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15 lines
443 B
Rust
15 lines
443 B
Rust
// revisions: old next
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//[next] compile-flags: -Ztrait-solver=next
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// Tests that we consider `Box<U>: !Sugar` to be ambiguous, even
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// though we see no impl of `Sugar` for `Box`. Therefore, an overlap
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// error is reported for the following pair of impls (#23516).
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pub trait Sugar { fn dummy(&self) { } }
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pub trait Sweet { fn dummy(&self) { } }
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impl<T:Sugar> Sweet for T { }
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impl<U:Sugar> Sweet for Box<U> { }
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//~^ ERROR E0119
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fn main() { }
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