diff -r 31750413f8d7 -r 8c48a3c088a7 mercurial/logcmdutil.py
--- a/mercurial/logcmdutil.py	Fri Apr 13 22:58:49 2018 +0900
+++ b/mercurial/logcmdutil.py	Fri Apr 13 22:20:13 2018 +0900
@@ -317,7 +317,6 @@
 
     def __init__(self, ui, repo, differ=None, diffopts=None, buffered=False):
         changesetprinter.__init__(self, ui, repo, differ, diffopts, buffered)
-        self.cache = {}
         self._first = True
 
     def close(self):