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rust/tests/crashes/137287.rs

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Rust
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2025-03-07 23:17:25 +01:00
//@ known-bug: #137287
mod defining_scope {
use super::*;
pub type Alias<T> = impl Sized;
pub fn cast<T>(x: Container<Alias<T>, T>) -> Container<T, T> {
x
}
}
struct Container<T: Trait<U>, U> {
x: <T as Trait<U>>::Assoc,
}
trait Trait<T> {
type Assoc;
}
impl<T> Trait<T> for T {
type Assoc = Box<u32>;
}
impl<T> Trait<T> for defining_scope::Alias<T> {
type Assoc = usize;
}
fn main() {
let x: Box<u32> = defining_scope::cast::<()>(Container { x: 0 }).x;
}