# HG changeset patch
# User Raphaël Gomès <rgomes@octobus.net>
# Date 2021-11-25 17:26:50
# Node ID 897aa0c4da4ab0b418c23cc69b1497e8d4649586
# Parent  602120a9607278184579090c97ef812b602fdf4b

downgrade: don't assume existence of nodemap files when downgrading

Persistent nodemap files might not exist on a fresh repository, so ignore the
potential missing file errors.

Differential Revision: https://phab.mercurial-scm.org/D11806

diff --git a/mercurial/revlogutils/nodemap.py b/mercurial/revlogutils/nodemap.py
--- a/mercurial/revlogutils/nodemap.py
+++ b/mercurial/revlogutils/nodemap.py
@@ -147,7 +147,7 @@ def delete_nodemap(tr, repo, revlog):
     if revlog._nodemap_file is None:
         msg = "calling persist nodemap on a revlog without the feature enabled"
         raise error.ProgrammingError(msg)
-    repo.svfs.unlink(revlog._nodemap_file)
+    repo.svfs.tryunlink(revlog._nodemap_file)
 
 
 def persist_nodemap(tr, revlog, pending=False, force=False):