error[E0308]: mismatched types
  --> $DIR/numeric-cast-2.rs:15:18
   |
LL |     let x: u16 = foo();
   |                  ^^^^^ expected u16, found i32

error[E0308]: mismatched types
  --> $DIR/numeric-cast-2.rs:17:18
   |
LL |     let y: i64 = x + x;
   |                  ^^^^^ expected i64, found u16

error[E0308]: mismatched types
  --> $DIR/numeric-cast-2.rs:19:18
   |
LL |     let z: i32 = x + x;
   |                  ^^^^^ expected i32, found u16

error: aborting due to 3 previous errors

If you want more information on this error, try using "rustc --explain E0308"