warning: unreachable statement
  --> $DIR/never-assign-dead-code.rs:10:5
   |
LL |     let x: ! = panic!("aah");
   |                ------------- any code following this expression is unreachable
LL |     drop(x);
   |     ^^^^^^^^ unreachable statement
   |
note: the lint level is defined here
  --> $DIR/never-assign-dead-code.rs:6:9
   |
LL | #![warn(unused)]
   |         ^^^^^^
   = note: `#[warn(unreachable_code)]` implied by `#[warn(unused)]`

warning: unreachable call
  --> $DIR/never-assign-dead-code.rs:10:5
   |
LL |     drop(x);
   |     ^^^^ - any code following this expression is unreachable
   |     |
   |     unreachable call

warning: unused variable: `x`
  --> $DIR/never-assign-dead-code.rs:9:9
   |
LL |     let x: ! = panic!("aah");
   |         ^ help: if this is intentional, prefix it with an underscore: `_x`
   |
   = note: `#[warn(unused_variables)]` implied by `#[warn(unused)]`

warning: 3 warnings emitted