From d585a20394704bc7812489fc7a6af8136589c465 Mon Sep 17 00:00:00 2001
From: Jonas Devlieghere <jonas@devlieghere.com>
Date: Thu, 14 Sep 2017 17:46:23 +0000
Subject: [PATCH] [test] Fix TestDWARFDieRangeInfoIntersects

Fixes heap buffer overflow triggered in DWARF verifier, detected by ASAN.

llvm-svn: 313280
---
 llvm/lib/DebugInfo/DWARF/DWARFVerifier.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/llvm/lib/DebugInfo/DWARF/DWARFVerifier.cpp b/llvm/lib/DebugInfo/DWARF/DWARFVerifier.cpp
index 04530c44d87a..24a0e67b003b 100644
--- a/llvm/lib/DebugInfo/DWARF/DWARFVerifier.cpp
+++ b/llvm/lib/DebugInfo/DWARF/DWARFVerifier.cpp
@@ -89,6 +89,8 @@ bool DWARFVerifier::DieRangeInfo::intersects(const DieRangeInfo &RHS) const {
   auto End = Ranges.end();
   auto Iter = findRange(RHS.Ranges.front());
   for (const auto &R : RHS.Ranges) {
+    if(Iter == End)
+      return false;
     if (R.HighPC <= Iter->LowPC)
       continue;
     while (Iter != End) {