error: value assigned to `x` is never read --> $DIR/liveness-dead.rs:9:13 | LL | let mut x: isize = 3; | ^ | = help: maybe it is overwritten before being read? note: the lint level is defined here --> $DIR/liveness-dead.rs:2:9 | LL | #![deny(unused_assignments)] | ^^^^^^^^^^^^^^^^^^ error: value assigned to `x` is never read --> $DIR/liveness-dead.rs:17:5 | LL | x = 4; | ^ | = help: maybe it is overwritten before being read? error: value passed to `x` is never read --> $DIR/liveness-dead.rs:20:11 | LL | fn f4(mut x: i32) { | ^ | = help: maybe it is overwritten before being read? error: value assigned to `x` is never read --> $DIR/liveness-dead.rs:27:5 | LL | x = 4; | ^ | = help: maybe it is overwritten before being read? error: aborting due to 4 previous errors