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u16 format precision change, breach of the Rust stability guarantee

A-fmtArea: `core::fmt`Area: `core::fmt`

A-stabilityArea: `#[stable]`, `#[unstable]` etc.Area: `#[stable]`, `#[unstable]` etc.

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

I-libs-api-nominatedNominated for discussion during a libs-api team meeting.Nominated for discussion during a libs-api team meeting.

I-prioritizeIssue: Indicates that prioritization has been requested for this issue.Issue: Indicates that prioritization has been requested for this issue.

regression-untriagedUntriaged performance or correctness regression.Untriaged performance or correctness regression.

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.

#140250 In rust-lang/rust;

· ijackson opened on Apr 24, 2025

Inference failure triggered by null proc macro application to totally unused and irrelevant struct

A-inferenceArea: Type inferenceArea: Type inference

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

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

E-needs-mcveCall for participation: This issue has a repro, but needs a Minimal Complete and Verifiable ExampleCall for participation: This issue has a repro, but needs a Minimal Complete and Verifiable Example

Status: Open.

Bug

#130480 In rust-lang/rust;

· ijackson opened on Sep 17, 2024

u64::saturating_div is useless

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

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.

#122821 In rust-lang/rust;

· ijackson opened on Mar 21, 2024

Weirdly placed derive attributes undesiredly accepted

A-proc-macrosArea: Procedural macrosArea: Procedural macros

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.

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.

Status: Open.

#119116 In rust-lang/rust;

· ijackson opened on Dec 19, 2023

impl for dyn Trait + deref to dyn Trait + Marker unhelpful messages

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

A-trait-systemArea: Trait systemArea: Trait system

D-terseDiagnostics: An error or lint that doesn't give enough information about the problem at hand.Diagnostics: An error or lint that doesn't give enough information about the problem at hand.

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.

#118875 In rust-lang/rust;

· ijackson opened on Dec 12, 2023

Stray "match" can result in bad syntax error messages

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.

#114265 In rust-lang/rust;

· ijackson opened on Jul 30, 2023

bizarre error message for one of the universal constructor syntaxes

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.

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.

#108224 In rust-lang/rust;

· ijackson opened on Feb 18, 2023

Bad diagnostics for erroneous use of array syntax around range in for

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.

#107233 In rust-lang/rust;

· ijackson opened on Jan 23, 2023

io::ErrorKind should suggest c&p current list of kinds into test cases

A-ioArea: `std::io`, `std::fs`, `std::net` and `std::path`Area: `std::io`, `std::fs`, `std::net` and `std::path`

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.

#89175 In rust-lang/rust;

· ijackson opened on Sep 22, 2021

Tracking Issue for io_error_more

A-error-handlingArea: Error handlingArea: Error handling

A-ioArea: `std::io`, `std::fs`, `std::net` and `std::path`Area: `std::io`, `std::fs`, `std::net` and `std::path`

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

disposition-mergeThis issue / PR is in PFCP or FCP with a disposition to merge it.This issue / PR is in PFCP or FCP with a disposition to merge it.

finished-final-comment-periodThe final comment period is finished for this PR / Issue.The final comment period is finished for this PR / Issue.

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.

#86442 In rust-lang/rust;

· ijackson opened on Jun 18, 2021

trait extension trait methods not always visible in rustdoc output

A-synthetic-implsArea: Synthetic impls, used by rustdoc to document auto traits and traits with blanket implsArea: Synthetic impls, used by rustdoc to document auto traits and traits with blanket impls

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

E-needs-mcveCall for participation: This issue has a repro, but needs a Minimal Complete and Verifiable ExampleCall for participation: This issue has a repro, but needs a Minimal Complete and Verifiable Example

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

Status: Open.

#85995 In rust-lang/rust;

· ijackson opened on Jun 4, 2021

Tracking Issue for ExitStatusError

A-error-handlingArea: Error handlingArea: Error handling

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

PG-error-handlingProject group: Error handling (https://github.com/rust-lang/project-error-handling)Project group: Error handling (https://github.com/rust-lang/project-error-handling)

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.

#84908 In rust-lang/rust;

· ijackson opened on May 4, 2021