rust/tests/ui/coherence/coherence-overlap-issue-23516-inherent.rs
2023-01-11 09:32:08 +00:00

14 lines
367 B
Rust

// Tests that we consider `Box<U>: !Sugar` to be ambiguous, even
// though we see no impl of `Sugar` for `Box`. Therefore, an overlap
// error is reported for the following pair of impls (#23516).
pub trait Sugar {}
struct Cake<X>(X);
impl<T:Sugar> Cake<T> { fn dummy(&self) { } }
//~^ ERROR E0592
impl<U:Sugar> Cake<Box<U>> { fn dummy(&self) { } }
fn main() { }