error[E0005]: refutable pattern in local binding --> $DIR/issue-106552.rs:2:9 | LL | let 5 = 6; | ^ patterns `i32::MIN..=4_i32` and `6_i32..=i32::MAX` 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: the matched value is of type `i32` help: you might want to use `if let` to ignore the variants that aren't matched | LL | if let 5 = 6 { todo!() }; | ++ +++++++++++ help: alternatively, you could prepend the pattern with an underscore to define a new named variable; identifiers cannot begin with digits | LL | let _5 = 6; | + error[E0005]: refutable pattern in local binding --> $DIR/issue-106552.rs:5:9 | LL | let x @ 5 = 6; | ^ patterns `i32::MIN..=4_i32` and `6_i32..=i32::MAX` 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: the matched value is of type `i32` help: you might want to use `let else` to handle the variants that aren't matched | LL | let x @ 5 = 6 else { todo!() }; | ++++++++++++++++ error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0005`.