Use statement not migrated

[Swoorup]

Use statements doesn't migrate to 2018 when using
cargo fix --edition

I later realized this was on a project which had all warnings turned off. Should rustfix, somehow understand warnings regardless of the warnings suppress by the user?

https://github.com/rustlang-cn/Rust-webapp-starter

[Enselic]

Triage: I think this issue should be moved to https://github.com/rust-lang/rustfix/issues?

[ehuss]

I believe this was fixed in 2021 via #85788 and rust-lang/cargo#9588. From what I can gather (the linked repo is no longer available), it sounds like they were allowing warnings. The force-warn system now forces warnings to be applied.

@Enselic, just FYI, the rustfix repo will be closing soon. Most suggested diagnostic issues should remain in this repo. Also, before transferring an issue, it is helpful to have a reproduction or enough information to assess where the issue lies.