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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

rustc is unable to evaluate a singular conditional pathway predicated on the length of an array literal

A-const-propArea: Constant propagationArea: Constant propagation

A-lintsArea: Lints (warnings about flaws in source code) such as unused_mut.Area: Lints (warnings about flaws in source code) such as unused_mut.

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

L-unconditional_panicLint: unconditional_panicLint: unconditional_panic

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.

#119908 In rust-lang/rust;

· barabadzhi opened on Jan 12, 2024

Remove duplicate diagnostics introduced by #119432

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

A-const-propArea: Constant propagationArea: Constant propagation

A-diagnosticsArea: Messages for errors, warnings, and lintsArea: Messages for errors, warnings, and lints

C-cleanupCategory: PRs that clean code up or issues documenting cleanup.Category: PRs that clean code up or issues documenting cleanup.

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.

#119647 In rust-lang/rust;

· gurry opened on Jan 6, 2024

Compiling with <code>overflow-checks = true</code> is slow and uses high amounts of RAM

A-const-propArea: Constant propagationArea: Constant propagation

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

I-compilememIssue: Problems and improvements with respect to memory usage during compilation.Issue: Problems and improvements with respect to memory usage during compilation.

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.

#117295 In rust-lang/rust;

· Zannick opened on Oct 27, 2023

const_prop_lint can't tell when code guarded with &amp;&amp; is dead

A-const-propArea: Constant propagationArea: Constant propagation

A-lintsArea: Lints (warnings about flaws in source code) such as unused_mut.Area: Lints (warnings about flaws in source code) such as unused_mut.

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.

#113905 In rust-lang/rust;

· SvenKeimpema opened on Jul 20, 2023

rustc will emit code for const-eval false branches

A-codegenArea: Code generationArea: Code generation

A-const-propArea: Constant propagationArea: Constant propagation

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.

#108857 In rust-lang/rust;

· Voultapher opened on Mar 7, 2023

Limited constant propagation on Enum tag when Box is involved

A-const-propArea: Constant propagationArea: Constant propagation

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-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.

#106936 In rust-lang/rust;

· douglas-raillard-arm opened on Jan 16, 2023

unconditional_panic lint getting recognized in code that actually panics condtionally

A-const-propArea: Constant propagationArea: Constant propagation

A-control-flowArea: Control flowArea: Control flow

A-lintsArea: Lints (warnings about flaws in source code) such as unused_mut.Area: Lints (warnings about flaws in source code) such as unused_mut.

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.

#90534 In rust-lang/rust;

· pro465 opened on Nov 3, 2021

Return value from const_trait_impl did not promote to constant?

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

A-const-propArea: Constant propagationArea: Constant propagation

A-diagnosticsArea: Messages for errors, warnings, and lintsArea: Messages for errors, warnings, and lints

A-suggestion-diagnosticsArea: Suggestions generated by the compiler applied by `cargo fix`Area: Suggestions generated by the compiler applied by `cargo fix`

D-newcomer-roadblockDiagnostics: Confusing error or lint; hard to understand for new users.Diagnostics: Confusing error or lint; hard to understand for new users.

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.

#69574 In rust-lang/rust;

· crlf0710 opened on Feb 29, 2020