Do not report cycle error when inferring return type for suggestion #100389
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…tion-cycle, r=cjgillot Do not report cycle error when inferring return type for suggestion The UI test is a good example of a case where this happens. The cycle is due to needing the value of the return type `-> _` to compute the variances of items in the crate, but then needing the variances of the items in the crate to do typechecking to infer what `-> _`'s real type is. Since we're already gonna emit an error in astconv, just delay the cycle bug as an error.
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…iaskrgr Rollup of 15 pull requests Successful merges: - rust-lang#99474 (Rustdoc json tests: New `@hasexact` test command) - rust-lang#99972 (interpret: only consider 1-ZST when searching for receiver) - rust-lang#100018 (Clean up `LitKind`) - rust-lang#100379 (triagebot: add translation-related mention groups) - rust-lang#100389 (Do not report cycle error when inferring return type for suggestion) - rust-lang#100489 (`is_knowable` use `Result` instead of `Option`) - rust-lang#100532 (unwind: don't build dependency when building for Miri) - rust-lang#100608 (needless separation of impl blocks) - rust-lang#100621 (Pass +atomics-32 feature for {arm,thumb}v4t-none-eabi) - rust-lang#100646 (Migrate emoji identifier diagnostics to `SessionDiagnostic` in rustc_interface) - rust-lang#100652 (Remove deferred sized checks (make them eager)) - rust-lang#100655 (Update books) - rust-lang#100656 (Update cargo) - rust-lang#100660 (Fixed a few documentation errors) - rust-lang#100661 (Fixed a few documentation errors) Failed merges: r? `@ghost` `@rustbot` modify labels: rollup
This was referenced Dec 1, 2022
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The UI test is a good example of a case where this happens. The cycle is due to needing the value of the return type
-> _to compute the variances of items in the crate, but then needing the variances of the items in the crate to do typechecking to infer what-> _'s real type is.Since we're already gonna emit an error in astconv, just delay the cycle bug as an error.