--- a/hgext3rd/topic/__init__.py	Tue Sep 26 19:05:04 2017 +0530
+++ b/hgext3rd/topic/__init__.py	Wed Sep 27 00:00:22 2017 +0200
@@ -315,7 +315,7 @@
         def transaction(self, desc, *a, **k):
             ctr = self.currenttransaction()
             tr = super(topicrepo, self).transaction(desc, *a, **k)
-            if desc is 'strip' or ctr is not None:
+            if desc in ('strip', 'repair') or ctr is not None:
                 return tr
 
             # real transaction start