error: `#[cfg_attr]` does not expand to any attributes --> $DIR/cfg-attr-empty-is-unused.rs:7:1 | LL | #[cfg_attr(FALSE,)] | ^^^^^^^^^^^^^^^^^^^ | note: the lint level is defined here --> $DIR/cfg-attr-empty-is-unused.rs:5:9 | LL | #![deny(unused)] | ^^^^^^ = note: `#[deny(unused_attributes)]` implied by `#[deny(unused)]` error: `#[cfg_attr]` does not expand to any attributes --> $DIR/cfg-attr-empty-is-unused.rs:10:1 | LL | #[cfg_attr(TRUE,)] | ^^^^^^^^^^^^^^^^^^ error: aborting due to 2 previous errors