rust/tests/ui/issues/issue-48728.rs

// Regression test for #48728, an ICE that occurred computing
// coherence "help" information.

//@ check-pass
#[derive(Clone)]
struct Node<T: ?Sized>(Box<T>);

impl<T: Clone + ?Sized> Clone for Node<[T]> {
    fn clone(&self) -> Self {
        Node(Box::clone(&self.0))
    }
}

fn main() {}
do not propagate `Err` when determing causal info In intercrate mode, if we determine that a particular `T: Trait` is unknowable, we sometimes also go and get extra causal information. An errant `?` was causing us to propagate an error found in that process out as if `T: Trait` was not unknowable but rather not provable. This led to an ICE. 2018-04-06 00:15:23 +00:00			`// Regression test for #48728, an ICE that occurred computing`
			`// coherence "help" information.`

stabilize `-Znext-solver=coherence` 2024-03-01 11:33:42 +00:00			`//@ check-pass`
			`#[derive(Clone)]`
do not propagate `Err` when determing causal info In intercrate mode, if we determine that a particular `T: Trait` is unknowable, we sometimes also go and get extra causal information. An errant `?` was causing us to propagate an error found in that process out as if `T: Trait` was not unknowable but rather not provable. This led to an ICE. 2018-04-06 00:15:23 +00:00			`struct Node<T: ?Sized>(Box<T>);`

			`impl<T: Clone + ?Sized> Clone for Node<[T]> {`
			`fn clone(&self) -> Self {`
			`Node(Box::clone(&self.0))`
			`}`
			`}`

			`fn main() {}`