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marker traits, cannot prefer impl with no bounds

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

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

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.

Status: Open.

#109481 In rust-lang/rust;

· lcnr opened on Mar 22, 2023

ICE in compiler/rustc_monomorphize/src/collector.rs when combining #[marker] and min_specialization

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

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

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

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.

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.

requires-nightlyThis issue requires a nightly compiler in some way.This issue requires a nightly compiler in some way.

Status: Open.

#96235 In rust-lang/rust;

· the8472 opened on Apr 20, 2022

#[marker]: overlapping impls misinteract with lifetimes

A-lifetimesArea: Lifetimes / regionsArea: Lifetimes / regions

A-trait-systemArea: Trait systemArea: Trait system

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

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

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-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.

requires-nightlyThis issue requires a nightly compiler in some way.This issue requires a nightly compiler in some way.

Status: Open.

#89515 In rust-lang/rust;

· danielhenrymantilla opened on Oct 4, 2021

"Mismatched type" with #[marker] + coinductive trait impl

A-coinductionArea: Concerning coinduction, most often for auto traitsArea: Concerning coinduction, most often for auto traits

A-trait-systemArea: Trait systemArea: Trait system

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

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

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.

requires-nightlyThis issue requires a nightly compiler in some way.This issue requires a nightly compiler in some way.

Status: Open.

#124786 In rust-lang/rust;

· Jules-Bertholet opened on May 6, 2024

Tracking issue for allowing overlapping implementations for marker trait

A-trait-systemArea: Trait systemArea: Trait system

B-RFC-implementedBlocker: Approved by a merged RFC and implemented.Blocker: Approved by a merged RFC and implemented.

B-unstableBlocker: Implemented in the nightly compiler and unstable.Blocker: Implemented in the nightly compiler and unstable.

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-marker_trait_attr`#![feature(marker_trait_attr)]``#![feature(marker_trait_attr)]`

S-tracking-blockedStatus: This tracking issue is blocked on another tracking issueStatus: This tracking issue is blocked on another tracking issue

S-tracking-needs-to-bakeStatus: The implementation is "complete" but it needs time to bake.Status: The implementation is "complete" but it needs time to bake.

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

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.

#29864 In rust-lang/rust;

· nikomatsakis opened on Nov 16, 2015