--- a/mercurial/util.py Mon Jan 30 22:50:20 2017 +0900
+++ b/mercurial/util.py Mon Jan 30 22:58:56 2017 -0800
@@ -550,7 +550,7 @@
except ValueError:
pass
def keys(self):
- return self._list
+ return self._list[:]
def iterkeys(self):
return self._list.__iter__()
def iteritems(self):