rust/tests/ui/const-generics/backcompat/unevaluated-consts.rs

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// check-pass
// If we allow the parent generics here without using lazy normalization
// this results in a cycle error.
struct Foo<T, U>(T, U);
impl<T> From<[u8; 1 + 1]> for Foo<T, [u8; 1 + 1]> {
fn from(value: [u8; 1 + 1]) -> Foo<T, [u8; 1 + 1]> {
todo!();
}
}
fn break_me<T>()
where
[u8; 1 + 1]: From<[u8; 1 + 1]>
{}
fn main() {}