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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

Stop clearing box's drop flags early

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

S-waiting-on-authorStatus: This is awaiting some action (such as code changes or more information) from the author.Status: This is awaiting some action (such as code changes or more information) from the author.

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 (in progress).

rust-lang/rustnumber 131146

#131146 In rust-lang/rust;

· beepster4096 opened on Oct 2, 2024

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

Tracking Issue for <code>box_vec_non_null</code>

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

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

<code>Vec::into_boxed_slice</code> 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

<code>Box</code> 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 -&gt; <code>Box</code> copy when data can be put in <code>Box</code> 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

box syntax creates Box&lt;T&gt; 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

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

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

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

Could the compiler automatically re-use <code>Box</code> 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