# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@octobus.net>
# Date 2019-11-17 06:25:14
# Node ID c0e04f07a2d4bf29b8e894d447a90ef837ed20c1
# Parent  099e9610308546bfbf6ff946f4a38a814cfbbc0d

localrepo: recognize trivial "null" queries in `anyrev`

Bypassing the revset logic for trivial "null" queries means we can avoid to
trigger the filtering logic in some cases.

Differential Revision: https://phab.mercurial-scm.org/D7481

diff --git a/mercurial/localrepo.py b/mercurial/localrepo.py
--- a/mercurial/localrepo.py
+++ b/mercurial/localrepo.py
@@ -1652,6 +1652,8 @@ class localrepository(object):
         definitions overriding user aliases, set ``localalias`` to
         ``{name: definitionstring}``.
         '''
+        if specs == [b'null']:
+            return revset.baseset([nullrev])
         if user:
             m = revset.matchany(
                 self.ui,
diff --git a/tests/test-repo-filters-tiptoe.t b/tests/test-repo-filters-tiptoe.t
--- a/tests/test-repo-filters-tiptoe.t
+++ b/tests/test-repo-filters-tiptoe.t
@@ -49,5 +49,4 @@ Getting the node of `null`
   $ hg init test-repo
   $ cd test-repo
   $ hg log -r null -T "{node}\n"
-  debug.filters: computing revision filter for "visible"
   0000000000000000000000000000000000000000