.instance_dict = flist.inversedict
         configDialog.ConfigDialog(root, 'Settings')