error[E0308]: mismatched types
  --> $DIR/numeric-cast-2.rs:15:18
   |
15 |     let x: u32 = foo();
   |                  ^^^^^ expected u32, found i32
help: you can cast an `i32` to `u32`, which will sign-extend the source value
   |
15 |     let x: u32 = foo() as u32;
   |                  ^^^^^^^^^^^^

error[E0308]: mismatched types
  --> $DIR/numeric-cast-2.rs:17:18
   |
17 |     let z: i32 = x + x;
   |                  ^^^^^ expected i32, found u32
help: you can cast an `u32` to `i32`, which will truncate the source value
   |
17 |     let z: i32 = (x + x) as i32;
   |                  ^^^^^^^^^^^^^^

error: aborting due to 2 previous errors