1 error[E0606]: cannot cast `usize` to a pointer that is wide
2 --> $DIR/cast-macro-lhs.rs:8:23
4 LL | let x = foo!() as *const [u8];
5 | ------ ^^^^^^^^^^^ creating a `*const [u8]` requires both an address and a length
7 | consider casting this expression to `*const ()`, then using `core::ptr::from_raw_parts`
9 error: aborting due to previous error
11 For more information about this error, try `rustc --explain E0606`.