mercurial/patch.py

--- a/mercurial/patch.py	Fri Jun 10 00:25:07 2016 -0400
+++ b/mercurial/patch.py	Fri Jun 10 00:12:33 2016 -0400
@@ -12,6 +12,7 @@
 import copy
 import email
 import errno
+import hashlib
 import os
 import posixpath
 import re
@@ -2412,7 +2413,7 @@
         if not text:
             text = ""
         l = len(text)
-        s = util.sha1('blob %d\0' % l)
+        s = hashlib.sha1('blob %d\0' % l)
         s.update(text)
         return s.hexdigest()