# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@octobus.net>
# Date 1709805874 -3600
# Node ID 4188a0570ba17e96257eb84d6b556398f3c5c5a5
# Parent  9007387a227c0c884423a6b4b66a3cad18917eec
branchcache: avoid created a `None` filter repoview when writing

The repoview class is not intended to be used for unfiltered repository.

diff -r 9007387a227c -r 4188a0570ba1 mercurial/branchmap.py
--- a/mercurial/branchmap.py	Mon Feb 26 15:26:08 2024 +0100
+++ b/mercurial/branchmap.py	Thu Mar 07 11:04:34 2024 +0100
@@ -168,7 +168,10 @@
         unfi = repo.unfiltered()
         for filtername, cache in self._per_filter.items():
             if cache._delayed:
-                repo = unfi.filtered(filtername)
+                if filtername is None:
+                    repo = unfi
+                else:
+                    repo = unfi.filtered(filtername)
                 cache.write(repo)