The rust-src component contains a symlink

[RalfJung]

Extracting the rust-src component with rustup-toolchain-install-master fails because there is a symlink in that component (kennytm/rustup-toolchain-install-master#39). The symlink was introduced some time between 567ad74 and 734233d.

The tool should be fixed, but I wonder -- is that expected? Not all filesystems support symlinks (AFAIK this is a problem on Windows), and so far it seems like there were no symlinks.

[Mark-Simulacrum]

I think this was fixed in #74578.

[RalfJung]

It was indeed, thanks!

[RalfJung]

This is unfortunate though as it landed after the other PR that broke Miri again recently (#69749)... making it now 4 days straight during which it was impossible to build Miri against rustc master. We keep fixing things but new breakage is landing before the fixes make it through.^^

[Mark-Simulacrum]

Yeah we're reverting gimli entirely in a bit (hopefully not rebreaking anything) but next time we land it I plan to do some try-testing to make sure it's not breaking rustup etc.

I also hope to add tests that we don't have symlinks to our dist builders.