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Don't ICE if we collect no RPITITs unless there are no unification errors #122172

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merged 1 commit into from
Mar 8, 2024

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Move an assertion in collect_return_position_impl_trait_in_trait_tys to after the ObligationCtxt::eq calls, so that we only assert and ICE if we have unification errors.

Fixes #121468

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rustbot commented Mar 8, 2024

r? @fmease

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@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Mar 8, 2024
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Makes sense, thanks! r=me with preexisting nit addressed.

Comment on lines 642 to 645
debug_assert_ne!(
collector.types.len(),
0,
"expect >1 RPITITs in call to `collect_return_position_impl_trait_in_trait_tys`"
);
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(preexisting) Minor nitpick: The message of the assertion isn't correct, it should either say >=1 or >0. Furthermore, I'd probably use debug_assert + !collector.types.is_empty().

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@bors r=fmease rollup

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bors commented Mar 8, 2024

📌 Commit 07bd05e has been approved by fmease

It is now in the queue for this repository.

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Mar 8, 2024
bors added a commit to rust-lang-ci/rust that referenced this pull request Mar 8, 2024
…iaskrgr

Rollup of 9 pull requests

Successful merges:

 - rust-lang#121201 (align_offset, align_to: no longer allow implementations to spuriously fail to align)
 - rust-lang#122076 (Tweak the way we protect in-place function arguments in interpreters)
 - rust-lang#122100 (Better comment for implicit captures in RPITIT)
 - rust-lang#122157 (Add the new description field to Target::to_json, and add descriptions for some MSVC targets)
 - rust-lang#122164 (Fix misaligned loads when loading UEFI arg pointers)
 - rust-lang#122171 (Add some new solver tests)
 - rust-lang#122172 (Don't ICE if we collect no RPITITs unless there are no unification errors)
 - rust-lang#122197 (inspect formatter: add braces)
 - rust-lang#122198 (Remove handling for previously dropped LLVM version)

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit 02b89d1 into rust-lang:master Mar 8, 2024
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@rustbot rustbot added this to the 1.78.0 milestone Mar 8, 2024
rust-timer added a commit to rust-lang-ci/rust that referenced this pull request Mar 8, 2024
Rollup merge of rust-lang#122172 - compiler-errors:rpitit-collect-ice, r=fmease

Don't ICE if we collect no RPITITs unless there are no unification errors

Move an assertion in `collect_return_position_impl_trait_in_trait_tys` to after the `ObligationCtxt::eq` calls, so that we only assert and ICE if we have unification errors.

Fixes rust-lang#121468
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ICE: expect >1 RPITITs in call to 'collect_return_position_impl_trait_in_trait_tys'
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