[clang] -ast-dump-decl-types crashes on codes involving concepts #94928 (PR #108142)

[via cfe-commits]

ofAlpaca wrote:

> Also, please add the example code from the linked issue to `ast-dump-concepts.cpp` so that we more clearly demonstrate that the issue was fixed.

Hi @AaronBallman 
The example code provided by @zyn0217 has already in the `ast-dump-concepts.cpp`.


https://github.com/llvm/llvm-project/pull/108142