[clang] [clang-tools-extra] [clang] Improve nested name specifier AST representation (PR #147835)

[Matheus Izvekov via cfe-commits]

mizvekov wrote:

> I don't know if this is the same as the other crash report, but we're also seeing assert failures when building chromium. I've minimized the repro to the following program:

Thanks, this is going to be fixed by https://github.com/llvm/llvm-project/pull/153862

https://github.com/llvm/llvm-project/pull/147835