error[E0381]: used binding `x` is possibly-uninitialized --> $DIR/borrowck-if-no-else.rs:5:9 | LL | let x: isize; if 1 > 2 { x = 10; } | - ----- - an `else` arm might be missing here, initializing `x` | | | | | if this `if` condition is `false`, `x` is not initialized | binding declared here but left uninitialized 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`.