error[E0381]: used binding `e` isn't initialized --> $DIR/issue-62107-match-arm-scopes.rs:3:11 | LL | let e: i32; | - binding declared here but left uninitialized LL | match e { | ^ `e` used here but it isn't initialized | help: consider assigning a value | LL | let e: i32 = 0; | +++ error: aborting due to previous error For more information about this error, try `rustc --explain E0381`.