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Shallowly match opaque key in storage #131599

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Oct 13, 2024
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Using a full eq on the key and the hidden type means that in cases where we first ambiguously register a ?t hidden type then constrain that ?t to be a type that doesn't actually satisfy its bounds, we end up with bogus entries in the opaque type storage. We should commit to the type in the storage if it's registered.

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 (-Znext-solver) labels Oct 12, 2024
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lcnr commented Oct 12, 2024

@bors r+ rollup

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bors commented Oct 12, 2024

📌 Commit 470e9fa 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 Oct 12, 2024
bors added a commit to rust-lang-ci/rust that referenced this pull request Oct 12, 2024
…iaskrgr

Rollup of 8 pull requests

Successful merges:

 - rust-lang#128784 (Check ABI target compatibility for function pointers)
 - rust-lang#130965 (make `Step` doc-comments more clear)
 - rust-lang#131239 (Don't assume traits used as type are trait objs in 2021 edition)
 - rust-lang#131277 (Handle `clippy` cases of `rustc::potential_query_instability` lint)
 - rust-lang#131503 (More clearly document Stdin::read_line)
 - rust-lang#131567 (Emit an error for unstable attributes that reference already stable features)
 - rust-lang#131599 (Shallowly match opaque key in storage)
 - rust-lang#131617 (remove const_cow_is_borrowed feature gate)

Failed merges:

 - rust-lang#131616 (merge const_ipv4 / const_ipv6 feature gate into 'ip' feature gate)

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit e1df397 into rust-lang:master Oct 13, 2024
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@rustbot rustbot added this to the 1.83.0 milestone Oct 13, 2024
rust-timer added a commit to rust-lang-ci/rust that referenced this pull request Oct 13, 2024
Rollup merge of rust-lang#131599 - compiler-errors:storage, r=lcnr

Shallowly match opaque key in storage

Using a full eq on the key *and* the hidden type means that in cases where we first ambiguously register a `?t` hidden type then constrain that `?t` to be a type that doesn't actually satisfy its bounds, we end up with bogus entries in the opaque type storage. We should commit to the type in the storage if it's registered.

r? lcnr
@compiler-errors compiler-errors deleted the storage branch October 13, 2024 02:07
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4 participants