diff -r a2a6755a3def -r 6890b7e991a4 hgext/show.py
--- a/hgext/show.py	Tue Mar 27 20:21:30 2018 +0530
+++ b/hgext/show.py	Sun Mar 04 17:11:33 2018 -0500
@@ -427,7 +427,7 @@
                 continue
 
             # Same for aliases.
-            if ui.config('alias', name):
+            if ui.config('alias', name, None):
                 continue
 
             ui.setconfig('alias', name, 'show %s' % view, source='show')