diff -r cbeb54ec0481 -r d83ca854fa21 mercurial/dispatch.py
--- a/mercurial/dispatch.py	Wed Nov 30 19:23:04 2016 +0000
+++ b/mercurial/dispatch.py	Sat Oct 22 14:35:10 2016 +0900
@@ -101,7 +101,7 @@
 
     try:
         if not req.ui:
-            req.ui = uimod.ui()
+            req.ui = uimod.ui.load()
         if '--traceback' in req.args:
             req.ui.setconfig('ui', 'traceback', 'on', '--traceback')