error[E0005]: refutable pattern in function argument: `(_, _)` not covered --> $DIR/refutable-pattern-errors.rs:3:9 | LL | fn func((1, (Some(1), 2..=3)): (isize, (Option, isize))) { } | ^^^^^^^^^^^^^^^^^^^^^ pattern `(_, _)` not covered error[E0005]: refutable pattern in local binding: `(std::i32::MIN..=0i32, _)` and `(2i32..=std::i32::MAX, _)` not covered --> $DIR/refutable-pattern-errors.rs:7:9 | LL | let (1, (Some(1), 2..=3)) = (1, (None, 2)); | ^^^^^^^^^^^^^^^^^^^^^ patterns `(std::i32::MIN..=0i32, _)` and `(2i32..=std::i32::MAX, _)` not covered error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0005`.