`unnecessary_lazy_evaluations`: lint `(Option/Result)::map_or_else` good first issue These issues are a good way to get started with Clippy C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages

#15829 opened Oct 6, 2025 by ada4a

4

Error applying suggestions (range underflow) C-bug Category: Clippy is not doing the correct thing good first issue These issues are a good way to get started with Clippy

#15787 opened Sep 29, 2025 by thomasqueirozb

7

Document `pub` functions in `clippy_utils` good first issue These issues are a good way to get started with Clippy

#15569 opened Aug 26, 2025 by samueltardieu

5

Move `excessive_nesting` to `pedantic` good first issue These issues are a good way to get started with Clippy A-category Area: Categorization of lints

#14923 opened May 30, 2025 by Centri3

2

Suggest `A && B` for `if A { B } else { false }` good first issue These issues are a good way to get started with Clippy A-lint Area: New lints

#14865 opened May 21, 2025 by scottmcm

5

lint idea: `useless_default_generic_parameters` good first issue These issues are a good way to get started with Clippy A-lint Area: New lints G-Rust-for-Linux Issues related to Rust-for-Linux wants and bugfixes

#14848 opened May 19, 2025 by BennoLossin

10

Suggestion for `useless_conversion` with `.into_iter()` could be better good first issue These issues are a good way to get started with Clippy C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages

#14847 opened May 19, 2025 by samueltardieu

3

`cargo clippy --fix` don't remove redundant `mut` good first issue These issues are a good way to get started with Clippy C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages S-fixed Status: Issues that got fixed, waiting to be closed as completed

#14617 opened Apr 15, 2025 by MCJOHN974

6

`cast_lossless` not triggered by `char as u32` C-bug Category: Clippy is not doing the correct thing good first issue These issues are a good way to get started with Clippy I-false-negative Issue: The lint should have been triggered on code, but wasn't

#14469 opened Mar 25, 2025 by BennoLossin

3

Refactor the `clippy_lints/src/strings.rs` file good first issue These issues are a good way to get started with Clippy E-help-wanted Call for participation: Help is requested to fix this issue.

#14253 opened Feb 19, 2025 by samueltardieu

14

`std_wildcard_imports` to lint against `use std::mod::*` good first issue These issues are a good way to get started with Clippy A-lint Area: New lints E-help-wanted Call for participation: Help is requested to fix this issue.

#13961 opened Jan 7, 2025 by tgross35

4

Deny `static mut` declarations entirely good first issue These issues are a good way to get started with Clippy A-lint Area: New lints

#12896 opened Jun 6, 2024 by pitaj

13

Add lints against more manual integer ops where direct methods exist good first issue These issues are a good way to get started with Clippy A-lint Area: New lints

#12894 opened Jun 6, 2024 by ivan-shrimp

4

Tracking Issue: lints that lint against `match` and `if-let`s should be more consistent good first issue These issues are a good way to get started with Clippy C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages C-tracking-issue Category: Tracking Issue

#12618 opened Apr 2, 2024 by J-ZhengLi

5

Ban Stacked `if`'s good first issue These issues are a good way to get started with Clippy A-lint Area: New lints

#12483 opened Mar 14, 2024 by bushrat011899

10

Configuring clippy in Cargo.toml missing from documentation? good first issue These issues are a good way to get started with Clippy A-documentation Area: Adding or improving documentation

#12164 opened Jan 18, 2024 by szabgab

9

unusual_byte_groupings triggers for binary literals C-bug Category: Clippy is not doing the correct thing good first issue These issues are a good way to get started with Clippy I-false-positive Issue: The lint was triggered on code it shouldn't have

#11749 opened Nov 2, 2023 by sdroege

7

`clippy::main_recursion` tests seem to be testing nothing anymore good first issue These issues are a good way to get started with Clippy L-tests Lint: Lints test code

#11034 opened Jun 26, 2023 by oli-obk

1

Have a lint against usize-to-u64 casts (or, against *all* integer casts) good first issue These issues are a good way to get started with Clippy A-lint Area: New lints

#9231 opened Jul 23, 2022 by RalfJung

23

blacklisted_name should not be triggered in tests C-bug Category: Clippy is not doing the correct thing good first issue These issues are a good way to get started with Clippy I-false-positive Issue: The lint was triggered on code it shouldn't have

#8986 opened Jun 11, 2022 by tamaroning

5

map_clone should not suggest copied() for MSRV < 1.36 C-bug Category: Clippy is not doing the correct thing good first issue These issues are a good way to get started with Clippy I-false-positive Issue: The lint was triggered on code it shouldn't have

#8623 opened Apr 2, 2022 by djc

11

`or_fun_call` isn't always a performance lint good first issue These issues are a good way to get started with Clippy A-category Area: Categorization of lints L-nursery Lint: Currently in the nursery group

#8574 opened Mar 22, 2022 by hrxi

11

Manual assert_eq! (enhance `if_then_panic`) good first issue These issues are a good way to get started with Clippy C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages

#7716 opened Sep 24, 2021 by camsteffen

7

Suggest usage of `array.as_slice()` (instead of `&array[..]`) and `array.as_mut_slice()` good first issue These issues are a good way to get started with Clippy A-lint Area: New lints L-restriction Lint: Belongs in the restriction lint group

#7633 opened Sep 4, 2021 by Luro02

6

`manual_flatten` false positives with reference slices C-bug Category: Clippy is not doing the correct thing good first issue These issues are a good way to get started with Clippy I-suggestion-causes-error Issue: The suggestions provided by this Lint cause an ICE/error when applied I-false-positive Issue: The lint was triggered on code it shouldn't have

#7514 opened Jul 29, 2021 by awused

3

website: cognitive complexity does insufficiently explain method good first issue These issues are a good way to get started with Clippy A-documentation Area: Adding or improving documentation

#7391 opened Jun 22, 2021 by matu3ba

3

New lint: deref coercions good first issue These issues are a good way to get started with Clippy A-lint Area: New lints L-restriction Lint: Belongs in the restriction lint group

#7104 opened Apr 17, 2021 by Aaron1011

6

suspicious-operation-groupings generates a false positive, suggested code doesn't even compile C-bug Category: Clippy is not doing the correct thing good first issue These issues are a good way to get started with Clippy I-suggestion-causes-error Issue: The suggestions provided by this Lint cause an ICE/error when applied I-false-positive Issue: The lint was triggered on code it shouldn't have

#7086 opened Apr 15, 2021 by ColinFinck

8

needless_range_loop produces code with different behaviour good first issue These issues are a good way to get started with Clippy A-documentation Area: Adding or improving documentation L-suggestion Lint: Improving, adding or fixing lint suggestions

#6930 opened Mar 18, 2021 by ChrisJefferson

13

Inconsistent underscores false positive? good first issue These issues are a good way to get started with Clippy C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages

#6836 opened Mar 3, 2021 by gilescope

3

assert_eq! with a literal float should probably fire float_cmp_const not float_cmp C-bug Category: Clippy is not doing the correct thing good first issue These issues are a good way to get started with Clippy I-false-positive Issue: The lint was triggered on code it shouldn't have

#6817 opened Mar 1, 2021 by CAD97

11

BufReader Stdin or StdinLock good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints L-perf Lint: Belongs in the perf lint group

#6755 opened Feb 17, 2021 by pickfire

12

Strange suggestion from suspicious_operation_groupings C-bug Category: Clippy is not doing the correct thing good first issue These issues are a good way to get started with Clippy I-false-positive Issue: The lint was triggered on code it shouldn't have

#6747 opened Feb 16, 2021 by djc

4

suspicious-operation-groupings false positive C-bug Category: Clippy is not doing the correct thing good first issue These issues are a good way to get started with Clippy I-false-positive Issue: The lint was triggered on code it shouldn't have

#6722 opened Feb 11, 2021 by emilk

10

Enhancements for `manual_flatten` good first issue These issues are a good way to get started with Clippy C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages L-style Lint: Belongs in the style lint group

#6676 opened Feb 5, 2021 by camsteffen

4

upper_case_acronyms complains about full-capital identifiers C-bug Category: Clippy is not doing the correct thing good first issue These issues are a good way to get started with Clippy I-false-positive Issue: The lint was triggered on code it shouldn't have

#6631 opened Jan 23, 2021 by matthiaskrgr

9

New lint: `windows_const` and `chunks_const` good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints L-perf Lint: Belongs in the perf lint group

#6580 opened Jan 12, 2021 by camsteffen

6

from_iter_instead_of_collect / needless_collect interaction questionable good first issue These issues are a good way to get started with Clippy C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages I-false-negative Issue: The lint should have been triggered on code, but wasn't L-nursery Lint: Currently in the nursery group

#6533 opened Jan 1, 2021 by matthiaskrgr

2

rc_buffer lint is dangerous as it changes runtime behaviour C-bug Category: Clippy is not doing the correct thing good first issue These issues are a good way to get started with Clippy L-suggestion Lint: Improving, adding or fixing lint suggestions

#6170 opened Oct 13, 2020 by sdroege

7

needless_collect: confusing suggestion & questionable transformation C-bug Category: Clippy is not doing the correct thing good first issue These issues are a good way to get started with Clippy E-medium Call for participation: Medium difficulty level problem and requires some initial experience. C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages L-suggestion Lint: Improving, adding or fixing lint suggestions I-false-positive Issue: The lint was triggered on code it shouldn't have L-nursery Lint: Currently in the nursery group

#6164 opened Oct 12, 2020 by roy-work

4

Manual Duration::{as_nanos,as_milis,as_secs_f64,as_secs_f32} implementation good first issue These issues are a good way to get started with Clippy C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages

#6068 opened Sep 20, 2020 by est31

4

Lint for `fold` closure that never moves the accumulator good first issue These issues are a good way to get started with Clippy A-lint Area: New lints L-perf Lint: Belongs in the perf lint group

#6053 opened Sep 16, 2020 by scottmcm

3

Suggest to replace impl Iterator return types with wrapper types good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints L-restriction Lint: Belongs in the restriction lint group

#5989 opened Aug 31, 2020 by Luro02

2

Lint for using the same expression for both length and capacity when constructing a vec/string good first issue These issues are a good way to get started with Clippy A-lint Area: New lints

#5955 opened Aug 24, 2020 by sgrif

7

Should match on bool with if-s on match arms be considered idiomatic? C-bug Category: Clippy is not doing the correct thing good first issue These issues are a good way to get started with Clippy

#5753 opened Jun 26, 2020 by eddyp

3

Split `missing_docs_in_private_items` into various lints good first issue These issues are a good way to get started with Clippy C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages

#5736 opened Jun 22, 2020 by jhpratt

7

Add an easy way to run clippy with high FPR / trivial lints disabled good first issue These issues are a good way to get started with Clippy C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages S-needs-discussion Status: Needs further discussion before merging or work can be started E-help-wanted Call for participation: Help is requested to fix this issue. A-category Area: Categorization of lints

#5537 opened Apr 27, 2020 by matklad

10

Improper error about else if collapse. good first issue These issues are a good way to get started with Clippy C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages

#4971 opened Dec 30, 2019 by wdanilo

5

New lint: Prefer mem::take over Vec::split_off(0) good first issue These issues are a good way to get started with Clippy A-lint Area: New lints S-needs-discussion Status: Needs further discussion before merging or work can be started

#4953 opened Dec 25, 2019 by tesuji

4

New lint: Use `Into`/`TryInto` in bounds as opposed to `From`/`TryFrom` good first issue These issues are a good way to get started with Clippy A-lint Area: New lints L-style Lint: Belongs in the style lint group

#4894 opened Dec 10, 2019 by Kixunil

29

Suggestion: borrowing a RefCell in funarg position good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints

#4632 opened Oct 4, 2019 by lopopolo

2

New lint: `while let Some(&x) = slice.iter().next()` is infinite loop good first issue These issues are a good way to get started with Clippy A-lint Area: New lints L-correctness Lint: Belongs in the correctness lint group L-suggestion Lint: Improving, adding or fixing lint suggestions

#4554 opened Sep 19, 2019 by tesuji

12

Support for upcoming `param_attrs` feature good first issue These issues are a good way to get started with Clippy C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages S-needs-discussion Status: Needs further discussion before merging or work can be started E-needs-test Call for participation: writing tests

#4474 opened Aug 30, 2019 by phansch

Extract commonly used visitors to utils good first issue These issues are a good way to get started with Clippy C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages

#4413 opened Aug 19, 2019 by flip1995

3

False positive for inherent_to_string_shadow_display? C-bug Category: Clippy is not doing the correct thing good first issue These issues are a good way to get started with Clippy C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages L-suggestion Lint: Improving, adding or fixing lint suggestions I-false-positive Issue: The lint was triggered on code it shouldn't have

#4396 opened Aug 16, 2019 by huxi

16

False positive for boxed local with `wasm_bindgen` C-bug Category: Clippy is not doing the correct thing good first issue These issues are a good way to get started with Clippy I-false-positive Issue: The lint was triggered on code it shouldn't have

#4351 opened Aug 7, 2019 by rivertam

14

New lint: wildcard pattern in let good first issue These issues are a good way to get started with Clippy A-lint Area: New lints L-restriction Lint: Belongs in the restriction lint group

#4090 opened May 13, 2019 by Vlad-Shcherbina

9

Lint `static mut FOO: T` where `T` has a safe counterpart good first issue These issues are a good way to get started with Clippy A-lint Area: New lints L-correctness Lint: Belongs in the correctness lint group

#4070 opened May 8, 2019 by oli-obk

5

Lint suggesting from_fn instead of while let Some(x) good first issue These issues are a good way to get started with Clippy A-lint Area: New lints L-style Lint: Belongs in the style lint group L-suggestion Lint: Improving, adding or fixing lint suggestions

#3940 opened Apr 11, 2019 by joshtriplett

1

Add utils helper for filtering out type/lifetime parameters on generics good first issue These issues are a good way to get started with Clippy C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages

#3787 opened Feb 19, 2019 by Manishearth

4

if_same_then_else Should not warn for `else if` blocks. good first issue These issues are a good way to get started with Clippy S-needs-discussion Status: Needs further discussion before merging or work can be started I-false-positive Issue: The lint was triggered on code it shouldn't have

#3770 opened Feb 16, 2019 by kevincox

29

FR: redundant_field_names should distinguish between all and some fields matching good first issue These issues are a good way to get started with Clippy C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages L-style Lint: Belongs in the style lint group

#3422 opened Nov 10, 2018 by taralx

1

Lint for unused arguments starting with a _ good first issue These issues are a good way to get started with Clippy A-lint Area: New lints L-style Lint: Belongs in the style lint group

#3219 opened Sep 25, 2018 by yaahc

11

Lint against calling intrinsics that have stable or safe wrappers good first issue These issues are a good way to get started with Clippy A-lint Area: New lints L-unnecessary Lint: Warn about unnecessary code L-suggestion Lint: Improving, adding or fixing lint suggestions

#2997 opened Aug 3, 2018 by dtolnay

8

unused_lifetime false positive good first issue These issues are a good way to get started with Clippy C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages

#2678 opened Apr 17, 2018 by YaLTeR

11

Politely mention that `Box<&T>` is almost the most useless type you can have good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints

#2394 opened Jan 23, 2018 by oli-obk

25

False positives selecting system allocator C-bug Category: Clippy is not doing the correct thing good first issue These issues are a good way to get started with Clippy T-macros Type: Issues with macros and macro expansion I-false-positive Issue: The lint was triggered on code it shouldn't have

#2373 opened Jan 18, 2018 by birkenfeld

3

Catch use of PhantomData that requires T: Sized good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types

#2308 opened Dec 27, 2017 by dtolnay

4

Iterators: suggest `position()` instead of `enumerate() + find() + .0` good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types

#2282 opened Dec 20, 2017 by devonhollowood

5

Warn if file contains large number of items good first issue These issues are a good way to get started with Clippy T-AST Type: Requires working with the AST A-lint Area: New lints L-guidelines Lint: Related to the Rust API Guidelines

#2261 opened Dec 6, 2017 by clarfonthey

6

`use_debug` lint should not trigger on `debug!()` log macro calls good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages

#2132 opened Oct 12, 2017 by hcpl

7

large_enum_variant triggered in error-chain macro has unhelpful help message good first issue These issues are a good way to get started with Clippy E-medium Call for participation: Medium difficulty level problem and requires some initial experience. T-middle Type: Probably requires verifiying types C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages

#2121 opened Oct 9, 2017 by killercup

8

Lint calling methods that are redundant to deref good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints L-unnecessary Lint: Warn about unnecessary code

#2094 opened Sep 28, 2017 by clarfonthey

2

lint useless operands in binary operations good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints L-unnecessary Lint: Warn about unnecessary code

#2086 opened Sep 26, 2017 by oli-obk

3

New lint: clone on arguments taken by reference good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints L-unnecessary Lint: Warn about unnecessary code

#2074 opened Sep 19, 2017 by mathstuf

3

lint variable assignments that could be part of a method/field chain good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints L-unnecessary Lint: Warn about unnecessary code

#2035 opened Sep 9, 2017 by oli-obk

6

extend transmute_ptr_to_ref to detect transmuting newtypes around ptrs good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages L-style Lint: Belongs in the style lint group

#1966 opened Aug 18, 2017 by oli-obk

1

Lint for likely-malformed reference style links good first issue These issues are a good way to get started with Clippy T-AST Type: Requires working with the AST A-lint Area: New lints A-documentation Area: Adding or improving documentation L-correctness Lint: Belongs in the correctness lint group

#1952 opened Aug 13, 2017 by CAD97

4

Lint request: Prevent lifetimes that are only used for function output good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints S-needs-discussion Status: Needs further discussion before merging or work can be started L-correctness Lint: Belongs in the correctness lint group

#1874 opened Jul 5, 2017 by sugar700

9

Extensions to should_assert_eq good first issue These issues are a good way to get started with Clippy C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages

#1810 opened Jun 3, 2017 by clarfonthey

Rust API Guidelines: `Debug` representation is never empty good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints L-correctness Lint: Belongs in the correctness lint group L-guidelines Lint: Related to the Rust API Guidelines

#1796 opened May 27, 2017 by mcarton

5

Rust API Guideline: Function docs include error conditions in "Errors" section good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints L-guidelines Lint: Related to the Rust API Guidelines

#1790 opened May 27, 2017 by mcarton

1

Lint bit operations with decimal constants good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints L-style Lint: Belongs in the style lint group

#1775 opened May 22, 2017 by clarfonthey

2

transmute_ptr_to_ref suggestion doesn't with some outer expression types C-bug Category: Clippy is not doing the correct thing good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types

#1754 opened May 12, 2017 by oli-obk

1

Lint for Debug formatting in Display implementations good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages L-style Lint: Belongs in the style lint group

#1713 opened May 2, 2017 by clarfonthey

3

Expand float_cmp to structs with PartialEq good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages L-correctness Lint: Belongs in the correctness lint group

#1685 opened Apr 17, 2017 by RazrFalcon

5

New Lint: No recursion without tail calls good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints L-perf Lint: Belongs in the perf lint group

#1678 opened Apr 15, 2017 by Evrey

7

Two suggestions for more DRY code good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints L-style Lint: Belongs in the style lint group

#1674 opened Apr 14, 2017 by leonardo-m

3

Lint `set_*` and `get_*` methods that do nothing but access the field good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints L-style Lint: Belongs in the style lint group

#1673 opened Apr 12, 2017 by oli-obk

18

don't fold(..) an Option when you can map_or(..) good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints L-style Lint: Belongs in the style lint group

#1658 opened Apr 3, 2017 by llogiq

2

Lint `let mut x = x;` where `x` is a function argument good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints L-unnecessary Lint: Warn about unnecessary code

#1657 opened Apr 3, 2017 by oli-obk

4

detect #[allow(warnings)] and issue an unsilenceable warning good first issue These issues are a good way to get started with Clippy T-AST Type: Requires working with the AST S-needs-discussion Status: Needs further discussion before merging or work can be started

#1648 opened Mar 31, 2017 by oli-obk

1

Analyze HIC++ and figure out if we are missing some important lints C-question Category: Questions good first issue These issues are a good way to get started with Clippy S-needs-discussion Status: Needs further discussion before merging or work can be started C-an-interesting-project Category: Interesting projects, that usually are more involved design/code wise.

#1643 opened Mar 29, 2017 by oli-obk

4

Warn about uses of Rust types where a C (raw) type is expected good first issue These issues are a good way to get started with Clippy E-hard Call for participation: This a hard problem and requires more experience or effort to work on T-AST Type: Requires working with the AST A-lint Area: New lints L-correctness Lint: Belongs in the correctness lint group

#1631 opened Mar 20, 2017 by pgerber

4

Lint for denylisted-strings, similar to denylisted-names good first issue These issues are a good way to get started with Clippy T-AST Type: Requires working with the AST A-lint Area: New lints

#1624 opened Mar 15, 2017 by clarfonthey

7

should_implement_trait should include ToOwned, FromStr good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages L-style Lint: Belongs in the style lint group

#1600 opened Mar 4, 2017 by clarfonthey

1

Always true expressions in if expressions good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints L-correctness Lint: Belongs in the correctness lint group

#1593 opened Mar 3, 2017 by leonardo-m

3

Lint functions taking references as arguments but only use them to create an owned value good first issue These issues are a good way to get started with Clippy E-hard Call for participation: This a hard problem and requires more experience or effort to work on T-middle Type: Probably requires verifiying types A-lint Area: New lints L-unnecessary Lint: Warn about unnecessary code

#1563 opened Feb 21, 2017 by oli-obk

3

Lint for Iterator + Copy good first issue These issues are a good way to get started with Clippy E-medium Call for participation: Medium difficulty level problem and requires some initial experience. A-lint Area: New lints L-correctness Lint: Belongs in the correctness lint group

#1534 opened Feb 13, 2017 by sinkuu

1

Lint unwrap in drop impls good first issue These issues are a good way to get started with Clippy E-hard Call for participation: This a hard problem and requires more experience or effort to work on T-middle Type: Probably requires verifiying types A-lint Area: New lints L-correctness Lint: Belongs in the correctness lint group

#1523 opened Feb 8, 2017 by killercup

2

Lint on method/struct fields sharing the same name good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints L-style Lint: Belongs in the style lint group

#1481 opened Jan 27, 2017 by gnzlbg

6

improve suggestions around `&*` and don't add parenthesis good first issue These issues are a good way to get started with Clippy C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages L-suggestion Lint: Improving, adding or fixing lint suggestions

#1431 opened Jan 10, 2017 by oli-obk

2

useless op on lhs of integer division or modulo good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints L-correctness Lint: Belongs in the correctness lint group L-unnecessary Lint: Warn about unnecessary code

#1324 opened Nov 7, 2016 by oli-obk

1

lint long chains of into/float additions/multiplications good first issue These issues are a good way to get started with Clippy T-AST Type: Requires working with the AST A-lint Area: New lints L-perf Lint: Belongs in the perf lint group

#1243 opened Sep 25, 2016 by llogiq

10

Lint to warn about str::as_ptr() usage in ffi call good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints L-correctness Lint: Belongs in the correctness lint group

#1236 opened Sep 19, 2016 by antoyo

Lint: Implicit Deref good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints

#1225 opened Sep 14, 2016 by Havvy

3

lint usage of struct constructors when new/from method is available good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints L-style Lint: Belongs in the style lint group

#1216 opened Sep 5, 2016 by oli-obk

7

Suggest `v.trailing_zeros() == n` over `(v & (1 << n)) != 0` good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints L-style Lint: Belongs in the style lint group

#1195 opened Aug 27, 2016 by mcarton

4

doc_markdown should ignore things which just contain acronyms good first issue These issues are a good way to get started with Clippy C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages

#1136 opened Aug 5, 2016 by Manishearth

5

`bool_comparison` should not fire when testing for false good first issue These issues are a good way to get started with Clippy A-lint Area: New lints S-needs-discussion Status: Needs further discussion before merging or work can be started L-style Lint: Belongs in the style lint group

#1043 opened Jun 26, 2016 by svmnotn

4

doc_markdown a bit too eager good first issue These issues are a good way to get started with Clippy S-needs-discussion Status: Needs further discussion before merging or work can be started

#902 opened May 5, 2016 by Keats

10

lint String::as_str() good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints

#874 opened Apr 23, 2016 by llogiq

9

Lint x != _ || x != _ good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints L-correctness Lint: Belongs in the correctness lint group

#853 opened Apr 12, 2016 by llogiq

3

improve collapsible if in complex cases with same expressions good first issue These issues are a good way to get started with Clippy C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages A-lint Area: New lints

#812 opened Mar 30, 2016 by oli-obk

1

Lint non-expressive variable names good first issue These issues are a good way to get started with Clippy T-AST Type: Requires working with the AST T-middle Type: Probably requires verifiying types A-lint Area: New lints L-style Lint: Belongs in the style lint group

#644 opened Feb 9, 2016 by killercup

8

lint: transmuting known null pointer to ref good first issue These issues are a good way to get started with Clippy T-AST Type: Requires working with the AST A-lint Area: New lints

#628 opened Feb 6, 2016 by llogiq

16

lint: assertion-less #[test] function good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints L-tests Lint: Lints test code

#626 opened Feb 6, 2016 by llogiq

2

Lint `unsigned - other_unsigned > 0` good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints S-needs-discussion Status: Needs further discussion before merging or work can be started L-correctness Lint: Belongs in the correctness lint group

#588 opened Jan 29, 2016 by fhartwig

5

[lint idea] dangerous transmutes good first issue These issues are a good way to get started with Clippy T-middle Type: Probably requires verifiying types A-lint Area: New lints

#546 opened Jan 13, 2016 by durka

11

Restrict let_and_return if the let binding is large good first issue These issues are a good way to get started with Clippy S-needs-discussion Status: Needs further discussion before merging or work can be started

#420 opened Oct 28, 2015 by mrmonday

5

Lint: Multiple inherent impls good first issue These issues are a good way to get started with Clippy T-AST Type: Requires working with the AST A-lint Area: New lints

#414 opened Oct 25, 2015 by llogiq

2

Shadowing of types via Generic Parameter good first issue These issues are a good way to get started with Clippy A-lint Area: New lints

#380 opened Oct 12, 2015 by Havvy

2

Catch transmuting Option<&T> to Option<&mut T> good first issue These issues are a good way to get started with Clippy E-medium Call for participation: Medium difficulty level problem and requires some initial experience. T-middle Type: Probably requires verifiying types C-enhancement Category: Enhancement of lints, like adding more cases or adding help messages

#372 opened Oct 8, 2015 by fhartwig

2

Result depending on execution order good first issue These issues are a good way to get started with Clippy E-medium Call for participation: Medium difficulty level problem and requires some initial experience. T-AST Type: Requires working with the AST A-lint Area: New lints T-MIR Type: This lint will require working with the MIR

#277 opened Sep 2, 2015 by llogiq

5

use statements anywhere but top of module good first issue These issues are a good way to get started with Clippy T-AST Type: Requires working with the AST A-lint Area: New lints

#259 opened Aug 30, 2015 by llogiq

21