diff -r 4598e8f43e20 -r 37e793918c07 mercurial/bundlerepo.py
--- a/mercurial/bundlerepo.py	Thu Apr 06 17:45:47 2017 -0700
+++ b/mercurial/bundlerepo.py	Mon Apr 03 09:31:39 2017 -0700
@@ -115,7 +115,8 @@
         elif rev1 <= self.repotiprev and rev2 <= self.repotiprev:
             return revlog.revlog.revdiff(self, rev1, rev2)
 
-        return mdiff.textdiff(self.revision(rev1), self.revision(rev2))
+        return mdiff.textdiff(self.revision(rev1, raw=True),
+                              self.revision(rev2, raw=True))
 
     def revision(self, nodeorrev, raw=False):
         """return an uncompressed revision of a given node or revision