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@oli-obk oli-obk commented Jan 17, 2023

fixes #104817

r? @lcnr

Specialization can prefer an impl for an opaque type over a blanket impls that also matches. If the blanket impl only applies if an auto-trait applies, we look at the hidden type of the opaque type to see if that implements the auto trait. The hidden type can be a closure or generator, and thus we will end up seeing these types in coherence and have to handle them properly.

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rustbot commented Jan 17, 2023

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @lcnr (or someone else) soon.

Please see the contribution instructions for more information.

@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 Jan 17, 2023
@oli-obk oli-obk force-pushed the tait_ice_closure_in_impl_header branch from f8cc286 to 42f1f54 Compare January 19, 2023 11:30
@oli-obk oli-obk changed the title Hide a delay_span_bug under specialization. Don't treat closures from other crates as local Jan 19, 2023
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oli-obk commented Jan 19, 2023

@bors r=lcnr

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bors commented Jan 19, 2023

📌 Commit 42f1f54 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 Jan 19, 2023
bors added a commit to rust-lang-ci/rust that referenced this pull request Jan 20, 2023
…iaskrgr

Rollup of 8 pull requests

Successful merges:

 - rust-lang#106783 (Recover labels written as identifiers)
 - rust-lang#106973 (Don't treat closures from other crates as local)
 - rust-lang#106979 (Document how to get the type of a default associated type)
 - rust-lang#107053 (signal update string representation for haiku.)
 - rust-lang#107058 (Recognise double-equals homoglyph)
 - rust-lang#107067 (Custom MIR: Support storage statements)
 - rust-lang#107076 (Added const-generic ui test case for issue rust-lang#106419)
 - rust-lang#107091 (Fix broken format strings in `infer.ftl`)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit 240cc81 into rust-lang:master Jan 20, 2023
@rustbot rustbot added this to the 1.68.0 milestone Jan 20, 2023
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ICE: ty_is_local invoked on closure or generator
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