523             # "solve" constraint satisfaction problem

   523             # "solve" constraint satisfaction problem

   524             if cube not in self.cubes:

   524             if cube not in self.cubes:

   525                 self.errors.append( ('add', cube, version, source) )

   525                 self.errors.append( ('add', cube, version, source) )

   526             elif versions:

   526             elif versions:

   527                 lower_strict = version_strictly_lower(self.cubes[cube], version)

   527                 lower_strict = version_strictly_lower(self.cubes[cube], version)

   529                     if lower_strict:

   529                     if lower_strict:

   530                         self.errors.append( ('update', cube, version, source) )

   530                         self.errors.append( ('update', cube, version, source) )

   531                 elif oper is None:

   531                 elif oper is None:

   532                     pass # no constraint on version

   532                     pass # no constraint on version

   533                 else:

   533                 else: