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Tracking Issue for RFC 3762, "Make trait methods callable in const contexts"

A-const-evalArea: Constant evaluation, covers all const contexts (static, const fn, ...)Area: Constant evaluation, covers all const contexts (static, const fn, ...)

A-trait-systemArea: Trait systemArea: Trait system

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

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

PG-const-traitsProject group: Const traitsProject group: Const traits

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-langRelevant to the language teamRelevant to the language team

WG-const-evalWorking group: Const evaluationWorking group: Const evaluation

Status: Open.

#143874 In rust-lang/rust;

· fee1-dead opened on Jul 13, 2025

dealing with cyclic (self-referential) values with const_heap

A-const-evalArea: Constant evaluation, covers all const contexts (static, const fn, ...)Area: Constant evaluation, covers all const contexts (static, const fn, ...)

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

F-const_heap`#[feature(const_heap)]``#[feature(const_heap)]`

WG-const-evalWorking group: Const evaluationWorking group: Const evaluation

Status: Open.

#143869 In rust-lang/rust;

· fee1-dead opened on Jul 13, 2025

ICE: <code>expected SIMD field to have definite array size</code>

A-const-evalArea: Constant evaluation, covers all const contexts (static, const fn, ...)Area: Constant evaluation, covers all const contexts (static, const fn, ...)

A-SIMDArea: SIMD (Single Instruction Multiple Data)Area: SIMD (Single Instruction Multiple Data)

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.

WG-const-evalWorking group: Const evaluationWorking group: Const evaluation

Status: Open.

#137291 In rust-lang/rust;

· folkertdev opened on Feb 19, 2025

temporary value dropped while borrowed

A-const-evalArea: Constant evaluation, covers all const contexts (static, const fn, ...)Area: Constant evaluation, covers all const contexts (static, const fn, ...)

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

regression-from-stable-to-stablePerformance or correctness regression from one stable version to another.Performance or correctness regression from one stable version to another.

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.

WG-const-evalWorking group: Const evaluationWorking group: Const evaluation

Status: Open.

#132578 In rust-lang/rust;

· vickenty opened on Nov 3, 2024

Recursive const stability checks do not apply in const items

A-const-evalArea: Constant evaluation, covers all const contexts (static, const fn, ...)Area: Constant evaluation, covers all const contexts (static, const fn, ...)

A-stabilityArea: `#[stable]`, `#[unstable]` etc.Area: `#[stable]`, `#[unstable]` etc.

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.

WG-const-evalWorking group: Const evaluationWorking group: Const evaluation

Status: Open.

#132536 In rust-lang/rust;

· RalfJung opened on Nov 2, 2024

Clean up implicit const promotion behavior

A-const-propArea: Constant propagationArea: Constant propagation

A-maybe-future-editionSomething we may consider for a future edition.Something we may consider for a future edition.

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-langRelevant to the language teamRelevant to the language team

WG-const-evalWorking group: Const evaluationWorking group: Const evaluation

Status: Open.

#124328 In rust-lang/rust;

· RalfJung opened on Apr 24, 2024

Constant gets evaluated despite unsatisfied where clauses

A-const-evalArea: Constant evaluation, covers all const contexts (static, const fn, ...)Area: Constant evaluation, covers all const contexts (static, const fn, ...)

A-const-genericsArea: const generics (parameters and arguments)Area: const generics (parameters and arguments)

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

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

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

requires-incomplete-featuresThis issue requires the use of incomplete features.This issue requires the use of incomplete features.

S-bug-has-testStatus: This bug is tracked inside the repo by a `known-bug` test.Status: This bug is tracked inside the repo by a `known-bug` test.

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.

WG-const-evalWorking group: Const evaluationWorking group: Const evaluation

Status: Open.

#97477 In rust-lang/rust;

· RalfJung opened on May 28, 2022

const_allocate intrinsic: what should it do at runtime?

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

A-const-evalArea: Constant evaluation, covers all const contexts (static, const fn, ...)Area: Constant evaluation, covers all const contexts (static, const fn, ...)

C-discussionCategory: Discussion or questions that doesn't represent real issues.Category: Discussion or questions that doesn't represent real issues.

WG-const-evalWorking group: Const evaluationWorking group: Const evaluation

Status: Open.

#93935 In rust-lang/rust;

· RalfJung opened on Feb 12, 2022