error[E0384]: cannot assign twice to immutable variable `v` --> $DIR/liveness-assign-imm-local-in-loop.rs:6:9 | LL | let v: isize; | - help: consider making this binding mutable: `mut v` ... LL | v = 1; | ^^^^^ cannot assign twice to immutable variable error: aborting due to previous error For more information about this error, try `rustc --explain E0384`.