diff -r 616a455b02ca -r c1ca47204590 mercurial/localrepo.py
--- a/mercurial/localrepo.py	Wed Aug 06 01:54:19 2014 -0700
+++ b/mercurial/localrepo.py	Tue Aug 05 23:52:21 2014 -0700
@@ -1442,7 +1442,7 @@
                 # be compliant anyway
                 #
                 # if minimal phase was 0 we don't need to retract anything
-                phases.retractboundary(self, targetphase, [n])
+                phases.retractboundary(self, tr, targetphase, [n])
             tr.close()
             branchmap.updatecache(self.filtered('served'))
             return n