[PATCH] D29063: [libcxx] Never use <cassert> within libc++

[Eric Fiselier via Phabricator via cfe-commits]

EricWF added a comment.

It seems like weird usages of `_LIBCPP_ASSERT` in `<string_view>` are causing this problem.
Specifically the usages in `<string_view>` attempt to use `_LIBCPP_ASSERT` in C++11 constexpr functions and this currently does not work.

For now I've reverted this change in r292923.


https://reviews.llvm.org/D29063