--- a/mercurial/commands.py	Sat Feb 06 16:50:00 2010 +0100
+++ b/mercurial/commands.py	Sat Feb 06 19:00:50 2010 +0100
@@ -1419,9 +1419,6 @@
     closed = opts.get('closed')
     hideinactive, _heads = opts.get('active'), None
     if not branchrevs:
-        if closed:
-            raise error.Abort(_('you must specify a branch to use --closed'))
-        # Assume we're looking repo-wide heads if no revs were specified.
         heads = repo.heads(start)
 
     else:

--- a/tests/test-branches.out	Sat Feb 06 16:50:00 2010 +0100
+++ b/tests/test-branches.out	Sat Feb 06 19:00:50 2010 +0100
@@ -63,7 +63,26 @@
 c                              6:589736a22561 (inactive)
 a                              5:d8cbc61dbaa6 (inactive)
 default                        0:19709c5a4e75 (inactive)
-abort: you must specify a branch to use --closed
+changeset:   10:bfbe841b666e
+branch:      b
+tag:         tip
+user:        test
+date:        Thu Jan 01 00:00:09 1970 +0000
+summary:     adding another cset to branch b
+
+changeset:   8:eebb944467c9
+branch:      b
+parent:      4:aee39cd168d0
+user:        test
+date:        Thu Jan 01 00:00:07 1970 +0000
+summary:     adding cset to branch b
+
+changeset:   7:10ff5895aa57
+branch:      a branch name much longer than the default justification used by branches
+user:        test
+date:        Thu Jan 01 00:00:06 1970 +0000
+summary:     Adding d branch
+
 changeset:   10:bfbe841b666e
 branch:      b
 tag:         tip