diff -r 0be96ac9199a -r d83e51654c8a mercurial/commands.py
--- a/mercurial/commands.py	Sun Mar 26 21:27:02 2017 -0700
+++ b/mercurial/commands.py	Sun Mar 26 21:33:37 2017 -0700
@@ -1807,6 +1807,8 @@
     for t, f in rcutil.rccomponents():
         if t == 'path':
             ui.debug('read config from: %s\n' % f)
+        elif t == 'items':
+            pass
         else:
             raise error.ProgrammingError('unknown rctype: %s' % t)
     untrusted = bool(opts.get('untrusted'))