error[E0453]: allow(unused) incompatible with previous forbid --> $DIR/forbid-member-group.rs:6:9 | LL | #![forbid(unused_variables)] | ---------------- `forbid` level set here LL | LL | #[allow(unused)] | ^^^^^^ overruled by previous forbid error[E0453]: allow(unused) incompatible with previous forbid --> $DIR/forbid-member-group.rs:6:9 | LL | #![forbid(unused_variables)] | ---------------- `forbid` level set here LL | LL | #[allow(unused)] | ^^^^^^ overruled by previous forbid error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0453`.