21 lines
695 B
Rust
21 lines
695 B
Rust
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// compile-flags: -Ztrait-solver=next
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// ignore-test
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trait Trait {
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type Gat<'lt>;
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}
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impl Trait for u8 {
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type Gat<'lt> = u8;
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}
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fn test<T: Trait, F: FnOnce(<T as Trait>::Gat<'_>) -> S + ?Sized, S>() {}
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fn main() {
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// Proving `dyn FnOnce: FnOnce` requires making sure that all of the supertraits
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// of the trait and associated type bounds hold. We check this in
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// `predicates_for_object_candidate`, and eagerly replace projections using equality
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// which may generalize a type and emit a nested AliasRelate goal. Make sure that
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// we don't ICE in that case, and bubble that goal up to the caller.
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test::<u8, dyn FnOnce(<u8 as Trait>::Gat<'_>) + 'static, _>();
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}
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