error[E0605]: non-primitive cast: `u8` as `std::vec::Vec` --> $DIR/E0605.rs:13:5 | LL | x as Vec; //~ ERROR E0605 | ^^^^^^^^^^^^ | = note: an `as` expression can only be used to convert between primitive types. Consider using the `From` trait error[E0605]: non-primitive cast: `*const u8` as `&u8` --> $DIR/E0605.rs:16:5 | LL | v as &u8; //~ ERROR E0605 | ^^^^^^^^ | = note: an `as` expression can only be used to convert between primitive types. Consider using the `From` trait error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0605`.