--- a/hgext3rd/topic/__init__.py	Fri Sep 22 16:41:37 2017 +0200
+++ b/hgext3rd/topic/__init__.py	Tue Sep 26 12:56:03 2017 +0200
@@ -312,8 +312,10 @@
                 peer.__class__ = topicpeer
             return peer
 
-        def transaction(self, *a, **k):
-            tr = super(topicrepo, self).transaction(*a, **k)
+        def transaction(self, desc, *a, **k):
+            tr = super(topicrepo, self).transaction(desc, *a, **k)
+            if desc == 'strip':
+                return tr
 
             reporef = weakref.ref(self)