From 25a319dc1ae29815a1a0902a0e2c60ed76792f2c Mon Sep 17 00:00:00 2001
From: Yuri Gorshenin <ygorshenin@chromium.org>
Date: Tue, 10 Mar 2015 15:20:51 +0300
Subject: [PATCH] Fixed AlmostEqual() algorithm.

---
 base/string_utils.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/base/string_utils.cpp b/base/string_utils.cpp
index 821e8c5da6..bc5dbd6f32 100644
--- a/base/string_utils.cpp
+++ b/base/string_utils.cpp
@@ -233,8 +233,10 @@ bool AlmostEqual(string const & str1, string const & str2, size_t mismatchedCoun
     mis = mismatch(mis.first, str1End, mis.second);
     if (mis.first == str1End && mis.second == str2End)
       return true;
-    ++mis.first;
-    ++mis.second;
+    if (mis.first != str1End)
+      ++mis.first;
+    if (mis.second != str2End)
+      ++mis.second;
   }
   return false;
 }