error[E0005]: refutable pattern in local binding --> $DIR/uninhabited-irrefutable.rs:27:9 | LL | let Foo::D(_y, _z) = x; | ^^^^^^^^^^^^^^ pattern `Foo::A(_)` not covered | = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html note: `Foo` defined here --> $DIR/uninhabited-irrefutable.rs:18:6 | LL | enum Foo { | ^^^ LL | A(foo::SecretlyEmpty), | - not covered = note: the matched value is of type `Foo` help: you might want to use `let else` to handle the variant that isn't matched | LL | let Foo::D(_y, _z) = x else { todo!() }; | ++++++++++++++++ error: aborting due to previous error For more information about this error, try `rustc --explain E0005`.