error[E0004]: non-exhaustive patterns: `_` not covered --> $DIR/feature-gate-precise_pointer_size_matching.rs:2:11 | LL | match 0usize { | ^^^^^^ pattern `_` not covered | = help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms = note: the matched value is of type `usize` = note: `usize` does not have a fixed maximum value, so a wildcard `_` is necessary to match exhaustively = help: add `#![feature(precise_pointer_size_matching)]` to the crate attributes to enable precise `usize` matching error[E0004]: non-exhaustive patterns: `_` not covered --> $DIR/feature-gate-precise_pointer_size_matching.rs:10:11 | LL | match 0isize { | ^^^^^^ pattern `_` not covered | = help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms = note: the matched value is of type `isize` = note: `isize` does not have a fixed maximum value, so a wildcard `_` is necessary to match exhaustively = help: add `#![feature(precise_pointer_size_matching)]` to the crate attributes to enable precise `isize` matching error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0004`.