# HG changeset patch
# User Augie Fackler <augie@google.com>
# Date 2017-10-15 04:06:06
# Node ID 6be264009841be7fc33e71d2f9eda038ae02fa6e
# Parent  6f532c1a4af0d99cd2cbac5f3c7028c0ba8cb51e

wireproto: use a proper exception instead of `assert False`

Differential Revision: https://phab.mercurial-scm.org/D1101

diff --git a/mercurial/wireproto.py b/mercurial/wireproto.py
--- a/mercurial/wireproto.py
+++ b/mercurial/wireproto.py
@@ -325,7 +325,8 @@ class wirepeer(repository.legacypeer):
                 continue
             keytype = gboptsmap.get(key)
             if keytype is None:
-                assert False, 'unexpected'
+                raise error.ProgrammingError(
+                    'Unexpectedly None keytype for key %s' % key)
             elif keytype == 'nodes':
                 value = encodelist(value)
             elif keytype in ('csv', 'scsv'):