165         ph = self.__class__(None, None, _load=False)

   165         ph = self.__class__(None, None, _load=False)

   166         ph.phaseroots = self.phaseroots[:]

   166         ph.phaseroots = self.phaseroots[:]

   167         ph.dirty = self.dirty

   167         ph.dirty = self.dirty

   168         ph.opener = self.opener

   168         ph.opener = self.opener

   169         ph._phaserevs = self._phaserevs

   169         ph._phaserevs = self._phaserevs

   170         return ph

   171         return ph

   171 

   172 

   172     def replace(self, phcache):

   173     def replace(self, phcache):

   173         for a in 'phaseroots dirty opener _phaserevs'.split():

   174         for a in 'phaseroots dirty opener _phaserevs'.split():

   174             setattr(self, a, getattr(phcache, a))

   175             setattr(self, a, getattr(phcache, a))