src/test/ui/editions/edition-extern-crate-allowed.stderr

   1 warning: unused extern crate
   2   --> $DIR/edition-extern-crate-allowed.rs:7:1
   3    |
   4 LL | extern crate edition_extern_crate_allowed;
   5    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove it
   6    |
   7 note: the lint level is defined here
   8   --> $DIR/edition-extern-crate-allowed.rs:5:9
   9    |
  10 LL | #![warn(rust_2018_idioms)]
  11    |         ^^^^^^^^^^^^^^^^
  12    = note: `#[warn(unused_extern_crates)]` implied by `#[warn(rust_2018_idioms)]`
  13
  14 warning: 1 warning emitted
  15