src/test/ui/rust-2018/remove-extern-crate.stderr

   1 warning: unused extern crate
   2   --> $DIR/remove-extern-crate.rs:9:1
   3    |
   4 LL | extern crate core;
   5    | ^^^^^^^^^^^^^^^^^^ help: remove it
   6    |
   7 note: lint level defined here
   8   --> $DIR/remove-extern-crate.rs:7:9
   9    |
  10 LL | #![warn(rust_2018_idioms)]
  11    |         ^^^^^^^^^^^^^^^^
  12    = note: `#[warn(unused_extern_crates)]` implied by `#[warn(rust_2018_idioms)]`
  13
  14 warning: `extern crate` is not idiomatic in the new edition
  15   --> $DIR/remove-extern-crate.rs:32:5
  16    |
  17 LL |     extern crate core;
  18    |     ^^^^^^^^^^^^^^^^^^ help: convert it to a `use`
  19