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AsyncDrop not called when type is inside Box

A-boxArea: Our favorite opsem complicationArea: Our favorite opsem complication

C-bugCategory: This is a bug.Category: This is a bug.

F-async_drop`#![feature(async_drop)]``#![feature(async_drop)]`

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#143658 In rust-lang/rust;

· beepster4096 opened on Jul 8, 2025

1 comment

CString being noalias is a footgun

A-boxArea: Our favorite opsem complicationArea: Our favorite opsem complication

A-FFIArea: Foreign function interface (FFI)Area: Foreign function interface (FFI)

C-bugCategory: This is a bug.Category: This is a bug.

T-langRelevant to the language teamRelevant to the language team

T-libs-apiRelevant to the library API team, which will review and decide on the PR/issue.Relevant to the library API team, which will review and decide on the PR/issue.

T-opsemRelevant to the opsem teamRelevant to the opsem team

Status: Open.

#136770 In rust-lang/rust;

· theemathas opened on Feb 9, 2025

10 comments

Box sometimes forgets to drop its allocator when the Box is conditionally initialized.

A-allocatorsArea: Custom and system allocatorsArea: Custom and system allocators

A-boxArea: Our favorite opsem complicationArea: Our favorite opsem complication

A-MIRArea: Mid-level IR (MIR) - https://blog.rust-lang.org/2016/04/19/MIR.htmlArea: Mid-level IR (MIR) - https://blog.rust-lang.org/2016/04/19/MIR.html

C-bugCategory: This is a bug.Category: This is a bug.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#131082 In rust-lang/rust;

· theemathas opened on Oct 1, 2024

2

2 comments



Tracking Issue for box_vec_non_null

A-boxArea: Our favorite opsem complicationArea: Our favorite opsem complication

C-tracking-issueCategory: An issue tracking the progress of sth. like the implementation of an RFCCategory: An issue tracking the progress of sth. like the implementation of an RFC

T-libs-apiRelevant to the library API team, which will review and decide on the PR/issue.Relevant to the library API team, which will review and decide on the PR/issue.

Status: Open.

Tracking Issue

#130364 In rust-lang/rust;

· theemathas opened on Sep 14, 2024

2 comments

Tracking Issue for box_as_ptr

A-boxArea: Our favorite opsem complicationArea: Our favorite opsem complication

C-tracking-issueCategory: An issue tracking the progress of sth. like the implementation of an RFCCategory: An issue tracking the progress of sth. like the implementation of an RFC

T-libsRelevant to the library team, which will review and decide on the PR/issue.Relevant to the library team, which will review and decide on the PR/issue.

Status: Open.

Tracking Issue

#129090 In rust-lang/rust;

· RalfJung opened on Aug 14, 2024

7 comments

Vec::into_boxed_slice no-excess guarantee regressed in 1.77.0

A-boxArea: Our favorite opsem complicationArea: Our favorite opsem complication

A-docsArea: Documentation for any part of the project, including the compiler, standard library, and toolsArea: Documentation for any part of the project, including the compiler, standard library, and tools

C-bugCategory: This is a bug.Category: This is a bug.

E-help-wantedCall for participation: Help is requested to fix this issue.Call for participation: Help is requested to fix this issue.

T-libs-apiRelevant to the library API team, which will review and decide on the PR/issue.Relevant to the library API team, which will review and decide on the PR/issue.

Status: Open.

#125941 In rust-lang/rust;

· str4d opened on Jun 3, 2024

4 comments



ICE: 'index out of bounds: the len is 1 but the index is 1' with Cdebuginfo=2

A-boxArea: Our favorite opsem complicationArea: Our favorite opsem complication

A-debuginfoArea: Debugging information in compiled programs (DWARF, PDB, etc.)Area: Debugging information in compiled programs (DWARF, PDB, etc.)

C-bugCategory: This is a bug.Category: This is a bug.

I-ICEIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#105263 In rust-lang/rust;

· matthiaskrgr opened on Dec 4, 2022

6 comments

Box documentation regarding allocation for ZSTs

A-boxArea: Our favorite opsem complicationArea: Our favorite opsem complication

A-docsArea: Documentation for any part of the project, including the compiler, standard library, and toolsArea: Documentation for any part of the project, including the compiler, standard library, and tools

C-bugCategory: This is a bug.Category: This is a bug.

T-libsRelevant to the library team, which will review and decide on the PR/issue.Relevant to the library team, which will review and decide on the PR/issue.

Status: Open.

#104039 In rust-lang/rust;

· zdivelbiss opened on Nov 6, 2022

Avoid stack -> Box copy when data can be put in Box directly

A-boxArea: Our favorite opsem complicationArea: Our favorite opsem complication

A-codegenArea: Code generationArea: Code generation

C-bugCategory: This is a bug.Category: This is a bug.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#101829 In rust-lang/rust;

· jrmuizel opened on Sep 14, 2022

8 comments

box syntax creates Box<T> where T is not yet initialized

A-boxArea: Our favorite opsem complicationArea: Our favorite opsem complication

A-MIRArea: Mid-level IR (MIR) - https://blog.rust-lang.org/2016/04/19/MIR.htmlArea: Mid-level IR (MIR) - https://blog.rust-lang.org/2016/04/19/MIR.html

A-miriArea: The miri toolArea: The miri tool

C-bugCategory: This is a bug.Category: This is a bug.

Status: Open.

#97270 In rust-lang/rust;

· matthiaskrgr opened on May 22, 2022

19 comments

Boxes with custom allocators break several underlying assumptions in Miri (and MIR more broadly)

A-allocatorsArea: Custom and system allocatorsArea: Custom and system allocators

A-boxArea: Our favorite opsem complicationArea: Our favorite opsem complication

A-MIRArea: Mid-level IR (MIR) - https://blog.rust-lang.org/2016/04/19/MIR.htmlArea: Mid-level IR (MIR) - https://blog.rust-lang.org/2016/04/19/MIR.html

C-bugCategory: This is a bug.Category: This is a bug.

I-ICEIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#95453 In rust-lang/rust;

· autumnontape opened on Mar 30, 2022

27 comments

noalias on a Box doesn't seem to have an impact when compiling without -C panic=abort

A-boxArea: Our favorite opsem complicationArea: Our favorite opsem complication

A-codegenArea: Code generationArea: Code generation

C-bugCategory: This is a bug.Category: This is a bug.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#95323 In rust-lang/rust;

· jrmuizel opened on Mar 26, 2022

6 comments

Could the compiler automatically re-use Box allocations as an optimization?

A-boxArea: Our favorite opsem complicationArea: Our favorite opsem complication

A-LLVMArea: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.

A-mir-optArea: MIR optimizationsArea: MIR optimizations

C-optimizationCategory: An issue highlighting optimization opportunities or PRs implementing suchCategory: An issue highlighting optimization opportunities or PRs implementing such

I-slowIssue: Problems and improvements with respect to performance of generated code.Issue: Problems and improvements with respect to performance of generated code.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#93707 In rust-lang/rust;

· scottmcm opened on Feb 6, 2022

4 comments

slow compilation of large struct with Box-members and ? in field init

A-boxArea: Our favorite opsem complicationArea: Our favorite opsem complication

A-LLVMArea: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.

C-bugCategory: This is a bug.Category: This is a bug.

I-compiletimeIssue: Problems and improvements with respect to compile times.Issue: Problems and improvements with respect to compile times.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#93257 In rust-lang/rust;

· M1cha opened on Jan 24, 2022

2 comments

Tracking Issue for thin_box

A-boxArea: Our favorite opsem complicationArea: Our favorite opsem complication

C-tracking-issueCategory: An issue tracking the progress of sth. like the implementation of an RFCCategory: An issue tracking the progress of sth. like the implementation of an RFC

T-libs-apiRelevant to the library API team, which will review and decide on the PR/issue.Relevant to the library API team, which will review and decide on the PR/issue.

Status: Open.

#92791 In rust-lang/rust;

· yaahc opened on Jan 11, 2022

34 comments

&Box<[T]> does not impl IntoIterator

A-boxArea: Our favorite opsem complicationArea: Our favorite opsem complication

A-iteratorsArea: IteratorsArea: Iterators

C-feature-requestCategory: A feature request, i.e: not implemented / a PR.Category: A feature request, i.e: not implemented / a PR.

T-libs-apiRelevant to the library API team, which will review and decide on the PR/issue.Relevant to the library API team, which will review and decide on the PR/issue.

Status: Open.

#83589 In rust-lang/rust;

· lopopolo opened on Mar 27, 2021

4 comments

Boxing zeroed arrays and slices uses rust_alloc + memset instead of rust_alloc_zeroed

A-boxArea: Our favorite opsem complicationArea: Our favorite opsem complication

C-enhancementCategory: An issue proposing an enhancement or a PR with one.Category: An issue proposing an enhancement or a PR with one.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

T-opsemRelevant to the opsem teamRelevant to the opsem team

Status: Open.

#80752 In rust-lang/rust;

· leonardo-m opened on Jan 6, 2021

1 comment

Tracking Issue for box_into_inner

A-boxArea: Our favorite opsem complicationArea: Our favorite opsem complication

C-tracking-issueCategory: An issue tracking the progress of sth. like the implementation of an RFCCategory: An issue tracking the progress of sth. like the implementation of an RFC

disposition-mergeThis issue / PR is in PFCP or FCP with a disposition to merge it.This issue / PR is in PFCP or FCP with a disposition to merge it.

Libs-TrackedLibs issues that are tracked on the team's project board.Libs issues that are tracked on the team's project board.

proposed-final-comment-periodProposed to merge/close by relevant subteam, see T-<team> label. Will enter FCP once signed off.Proposed to merge/close by relevant subteam, see T-<team> label. Will enter FCP once signed off.

T-libs-apiRelevant to the library API team, which will review and decide on the PR/issue.Relevant to the library API team, which will review and decide on the PR/issue.

Status: Open.

#80437 In rust-lang/rust;

· crlf0710 opened on Dec 28, 2020

83 comments

Tracking Issue for Box::into_boxed_slice

A-boxArea: Our favorite opsem complicationArea: Our favorite opsem complication

A-sliceArea: `[T]`Area: `[T]`

B-unstableBlocker: Implemented in the nightly compiler and unstable.Blocker: Implemented in the nightly compiler and unstable.

C-tracking-issueCategory: An issue tracking the progress of sth. like the implementation of an RFCCategory: An issue tracking the progress of sth. like the implementation of an RFC

Libs-SmallLibs issues that are considered "small" or self-containedLibs issues that are considered "small" or self-contained

Libs-TrackedLibs issues that are tracked on the team's project board.Libs issues that are tracked on the team's project board.

T-libs-apiRelevant to the library API team, which will review and decide on the PR/issue.Relevant to the library API team, which will review and decide on the PR/issue.

Status: Open.

#71582 In rust-lang/rust;

· elichai opened on Apr 26, 2020

6 comments

Stack overflow with Boxed array

A-boxArea: Our favorite opsem complicationArea: Our favorite opsem complication

A-codegenArea: Code generationArea: Code generation

A-LLVMArea: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#53827 In rust-lang/rust;

· opus111 opened on Aug 30, 2018

46 comments