Lint for adding `crate::` misses a renamed extern crate:

[alexcrichton]

The following code:

#![warn(rust_2018_compatibility)]
#![allow(dead_code, unused_imports)]
#![feature(rust_2018_preview)]

extern crate libc as foo;

use foo::getpid;

fn main() {}

generates no warnings, but when compiling with --edition 2018 it will yield an error about no crate foo

[Mark-Simulacrum]

Is this something we expect rustfix to work with? It would have to move the rename into Cargo.toml, right? I don't know if we expect it to make changes there.

[alexcrichton]

In the sense that this prevents entering the 2018 edition I think we'll want rustfix to handle this yeah. Although the ideal solution here is to add the rename to Cargo.toml using use crate::foo::getpid will also work in this situation. Editing Cargo.toml I think is definitely outside of rustfix's scope, though

[nikomatsakis]

Got a fix