285 

   286 ### diagnostique tools

   287 #############################

   288 

   289 def unstables(repo):

   290     """Return all unstable changeset"""

   291     return scmutil.revrange(repo, ['obsolete():: and (not obsolete())'])

   292 

   293 def newerversion(repo, obs):

   294     """Return the newer version of an obsolete changeset"""

   295     toproceed = set([obs])

   296     # XXX know optimization available

   297     newer = set()

   298     while toproceed:

   299         current = toproceed.pop()

   300         if current in repo._obsobjrels:

   301             toproceed.update(repo._obsobjrels[current])

   302         elif current is not None: # None is kill

   303             newer.add(current)

   304     return sorted(newer)

   305