Comment # 9 on bug 1112817 from Luke Jones

> Was rust and cargo in the past switching version in the same pace. So rust 1.26 > and cargo 0.27 or something?
>
> In any case the Firefox configure check expects this:
> 
>     rustc_min_version = Version('1.28.0')
>     cargo_min_version = rustc_min_version
> 
> So I expect we need cargo 1.28 at least as well.

This is correct. The Rust spec now builds all included tools [cargo, rustfmt,
rls, clippy, analysis]. Cargo should have the version changed to 1.30.0, so
maybe if you set the minimum version to that for cargo it could help?

** Just checked, I think we need to delete existing cargo from all releases to
resolve this. I'm unsure what else I can do to help the situation.

Is there something like an: Obsoletes: cargo <= 0.28? Would that work?

It's been tough getting this sorted as it takes 6-12 hours to build Rust on the
available hardware.