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ICE: delegation: unreachable

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) ❄️

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.

#150152 In rust-lang/rust;

· matthiaskrgr opened on Dec 19, 2025

compiler crash compiling wasmtime-internal-cranelift

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) ❄️

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.

#150149 In rust-lang/rust;

· greenpdx opened on Dec 19, 2025

<code>deny-warnings = true</code> not applied to <code>rustc_fluent_macro</code>?

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

E-needs-investigationCall for partcipation: This issues needs some investigation to determine current statusCall for partcipation: This issues needs some investigation to determine current status

T-bootstrapRelevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap)Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap)

Status: Open.

#150145 In rust-lang/rust;

· jieyouxu opened on Dec 19, 2025

Diagnostic refers to enum discriminant as <code>x.0</code>

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

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.

#150144 In rust-lang/rust;

· SimonSapin opened on Dec 19, 2025

Conflict implementation if implement trait for type alias

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

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.

#150143 In rust-lang/rust;

· mikialex opened on Dec 19, 2025

riscv64: RISC-V target fails clippy UI test cognitive_complexity.rs

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

S-needs-infoStatus: The issue lacks details necessary to triage or act on it.Status: The issue lacks details necessary to triage or act on it.

Status: Open.

#150134 In rust-lang/rust;

· yuzibo opened on Dec 18, 2025

ICE <code>to get the signature of a closure, use 'args.as_closure().sig()' not ''fn_sig()'</code>

A-coercionsArea: implicit and explicit `expr as Type` coercionsArea: implicit and explicit `expr as Type` coercions

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) ❄️

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.

#150128 In rust-lang/rust;

· matthiaskrgr opened on Dec 18, 2025

[aarch64-pc-windows-msvc] Coverage instrumentation produces malformed profile

A-code-coverageArea: Source-based code coverage (-Cinstrument-coverage)Area: Source-based code coverage (-Cinstrument-coverage)

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

O-aarch64-pc-windows-msvcTarget: aarch64-pc-windows-msvcTarget: aarch64-pc-windows-msvc

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.

#150123 In rust-lang/rust;

· vadimpiven opened on Dec 18, 2025

wasi-http proxy components don't conform to their world as of nightly-2025-12-10

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

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.

O-wasip2Operating System: WASI Preview 2 (*-wasip2)Operating System: WASI Preview 2 (*-wasip2)

Status: Open.

#150120 In rust-lang/rust;

· dgohman-fastly opened on Dec 18, 2025

Tracking Issue for <code>PinCoerceUnsized</code>

A-coercionsArea: implicit and explicit `expr as Type` coercionsArea: implicit and explicit `expr as Type` coercions

A-DSTsArea: Dynamically-sized types (DSTs)Area: Dynamically-sized types (DSTs)

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-coerce_unsizedThe `CoerceUnsized` traitThe `CoerceUnsized` trait

T-langRelevant to the language teamRelevant to the language team

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.

#150112 In rust-lang/rust;

· Darksonn opened on Dec 17, 2025

ICE: ast: <code>{{root}} != {{root}}</code>

A-ASTArea: ASTArea: AST

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) ❄️

requires-debug-assertionsThis issue requires a build of rustc or tooling with debug-assertions in some wayThis issue requires a build of rustc or tooling with debug-assertions in some way

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.

#150103 In rust-lang/rust;

· matthiaskrgr opened on Dec 17, 2025

Resolving lang concern on <code>dyn</code>-compatibility of <code>final fn</code> trait methods (RFC 3678)

I-lang-nominatedNominated for discussion during a lang team meeting.Nominated for discussion during a lang team meeting.

I-lang-radarItems that are on lang's radar and will need eventual work or consideration.Items that are on lang's radar and will need eventual work or consideration.

P-lang-drag-1Lang team prioritization drag level 1. https://rust-lang.zulipchat.com/#narrow/channel/410516-t-langLang team prioritization drag level 1. https://rust-lang.zulipchat.com/#narrow/channel/410516-t-lang

T-langRelevant to the language teamRelevant to the language team

Status: Open.

#150101 In rust-lang/rust;

· joshtriplett opened on Dec 17, 2025