error: unused extern crate --> $DIR/unnecessary-extern-crate.rs:6:1 | LL | extern crate core; | ^^^^^^^^^^^^^^^^^^ help: remove it | note: the lint level is defined here --> $DIR/unnecessary-extern-crate.rs:3:9 | LL | #![deny(unused_extern_crates)] | ^^^^^^^^^^^^^^^^^^^^ error: unused extern crate --> $DIR/unnecessary-extern-crate.rs:9:1 | LL | extern crate core as x; | ^^^^^^^^^^^^^^^^^^^^^^^ help: remove it error: unused extern crate --> $DIR/unnecessary-extern-crate.rs:31:5 | LL | extern crate core; | ^^^^^^^^^^^^^^^^^^ help: remove it error: unused extern crate --> $DIR/unnecessary-extern-crate.rs:35:5 | LL | extern crate core as x; | ^^^^^^^^^^^^^^^^^^^^^^^ help: remove it error: unused extern crate --> $DIR/unnecessary-extern-crate.rs:44:9 | LL | extern crate core; | ^^^^^^^^^^^^^^^^^^ help: remove it error: unused extern crate --> $DIR/unnecessary-extern-crate.rs:48:9 | LL | extern crate core as x; | ^^^^^^^^^^^^^^^^^^^^^^^ help: remove it error: aborting due to 6 previous errors