error[E0308]: mismatched types --> $DIR/tutorial-suffix-inference-test.rs:19:18 | LL | identity_u16(x); | ^ expected u16, found u8 help: you can cast an `u8` to `u16`, which will zero-extend the source value | LL | identity_u16(x.into()); | ^^^^^^^^ error[E0308]: mismatched types --> $DIR/tutorial-suffix-inference-test.rs:22:18 | LL | identity_u16(y); | ^ expected u16, found i32 error[E0308]: mismatched types --> $DIR/tutorial-suffix-inference-test.rs:31:18 | LL | identity_u16(a); | ^ expected u16, found isize error: aborting due to 3 previous errors For more information about this error, try `rustc --explain E0308`.