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No need to validate_alias_bound_self_from_param_env in assemble_alias_bound_candidates #120598

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merged 1 commit into from
Feb 22, 2024

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@compiler-errors compiler-errors commented Feb 3, 2024

We already fully normalize the self type before we reach assemble_alias_bound_candidates, so there's no reason to double check that a projection is truly rigid by checking param-env bounds.

I think this is also blocked on us making sure to always normalize opaques: #120549.

r? lcnr

@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. WG-trait-system-refactor The Rustc Trait System Refactor Initiative labels Feb 3, 2024
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rustbot commented Feb 3, 2024

Some changes occurred to the core trait solver

cc @rust-lang/initiative-trait-system-refactor

error: the type `<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter` is not well-formed
--> $DIR/issue-20605.rs:5:17
|
LL | for item in *things { *item = 0 }
| ^^^^^^^

error[E0277]: `<dyn Iterator<Item = &'a mut u8> as IntoIterator>::IntoIter` is not an iterator
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The only case where this matters is not-well-formed projections, which who cares if they're treated as rigid or not.

@lcnr lcnr added S-blocked Status: Marked as blocked ❌ on something else such as an RFC or other implementation work. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Feb 5, 2024
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I believe this is unblocked now

@rustbot ready

@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-blocked Status: Marked as blocked ❌ on something else such as an RFC or other implementation work. labels Feb 21, 2024
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lcnr commented Feb 22, 2024

@bors r+ rollup (next solver)

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bors commented Feb 22, 2024

📌 Commit 6dea155 has been approved by lcnr

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 Feb 22, 2024
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request Feb 22, 2024
…lcnr

No need to `validate_alias_bound_self_from_param_env` in `assemble_alias_bound_candidates`

We already fully normalize the self type before we reach `assemble_alias_bound_candidates`, so there's no reason to double check that a projection is truly rigid by checking param-env bounds.

I think this is also blocked on us making sure to always normalize opaques: rust-lang#120549.

r? lcnr
bors added a commit to rust-lang-ci/rust that referenced this pull request Feb 22, 2024
…iaskrgr

Rollup of 8 pull requests

Successful merges:

 - rust-lang#120598 (No need to `validate_alias_bound_self_from_param_env` in `assemble_alias_bound_candidates`)
 - rust-lang#121386 (test that we do not support higher-ranked regions in opaque type inference)
 - rust-lang#121393 (match lowering: Introduce a `TestCase` enum to replace most matching on `PatKind`)
 - rust-lang#121401 (Fix typo in serialized.rs)
 - rust-lang#121427 (Fix panic when compiling `Rocket`.)
 - rust-lang#121439 (Fix typo in metadata.rs doc comment)
 - rust-lang#121441 (`DefId`  to `LocalDefId`)
 - rust-lang#121452 (Add new maintainers to nto-qnx.md)

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit 702225e into rust-lang:master Feb 22, 2024
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@rustbot rustbot added this to the 1.78.0 milestone Feb 22, 2024
rust-timer added a commit to rust-lang-ci/rust that referenced this pull request Feb 22, 2024
Rollup merge of rust-lang#120598 - compiler-errors:no-rigid-check, r=lcnr

No need to `validate_alias_bound_self_from_param_env` in `assemble_alias_bound_candidates`

We already fully normalize the self type before we reach `assemble_alias_bound_candidates`, so there's no reason to double check that a projection is truly rigid by checking param-env bounds.

I think this is also blocked on us making sure to always normalize opaques: rust-lang#120549.

r? lcnr
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4 participants