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Issues list

Type inference of inferred repeat expr counts is not as strong as it could be A-array Area: `[T; N]` C-bug Category: This is a bug. F-generic_arg_infer Using `_` as a const argument: #![feature(generic_arg_infer)]` F-marker_trait_attr `#![feature(marker_trait_attr)]` 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.
#140855 opened May 9, 2025 by BoxyUwU
Tracking issue for release notes of #74985: Tracking Issue for slice::array_chunks A-array Area: `[T; N]` A-const-generics Area: const generics (parameters and arguments) A-slice Area: `[T]` needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. 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-libs-api Relevant to the library API team, which will review and decide on the PR/issue.
#139693 opened Apr 11, 2025 by rustbot
1
Large amount of generated code for match statements with large arrays A-array Area: `[T; N]` A-MIR Area: Mid-level IR (MIR) - https://blog.rust-lang.org/2016/04/19/MIR.html A-patterns Relating to patterns and pattern matching C-optimization Category: An issue highlighting optimization opportunities or PRs implementing such I-heavy Issue: Problems and improvements with respect to binary size of generated code. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#110870 opened Apr 26, 2023 by alex
1
6
Rust produces unlinkable code when writing large arrays A-array Area: `[T; N]` A-linkage Area: linking into static, shared libraries and binaries C-bug Category: This is a bug. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#108566 opened Feb 28, 2023 by msrd0
5
Unsafe block does not propagate into array length A-array Area: `[T; N]`
#105204 opened Dec 3, 2022 by RalfJung
Suggest .try_into().unwrap() or as _ for const parameters of the wrong type (e.g., in array types) if applicable and possible on stable A-array Area: `[T; N]` A-const-generics Area: const generics (parameters and arguments) A-diagnostics Area: Messages for errors, warnings, and lints D-lack-of-suggestion Diagnostics: Adding a (structured) suggestion would increase the quality of the diagnostic. D-terse Diagnostics: An error or lint that doesn't give enough information about the problem at hand. S-blocked Status: 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.
#104949 opened Nov 26, 2022 by scvalex
8
[ER] Sub-optimal allocation of simple zeroed Vec of arrays A-array Area: `[T; N]` A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-optimization Category: An issue highlighting optimization opportunities or PRs implementing such I-slow Issue: Problems and improvements with respect to performance of generated code. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#104847 opened Nov 24, 2022 by leonardo-m
3
Provide structural pinning guarantees for slices, vecs, arrays A-array Area: `[T; N]` A-docs Area: Documentation for any part of the project, including the compiler, standard library, and tools
#104108 opened Nov 7, 2022 by yoshuawuyts
4
core::array::from_fn segfaults (v1.64, v1.63) A-array Area: `[T; N]` C-bug Category: This is a bug.
#103756 opened Oct 30, 2022 by mvniekerk
4
transitive coercion to slice doesn't work for arrays A-array Area: `[T; N]` A-coercions Area: implicit and explicit `expr as Type` coercions C-bug Category: This is a bug.
#103259 opened Oct 19, 2022 by oconnor663
1
str::array_split for splitting a string into a constant number of substrings A-array Area: `[T; N]` A-const-generics Area: const generics (parameters and arguments) A-str Area: str and String T-libs-api Relevant to the library API team, which will review and decide on the PR/issue.
#102905 opened Oct 11, 2022 by pitaj
6
Function operating on arrays performs a lot worse for arrays of length 2 A-array Area: `[T; N]` A-codegen Area: Code generation A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. I-slow Issue: Problems and improvements with respect to performance of generated code. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#102274 opened Sep 25, 2022 by Canleskis
4
Array bound test with two simple loops A-array Area: `[T; N]` A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. I-slow Issue: Problems and improvements with respect to performance of generated code. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#102136 opened Sep 22, 2022 by leonardo-m
2
Tracking Issue for Iterator::array_chunks A-array Area: `[T; N]` C-tracking-issue Category: An issue tracking the progress of sth. like the implementation of an RFC T-libs-api Relevant to the library API team, which will review and decide on the PR/issue.
#100450 opened Aug 12, 2022 by WaffleLapkin
1 of 7 tasks
7
Rust allocates stack space for constant arrays, overflowing the stack A-array Area: `[T; N]` C-bug Category: This is a bug.
#99111 opened Jul 10, 2022 by DanielT
9
Cannot transmute between ZST and zero-sized generic array A-array Area: `[T; N]` C-bug Category: This is a bug.
#98104 opened Jun 14, 2022 by lukas-code
1
Array Repeat operator should not use a loop for small sizes A-array Area: `[T; N]` A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. E-needs-test Call for participation: An issue has been fixed and does not reproduce, but no test has been added. I-slow Issue: Problems and improvements with respect to performance of generated code. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#97804 opened Jun 6, 2022 by programmerjake
7
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
memcpy-style copies of small fixed length arrays become memcpy, unless done via a loop with ops::Index A-array Area: `[T; N]` A-codegen Area: Code generation C-optimization Category: An issue highlighting optimization opportunities or PRs implementing such I-slow Issue: Problems and improvements with respect to performance of generated code.
#92993 opened Jan 17, 2022 by saethlin
4
Array copy const fn is surprisingly slow A-array Area: `[T; N]`
#92511 opened Jan 3, 2022 by nico-abram
3
Vec of 2D or 3D arrays generates very slow code A-array Area: `[T; N]` C-bug Category: This is a bug. I-slow Issue: Problems and improvements with respect to performance of generated code.
#92350 opened Dec 28, 2021 by leonardo-m
3
Tracking Issue for additional array::IntoIter constructors (feature array_into_iter_constructors) A-array Area: `[T; N]` C-tracking-issue Category: An issue tracking the progress of sth. like the implementation of an RFC T-libs-api Relevant to the library API team, which will review and decide on the PR/issue.
#91583 opened Dec 6, 2021 by scottmcm
1 of 6 tasks
2
[ER] Boxed array conversion function A-array Area: `[T; N]` C-feature-request Category: A feature request, i.e: not implemented / a PR. T-libs Relevant to the library team, which will review and decide on the PR/issue.
#90606 opened Nov 5, 2021 by leonardo-m
Tracking Issue for split_array A-array Area: `[T; N]` C-tracking-issue Category: An issue tracking the progress of sth. like the implementation of an RFC T-libs-api Relevant to the library API team, which will review and decide on the PR/issue.
#90091 opened Oct 20, 2021 by jethrogb
2 tasks
1
39
Tracking issue for try_array_from_fn A-array Area: `[T; N]` C-tracking-issue Category: An issue tracking the progress of sth. like the implementation of an RFC T-libs-api Relevant to the library API team, which will review and decide on the PR/issue.
#89379 opened Sep 29, 2021 by c410-f3r
1 of 3 tasks
22
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