diff -r a2a6755a3def -r 6890b7e991a4 mercurial/configitems.py
--- a/mercurial/configitems.py	Tue Mar 27 20:21:30 2018 +0530
+++ b/mercurial/configitems.py	Sun Mar 04 17:11:33 2018 -0500
@@ -114,7 +114,7 @@
 coreconfigitem = getitemregister(coreitems)
 
 coreconfigitem('alias', '.*',
-    default=None,
+    default=dynamicdefault,
     generic=True,
 )
 coreconfigitem('annotate', 'nodates',