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warning: unused extern crate
--> $DIR/remove-extern-crate.rs:9:1
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LL | extern crate core;
| ^^^^^^^^^^^^^^^^^^ help: remove it
|
note: the lint level is defined here
--> $DIR/remove-extern-crate.rs:7:9
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LL | #![warn(rust_2018_idioms)]
| ^^^^^^^^^^^^^^^^
= note: `#[warn(unused_extern_crates)]` implied by `#[warn(rust_2018_idioms)]`
warning: `extern crate` is not idiomatic in the new edition
--> $DIR/remove-extern-crate.rs:32:5
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LL | extern crate core;
| ^^^^^^^^^^^^^^^^^^ help: convert it to a `use`
warning: 2 warnings emitted
|
