diff -r ccef71de7d41 -r 2b6692df1bdf mercurial/localrepo.py
--- a/mercurial/localrepo.py	Tue May 02 21:35:06 2017 +0200
+++ b/mercurial/localrepo.py	Tue May 02 18:56:07 2017 +0200
@@ -1794,7 +1794,6 @@
                 # if minimal phase was 0 we don't need to retract anything
                 phases.retractboundary(self, tr, targetphase, [n])
             tr.close()
-            branchmap.updatecache(self.filtered('served'))
             return n
         finally:
             if tr: