mirror of https://github.com/rust-lang/rust
29 lines
599 B
Rust
29 lines
599 B
Rust
// Both revisions should pass. `borrowck` revision is a bug!
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//
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//@ revisions: wfcheck borrowck
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//@ [wfcheck] check-pass
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//@ [borrowck] check-fail
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//@ [borrowck] known-bug: #106569
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struct Equal<'a, 'b>(&'a &'b (), &'b &'a ()); // implies 'a == 'b
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trait Trait {
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type Ty;
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}
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impl<'x> Trait for Equal<'x, 'x> {
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type Ty = ();
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}
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trait WfCheckTrait {}
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#[cfg(wfcheck)]
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impl<'a, 'b> WfCheckTrait for (<Equal<'a, 'b> as Trait>::Ty, Equal<'a, 'b>) {}
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#[cfg(borrowck)]
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fn test_borrowck<'a, 'b>(_: (<Equal<'a, 'b> as Trait>::Ty, Equal<'a, 'b>)) {
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let _ = None::<Equal<'a, 'b>>;
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}
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fn main() {}
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