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ICE: abi: index out of bounds (<code>offsets[FieldIdx::new(i)]</code>)

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

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

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

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

needs-triageThis issue may need triage. Remove it if it has been sufficiently triaged.This issue may need triage. Remove it if it has been sufficiently triaged.

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.

#150714 In rust-lang/rust;

· matthiaskrgr opened on Jan 5, 2026

ICE: <code>expected branch, got Leaf</code>

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

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

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

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

needs-triageThis issue may need triage. Remove it if it has been sufficiently triaged.This issue may need triage. Remove it if it has been sufficiently triaged.

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.

#150712 In rust-lang/rust;

· matthiaskrgr opened on Jan 5, 2026

ICE in resolve

A-macrosArea: All kinds of macros (custom derive, macro_rules!, proc macros, ..)Area: All kinds of macros (custom derive, macro_rules!, proc macros, ..)

A-resolveArea: Name/path resolution done by `rustc_resolve` specificallyArea: Name/path resolution done by `rustc_resolve` specifically

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

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

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

needs-triageThis issue may need triage. Remove it if it has been sufficiently triaged.This issue may need triage. Remove it if it has been sufficiently triaged.

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.

#150711 In rust-lang/rust;

· matthiaskrgr opened on Jan 5, 2026

Additional suggestion for returning async closure Future is wrong

A-async-closures`async || {}``async || {}`

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

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.

D-invalid-suggestionDiagnostics: A structured suggestion resulting in incorrect code.Diagnostics: A structured suggestion resulting in incorrect code.

needs-triageThis issue may need triage. Remove it if it has been sufficiently triaged.This issue may need triage. Remove it if it has been sufficiently triaged.

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.

#150701 In rust-lang/rust;

· solidrive934 opened on Jan 5, 2026

E0631 in closure arguments suggest invalid type parameter

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

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

D-invalid-suggestionDiagnostics: A structured suggestion resulting in incorrect code.Diagnostics: A structured suggestion resulting in incorrect code.

needs-triageThis issue may need triage. Remove it if it has been sufficiently triaged.This issue may need triage. Remove it if it has been sufficiently triaged.

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.

#150693 In rust-lang/rust;

· A4-Tacks opened on Jan 5, 2026

LLVM recursion stack overflow with sccache when buildin fresh

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-crashIssue: The compiler crashes (SIGSEGV, SIGABRT, etc). Use I-ICE instead when the compiler panics.Issue: The compiler crashes (SIGSEGV, SIGABRT, etc). Use I-ICE instead when the compiler panics.

S-needs-reproStatus: This issue has no reproduction and needs a reproduction to make progress.Status: This issue has no reproduction and needs a reproduction to make progress.

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.

#150691 In rust-lang/rust;

· madonuko opened on Jan 5, 2026

Possibly Missed Optimization

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

needs-triageThis issue may need triage. Remove it if it has been sufficiently triaged.This issue may need triage. Remove it if it has been sufficiently triaged.

Status: Open.

#150690 In rust-lang/rust;

· brooklyn-1337 opened on Jan 5, 2026

Docs for <code>MaybeUninit::assume_init</code> should indicate that reading uninit POD isn't sound

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

E-easyCall for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue.Call for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue.

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

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.

#150689 In rust-lang/rust;

· tgross35 opened on Jan 5, 2026

TAIT bug report from tracking issue

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

needs-triageThis issue may need triage. Remove it if it has been sufficiently triaged.This issue may need triage. Remove it if it has been sufficiently triaged.

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

Status: Open.

#150685 In rust-lang/rust;

· BoxyUwU opened on Jan 5, 2026

Linking <code>sparc64-unknown-netbsd</code> error <code>relocation R_SPARC_64 cannot be used against local symbol</code>

needs-triageThis issue may need triage. Remove it if it has been sufficiently triaged.This issue may need triage. Remove it if it has been sufficiently triaged.

Status: Open.

#150680 In rust-lang/rust;

· Wyvern opened on Jan 4, 2026

mipsel-sony-psx - potential load delay slot issue

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-miscompileIssue: Correct Rust code lowers to incorrect machine codeIssue: Correct Rust code lowers to incorrect machine code

O-MIPSTarget: MIPS processorsTarget: MIPS processors

P-lowLow priorityLow priority

S-needs-reproStatus: This issue has no reproduction and needs a reproduction to make progress.Status: This issue has no reproduction and needs a reproduction to make progress.

Status: Open.

#150676 In rust-lang/rust;

· JaberwockySeamonstah opened on Jan 4, 2026

ICE: delegation: index out of bounds

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

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

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

S-has-bisectionStatus: A bisection has been found for this issueStatus: A bisection has been found for this issue

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.

#150673 In rust-lang/rust;

· matthiaskrgr opened on Jan 4, 2026