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complexity: use <code>extend</code> instead of <code>append</code>

A-lintArea: New lintsArea: New lints

Status: Open.

#12277 In rust-lang/rust-clippy;

· wookietreiber opened on Feb 11, 2024

test <code>to_string_in_format_args_incremental</code> fails in a read-only working directory

Status: Closed (completed).

#11126 In rust-lang/rust-clippy;

· by Noratrieb was closed on Jun 5, 2025

Want to extend <code>clear_with_drain</code> to other types of containers

C-enhancementCategory: Enhancement of lints, like adding more cases or adding help messagesCategory: Enhancement of lints, like adding more cases or adding help messages

Status: Closed (completed).

#10572 In rust-lang/rust-clippy;

· by bluthej was closed on Apr 11, 2023

Document lint configuration values in Clippy's book

A-documentationArea: Adding or improving documentationArea: Adding or improving documentation

C-an-interesting-projectCategory: Interesting projects, that usually are more involved design/code wise.Category: Interesting projects, that usually are more involved design/code wise.

good first issueThese issues are a good way to get started with ClippyThese issues are a good way to get started with Clippy

Status: Closed (completed).

#9991 In rust-lang/rust-clippy;

· by xFrednet was closed on Jan 14, 2023

New lint: suggest transforming <code>[T, ...].into_iter().collect()</code> to <code>[T, ...].into()</code>

A-lintArea: New lintsArea: New lints

Status: Open.

#9524 In rust-lang/rust-clippy;

· strohel opened on Sep 23, 2022

Most commonly ignored lints on crates.io

A-categoryArea: Categorization of lintsArea: Categorization of lints

C-tracking-issueCategory: Tracking IssueCategory: Tracking Issue

S-needs-discussionStatus: Needs further discussion before merging or work can be startedStatus: Needs further discussion before merging or work can be started

Status: Closed (completed).

#7666 In rust-lang/rust-clippy;

· by dtolnay was closed on Oct 9, 2022

Suggest Iterator::count instead of collecting + len

C-enhancementCategory: Enhancement of lints, like adding more cases or adding help messagesCategory: Enhancement of lints, like adding more cases or adding help messages

E-mediumCall for participation: Medium difficulty level problem and requires some initial experience.Call for participation: Medium difficulty level problem and requires some initial experience.

Status: Closed (completed).

#7110 In rust-lang/rust-clippy;

· by Luro02 was closed on May 5, 2021

Tracking Issue for refactoring <code>types.rs</code>

C-tracking-issueCategory: Tracking IssueCategory: Tracking Issue

Status: Closed (completed).

#6724 In rust-lang/rust-clippy;

· by Y-Nak was closed on Mar 31, 2021

False positive for infinite_iter

C-bugCategory: Clippy is not doing the correct thingCategory: Clippy is not doing the correct thing

Status: Closed (completed).

#3538 In rust-lang/rust-clippy;

· by michael-p was closed on Jan 3, 2019

Suggest replacing 'iter().any(|x| x == y)' with 'contains' where appropriate

A-lintArea: New lintsArea: New lints

L-perfLint: Belongs in the perf lint groupLint: Belongs in the perf lint group

L-unnecessaryLint: Warn about unnecessary codeLint: Warn about unnecessary code

T-middleType: Probably requires verifiying typesType: Probably requires verifiying types

Status: Open.

#2534 In rust-lang/rust-clippy;

· TheIronBorn opened on Mar 15, 2018

clippy 0.0.139 failed to build with the latest nightly (258ae6dd9 2017-06-15)

Status: Closed (completed).

#1834 In rust-lang/rust-clippy;

· by kennytm was closed on Jun 16, 2017

linkedlist false positive

Status: Closed (completed).

#1800 In rust-lang/rust-clippy;

· by clarfonthey was closed on Jan 23, 2020