mercurial/branchmap.py

--- a/mercurial/branchmap.py	Tue Feb 10 20:06:12 2015 -0800
+++ b/mercurial/branchmap.py	Tue Feb 24 18:43:31 2015 -0800
@@ -97,9 +97,6 @@
         partial.update(repo, revs)
         partial.write(repo)
 
-    if repo._revbranchcache is not None:
-        repo._revbranchcache.write()
-
     assert partial.validfor(repo), filtername
     repo._branchcaches[repo.filtername] = partial