# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@octobus.net>
# Date 1710116412 -3600
# Node ID d54f0692820d649eb193d284412efe778e9ad17b
# Parent  4188a0570ba17e96257eb84d6b556398f3c5c5a5
repoview: prevent `None` to be passed as the filtername

We let such instantiation slip in a previous commit, so we add an explicit check
to prevent it to happen in the future.

diff -r 4188a0570ba1 -r d54f0692820d mercurial/repoview.py
--- a/mercurial/repoview.py	Thu Mar 07 11:04:34 2024 +0100
+++ b/mercurial/repoview.py	Mon Mar 11 01:20:12 2024 +0100
@@ -397,6 +397,9 @@
     """
 
     def __init__(self, repo, filtername, visibilityexceptions=None):
+        if filtername is None:
+            msg = "repoview should have a non-None filtername"
+            raise error.ProgrammingError(msg)
         object.__setattr__(self, '_unfilteredrepo', repo)
         object.__setattr__(self, 'filtername', filtername)
         object.__setattr__(self, '_clcachekey', None)