error[E0005]: refutable pattern in local binding: `Bar` and `Baz` not covered --> $DIR/issue-31561.rs:8:9 | LL | let Thing::Foo(y) = Thing::Foo(1); | ^^^^^^^^^^^^^ patterns `Bar` and `Baz` 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: `Thing` defined here --> $DIR/issue-31561.rs:3:5 | LL | enum Thing { | ----- LL | Foo(u8), LL | Bar, | ^^^ not covered LL | Baz | ^^^ not covered = note: the matched value is of type `Thing` help: you might want to use `if let` to ignore the variant that isn't matched | LL | if let Thing::Foo(y) = Thing::Foo(1) { /* */ } | error: aborting due to previous error For more information about this error, try `rustc --explain E0005`.