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John Kåre Alsaker
19 lines
729 B
Rust
19 lines
729 B
Rust
//~? ERROR cycle detected when computing layout of `core::option::Option<S>`
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//~? NOTE see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
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//~? NOTE ...which requires computing layout of `core::option::Option<<S as Mirror>::It>`...
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//~? NOTE ...which again requires computing layout of `core::option::Option<S>`, completing the cycle
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//~? NOTE cycle used when computing layout of `core::option::Option<<S as Mirror>::It>`
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trait Mirror {
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type It: ?Sized;
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}
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impl<T: ?Sized> Mirror for T {
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type It = Self;
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}
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struct S(Option<<S as Mirror>::It>);
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//~^ NOTE ...which requires computing layout of `S`...
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fn main() {
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let _s = S(None);
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}
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