# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@octobus.net>
# Date 2019-11-08 13:00:22
# Node ID 7f489b9a79a1211edc70dc89599f12fe7100f39f
# Parent  bf6fa330e0a5d8b8559cebcfdbb392ff6179b811

index: use `index.has_node` in `repo._rollback`

Differential Revision: https://phab.mercurial-scm.org/D7329

diff --git a/mercurial/localrepo.py b/mercurial/localrepo.py
--- a/mercurial/localrepo.py
+++ b/mercurial/localrepo.py
@@ -2351,7 +2351,8 @@ class localrepository(object):
             self.svfs.rename(b'undo.phaseroots', b'phaseroots', checkambig=True)
         self.invalidate()
 
-        parentgone = any(p not in self.changelog.nodemap for p in parents)
+        has_node = self.changelog.index.has_node
+        parentgone = any(not has_node(p) for p in parents)
         if parentgone:
             # prevent dirstateguard from overwriting already restored one
             dsguard.close()