--- a/mercurial/verify.py	Wed Apr 22 02:01:22 2009 +0200
+++ b/mercurial/verify.py	Wed Apr 22 02:01:22 2009 +0200
@@ -14,7 +14,7 @@
     try:
         return _verify(repo)
     finally:
-        del lock
+        lock.release()
 
 def _verify(repo):
     mflinkrevs = {}