diff -r ae92c3eee88e -r 0d83ad967bf8 mercurial/merge.py
--- a/mercurial/merge.py	Fri Jun 10 00:25:07 2016 -0400
+++ b/mercurial/merge.py	Fri Jun 10 00:12:33 2016 -0400
@@ -8,6 +8,7 @@
 from __future__ import absolute_import
 
 import errno
+import hashlib
 import os
 import shutil
 import struct
@@ -408,7 +409,7 @@
         if fcl.isabsent():
             hash = nullhex
         else:
-            hash = util.sha1(fcl.path()).hexdigest()
+            hash = hashlib.sha1(fcl.path()).hexdigest()
             self._repo.vfs.write('merge/' + hash, fcl.data())
         self._state[fd] = ['u', hash, fcl.path(),
                            fca.path(), hex(fca.filenode()),