diff --git a/mercurial/commands.py b/mercurial/commands.py
--- a/mercurial/commands.py
+++ b/mercurial/commands.py
@@ -2471,6 +2471,11 @@
     stat = opts.get(b'stat')
     reverse = opts.get(b'reverse')
 
+    if not revs and not change:
+        # Avoid loading obsmarkers if we're accessing only the working copy
+        # parent (which will never be hidden).
+        repo = repo.unfiltered()
+
     if revs and change:
         msg = _(b'cannot specify --rev and --change at the same time')
         raise error.Abort(msg)