--- a/src/topic/__init__.py	Mon Mar 14 00:15:54 2016 +0000
+++ b/src/topic/__init__.py	Sun Mar 13 23:44:04 2016 +0000
@@ -69,10 +69,12 @@
     """use awful monkey patching to update the topic cache"""
     oldbranchcache = branchmap.branchcache
     oldfilename = branchmap._filename
+    oldread = branchmap.read
     oldcaches =  getattr(repo, '_branchcaches', {})
     try:
         branchmap.branchcache = topicmap.topiccache
         branchmap._filename = topicmap._filename
+        branchmap.read = topicmap.readtopicmap
         repo._branchcaches = getattr(repo, '_topiccaches', {})
         yield
         repo._topiccaches = repo._branchcaches
@@ -80,6 +82,7 @@
         repo._branchcaches = oldcaches
         branchmap.branchcache = oldbranchcache
         branchmap._filename = oldfilename
+        branchmap.read = oldread
 
 def cgapply(orig, repo, *args, **kwargs):
     with usetopicmap(repo):