error[E0381]: used binding `x` isn't initialized --> $DIR/borrowck-storage-dead.rs:16:17 | LL | let x: i32; | - binding declared here but left uninitialized LL | let _ = x + 1; | ^ `x` used here but it isn't initialized | help: consider assigning a value | LL | let x: i32 = 0; | +++ error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0381`.