Outdated information in "unit-type-parameters" chapter?

[Forsworns]

These posts are really interesting and helpful. But when I try to run the following snippet in playground, it seems outdated and reports and error:

thread 'main' panicked at src/main.rs:18:5:
assertion left == right failed
left: 8
right: 0

case-studies/unit-type-parameters/README.md

Lines 328 to 348 in 4c3517a

	```rust
	mod phantom {
	pub use self::MyPhantomData::*;
	pub enum MyPhantomData<T: ?Sized> {
	MyPhantomData,
	#[allow(dead_code)]
	#[doc(hidden)]
	Marker(Void, [*const T; 0]),
	}
	pub enum Void {}
	}
	use phantom::MyPhantomData;
	fn main() {
	assert_eq!(std::mem::size_of::<MyPhantomData<usize>>(), 0);
	}
	```

I checked the implementation of https://github.com/dtolnay/ghost but did not find the difference.

[dtolnay]

Yeah the layout algorithm changed in Rust 1.74 due to rust-lang/rust#115277. Thanks for reporting.