Try to improve error messages involving aliases in the solver #131699
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Some changes occurred to the core trait solver cc @rust-lang/initiative-trait-system-refactor |
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compiler/rustc_next_trait_solver/src/solve/normalizes_to/mod.rs
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…projections, r=lcnr Try to improve error messages involving aliases in the solver 1. Treat aliases as rigid only if it may not be defined and it's well formed (i.e. for projections, its trait goal is satisfied). 2. Record goals that are related to alias normalization under a new `GoalKind`, so we can look into them in the `BestObligation` visitor. 3. Try to deduplicate errors due to self types of goals that are un-normalizable aliases. r? lcnr
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…iaskrgr Rollup of 8 pull requests Successful merges: - rust-lang#130822 (Add `from_ref` and `from_mut` constructors to `core::ptr::NonNull`.) - rust-lang#131381 (Implement edition 2024 match ergonomics restrictions) - rust-lang#131594 (rustdoc: Rename "object safe" to "dyn compatible") - rust-lang#131686 (Add fast-path when computing the default visibility) - rust-lang#131699 (Try to improve error messages involving aliases in the solver) - rust-lang#131757 (Ignore lint-non-snake-case-crate#proc_macro_ on targets without unwind) - rust-lang#131783 (Fix explicit_iter_loop in rustc_serialize) - rust-lang#131788 (Fix mismatched quotation mark) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of rust-lang#131699 - compiler-errors:better-errors-for-projections, r=lcnr Try to improve error messages involving aliases in the solver 1. Treat aliases as rigid only if it may not be defined and it's well formed (i.e. for projections, its trait goal is satisfied). 2. Record goals that are related to alias normalization under a new `GoalKind`, so we can look into them in the `BestObligation` visitor. 3. Try to deduplicate errors due to self types of goals that are un-normalizable aliases. r? lcnr
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GoalKind, so we can look into them in theBestObligationvisitor.r? lcnr