From 9c23644e7bfd259bc63589564ef9303b279d727a Mon Sep 17 00:00:00 2001
From: Andreas Kloeckner <inform@tiker.net>
Date: Mon, 3 Oct 2016 18:42:15 -0500
Subject: [PATCH] Fix error condition in LexIterator.is_next
---
pytools/lex.py | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/pytools/lex.py b/pytools/lex.py
index a1c4914..3322d0c 100644
--- a/pytools/lex.py
+++ b/pytools/lex.py
@@ -136,7 +136,9 @@ class LexIterator(object):
return self.index + i >= len(self.lexed)
def is_next(self, tag, i=0):
- return self.next_tag(i) is tag
+ return (
+ self.index + i < len(self.lexed)
+ and self.next_tag(i) is tag)
def raise_parse_error(self, msg):
if self.is_at_end():
--
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