From 909545a822eef491158f831688066f0ec2866938 Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Mon, 9 Jan 2017 21:23:09 +0000
Subject: Vendor import of llvm trunk r291476:
 https://llvm.org/svn/llvm-project/llvm/trunk@291476

---
 lib/Support/CommandLine.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'lib/Support/CommandLine.cpp')

diff --git a/lib/Support/CommandLine.cpp b/lib/Support/CommandLine.cpp
index 0a989706b4361..3889902eea54a 100644
--- a/lib/Support/CommandLine.cpp
+++ b/lib/Support/CommandLine.cpp
@@ -373,7 +373,7 @@ void Option::removeArgument() { GlobalParser->removeOption(this); }
 void Option::setArgStr(StringRef S) {
   if (FullyInitialized)
     GlobalParser->updateArgStr(this, S);
-  assert(S[0] != '-' && "Option can't start with '-");
+  assert((S.empty() || S[0] != '-') && "Option can't start with '-");
   ArgStr = S;
 }
 
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