Detect trait upcasting through struct tail unsizing in new solver select #114200
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Some changes occurred to the core trait solver cc @rust-lang/initiative-trait-system-refactor |
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@bors r+ rollup I think longterm we want to support unstable trait impls by adding a flag to the query result. For now this seems appropriate. |
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…iaskrgr Rollup of 9 pull requests Successful merges: - rust-lang#114111 (Improve test case for experimental API remove_matches) - rust-lang#114169 (refactor builtin unsize handling, extend comments) - rust-lang#114182 (clean up after 113312) - rust-lang#114193 (Update lexer emoji diagnostics to Unicode 15.0) - rust-lang#114200 (Detect trait upcasting through struct tail unsizing in new solver select) - rust-lang#114228 (Check lazy type aliases for well-formedness) - rust-lang#114267 (Map RPITIT's opaque type bounds back from projections to opaques) - rust-lang#114269 (Migrate GUI colors test to original CSS color format) - rust-lang#114286 (Add missing feature gate in multiple_supertrait_upcastable doc) r? `@ghost` `@rustbot` modify labels: rollup
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…iaskrgr Rollup of 7 pull requests Successful merges: - rust-lang#109318 (Make `Debug` representations of `[Lazy, Once]*[Cell, Lock]` consistent with `Mutex` and `RwLock`) - rust-lang#113701 (Re-export core::ffi::FromBytesUntilNulError in std::ffi) - rust-lang#113804 (Resolve correct archive version name in `opt-dist`) - rust-lang#114165 (Add missing rvalues to smir) - rust-lang#114182 (clean up after 113312) - rust-lang#114193 (Update lexer emoji diagnostics to Unicode 15.0) - rust-lang#114200 (Detect trait upcasting through struct tail unsizing in new solver select) r? `@ghost` `@rustbot` modify labels: rollup
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Oops, we were able to hide trait upcasting behind a parent unsize goal that evaluated to
Certainty::Yes. Let's do rematching forCertainty::Yesunsize goals withBuiltinImplSource::Miscsources (corresponding to all of the other unsize rules) to make sure we end up selecting any nested goals which may be satisfied viaBuiltinImplSource::TraitUpcastingor::TupleUnsizing.r? @lcnr