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Implied bounds on nested references + variance = soundness hole

A-type-systemArea: Type systemArea: Type system

A-varianceArea: Variance (https://doc.rust-lang.org/nomicon/subtyping.html)Area: Variance (https://doc.rust-lang.org/nomicon/subtyping.html)

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

I-unsoundIssue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/SoundnessIssue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness

P-mediumMedium priorityMedium priority

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.

Status: Open.

#25860 In rust-lang/rust;

· aturon opened on May 28, 2015

Tracking issue for <code>?</code> operator and <code>try</code> blocks (RFC 243, <code>question_mark</code> &amp; <code>try_blocks</code> features)

A-error-handlingArea: Error handlingArea: Error handling

B-RFC-approvedBlocker: Approved by a merged RFC but not yet implemented.Blocker: Approved by a merged RFC but not yet implemented.

B-RFC-implementedBlocker: Approved by a merged RFC and implemented but not stabilized.Blocker: Approved by a merged RFC and implemented but not stabilized.

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

Libs-TrackedLibs issues that are tracked on the team's project board.Libs issues that are tracked on the team's project board.

S-tracking-design-concernsStatus: There are blocking design concerns.Status: There are blocking design concerns.

T-langRelevant to the language teamRelevant to the language team

T-libs-apiRelevant to the library API team, which will review and decide on the PR/issue.Relevant to the library API team, which will review and decide on the PR/issue.

Status: Open.

#31436 In rust-lang/rust;

· nikomatsakis opened on Feb 5, 2016

Tracking Issue for experimental <code>yeet</code> expressions (<code>feature(yeet_expr)</code>)

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

T-langRelevant to the language teamRelevant to the language team

Status: Open.

#96373 In rust-lang/rust;

· scottmcm opened on Apr 25, 2022

Annotating higher-ranked lifetimes on closures is arduous

A-closuresArea: Closures (`|…| { … }`)Area: Closures (`|…| { … }`)

A-lifetimesArea: Lifetimes / regionsArea: Lifetimes / regions

T-langRelevant to the language teamRelevant to the language team

Status: Open.

#58052 In rust-lang/rust;

· pnkfelix opened on Feb 1, 2019

Filter adapter for <code>LendingIterator</code> requires Polonius

A-GATsArea: Generic associated types (GATs)Area: Generic associated types (GATs)

fixed-by-poloniusCompiling with `-Zpolonius` fixes this issue.Compiling with `-Zpolonius` fixes this issue.

GATs-triagedIssues using the `generic_associated_types` feature that have been triagedIssues using the `generic_associated_types` feature that have been triaged

Status: Open.

#92985 In rust-lang/rust;

· jackh726 opened on Jan 16, 2022

Typesystem soundness hole involving cyclically-defined ATIT, and normalization in trait bounds

A-associated-itemsArea: Associated items (types, constants & functions)Area: Associated items (types, constants & functions)

A-trait-systemArea: Trait systemArea: Trait system

A-type-systemArea: Type systemArea: Type system

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.

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

I-unsoundIssue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/SoundnessIssue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness

P-mediumMedium priorityMedium priority

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.

#135011 In rust-lang/rust;

· steffahn opened on Jan 2, 2025

<code>repr(Rust)</code> unions (including <code>MaybeUninit</code>) do not preserve padding bytes

A-ABIArea: Concerning the application binary interface (ABI)Area: Concerning the application binary interface (ABI)

T-opsemRelevant to the opsem teamRelevant to the opsem team

Status: Open.

#99604 In rust-lang/rust;

· ghost opened on Jul 22, 2022

Tracking Issue for De-RFC 3307: Remove type ascription

B-RFC-approvedBlocker: Approved by a merged RFC but not yet implemented.Blocker: Approved by a merged RFC but not yet implemented.

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

S-tracking-remove-implementationStatus: The feature needs to be removed from the Rust toolchain before this issue can be closedStatus: The feature needs to be removed from the Rust toolchain before this issue can be closed

T-langRelevant to the language teamRelevant to the language team

Status: Open.

#101728 In rust-lang/rust;

· Manishearth opened on Sep 12, 2022

Tracking Issue for <code>stdio_makes_pipe</code>

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

T-libs-apiRelevant to the library API team, which will review and decide on the PR/issue.Relevant to the library API team, which will review and decide on the PR/issue.

Status: Open.

#98288 In rust-lang/rust;

· ChrisDenton opened on Jun 20, 2022

Tracking issue for RFC 3519: <code>arbitrary_self_types</code>

B-RFC-approvedBlocker: Approved by a merged RFC but not yet implemented.Blocker: Approved by a merged RFC but not yet 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-arbitrary_self_types`#![feature(arbitrary_self_types)]``#![feature(arbitrary_self_types)]`

S-tracking-needs-summaryStatus: It's hard to tell what's been done and what hasn't! Someone should do some investigation.Status: It's hard to tell what's been done and what hasn't! Someone should do some investigation.

S-types-deferredStatus: Identified as a valid potential future enhancement that is not currently being worked onStatus: Identified as a valid potential future enhancement that is not currently being worked on

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.

#44874 In rust-lang/rust;

· arielb1 opened on Sep 26, 2017

Undefined reference to <code>_Unwind_Resume</code>

A-linkageArea: linking into static, shared libraries and binariesArea: linking into static, shared libraries and binaries

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.

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.

#47493 In rust-lang/rust;

· jefftime opened on Jan 16, 2018

Mutually exclusive traits still cause conflict in blancket implementation

A-trait-systemArea: Trait systemArea: Trait system

C-feature-requestCategory: A feature request, i.e: not implemented / a PR.Category: A feature request, i.e: not implemented / a PR.

T-langRelevant to the language teamRelevant to the language team

Status: Open.

#51774 In rust-lang/rust;

· DominusCarnufex opened on Jun 25, 2018