diff -r 0132221c25cd -r 876494fd967d mercurial/manifest.py
--- a/mercurial/manifest.py	Mon Sep 24 14:46:37 2018 -0700
+++ b/mercurial/manifest.py	Thu Jan 17 09:17:12 2019 -0800
@@ -283,7 +283,6 @@
         if len(self.extradata) == 0:
             return
         l = []
-        last_cut = 0
         i = 0
         offset = 0
         self.extrainfo = [0] * len(self.positions)