Use ObligationCtxt in custom type ops
#111741
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r? @TaKO8Ki (rustbot has picked a reviewer for you, use r? to override) |
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r? @lcnr feel free to reassign (maybe to oli) |
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May 24, 2023
| // delay more bugs than accidentally not delay a bug at all. | ||
| self.type_checker.tcx().sess.delay_span_bug( | ||
| self.locations.span(self.type_checker.body), | ||
| format!("errors selecting obligation during MIR typeck"), |
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| format!("errors selecting obligation during MIR typeck"), | |
| "errors selecting obligation during MIR typeck", |
when can we hit that case, given that we previously used unwrap here?
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Happens because if we hit an error while processing the region obligations, we return Err(NoSolution) instead of just Ok. Shouldn't matter anyways because we delay a bug both here and within scrape, but it's probably better to migrate to returning ErrorGuaranteed like you said below. I'll do it in a quick follow-up to avoid having re-review 😅
compiler/rustc_trait_selection/src/traits/query/type_op/custom.rs
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| infcx.tcx.sess.delay_span_bug( | ||
| DUMMY_SP, | ||
| format!("errors selecting obligation during MIR typeck: {:?}", errors), | ||
| ); |
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I feel like we may want to move that delay span bug out of the commit_if_ok and change scrape_region_constraints to return ErrorGuaranteed, think that may be more involved though so it doesn't have to be in this PR
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@bors r=lcnr |
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…earth Rollup of 5 pull requests Successful merges: - rust-lang#111741 (Use `ObligationCtxt` in custom type ops) - rust-lang#111840 (Expose more information in `get_body_with_borrowck_facts`) - rust-lang#111876 (Roll compiler_builtins to 0.1.92) - rust-lang#111912 (Use `Option::is_some_and` and `Result::is_ok_and` in the compiler ) - rust-lang#111915 (libtest: Improve error when missing `-Zunstable-options`) r? `@ghost` `@rustbot` modify labels: rollup
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…r, r=lcnr Use `ErrorGuaranteed` more in MIR type ops Delay bugs more eagerly and pass them through type op infra instead of delaying them at all the usage-sites. Follow up to: rust-lang#111741 (comment) r? `@lcnr`
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… r=lcnr Use `ErrorGuaranteed` more in MIR type ops Delay bugs more eagerly and pass them through type op infra instead of delaying them at all the usage-sites. Follow up to: rust-lang#111741 (comment) r? `@lcnr`
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Use `ErrorGuaranteed` more in MIR type ops Delay bugs more eagerly and pass them through type op infra instead of delaying them at all the usage-sites. Follow up to: rust-lang/rust#111741 (comment) r? `@lcnr`
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We already make one when evaluating the
CustomTypeOp, so it's simpler to just pass it to the user. Removes a redundantObligationCtxt::new_in_snapshotusage and simplifies some other code.This makes several refactorings related to opaque types in the new solver simpler, but those are not included in this PR.