--- a/hgext3rd/topic/topicmap.py	Fri Jul 12 08:17:25 2019 -0700
+++ b/hgext3rd/topic/topicmap.py	Thu Jul 11 16:00:25 2019 -0700
@@ -80,7 +80,7 @@
     if revs:
         s = hashlib.sha1()
         for rev in revs:
-            s.update('%s;' % rev)
+            s.update('%d;' % rev)
         key = s.digest()
     return key