Ban references to Self in trait object substs for projection predicates too.
#100500
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| // Like for trait refs, verify that `dummy_self` did not leak inside default type | ||
| // parameters. | ||
| let references_self = b.projection_ty.substs.iter().skip(1).any(|arg| { | ||
| if let ty::GenericArgKind::Type(ty) = arg.unpack() { |
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this feels incorrect for const generics. What happens if you have a generic constant referencing self? (using feature(generic_const_exprs))
a generic constant not using self would be even worse 😅 because it still has Self in its generic arguments even if unused.
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were there any problems with using arg.walk instead of ty.walk. Also, the generic arg itself should get returned as the first item of walk, so the explicit ty == dummy_self check shouldn't be necessary
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Do you have a test in mind for this?
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use feature(generic_const_exprs) and have a Trait<{ N + 1 } in it, or even Trait<{ 1 + 2 }>.
can look into making a full example if you want, am done for today 😅
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@bors r+ |
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…lcnr Ban references to `Self` in trait object substs for projection predicates too. Fixes rust-lang#100484 Fixes rust-lang#100485 r? `@lcnr`
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…lcnr Ban references to `Self` in trait object substs for projection predicates too. Fixes rust-lang#100484 Fixes rust-lang#100485 r? ``@lcnr``
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…lcnr Ban references to `Self` in trait object substs for projection predicates too. Fixes rust-lang#100484 Fixes rust-lang#100485 r? ```@lcnr```
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…iaskrgr Rollup of 9 pull requests Successful merges: - rust-lang#97963 (net listen backlog set to negative on Linux.) - rust-lang#99935 (Reenable disabled early syntax gates as future-incompatibility lints) - rust-lang#100129 (add miri-test-libstd support to libstd) - rust-lang#100500 (Ban references to `Self` in trait object substs for projection predicates too.) - rust-lang#100636 (Revert "Revert "Allow dynamic linking for iOS/tvOS targets."") - rust-lang#100718 ([rustdoc] Fix item info display) - rust-lang#100769 (Suggest adding a reference to a trait assoc item) - rust-lang#100777 (elaborate how revisions work with FileCheck stuff in src/test/codegen) - rust-lang#100796 (Refactor: remove unnecessary string searchings) Failed merges: r? `@ghost` `@rustbot` modify labels: rollup
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Fixes #100484
Fixes #100485
r? @lcnr