--- a/mercurial/revsetlang.py Wed Aug 01 12:57:15 2018 -0700
+++ b/mercurial/revsetlang.py Wed Aug 01 13:00:45 2018 -0700
@@ -63,7 +63,7 @@
_syminitletters = set(pycompat.iterbytestr(
string.ascii_letters.encode('ascii') +
string.digits.encode('ascii') +
- '._@')) | set(map(pycompat.bytechr, xrange(128, 256)))
+ '._@')) | set(map(pycompat.bytechr, pycompat.xrange(128, 256)))
# default set of valid characters for non-initial letters of symbols
_symletters = _syminitletters | set(pycompat.iterbytestr('-/'))