31 lines
690 B
Rust
31 lines
690 B
Rust
//@ check-pass
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// Regression test for #128887.
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#![allow(unconditional_recursion)]
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trait Mappable<T> {
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type Output;
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}
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trait Bound<T> {}
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// Deleting this impl made it compile on beta
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impl<T> Bound<T> for T {}
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trait Generic<M> {}
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// Deleting the `: Mappable<T>` already made it error on stable.
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struct IndexWithIter<I, M: Mappable<T>, T>(I, M, T);
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impl<I, M, T> IndexWithIter<I, M, T>
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where
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<M as Mappable<T>>::Output: Bound<T>,
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// Flipping these where bounds causes this to succeed, even when removing
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// the where-clause on the struct definition.
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M: Mappable<T>,
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I: Generic<M>,
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{
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fn new(x: I) {
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IndexWithIter::<_, _, _>::new(x);
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}
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}
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fn main() {}
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