<layout-error> on u32 bitflags struct

[edwloef]

rust-analyzer version:
rust-analyzer 1.85.0 (4d91de4 2025-02-17)

rustc version:
rustc 1.85.0 (4d91de4e4 2025-02-17)

editor or extension:
occurs in both Zed and Flow Control

relevant settings:
none

repository link (if public, optional):
https://github.com/prokopyl/clack

code snippet to reproduce:
https://github.com/prokopyl/clack/blob/5deaa1be9b5af7078d75cbe54abefee12ed40f63/extensions/src/note_ports.rs#L24-L33

bitflags! {
    #[repr(C)]
    #[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
    pub struct NoteDialects: u32 {
        const CLAP = CLAP_NOTE_DIALECT_CLAP;
        const MIDI = CLAP_NOTE_DIALECT_MIDI;
        const MIDI_MPE = CLAP_NOTE_DIALECT_MIDI_MPE;
        const MIDI2 = CLAP_NOTE_DIALECT_MIDI2;
    }
}

[lnicola]

Minimized:

pub trait PublicFlags {
    type Internal;
}

pub struct NoteDialects(<NoteDialects as PublicFlags>::Internal);

impl NoteDialects {
    pub const CLAP: Self = Self(InternalBitFlags);
}

pub struct InternalBitFlags;

impl PublicFlags for NoteDialects {
    type Internal = InternalBitFlags;
}