22 lines
648 B
Rust
22 lines
648 B
Rust
// revisions: current next
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//[next] compile-flags: -Znext-solver
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struct MyType;
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trait MyTrait<S> {}
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trait Mirror {
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type Assoc;
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}
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impl<T> Mirror for T {
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type Assoc = T;
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}
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impl<T: Copy, S: Iterator> MyTrait<S> for (T, S::Item) {}
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//~^ NOTE first implementation here
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impl<S: Iterator> MyTrait<S> for (Box<<(MyType,) as Mirror>::Assoc>, S::Item) {}
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//~^ ERROR conflicting implementations of trait `MyTrait<_>` for type `(Box<(MyType,)>,
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//~| NOTE conflicting implementation for `(Box<(MyType,)>,
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//~| NOTE upstream crates may add a new impl of trait `std::marker::Copy` for type `std::boxed::Box<(MyType,)>` in future versions
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fn main() {}
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