[libcxx-commits] [libcxx] [libc++] Add a few _LIBCPP_ASSERT_INTERNALs to make sure internal invariants are kept (PR #114575)

[Konstantin Varlamov via libcxx-commits]

https://github.com/var-const approved this pull request.

Thank you!

https://github.com/llvm/llvm-project/pull/114575