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

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170968 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Richard Smith 2012-12-22 00:15:13 +00:00
parent d0696ef8c3
commit 2b45dd58b2
1 changed files with 1 additions and 1 deletions
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2
lib/Support/YAMLTraits.cpp
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@ -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;
}