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Issues list

GAT type Assoc<T: ?Sized> implicitly requires Self to be 'static A-borrow-checker Area: The borrow checker A-diagnostics Area: Messages for errors, warnings, and lints A-lifetimes Area: Lifetimes / regions A-trait-objects Area: trait objects, vtable layout D-terse Diagnostics: An error or lint that doesn't give enough information about the problem at hand. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#131008 opened Sep 29, 2024 by Veetaha
4
Tracking issue for release notes of #126660: Allow dropping dyn Trait principal A-coercions Area: implicit and explicit `expr as Type` coercions A-trait-objects Area: trait objects, vtable layout relnotes Marks issues that should be documented in the release notes of the next release. relnotes-tracking-issue Marks issues tracking what text to put in release notes. T-lang Relevant to the language 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. WG-trait-system-refactor The Rustc Trait System Refactor Initiative
#130985 opened Sep 28, 2024 by rustbot
3 tasks
Unhelpful error message "ambiguous lifetime bound, explicit lifetime bound required" A-diagnostics Area: Messages for errors, warnings, and lints A-lifetimes Area: Lifetimes / regions A-trait-objects Area: trait objects, vtable layout D-terse Diagnostics: An error or lint that doesn't give enough information about the problem at hand. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#130952 opened Sep 27, 2024 by oberien
1
ICE: "error performing operation: fully_perform" on type inference for trait object with HRTB over GAT A-GATs Area: Generic associated types (GATs) A-higher-ranked Area: Higher-ranked things (e.g., lifetimes, types, trait bounds aka HRTBs) A-lifetimes Area: Lifetimes / regions A-trait-objects Area: trait objects, vtable layout A-traits Area: Trait system C-bug Category: This is a bug. fixed-by-next-solver Fixed by the next-generation trait solver, `-Znext-solver`. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#130797 opened Sep 24, 2024 by arvidfm
1
ICE: broken MIR: NoSolution on HRTB over GAT in trait object A-GATs Area: Generic associated types (GATs) A-higher-ranked Area: Higher-ranked things (e.g., lifetimes, types, trait bounds aka HRTBs) A-lifetimes Area: Lifetimes / regions A-trait-objects Area: trait objects, vtable layout A-traits Area: Trait system fixed-by-next-solver Fixed by the next-generation trait solver, `-Znext-solver`. S-bug-has-test Status: This bug is tracked inside the repo by a `known-bug` test.
#130524 opened Sep 18, 2024 by arvidfm
3
Permit trait object types where all (non-generic) associated constants are specified (via assoc item bindings) A-trait-objects Area: trait objects, vtable layout C-feature-request Category: A feature request, i.e: not implemented / a PR. F-associated_const_equality `#![feature(associated_const_equality)]` requires-nightly This issue requires a nightly compiler in some way. S-blocked Status: Marked as blocked ❌ on something else such as an RFC or other implementation work. 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.
#130300 opened Sep 13, 2024 by fmease
@fmease
RPITIT "captures lifetime that does not appear in bounds" A-diagnostics Area: Messages for errors, warnings, and lints A-impl-trait Area: `impl Trait`. Universally / existentially quantified anonymous types with static dispatch. A-trait-objects Area: trait objects, vtable layout A-traits Area: Trait system C-bug Category: This is a bug. 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.
#128752 opened Aug 6, 2024 by tmandry
8
RFC #1733 (Trait Aliases): use of lifetime parameter in trait alias not detected A-lifetimes Area: Lifetimes / regions A-trait-objects Area: trait objects, vtable layout C-bug Category: This is a bug. F-trait_alias `#![feature(trait_alias)]` 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.
#127725 opened Jul 14, 2024 by ilonachan
2
Incorrect Suggestion when Returning a Bare Trait from a Function A-diagnostics Area: Messages for errors, warnings, and lints A-trait-objects Area: trait objects, vtable layout D-incorrect Diagnostics: A diagnostic that is giving misleading or incorrect information. D-verbose Diagnostics: Too much output caused by a single piece of incorrect code. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#127691 opened Jul 13, 2024 by veera-sivarajan
2
Verbose Error When a Function Takes a Bare Trait as Parameter A-diagnostics Area: Messages for errors, warnings, and lints A-trait-objects Area: trait objects, vtable layout D-verbose Diagnostics: Too much output caused by a single piece of incorrect code. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#127690 opened Jul 13, 2024 by veera-sivarajan
1
Misleading Suggestion when Returning a Reference to a Bare Trait from a Function A-diagnostics Area: Messages for errors, warnings, and lints A-trait-objects Area: trait objects, vtable layout D-incorrect Diagnostics: A diagnostic that is giving misleading or incorrect information. D-verbose Diagnostics: Too much output caused by a single piece of incorrect code. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#127689 opened Jul 13, 2024 by veera-sivarajan
1
Tracking issue for future-incompatibility lint ptr_cast_add_auto_to_object A-lint Area: Lints (warnings about flaws in source code) such as unused_mut. A-raw-pointers Area: raw pointers, MaybeUninit, NonNull A-trait-objects Area: trait objects, vtable layout C-future-incompatibility Category: Future-incompatibility lints C-tracking-issue Category: A tracking issue for an RFC or an unstable feature. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#127323 opened Jul 4, 2024 by WaffleLapkin
2
*x == *y for trait objects produce move error, so it is not equivalent to PartialEq::eq(&*x, &*y) even though the reference says it is A-borrow-checker Area: The borrow checker A-diagnostics Area: Messages for errors, warnings, and lints A-docs Area: documentation for any part of the project, including the compiler, standard library, and tools A-trait-objects Area: trait objects, vtable layout C-bug Category: This is a bug. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#127215 opened Jul 1, 2024 by estebank
3
Allow dropping dyn Trait principal A-coercions Area: implicit and explicit `expr as Type` coercions A-trait-objects Area: trait objects, vtable layout disposition-merge This issue / PR is in PFCP or FCP with a disposition to merge it. finished-final-comment-period The final comment period is finished for this PR / Issue. needs-fcp This change is insta-stable, so needs a completed FCP to proceed. S-waiting-on-team Status: Awaiting decision from the relevant subteam (see the T-<team> label). T-lang Relevant to the language 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. to-announce Announce this issue on triage meeting WG-trait-system-refactor The Rustc Trait System Refactor Initiative
#126660 opened Jun 19, 2024 by Jules-Bertholet Loading…
1
@lcnr
35
Associated function from super traits not accessible via sub traits A-associated-items Area: Associated items (types, constants & functions) A-diagnostics Area: Messages for errors, warnings, and lints A-resolve Area: Name resolution A-trait-objects Area: trait objects, vtable layout C-bug Category: This is a bug. D-incorrect Diagnostics: A diagnostic that is giving misleading or incorrect information. D-verbose Diagnostics: Too much output caused by a single piece of incorrect code. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#124438 opened Apr 27, 2024 by WaffleLapkin
3
ICE: unexpected infer type A-trait-objects Area: trait objects, vtable layout C-bug Category: This is a bug. F-associated_const_equality `#![feature(associated_const_equality)]` I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ 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.
#123140 opened Mar 27, 2024 by matthiaskrgr
@fmease
4
Object lifetime defaults of GATs are not respected A-associated-items Area: Associated items (types, constants & functions) A-GATs Area: Generic associated types (GATs) A-lifetimes Area: Lifetimes / regions A-trait-objects Area: trait objects, vtable layout C-bug Category: This is a bug. 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.
#115379 opened Aug 30, 2023 by fmease
1
@fmease
4
Imperfect vtable layout with an empty super trait comming after non-empty one A-trait-objects Area: trait objects, vtable layout C-enhancement Category: An issue proposing an enhancement or a PR with one. C-optimization Category: An issue highlighting optimization opportunities or PRs implementing such F-trait_upcasting `#![feature(trait_upcasting)]` T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#114942 opened Aug 17, 2023 by WaffleLapkin
dyn Trait<'a> shouldn't carry 'a lifetime A-lifetimes Area: Lifetimes / regions A-trait-objects Area: trait objects, vtable layout C-discussion Category: Discussion or questions that doesn't represent real issues. T-types Relevant to the types team, which will review and decide on the PR/issue.
#104684 opened Nov 21, 2022 by yshui
5
Casting to dyn Trait implies 'static lifetime, but "lifetime may not live long enough" does not prompt A-diagnostics Area: Messages for errors, warnings, and lints A-lifetimes Area: Lifetimes / regions A-trait-objects Area: trait objects, vtable layout D-terse Diagnostics: An error or lint that doesn't give enough information about the problem at hand. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#104197 opened Nov 9, 2022 by farnz
2
Box<dyn FnOnce(T)> doesn't seem to be really contravariant with T A-trait-objects Area: trait objects, vtable layout A-traits Area: Trait system A-variance Area: Variance (https://doc.rust-lang.org/nomicon/subtyping.html) C-bug Category: This is a bug. 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.
#100728 opened Aug 18, 2022 by fakedrake
2
dyn XXX had impl Debug, but dyn XXX + Send can't Debug. A-trait-objects Area: trait objects, vtable layout A-traits Area: Trait system C-bug Category: This is a bug. T-types Relevant to the types team, which will review and decide on the PR/issue.
#96360 opened Apr 24, 2022 by rise0chen
8
Trait lifetime bounds seem to be insufficient A-lifetimes Area: Lifetimes / regions A-trait-objects Area: trait objects, vtable layout C-bug Category: This is a bug. 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.
#92520 opened Jan 3, 2022 by davidhalter
2
In Impl Trait for T with associated type that = T, bounds do not recognize that T impls Trait A-associated-items Area: Associated items (types, constants & functions) A-trait-objects Area: trait objects, vtable layout C-bug Category: This is a bug. 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.
#92505 opened Jan 3, 2022 by thorjelly
2
Tracking issue for future-incompatibility lint deref_into_dyn_supertrait A-lint Area: Lints (warnings about flaws in source code) such as unused_mut. A-trait-objects Area: trait objects, vtable layout C-future-incompatibility Category: Future-incompatibility lints C-tracking-issue Category: A tracking issue for an RFC or an unstable feature. S-tracking-needs-summary Status: It's hard to tell what's been done and what hasn't! Someone should do some investigation. 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.
#89460 opened Oct 2, 2021 by crlf0710
1
5
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