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23 lines
511 B
Rust
23 lines
511 B
Rust
// revisions: current negative
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#![feature(specialization)]
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#![cfg_attr(negative, feature(with_negative_coherence))]
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#![allow(incomplete_features)]
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trait X {}
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trait Y: X {}
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trait Z {
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type Assoc: Y;
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}
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struct A<T>(T);
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impl<T> Y for T where T: X {}
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impl<T: X> Z for A<T> {
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type Assoc = T;
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}
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// this impl is invalid, but causes an ICE anyway
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impl<T> From<<A<T> as Z>::Assoc> for T {}
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//~^ ERROR type parameter `T` must be used as the type parameter for some local type (e.g., `MyStruct<T>`)
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fn main() {}
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