Extended Description

We have a fuzzer of clang-format in the source tree.
Details: llvm/lib/Fuzzer/README.txt

It has found a few bugs so far:
r226685, r226678, r226451, r226446, r226448, r227427, r226447,
r226685, r226680, r226698, r229485, r227677, r227433, r227427,
r230395, r231066, (probably missed a couple more)

There are a few remaining, we will be posting them here, one per comment.

There is also a build bot which runs the fuzzer 24/7 and will report new
bugs (regressions) if they appear or old bugs if the fuzzer discovers them.
http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux-fuzzer