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use auxiliary_macro::hidden_repr;
use pin_project::pin_project;
#[pin_project]
#[hidden_repr(packed)] //~ ERROR may not be used on #[repr(packed)] types
struct S {
#[cfg(any())]
#[pin]
f: u32,
#[cfg(not(any()))]
#[pin]
f: u8,
}
fn main() {}