mirror of https://github.com/rust-lang/rust
17 lines
431 B
Rust
17 lines
431 B
Rust
//@ revisions: old next
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//@[next] compile-flags: -Znext-solver
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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 {}
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struct Cake<X>(X);
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impl<T:Sugar> Cake<T> { fn dummy(&self) { } }
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//~^ ERROR E0592
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impl<U:Sugar> Cake<Box<U>> { fn dummy(&self) { } }
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fn main() { }
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