error[E0453]: allow(deprecated) incompatible with previous forbid --> $DIR/lint-forbid-attr.rs:3:9 | LL | #![forbid(deprecated)] | ---------- `forbid` level set here LL | LL | #[allow(deprecated)] | ^^^^^^^^^^ overruled by previous forbid error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0453`.