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Rollup of 9 pull requests #114294

Merged
merged 13 commits into from
Jul 31, 2023
Merged

Rollup of 9 pull requests #114294

merged 13 commits into from
Jul 31, 2023

Commits on Jul 28, 2023

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  2. fix comment

    lcnr committed Jul 28, 2023
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Commits on Jul 30, 2023

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Commits on Jul 31, 2023

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  3. Rollup merge of rust-lang#114169 - lcnr:unsize, r=compiler-errors

    refactor builtin unsize handling, extend comments
    
    r? `@compiler-errors`
    matthiaskrgr authored Jul 31, 2023
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  4. Rollup merge of rust-lang#114228 - fmease:wf-lazy-ty-aliases, r=oli-obk

    Check lazy type aliases for well-formedness
    
    Previously we didn't check if `T: Mul` holds given lazy `type Alias<T> = <T as Mul>::Output;`.
    Now we do. It only makes sense.
    
    `@rustbot` label F-lazy_type_alias
    
    r? `@oli-obk`
    matthiaskrgr authored Jul 31, 2023
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  5. Rollup merge of rust-lang#114267 - compiler-errors:rpitit-opaque-boun…

    …ds, r=spastorino
    
    Map RPITIT's opaque type bounds back from projections to opaques
    
    An RPITIT in a program's AST is eventually translated into both a projection GAT and an opaque. The opaque is used for default trait methods, like:
    
    ```
    trait Foo {
      fn bar() -> impl Sized { 0i32 }
    }
    ```
    
    The item bounds for both the projection and opaque are identical, and both have a *projection* self ty. This is mostly okay, since we can normalize this projection within the default trait method body to the opaque, but it does two things:
    1. it leads to bugs in places where we don't normalize item bounds, like `deduce_future_output_from_obligations`
    2. it leads to extra match arms that are both suspicious looking and also easy to miss
    
    This PR maps the opaque type bounds of the RPITIT's *opaque* back to the opaque's self type to avoid this quirk. Then we can fix the UI test for rust-lang#108304 (1.) and also remove a bunch of match arms (2.).
    
    Fixes rust-lang#108304
    
    r? `@spastorino`
    matthiaskrgr authored Jul 31, 2023
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  6. Rollup merge of rust-lang#114269 - GuillaumeGomez:migrate-gui-test-co…

    …lor-24, r=notriddle
    
    Migrate GUI colors test to original CSS color format
    
    Follow-up of rust-lang#111459.
    
    r? `@notriddle`
    matthiaskrgr authored Jul 31, 2023
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  7. Rollup merge of rust-lang#114286 - nbdd0121:upcast, r=compiler-errors

    Add missing feature gate in multiple_supertrait_upcastable doc
    
    Fix rust-lang#112424
    matthiaskrgr authored Jul 31, 2023
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