search for: ff473c78

This bot was failing from http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux/builds/29505 until it went green on http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux/builds/29534 Anyone happen to know why? I can't quite figure it out from the commits - would be good to know if it's a buildbot issue or a genuine LLVM problem that was in the LLVM code and fixed by one of those