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Commit 49ebe63b authored by Chandler Carruth's avatar Chandler Carruth
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[UB] Guard two calls to memcpy in generated attribute code to handle 

null StringRef objects as inputs.

Found by UBSan.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@243949 91177308-0d34-0410-b5e6-96231b3b80d8
parent 35ae9a51
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