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PR 138515, we insert a placeholder attribute so that checks for attributes can still know about the placement of `cfg` attributes. When we suggest removing items with `cfg_attr`s (fix Issue 56328) and make them verbose. We tweak the wording of the existing "unused `extern crate`" lint. ``` warning: unused extern crate --> $DIR/removing-extern-crate.rs:9:1 | LL | extern crate removing_extern_crate as foo; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unused | note: the lint level is defined here --> $DIR/removing-extern-crate.rs:6:9 | LL | #![warn(rust_2018_idioms)] | ^^^^^^^^^^^^^^^^ = note: `#[warn(unused_extern_crates)]` implied by `#[warn(rust_2018_idioms)]` help: remove the unused `extern crate` | LL - #[cfg_attr(test, macro_use)] LL - extern crate removing_extern_crate as foo; LL + | ```
20 lines
397 B
Plaintext
20 lines
397 B
Plaintext
error: unused extern crate
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--> $DIR/extern-crate-used.rs:18:1
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LL | extern crate core;
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| ^^^^^^^^^^^^^^^^^^ unused
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note: the lint level is defined here
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--> $DIR/extern-crate-used.rs:6:9
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LL | #![deny(unused_extern_crates)]
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| ^^^^^^^^^^^^^^^^^^^^
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help: remove the unused `extern crate`
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LL - extern crate core;
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LL +
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error: aborting due to 1 previous error
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