error[E0381]: used binding `x` is possibly-uninitialized --> $DIR/borrowck-if-with-else.rs:10:9 | LL | let x: isize; | - binding declared here but left uninitialized LL | if 1 > 2 { | ----- if this condition is `true`, `x` is not initialized ... LL | foo(x); | ^ `x` used here but it is possibly-uninitialized error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0381`.