phase: also copy phase's sets when copying phase cache
We forgot to add such copy when we added the attributes.
--- a/mercurial/phases.py Tue Jun 16 16:15:15 2015 -0400
+++ b/mercurial/phases.py Mon Jun 15 15:52:52 2015 -0700
@@ -167,6 +167,7 @@
ph.dirty = self.dirty
ph.opener = self.opener
ph._phaserevs = self._phaserevs
+ ph._phasesets = self._phasesets
return ph
def replace(self, phcache):