[clang] Fix crash with modules and constexpr destructor (PR #69076)

[Chuanqi Xu via cfe-commits]

ChuanqiXu9 wrote:

The key point now is the rationale why this change relates to modules. It looks not good to proceed without understanding this. Otherwise we're playing with a black box... And the concrete method, ..., well, I guess we had no choice but debugging it hardly. For example, comparing the behavior of clang with and without the change.

https://github.com/llvm/llvm-project/pull/69076