--- a/hgext3rd/topic/__init__.py	Thu Jun 22 15:18:49 2017 +0200
+++ b/hgext3rd/topic/__init__.py	Fri Jun 23 10:21:37 2017 +0200
@@ -229,7 +229,7 @@
 
         def branchmap(self, topic=None):
             if topic is None:
-                topic = self._autobranchmaptopic
+                topic = getattr(repo, '_autobranchmaptopic', False)
             topicfilter = topicmap.topicfilter(self.filtername)
             if not topic or topicfilter == self.filtername:
                 return super(topicrepo, self).branchmap()

--- a/hgext3rd/topic/topicmap.py	Thu Jun 22 15:18:49 2017 +0200
+++ b/hgext3rd/topic/topicmap.py	Fri Jun 23 10:21:37 2017 +0200
@@ -103,7 +103,7 @@
     extensions.wrapfunction(branchmap, 'updatecache', _wrapupdatebmcache)
 
 def _wrapupdatebmcache(orig, repo):
-    previous = repo._autobranchmaptopic
+    previous = getattr(repo, '_autobranchmaptopic', False)
     try:
         repo._autobranchmaptopic = False
         return orig(repo)