--- a/hgext3rd/topic/__init__.py	Mon Oct 23 15:11:48 2017 +0200
+++ b/hgext3rd/topic/__init__.py	Mon Oct 23 15:25:00 2017 +0200
@@ -517,16 +517,16 @@
             raise error.Abort('changing topic requires a topic name or --clear')
         if repo.revs('%ld and public()', touchedrevs):
             raise error.Abort("can't change topic of a public change")
-        wl = l = txn = None
+        wl = lock = txn = None
         try:
             wl = repo.wlock()
-            l = repo.lock()
+            lock = repo.lock()
             txn = repo.transaction('rewrite-topics')
             rewrote = _changetopics(ui, repo, touchedrevs, topic)
             txn.close()
             ui.status('changed topic on %d changes\n' % rewrote)
         finally:
-            lockmod.release(txn, l, wl)
+            lockmod.release(txn, lock, wl)
             repo.invalidate()
         return