fix coherence error for very large tuples™ #132001
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| // causing a coherence error in diesel, see #131969. We still bail with verflow | ||
| // when later returning from the parent AliasRelate goal. | ||
| if !self.is_normalizes_to_goal { | ||
| let num_non_region_vars = canonical.variables.iter().filter(|c| !c.is_region()).count(); |
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| let num_non_region_vars = canonical.variables.iter().filter(|c| !c.is_region()).count(); | |
| let num_non_region_vars = canonical.variables.iter().filter(|c| !c.is_region() && !c.is_existential()).count(); |
|
@bors r=compiler-errors rollup |
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Noratrieb
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Oct 21, 2024
| // | ||
| // We don't do so for `NormalizesTo` goals as we erased the expected term and | ||
| // bailing with overflow here would prevent us from detecting a type-mismatch, | ||
| // causing a coherence error in diesel, see #131969. We still bail with verflow |
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| // causing a coherence error in diesel, see #131969. We still bail with verflow | |
| // causing a coherence error in diesel, see #131969. We still bail with overflow |
(i won't r-, you can if you want to or not)
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verflow is actually a type-system specific concept :clueless:
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ah i see, it describes the way crates of different versions flow through the type system
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…iaskrgr Rollup of 7 pull requests Successful merges: - rust-lang#130350 (stabilize Strict Provenance and Exposed Provenance APIs) - rust-lang#131737 (linkchecker: add a reminder on broken links to add new/renamed pages to `SUMMARY.md` for mdBooks) - rust-lang#131991 (test: Add test for trait in FQS cast, issue rust-lang#98565) - rust-lang#131997 (Make `rustc_abi` compile on stable again) - rust-lang#131999 (Improve test coverage for `unit_bindings` lint) - rust-lang#132001 (fix coherence error for very large tuples™) - rust-lang#132003 (update ABI compatibility docs for new option-like rules) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of rust-lang#132001 - lcnr:stabilize-coherence-again, r=compiler-errors fix coherence error for very large tuples™ see https://rust-lang.zulipchat.com/#narrow/channel/364551-t-types.2Ftrait-system-refactor/topic/diesel.20error for an in-depth explanation of this issue. We once again specialize `NormalizesTo` goals to avoid the impact of erasing their expected term. fixes rust-lang#131969 r? `@compiler-errors`
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see https://rust-lang.zulipchat.com/#narrow/channel/364551-t-types.2Ftrait-system-refactor/topic/diesel.20error for an in-depth explanation of this issue. We once again specialize
NormalizesTogoals to avoid the impact of erasing their expected term.fixes #131969
r? @compiler-errors