cargo: update users to 0.8

[lucab]

No description provided.

[lucab]

/cc @sdemos for review

[sdemos]

hmm that's odd, it looks like the api changed slightly. the string it's returning is from the ffi library. it looks like newer rust handles that correctly but the version we are using in CL doesn't?

[sdemos]

actually it turns out that we are on rust 1.28 now (coreos/coreos-overlay#3378) so we should actually just bump the ci version and see if that fixes it

[lucab]

Ah, I didn't see this locally as I have a 1.29 (where this is fine). I'll check tomorrow and see if I manage to make it work on 1.26 too. My guess is that it may be rust-lang/rust#51178, which is new in 1.29 anyway.

[sdemos]

alright, that makes sense. fwiw we will be bumping up to 1.29 at some point apparently per @dm0- (pending some eclass work), but it seems like the fix is probably as simple as changing it to "root".into(), so we can probably just do that.

[dm0-]

The CL Rust 1.29 upgrade is coreos/portage-stable#688 which depends on coreos/portage-stable#690. Assuming 690 gets reviewed this week, it will be in the alpha next Tuesday.

[dm0-]

The dependency PR was merged, and I'm running one last test build on the Rust update. CL should be on 1.29 tomorrow.

[lucab]

@sdemos @dm0- thanks both, but I prefer not to hard-require latest toolchain (that would haunt me back in rpm land, pretty sure). I've adjusted this PR so that it's green on 1.26. I didn't realize I was using some newer Rust features, glad that travis caught that!

Tailor is still dead tough.

[sdemos]

that works for me. everything looks good.