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Issues list

Incorrect expected type for associated type with specialization A-specialization Area: Trait impl specialization C-discussion Category: Discussion or questions that doesn't represent real issues.
#132804 opened Nov 9, 2024 by justinlovinger
7
Array and Vec's Clone specialization is maybe unsound with conditionally Copy types. A-specialization Area: Trait impl specialization C-bug Category: This is a bug. E-needs-investigation Call for partcipation: This issues needs some investigation to determine current status I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness P-medium Medium priority T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue.
#132442 opened Nov 1, 2024 by theemathas
17
Confusing error message when using min_specialization with dyn Trait A-diagnostics Area: Messages for errors, warnings, and lints A-specialization Area: Trait impl specialization F-min_specialization `#![feature(min_specialization)]` requires-nightly This issue requires a nightly compiler in some way. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#130102 opened Sep 8, 2024 by oskgo
2
[Specialization] Alternatve Minimal implementation: only allow whole-impl specialization, haskell style A-specialization Area: Trait impl specialization C-discussion Category: Discussion or questions that doesn't represent real issues. F-specialization `#![feature(specialization)]`
#125295 opened May 19, 2024 by lolbinarycat
5
Compiler hang with recursive trait requirement and default impl A-specialization Area: Trait impl specialization C-bug Category: This is a bug. F-specialization `#![feature(specialization)]` I-compiletime Issue: Problems and improvements with respect to compile times. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#117909 opened Nov 14, 2023 by jruderman
2
min_specialization on local types should take impls into account to determine whether a trait can be specialized on A-specialization Area: Trait impl specialization C-enhancement Category: An issue proposing an enhancement or a PR with one. requires-nightly This issue requires a nightly compiler in some way. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#113452 opened Jul 7, 2023 by the8472
Cow<'a, T> isn't specializable while FooCow<'a, T> is A-specialization Area: Trait impl specialization C-bug Category: This is a bug. F-specialization `#![feature(specialization)]` requires-incomplete-features This issue requires the use of incomplete features.
#106710 opened Jan 11, 2023 by ryoqun
1
Specialized Associated Type Cannot be Assigned to Value of Concrete Type (Despite type_name Working as Expected) A-specialization Area: Trait impl specialization C-bug Category: This is a bug. F-specialization `#![feature(specialization)]`
#106700 opened Jan 11, 2023 by NathanielB123
2
ICE: rustc_specialization_trait and circular associated type A-specialization Area: Trait impl specialization C-bug Category: This is a bug. F-rustc_attrs Internal rustc attributes gated on the `#[rustc_attrs]` feature gate. F-specialization `#![feature(specialization)]` glacier ICE tracked in rust-lang/glacier. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ requires-internal-features This issue requires the use of internal features. S-bug-has-test Status: This bug is tracked inside the repo by a `known-bug` test. S-has-mcve Status: A Minimal Complete and Verifiable Example has been found for this issue T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-types Relevant to the types team, which will review and decide on the PR/issue.
#102252 opened Sep 25, 2022 by ChaiTRex
2
Zero-length arrays are non-Copy. A-array Area: `[T; N]` A-specialization Area: Trait impl specialization A-trait-system Area: Trait system T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#94313 opened Feb 24, 2022 by JohnScience
9
Strange behavior when specializing over a generic trait parameter A-specialization Area: Trait impl specialization C-bug Category: This is a bug. F-specialization `#![feature(specialization)]` requires-nightly This issue requires a nightly compiler in some way. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#91973 opened Dec 15, 2021 by joergbrech
1
Cycle detected when computing whether impls specialize one another, across crate boundaries A-specialization Area: Trait impl specialization A-trait-system Area: Trait system C-bug Category: This is a bug. I-cycle Issue: A query cycle occurred while none was expected P-low Low priority regression-from-stable-to-stable Performance or correctness regression from one stable version to another. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#90817 opened Nov 12, 2021 by patrick-gu
7
Diagnostic forgets about transitive trait bounds when there are multiple candidate impls. A-diagnostics Area: Messages for errors, warnings, and lints A-specialization Area: Trait impl specialization A-trait-system Area: Trait system D-confusing Diagnostics: Confusing error or lint that should be reworked. D-terse Diagnostics: An error or lint that doesn't give enough information about the problem at hand. F-rustc_attrs Internal rustc attributes gated on the `#[rustc_attrs]` feature gate. F-specialization `#![feature(specialization)]` requires-nightly This issue requires a nightly compiler in some way. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#90665 opened Nov 7, 2021 by BGR360
8
Specialization on associated type A-diagnostics Area: Messages for errors, warnings, and lints A-specialization Area: Trait impl specialization C-bug Category: This is a bug. D-confusing Diagnostics: Confusing error or lint that should be reworked. F-specialization `#![feature(specialization)]` T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#85228 opened May 12, 2021 by vandenheuvel
3
Conflicing implementation through specialized default implementation A-specialization Area: Trait impl specialization C-bug Category: This is a bug. F-specialization `#![feature(specialization)]`
#81376 opened Jan 25, 2021 by vandenheuvel
1
Error in specialization type checking when using trait aliases A-specialization Area: Trait impl specialization C-bug Category: This is a bug. F-specialization `#![feature(specialization)]` F-trait_alias `#![feature(trait_alias)]` requires-nightly This issue requires a nightly compiler in some way.
#74809 opened Jul 27, 2020 by jsmith628
Internal compiler error: find_vtable_types_for_unsizing: invalid coercion A-specialization Area: Trait impl specialization C-bug Category: This is a bug. F-coerce_unsized The `CoerceUnsized` trait F-specialization `#![feature(specialization)]` glacier ICE tracked in rust-lang/glacier. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ requires-nightly This issue requires a nightly compiler in some way. S-bug-has-test Status: This bug is tracked inside the repo by a `known-bug` test. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#74451 opened Jul 17, 2020 by matthewjasper
1
SpecForElem for i16/u16 and other digits A-collections Area: `std::collection` A-specialization Area: Trait impl specialization C-enhancement Category: An issue proposing an enhancement or a PR with one. I-slow Issue: Problems and improvements with respect to performance of generated code. T-libs Relevant to the library team, which will review and decide on the PR/issue.
#73995 opened Jul 3, 2020 by pickfire
3
#[track_caller] should inherit through specialization ancestors, too? A-specialization Area: Trait impl specialization F-specialization `#![feature(specialization)]` F-track_caller `#![feature(track_caller)]` T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-lang Relevant to the language team, which will review and decide on the PR/issue.
#70293 opened Mar 23, 2020 by anp
2
Spurious 'conflicting implementations' error when specializing a type with a compilation error A-diagnostics Area: Messages for errors, warnings, and lints A-specialization Area: Trait impl specialization C-bug Category: This is a bug. D-verbose Diagnostics: Too much output caused by a single piece of incorrect code. E-needs-test Call for participation: An issue has been fixed and does not reproduce, but no test has been added. F-specialization `#![feature(specialization)]` T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#68830 opened Feb 4, 2020 by Aaron1011
1
2
specialization: default impl is used, ignoring the vtable of original value A-specialization Area: Trait impl specialization C-bug Category: This is a bug. F-specialization `#![feature(specialization)]` requires-nightly This issue requires a nightly compiler in some way. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#68564 opened Jan 27, 2020 by kdy1
2
Specialization should allow for delegation to default trait method implementation A-specialization Area: Trait impl specialization C-feature-request Category: A feature request, i.e: not implemented / a PR. F-associated_type_defaults `#![feature(associated_type_defaults)]` F-specialization `#![feature(specialization)]` T-lang Relevant to the language team, which will review and decide on the PR/issue.
#68309 opened Jan 17, 2020 by jazzfool
4
RcFromIter and ArcFromIter have unused specializations A-iterators Area: Iterators A-specialization Area: Trait impl specialization C-bug Category: This is a bug. T-libs-api Relevant to the library API team, which will review and decide on the PR/issue.
#67307 opened Dec 15, 2019 by qnighy
Specialized FnOnce impl compiles failed with a lengthy error message A-diagnostics Area: Messages for errors, warnings, and lints A-specialization Area: Trait impl specialization C-enhancement Category: An issue proposing an enhancement or a PR with one. F-specialization `#![feature(specialization)]` F-unboxed_closures `#![feature(unboxed_closures)]` requires-nightly This issue requires a nightly compiler in some way. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#58809 opened Feb 28, 2019 by mzji
2
Recursive call passes cargo check but fails with cargo build A-closures Area: Closures (`|…| { … }`) A-impl-trait Area: `impl Trait`. Universally / existentially quantified anonymous types with static dispatch. A-specialization Area: Trait impl specialization T-lang Relevant to the language team, which will review and decide on the PR/issue.
#56711 opened Dec 11, 2018 by ryym
5
ProTip! Updated in the last three days: updated:>2024-12-23.