I am somewhat pessimistic because LLVM is significantly behind GCC in debug information quality (for example, see https://robert.ocallahan.org/2018/11/comparing

I am somewhat pessimistic because LLVM is significantly behind GCC in debug information quality (for example, see https://robert.ocallahan.org/2018/11/comparing-quality-of-debug-information.html https://robert.ocallahan.org/2018/11/comparing-quality-of-de...) and there is limit to what Rust can do about it short of fixing LLVM.