[clang] [llvm] [clang][LLVM Demangler] Add an assertion that validates that all mang… (PR #111391)

[Viktoriia Bakalova via cfe-commits]

VitaNuo wrote:

Totally agree to 2 to 4.

Regarding the testing and => default enablement, I think we'll have to first see how many failures we'll see on LLVM + Google internal codebase. It's hard to tell at this point how many of those there will be, and so how feasible it is (or how soon it is feasible) to enable the warning by default.


https://github.com/llvm/llvm-project/pull/111391