tree 52bc286c2423c90a94cacc8e53357fca24e14734
parent 6dbd31d6be86b22da7c1789f4f47d55c35c8ebf1
author Walter Erquinigo <wallace@fb.com> 1637687819 -0800
committer Copybara-Service <copybara-worker@google.com> 1637704879 -0800

Improve optional formatter

As suggested by @labath in https://reviews.llvm.org/D114403, we should
make the formatter more resilient to corrupted data. The Libcxx version
explicitly checks for engaged = 1, so we can do that as well for safety.

Differential Revision: https://reviews.llvm.org/D114450

GitOrigin-RevId: 4ba5da8e3d38f38ed7845c22baadd8908729c520