From: Richard Smith <richard-llvm@metafoo.co.uk>
Date: Sat, 22 Dec 2012 00:15:13 +0000 (+0000)
Subject: Don't call back() on an empty SmallVector. Found by -fsanitize=enum!
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=2b45dd58b22da40bb08e82d1564ccecca4a700f5;p=oota-llvm.git

Don't call back() on an empty SmallVector. Found by -fsanitize=enum!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170968 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Support/YAMLTraits.cpp b/lib/Support/YAMLTraits.cpp
index a31c31915a1..8fcef40d243 100644
--- a/lib/Support/YAMLTraits.cpp
+++ b/lib/Support/YAMLTraits.cpp
@@ -516,7 +516,7 @@ void Output::output(StringRef s) {
 
 void Output::outputUpToEndOfLine(StringRef s) {
   this->output(s);
-  if (StateStack.back() != inFlowSeq)
+  if (StateStack.empty() || StateStack.back() != inFlowSeq)
     NeedsNewLine = true;
 }