[PATCH] D41048: [libcxx] workaround PR 28385 in __find_exactly_one_checked

[Casey Carter via Phabricator via cfe-commits]

CaseyCarter added a comment.

In https://reviews.llvm.org/D41048#950635, @mclow.lists wrote:

> Ah - that was the factor I was missing.
>  The tests pass for me with `-std=c++2a`, but fail for `std=c++17`
>
> Casey's original post said they fail with `2a`, and I'm *still* not seeing that.


They fail for me both with -std=c++2a and -std=c++17.


https://reviews.llvm.org/D41048