From 2be59141b8512fd0aefacdcbd687eef85d96c86d Mon Sep 17 00:00:00 2001
From: David Majnemer <david.majnemer@gmail.com>
Date: Sat, 28 May 2016 05:59:22 +0000
Subject: [PATCH] An empty record cannot be null-terminated

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271104 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/DebugInfo/CodeView/RecordSerialization.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/llvm/DebugInfo/CodeView/RecordSerialization.h b/include/llvm/DebugInfo/CodeView/RecordSerialization.h
index ef44f9d9418..84179f5f81f 100644
--- a/include/llvm/DebugInfo/CodeView/RecordSerialization.h
+++ b/include/llvm/DebugInfo/CodeView/RecordSerialization.h
@@ -140,6 +140,9 @@ struct serialize_null_term_string_array_impl {
       : Item(Item) {}
 
   std::error_code deserialize(ArrayRef<uint8_t> &Data) const {
+    if (Data.empty())
+      return std::make_error_code(std::errc::illegal_byte_sequence);
+
     StringRef Field;
     // Stop when we run out of bytes or we hit record padding bytes.
     while (Data.front() != 0) {
-- 
2.11.0