From 44f2f4ec45bf8eb75165f38c5f005e0634f00d6e Mon Sep 17 00:00:00 2001
From: Sam McCall <sam.mccall@gmail.com>
Date: Tue, 10 Apr 2018 10:36:46 +0000
Subject: [Tooling] fix UB when interpolating compile commands with an empty
 index

llvm-svn: 329685
---
 clang/lib/Tooling/InterpolatingCompilationDatabase.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'clang/lib/Tooling/InterpolatingCompilationDatabase.cpp')

diff --git a/clang/lib/Tooling/InterpolatingCompilationDatabase.cpp b/clang/lib/Tooling/InterpolatingCompilationDatabase.cpp
index cc292348915..cf29744f307 100644
--- a/clang/lib/Tooling/InterpolatingCompilationDatabase.cpp
+++ b/clang/lib/Tooling/InterpolatingCompilationDatabase.cpp
@@ -373,8 +373,8 @@ private:
   ArrayRef<SubstringAndIndex>
   indexLookup(StringRef Key, const std::vector<SubstringAndIndex> &Idx) const {
     // Use pointers as iteratiors to ease conversion of result to ArrayRef.
-    auto Range =
-        std::equal_range(&Idx[0], &Idx[Idx.size()], Key, Less<Prefix>());
+    auto Range = std::equal_range(Idx.data(), Idx.data() + Idx.size(), Key,
+                                  Less<Prefix>());
     return {Range.first, Range.second};
   }
 
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