From 43f84098b8dd9d86a86389b3909cb14e39c5cc74 Mon Sep 17 00:00:00 2001
From: Max Brunsfeld <maxbrunsfeld@gmail.com>
Date: Fri, 15 Jun 2018 15:35:50 -0700
Subject: [PATCH] Fix crash on unexpected closing tag after error

---
 src/scanner.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/scanner.cc b/src/scanner.cc
index ad8dab7..8421e50 100644
--- a/src/scanner.cc
+++ b/src/scanner.cc
@@ -144,7 +144,7 @@ struct Scanner {
 
     if (is_closing_tag) {
       // The tag correctly closes the topmost element on the stack
-      if (next_tag == tags.back()) return false;
+      if (!tags.empty() && tags.back() == next_tag) return false;
 
       // Otherwise, dig deeper and queue implicit end tags (to be nice in
       // the case of malformed HTML)