diff --git a/mercurial/commands.py b/mercurial/commands.py --- a/mercurial/commands.py +++ b/mercurial/commands.py @@ -1208,7 +1208,7 @@ raise error.Abort(_("--base is incompatible with specifying " "a destination")) common = [repo.lookup(rev) for rev in base] - heads = revs and map(repo.lookup, revs) or None + heads = map(repo.lookup, revs) if revs else None outgoing = discovery.outgoing(repo, common, heads) else: dest = ui.expandpath(dest or 'default-push', dest or 'default')