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bors e2753f9a7b Auto merge of #6662 - Y-Nak:default-numeric-fallback, r=flip1995 
New lint: default_numeric_fallback

fixes #6064
r? `@flip1995`

As we discussed in [here](https://rust-lang.zulipchat.com/#narrow/stream/257328-clippy/topic/Issue.20.236064/near/224647188) and [here](https://rust-lang.zulipchat.com/#narrow/stream/257328-clippy/topic/Issue.20clippy.236064/near/224746333),   I start implementing this lint from the strictest version.
In this PR, I'll allow the below two cases to pass the lint to reduce FPs.

1. Appearances of unsuffixed numeric literals in `Local` if `Local` has a type annotation, for example:
```rust
// Good.
let x: i32 = 1;

// Also good.
let x: (i32, i32) = if cond {
   (1, 2)
} else {
   (2, 3)
};
```

2. Appearances of unsuffixed numeric literals in args of `Call` or `MethodCall`  if corresponding arguments of their signature have concrete types, for example:
```rust
fn foo_mono(x: i32) -> i32 {
    x
}

fn foo_poly<T>(t: T) -> t {
    t
}

// Good.
let x = foo_mono(13);

// Still bad.
let x: i32 = foo_poly(13);
```

changelog: Added restriction lint: `default_numeric_fallback`
2021-02-16 09:58:49 +00:00

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# Changelog
All notable changes to this project will be documented in this file.
See [Changelog Update](doc/changelog_update.md) if you want to update this
document.
## Unreleased / In Rust Nightly
[3e41797...master](https://github.com/rust-lang/rust-clippy/compare/3e41797...master)
## Rust 1.51
Current beta, release 2021-03-25
[4911ab1...3e41797](https://github.com/rust-lang/rust-clippy/compare/4911ab1...3e41797)
### New Lints
* [`upper_case_acronyms`]
[#6475](https://github.com/rust-lang/rust-clippy/pull/6475)
* [`from_over_into`] [#6476](https://github.com/rust-lang/rust-clippy/pull/6476)
* [`case_sensitive_file_extension_comparisons`]
[#6500](https://github.com/rust-lang/rust-clippy/pull/6500)
* [`needless_question_mark`]
[#6507](https://github.com/rust-lang/rust-clippy/pull/6507)
* [`missing_panics_doc`]
[#6523](https://github.com/rust-lang/rust-clippy/pull/6523)
* [`redundant_slicing`]
[#6528](https://github.com/rust-lang/rust-clippy/pull/6528)
* [`vec_init_then_push`]
[#6538](https://github.com/rust-lang/rust-clippy/pull/6538)
* [`ptr_as_ptr`] [#6542](https://github.com/rust-lang/rust-clippy/pull/6542)
* [`collapsible_else_if`] (split out from `collapsible_if`)
[#6544](https://github.com/rust-lang/rust-clippy/pull/6544)
* [`inspect_for_each`] [#6577](https://github.com/rust-lang/rust-clippy/pull/6577)
* [`manual_filter_map`]
[#6591](https://github.com/rust-lang/rust-clippy/pull/6591)
* [`exhaustive_enums`]
[#6617](https://github.com/rust-lang/rust-clippy/pull/6617)
* [`exhaustive_structs`]
[#6617](https://github.com/rust-lang/rust-clippy/pull/6617)
### Moves and Deprecations
* Replace [`find_map`] with [`manual_find_map`]
[#6591](https://github.com/rust-lang/rust-clippy/pull/6591)
* [`unknown_clippy_lints`] Now integrated in the `unknown_lints` rustc lint
[#6653](https://github.com/rust-lang/rust-clippy/pull/6653)
### Enhancements
* [`ptr_arg`] Now also suggests to use `&Path` instead of `&PathBuf`
[#6506](https://github.com/rust-lang/rust-clippy/pull/6506)
* [`cast_ptr_alignment`] Also lint when the `pointer::cast` method is used
[#6557](https://github.com/rust-lang/rust-clippy/pull/6557)
* [`collapsible_match`] Now also deals with `&` and `*` operators in the `match`
scrutinee [#6619](https://github.com/rust-lang/rust-clippy/pull/6619)
### False Positive Fixes
* [`similar_names`] Ignore underscore prefixed names
[#6403](https://github.com/rust-lang/rust-clippy/pull/6403)
* [`print_literal`] and [`write_literal`] No longer lint numeric literals
[#6408](https://github.com/rust-lang/rust-clippy/pull/6408)
* [`large_enum_variant`] No longer lints in external macros
[#6485](https://github.com/rust-lang/rust-clippy/pull/6485)
* [`empty_enum`] Only lint if `never_type` feature is enabled
[#6513](https://github.com/rust-lang/rust-clippy/pull/6513)
* [`field_reassign_with_default`] No longer lints in macros
[#6553](https://github.com/rust-lang/rust-clippy/pull/6553)
* [`size_of_in_element_count`] No longer lints when dividing by element size
[#6578](https://github.com/rust-lang/rust-clippy/pull/6578)
* [`needless_return`] No longer lints in macros
[#6586](https://github.com/rust-lang/rust-clippy/pull/6586)
* [`match_overlapping_arm`] No longer lint when first arm is completely included
in second arm [#6603](https://github.com/rust-lang/rust-clippy/pull/6603)
* [`doc_markdown`] Add `WebGL` to the default configuration as an allowed
identifier [#6605](https://github.com/rust-lang/rust-clippy/pull/6605)
### Suggestion Fixes/Improvements
* [`field_reassign_with_default`] Don't expand macro in lint suggestion
[#6531](https://github.com/rust-lang/rust-clippy/pull/6531)
* [`match_like_matches_macro`] Strip references in suggestion
[#6532](https://github.com/rust-lang/rust-clippy/pull/6532)
* [`single_match`] Suggest `if` over `if let` when possible
[#6574](https://github.com/rust-lang/rust-clippy/pull/6574)
* [`ref_in_deref`] Use parentheses correctly in suggestion
[#6609](https://github.com/rust-lang/rust-clippy/pull/6609)
* [`stable_sort_primitive`] Clarify error message
[#6611](https://github.com/rust-lang/rust-clippy/pull/6611)
### ICE Fixes
* [`zero_sized_map_values`]
[#6582](https://github.com/rust-lang/rust-clippy/pull/6582)
### Documentation Improvements
* Improve search performance on the Clippy website and make it possible to
directly search for lints on the GitHub issue tracker
[#6483](https://github.com/rust-lang/rust-clippy/pull/6483)
* Clean up `README.md` by removing outdated paragraph
[#6488](https://github.com/rust-lang/rust-clippy/pull/6488)
* [`await_holding_refcell_ref`] and [`await_holding_lock`]
[#6585](https://github.com/rust-lang/rust-clippy/pull/6585)
* [`as_conversions`] [#6608](https://github.com/rust-lang/rust-clippy/pull/6608)
### Others
* Clippy now has a [Roadmap] for 2021. If you like to get involved in a bigger
project, take a look at the [Roadmap project page]. All issues listed there
are actively mentored
[#6462](https://github.com/rust-lang/rust-clippy/pull/6462)
* The Clippy version number now corresponds to the Rust version number
[#6526](https://github.com/rust-lang/rust-clippy/pull/6526)
* Fix oversight which caused Clippy to lint deps in some environments, where
`CLIPPY_TESTS=true` was set somewhere
[#6575](https://github.com/rust-lang/rust-clippy/pull/6575)
* Add `cargo dev-lintcheck` tool to the Clippy Dev Tool
[#6469](https://github.com/rust-lang/rust-clippy/pull/6469)
[Roadmap]: https://github.com/rust-lang/rust-clippy/blob/master/doc/roadmap-2021.md
[Roadmap project page]: https://github.com/rust-lang/rust-clippy/projects/3
## Rust 1.50
Current stable, released 2021-02-11
[b20d4c1...4bd77a1](https://github.com/rust-lang/rust-clippy/compare/b20d4c1...4bd77a1)
### New Lints
* [`suspicious_operation_groupings`] [#6086](https://github.com/rust-lang/rust-clippy/pull/6086)
* [`size_of_in_element_count`] [#6394](https://github.com/rust-lang/rust-clippy/pull/6394)
* [`unnecessary_wraps`] [#6070](https://github.com/rust-lang/rust-clippy/pull/6070)
* [`let_underscore_drop`] [#6305](https://github.com/rust-lang/rust-clippy/pull/6305)
* [`collapsible_match`] [#6402](https://github.com/rust-lang/rust-clippy/pull/6402)
* [`redundant_else`] [#6330](https://github.com/rust-lang/rust-clippy/pull/6330)
* [`zero_sized_map_values`] [#6218](https://github.com/rust-lang/rust-clippy/pull/6218)
* [`print_stderr`] [#6367](https://github.com/rust-lang/rust-clippy/pull/6367)
* [`string_from_utf8_as_bytes`] [#6134](https://github.com/rust-lang/rust-clippy/pull/6134)
### Moves and Deprecations
* Previously deprecated [`str_to_string`] and [`string_to_string`] have been un-deprecated
as `restriction` lints [#6333](https://github.com/rust-lang/rust-clippy/pull/6333)
* Deprecate [`panic_params`] lint. This is now available in rustc as `panic_fmt`
[#6351](https://github.com/rust-lang/rust-clippy/pull/6351)
* Move [`map_err_ignore`] to `restriction`
[#6416](https://github.com/rust-lang/rust-clippy/pull/6416)
* Move [`await_holding_refcell_ref`] to `pedantic`
[#6354](https://github.com/rust-lang/rust-clippy/pull/6354)
* Move [`await_holding_lock`] to `pedantic`
[#6354](https://github.com/rust-lang/rust-clippy/pull/6354)
### Enhancements
* Add the `unreadable-literal-lint-fractions` configuration to disable
the `unreadable_literal` lint for fractions
[#6421](https://github.com/rust-lang/rust-clippy/pull/6421)
* [`clone_on_copy`]: Now shows the type in the lint message
[#6443](https://github.com/rust-lang/rust-clippy/pull/6443)
* [`redundant_pattern_matching`]: Now also lints on `std::task::Poll`
[#6339](https://github.com/rust-lang/rust-clippy/pull/6339)
* [`redundant_pattern_matching`]: Additionally also lints on `std::net::IpAddr`
[#6377](https://github.com/rust-lang/rust-clippy/pull/6377)
* [`search_is_some`]: Now suggests `contains` instead of `find(foo).is_some()`
[#6119](https://github.com/rust-lang/rust-clippy/pull/6119)
* [`clone_double_ref`]: Now prints the reference type in the lint message
[#6442](https://github.com/rust-lang/rust-clippy/pull/6442)
* [`modulo_one`]: Now also lints on -1.
[#6360](https://github.com/rust-lang/rust-clippy/pull/6360)
* [`empty_loop`]: Now lints no_std crates, too
[#6205](https://github.com/rust-lang/rust-clippy/pull/6205)
* [`or_fun_call`]: Now also lints when indexing `HashMap` or `BTreeMap`
[#6267](https://github.com/rust-lang/rust-clippy/pull/6267)
* [`wrong_self_convention`]: Now also lints in trait definitions
[#6316](https://github.com/rust-lang/rust-clippy/pull/6316)
* [`needless_borrow`]: Print the type in the lint message
[#6449](https://github.com/rust-lang/rust-clippy/pull/6449)
[msrv_readme]: https://github.com/rust-lang/rust-clippy#specifying-the-minimum-supported-rust-version
### False Positive Fixes
* [`manual_range_contains`]: No longer lints in `const fn`
[#6382](https://github.com/rust-lang/rust-clippy/pull/6382)
* [`unnecessary_lazy_evaluations`]: No longer lints if closure argument is used
[#6370](https://github.com/rust-lang/rust-clippy/pull/6370)
* [`match_single_binding`]: Now ignores cases with `#[cfg()]` macros
[#6435](https://github.com/rust-lang/rust-clippy/pull/6435)
* [`match_like_matches_macro`]: No longer lints on arms with attributes
[#6290](https://github.com/rust-lang/rust-clippy/pull/6290)
* [`map_clone`]: No longer lints with deref and clone
[#6269](https://github.com/rust-lang/rust-clippy/pull/6269)
* [`map_clone`]: No longer lints in the case of &mut
[#6301](https://github.com/rust-lang/rust-clippy/pull/6301)
* [`needless_update`]: Now ignores `non_exhaustive` structs
[#6464](https://github.com/rust-lang/rust-clippy/pull/6464)
* [`needless_collect`]: No longer lints when a collect is needed multiple times
[#6313](https://github.com/rust-lang/rust-clippy/pull/6313)
* [`unnecessary_cast`] No longer lints cfg-dependent types
[#6369](https://github.com/rust-lang/rust-clippy/pull/6369)
* [`declare_interior_mutable_const`] and [`borrow_interior_mutable_const`]:
Both now ignore enums with frozen variants
[#6110](https://github.com/rust-lang/rust-clippy/pull/6110)
* [`field_reassign_with_default`] No longer lint for private fields
[#6537](https://github.com/rust-lang/rust-clippy/pull/6537)
### Suggestion Fixes/Improvements
* [`vec_box`]: Provide correct type scope suggestion
[#6271](https://github.com/rust-lang/rust-clippy/pull/6271)
* [`manual_range_contains`]: Give correct suggestion when using floats
[#6320](https://github.com/rust-lang/rust-clippy/pull/6320)
* [`unnecessary_lazy_evaluations`]: Don't always mark suggestion as MachineApplicable
[#6272](https://github.com/rust-lang/rust-clippy/pull/6272)
* [`manual_async_fn`]: Improve suggestion formatting
[#6294](https://github.com/rust-lang/rust-clippy/pull/6294)
* [`unnecessary_cast`]: Fix incorrectly formatted float literal suggestion
[#6362](https://github.com/rust-lang/rust-clippy/pull/6362)
### ICE Fixes
* Fix a crash in [`from_iter_instead_of_collect`]
[#6304](https://github.com/rust-lang/rust-clippy/pull/6304)
* Fix a silent crash when parsing doc comments in [`needless_doctest_main`]
[#6458](https://github.com/rust-lang/rust-clippy/pull/6458)
### Documentation Improvements
* The lint website search has been improved ([#6477](https://github.com/rust-lang/rust-clippy/pull/6477)):
* Searching for lints with dashes and spaces is possible now. For example
`missing-errors-doc` and `missing errors doc` are now valid aliases for lint names
* Improved fuzzy search in lint descriptions
* Various README improvements
[#6287](https://github.com/rust-lang/rust-clippy/pull/6287)
* Add known problems to [`comparison_chain`] documentation
[#6390](https://github.com/rust-lang/rust-clippy/pull/6390)
* Fix example used in [`cargo_common_metadata`]
[#6293](https://github.com/rust-lang/rust-clippy/pull/6293)
* Improve [`map_clone`] documentation
[#6340](https://github.com/rust-lang/rust-clippy/pull/6340)
### Others
* You can now tell Clippy about the MSRV your project supports. Please refer to
the specific README section to learn more about MSRV support [here][msrv_readme]
[#6201](https://github.com/rust-lang/rust-clippy/pull/6201)
* Add `--no-deps` option to avoid running on path dependencies in workspaces
[#6188](https://github.com/rust-lang/rust-clippy/pull/6188)
## Rust 1.49
Released 2020-12-31
[e636b88...b20d4c1](https://github.com/rust-lang/rust-clippy/compare/e636b88...b20d4c1)
### New Lints
* [`field_reassign_with_default`] [#5911](https://github.com/rust-lang/rust-clippy/pull/5911)
* [`await_holding_refcell_ref`] [#6029](https://github.com/rust-lang/rust-clippy/pull/6029)
* [`disallowed_method`] [#6081](https://github.com/rust-lang/rust-clippy/pull/6081)
* [`inline_asm_x86_att_syntax`] [#6092](https://github.com/rust-lang/rust-clippy/pull/6092)
* [`inline_asm_x86_intel_syntax`] [#6092](https://github.com/rust-lang/rust-clippy/pull/6092)
* [`from_iter_instead_of_collect`] [#6101](https://github.com/rust-lang/rust-clippy/pull/6101)
* [`mut_mutex_lock`] [#6103](https://github.com/rust-lang/rust-clippy/pull/6103)
* [`single_element_loop`] [#6109](https://github.com/rust-lang/rust-clippy/pull/6109)
* [`manual_unwrap_or`] [#6123](https://github.com/rust-lang/rust-clippy/pull/6123)
* [`large_types_passed_by_value`] [#6135](https://github.com/rust-lang/rust-clippy/pull/6135)
* [`result_unit_err`] [#6157](https://github.com/rust-lang/rust-clippy/pull/6157)
* [`ref_option_ref`] [#6165](https://github.com/rust-lang/rust-clippy/pull/6165)
* [`manual_range_contains`] [#6177](https://github.com/rust-lang/rust-clippy/pull/6177)
* [`unusual_byte_groupings`] [#6183](https://github.com/rust-lang/rust-clippy/pull/6183)
* [`comparison_to_empty`] [#6226](https://github.com/rust-lang/rust-clippy/pull/6226)
* [`map_collect_result_unit`] [#6227](https://github.com/rust-lang/rust-clippy/pull/6227)
* [`manual_ok_or`] [#6233](https://github.com/rust-lang/rust-clippy/pull/6233)
### Moves and Deprecations
* Rename `single_char_push_str` to [`single_char_add_str`]
[#6037](https://github.com/rust-lang/rust-clippy/pull/6037)
* Rename `zero_width_space` to [`invisible_characters`]
[#6105](https://github.com/rust-lang/rust-clippy/pull/6105)
* Deprecate [`drop_bounds`] (uplifted)
[#6111](https://github.com/rust-lang/rust-clippy/pull/6111)
* Move [`string_lit_as_bytes`] to `nursery`
[#6117](https://github.com/rust-lang/rust-clippy/pull/6117)
* Move [`rc_buffer`] to `restriction`
[#6128](https://github.com/rust-lang/rust-clippy/pull/6128)
### Enhancements
* [`manual_memcpy`]: Also lint when there are loop counters (and produce a
reliable suggestion)
[#5727](https://github.com/rust-lang/rust-clippy/pull/5727)
* [`single_char_add_str`]: Also lint on `String::insert_str`
[#6037](https://github.com/rust-lang/rust-clippy/pull/6037)
* [`invisible_characters`]: Also lint the characters `\u{AD}` and `\u{2060}`
[#6105](https://github.com/rust-lang/rust-clippy/pull/6105)
* [`eq_op`]: Also lint on the `assert_*!` macro family
[#6167](https://github.com/rust-lang/rust-clippy/pull/6167)
* [`items_after_statements`]: Also lint in local macro expansions
[#6176](https://github.com/rust-lang/rust-clippy/pull/6176)
* [`unnecessary_cast`]: Also lint casts on integer and float literals
[#6187](https://github.com/rust-lang/rust-clippy/pull/6187)
* [`manual_unwrap_or`]: Also lint `Result::unwrap_or`
[#6190](https://github.com/rust-lang/rust-clippy/pull/6190)
* [`match_like_matches_macro`]: Also lint when `match` has more than two arms
[#6216](https://github.com/rust-lang/rust-clippy/pull/6216)
* [`integer_arithmetic`]: Better handle `/` an `%` operators
[#6229](https://github.com/rust-lang/rust-clippy/pull/6229)
### False Positive Fixes
* [`needless_lifetimes`]: Bail out if the function has a `where` clause with the
lifetime [#5978](https://github.com/rust-lang/rust-clippy/pull/5978)
* [`explicit_counter_loop`]: No longer lints, when loop counter is used after it
is incremented [#6076](https://github.com/rust-lang/rust-clippy/pull/6076)
* [`or_fun_call`]: Revert changes addressing the handling of `const fn`
[#6077](https://github.com/rust-lang/rust-clippy/pull/6077)
* [`needless_range_loop`]: No longer lints, when the iterable is used in the
range [#6102](https://github.com/rust-lang/rust-clippy/pull/6102)
* [`inconsistent_digit_grouping`]: Fix bug when using floating point exponent
[#6104](https://github.com/rust-lang/rust-clippy/pull/6104)
* [`mistyped_literal_suffixes`]: No longer lints on the fractional part of a
float (e.g. `713.32_64`)
[#6114](https://github.com/rust-lang/rust-clippy/pull/6114)
* [`invalid_regex`]: No longer lint on unicode characters within `bytes::Regex`
[#6132](https://github.com/rust-lang/rust-clippy/pull/6132)
* [`boxed_local`]: No longer lints on `extern fn` arguments
[#6133](https://github.com/rust-lang/rust-clippy/pull/6133)
* [`needless_lifetimes`]: Fix regression, where lifetime is used in `where`
clause [#6198](https://github.com/rust-lang/rust-clippy/pull/6198)
### Suggestion Fixes/Improvements
* [`unnecessary_sort_by`]: Avoid dereferencing the suggested closure parameter
[#6078](https://github.com/rust-lang/rust-clippy/pull/6078)
* [`needless_arbitrary_self_type`]: Correctly handle expanded code
[#6093](https://github.com/rust-lang/rust-clippy/pull/6093)
* [`useless_format`]: Preserve raw strings in suggestion
[#6151](https://github.com/rust-lang/rust-clippy/pull/6151)
* [`empty_loop`]: Suggest alternatives
[#6162](https://github.com/rust-lang/rust-clippy/pull/6162)
* [`borrowed_box`]: Correctly add parentheses in suggestion
[#6200](https://github.com/rust-lang/rust-clippy/pull/6200)
* [`unused_unit`]: Improve suggestion formatting
[#6247](https://github.com/rust-lang/rust-clippy/pull/6247)
### Documentation Improvements
* Some doc improvements:
* [`rc_buffer`] [#6090](https://github.com/rust-lang/rust-clippy/pull/6090)
* [`empty_loop`] [#6162](https://github.com/rust-lang/rust-clippy/pull/6162)
* [`doc_markdown`]: Document problematic link text style
[#6107](https://github.com/rust-lang/rust-clippy/pull/6107)
## Rust 1.48
Released 2020-11-19
[09bd400...e636b88](https://github.com/rust-lang/rust-clippy/compare/09bd400...e636b88)
### New lints
* [`self_assignment`] [#5894](https://github.com/rust-lang/rust-clippy/pull/5894)
* [`unnecessary_lazy_evaluations`] [#5720](https://github.com/rust-lang/rust-clippy/pull/5720)
* [`manual_strip`] [#6038](https://github.com/rust-lang/rust-clippy/pull/6038)
* [`map_err_ignore`] [#5998](https://github.com/rust-lang/rust-clippy/pull/5998)
* [`rc_buffer`] [#6044](https://github.com/rust-lang/rust-clippy/pull/6044)
* [`to_string_in_display`] [#5831](https://github.com/rust-lang/rust-clippy/pull/5831)
* `single_char_push_str` [#5881](https://github.com/rust-lang/rust-clippy/pull/5881)
### Moves and Deprecations
* Downgrade [`verbose_bit_mask`] to pedantic
[#6036](https://github.com/rust-lang/rust-clippy/pull/6036)
### Enhancements
* Extend [`precedence`] to handle chains of methods combined with unary negation
[#5928](https://github.com/rust-lang/rust-clippy/pull/5928)
* [`useless_vec`]: add a configuration value for the maximum allowed size on the stack
[#5907](https://github.com/rust-lang/rust-clippy/pull/5907)
* [`suspicious_arithmetic_impl`]: extend to implementations of `BitAnd`, `BitOr`, `BitXor`, `Rem`, `Shl`, and `Shr`
[#5884](https://github.com/rust-lang/rust-clippy/pull/5884)
* [`invalid_atomic_ordering`]: detect misuse of `compare_exchange`, `compare_exchange_weak`, and `fetch_update`
[#6025](https://github.com/rust-lang/rust-clippy/pull/6025)
* Avoid [`redundant_pattern_matching`] triggering in macros
[#6069](https://github.com/rust-lang/rust-clippy/pull/6069)
* [`option_if_let_else`]: distinguish pure from impure `else` expressions
[#5937](https://github.com/rust-lang/rust-clippy/pull/5937)
* [`needless_doctest_main`]: parse doctests instead of using textual search
[#5912](https://github.com/rust-lang/rust-clippy/pull/5912)
* [`wildcard_imports`]: allow `prelude` to appear in any segment of an import
[#5929](https://github.com/rust-lang/rust-clippy/pull/5929)
* Re-enable [`len_zero`] for ranges now that `range_is_empty` is stable
[#5961](https://github.com/rust-lang/rust-clippy/pull/5961)
* [`option_as_ref_deref`]: catch fully-qualified calls to `Deref::deref` and `DerefMut::deref_mut`
[#5933](https://github.com/rust-lang/rust-clippy/pull/5933)
### False Positive Fixes
* [`useless_attribute`]: permit allowing [`wildcard_imports`] and [`enum_glob_use`]
[#5994](https://github.com/rust-lang/rust-clippy/pull/5994)
* [`transmute_ptr_to_ptr`]: avoid suggesting dereferencing raw pointers in const contexts
[#5999](https://github.com/rust-lang/rust-clippy/pull/5999)
* [`redundant_closure_call`]: take into account usages of the closure in nested functions and closures
[#5920](https://github.com/rust-lang/rust-clippy/pull/5920)
* Fix false positive in [`borrow_interior_mutable_const`] when referencing a field behind a pointer
[#5949](https://github.com/rust-lang/rust-clippy/pull/5949)
* [`doc_markdown`]: allow using "GraphQL" without backticks
[#5996](https://github.com/rust-lang/rust-clippy/pull/5996)
* [`to_string_in_display`]: avoid linting when calling `to_string()` on anything that is not `self`
[#5971](https://github.com/rust-lang/rust-clippy/pull/5971)
* [`indexing_slicing`] and [`out_of_bounds_indexing`] treat references to arrays as arrays
[#6034](https://github.com/rust-lang/rust-clippy/pull/6034)
* [`should_implement_trait`]: ignore methods with lifetime parameters
[#5725](https://github.com/rust-lang/rust-clippy/pull/5725)
* [`needless_return`]: avoid linting if a temporary borrows a local variable
[#5903](https://github.com/rust-lang/rust-clippy/pull/5903)
* Restrict [`unnecessary_sort_by`] to non-reference, Copy types
[#6006](https://github.com/rust-lang/rust-clippy/pull/6006)
* Avoid suggesting `from_bits`/`to_bits` in const contexts in [`transmute_int_to_float`]
[#5919](https://github.com/rust-lang/rust-clippy/pull/5919)
* [`declare_interior_mutable_const`] and [`borrow_interior_mutable_const`]: improve detection of interior mutable types
[#6046](https://github.com/rust-lang/rust-clippy/pull/6046)
### Suggestion Fixes/Improvements
* [`let_and_return`]: add a cast to the suggestion when the return expression has adjustments
[#5946](https://github.com/rust-lang/rust-clippy/pull/5946)
* [`useless_conversion`]: show the type in the error message
[#6035](https://github.com/rust-lang/rust-clippy/pull/6035)
* [`unnecessary_mut_passed`]: discriminate between functions and methods in the error message
[#5892](https://github.com/rust-lang/rust-clippy/pull/5892)
* [`float_cmp`] and [`float_cmp_const`]: change wording to make margin of error less ambiguous
[#6043](https://github.com/rust-lang/rust-clippy/pull/6043)
* [`default_trait_access`]: do not use unnecessary type parameters in the suggestion
[#5993](https://github.com/rust-lang/rust-clippy/pull/5993)
* [`collapsible_if`]: don't use expanded code in the suggestion
[#5992](https://github.com/rust-lang/rust-clippy/pull/5992)
* Do not suggest empty format strings in [`print_with_newline`] and [`write_with_newline`]
[#6042](https://github.com/rust-lang/rust-clippy/pull/6042)
* [`unit_arg`]: improve the readability of the suggestion
[#5931](https://github.com/rust-lang/rust-clippy/pull/5931)
* [`stable_sort_primitive`]: print the type that is being sorted in the lint message
[#5935](https://github.com/rust-lang/rust-clippy/pull/5935)
* Show line count and max lines in [`too_many_lines`] lint message
[#6009](https://github.com/rust-lang/rust-clippy/pull/6009)
* Keep parentheses in the suggestion of [`useless_conversion`] where applicable
[#5900](https://github.com/rust-lang/rust-clippy/pull/5900)
* [`option_map_unit_fn`] and [`result_map_unit_fn`]: print the unit type `()` explicitly
[#6024](https://github.com/rust-lang/rust-clippy/pull/6024)
* [`redundant_allocation`]: suggest replacing `Rc<Box<T>>` with `Rc<T>`
[#5899](https://github.com/rust-lang/rust-clippy/pull/5899)
* Make lint messages adhere to rustc dev guide conventions
[#5893](https://github.com/rust-lang/rust-clippy/pull/5893)
### ICE Fixes
* Fix ICE in [`repeat_once`]
[#5948](https://github.com/rust-lang/rust-clippy/pull/5948)
### Documentation Improvements
* [`mutable_key_type`]: explain potential for false positives when the interior mutable type is not accessed in the `Hash` implementation
[#6019](https://github.com/rust-lang/rust-clippy/pull/6019)
* [`unnecessary_mut_passed`]: fix typo
[#5913](https://github.com/rust-lang/rust-clippy/pull/5913)
* Add example of false positive to [`ptr_arg`] docs.
[#5885](https://github.com/rust-lang/rust-clippy/pull/5885)
* [`box_vec`], [`vec_box`] and [`borrowed_box`]: add link to the documentation of `Box`
[#6023](https://github.com/rust-lang/rust-clippy/pull/6023)
## Rust 1.47
Released 2020-10-08
[c2c07fa...09bd400](https://github.com/rust-lang/rust-clippy/compare/c2c07fa...09bd400)
### New lints
* [`derive_ord_xor_partial_ord`] [#5848](https://github.com/rust-lang/rust-clippy/pull/5848)
* [`trait_duplication_in_bounds`] [#5852](https://github.com/rust-lang/rust-clippy/pull/5852)
* [`map_identity`] [#5694](https://github.com/rust-lang/rust-clippy/pull/5694)
* [`unit_return_expecting_ord`] [#5737](https://github.com/rust-lang/rust-clippy/pull/5737)
* [`pattern_type_mismatch`] [#4841](https://github.com/rust-lang/rust-clippy/pull/4841)
* [`repeat_once`] [#5773](https://github.com/rust-lang/rust-clippy/pull/5773)
* [`same_item_push`] [#5825](https://github.com/rust-lang/rust-clippy/pull/5825)
* [`needless_arbitrary_self_type`] [#5869](https://github.com/rust-lang/rust-clippy/pull/5869)
* [`match_like_matches_macro`] [#5769](https://github.com/rust-lang/rust-clippy/pull/5769)
* [`stable_sort_primitive`] [#5809](https://github.com/rust-lang/rust-clippy/pull/5809)
* [`blanket_clippy_restriction_lints`] [#5750](https://github.com/rust-lang/rust-clippy/pull/5750)
* [`option_if_let_else`] [#5301](https://github.com/rust-lang/rust-clippy/pull/5301)
### Moves and Deprecations
* Deprecate [`regex_macro`] lint
[#5760](https://github.com/rust-lang/rust-clippy/pull/5760)
* Move [`range_minus_one`] to `pedantic`
[#5752](https://github.com/rust-lang/rust-clippy/pull/5752)
### Enhancements
* Improve [`needless_collect`] by catching `collect` calls followed by `iter` or `into_iter` calls
[#5837](https://github.com/rust-lang/rust-clippy/pull/5837)
* [`panic`], [`todo`], [`unimplemented`] and [`unreachable`] now detect calls with formatting
[#5811](https://github.com/rust-lang/rust-clippy/pull/5811)
* Detect more cases of [`suboptimal_flops`] and [`imprecise_flops`]
[#5443](https://github.com/rust-lang/rust-clippy/pull/5443)
* Handle asymmetrical implementations of `PartialEq` in [`cmp_owned`]
[#5701](https://github.com/rust-lang/rust-clippy/pull/5701)
* Make it possible to allow [`unsafe_derive_deserialize`]
[#5870](https://github.com/rust-lang/rust-clippy/pull/5870)
* Catch `ord.min(a).max(b)` where a < b in [`min_max`]
[#5871](https://github.com/rust-lang/rust-clippy/pull/5871)
* Make [`clone_on_copy`] suggestion machine applicable
[#5745](https://github.com/rust-lang/rust-clippy/pull/5745)
* Enable [`len_zero`] on ranges now that `is_empty` is stable on them
[#5961](https://github.com/rust-lang/rust-clippy/pull/5961)
### False Positive Fixes
* Avoid triggering [`or_fun_call`] with const fns that take no arguments
[#5889](https://github.com/rust-lang/rust-clippy/pull/5889)
* Fix [`redundant_closure_call`] false positive for closures that have multiple calls
[#5800](https://github.com/rust-lang/rust-clippy/pull/5800)
* Don't lint cases involving `ManuallyDrop` in [`redundant_clone`]
[#5824](https://github.com/rust-lang/rust-clippy/pull/5824)
* Treat a single expression the same as a single statement in the 2nd arm of a match in [`single_match_else`]
[#5771](https://github.com/rust-lang/rust-clippy/pull/5771)
* Don't trigger [`unnested_or_patterns`] if the feature `or_patterns` is not enabled
[#5758](https://github.com/rust-lang/rust-clippy/pull/5758)
* Avoid linting if key borrows in [`unnecessary_sort_by`]
[#5756](https://github.com/rust-lang/rust-clippy/pull/5756)
* Consider `Try` impl for `Poll` when generating suggestions in [`try_err`]
[#5857](https://github.com/rust-lang/rust-clippy/pull/5857)
* Take input lifetimes into account in `manual_async_fn`
[#5859](https://github.com/rust-lang/rust-clippy/pull/5859)
* Fix multiple false positives in [`type_repetition_in_bounds`] and add a configuration option
[#5761](https://github.com/rust-lang/rust-clippy/pull/5761)
* Limit the [`suspicious_arithmetic_impl`] lint to one binary operation
[#5820](https://github.com/rust-lang/rust-clippy/pull/5820)
### Suggestion Fixes/Improvements
* Improve readability of [`shadow_unrelated`] suggestion by truncating the RHS snippet
[#5788](https://github.com/rust-lang/rust-clippy/pull/5788)
* Suggest `filter_map` instead of `flat_map` when mapping to `Option` in [`map_flatten`]
[#5846](https://github.com/rust-lang/rust-clippy/pull/5846)
* Ensure suggestion is shown correctly for long method call chains in [`iter_nth_zero`]
[#5793](https://github.com/rust-lang/rust-clippy/pull/5793)
* Drop borrow operator in suggestions of [`redundant_pattern_matching`]
[#5815](https://github.com/rust-lang/rust-clippy/pull/5815)
* Add suggestion for [`iter_skip_next`]
[#5843](https://github.com/rust-lang/rust-clippy/pull/5843)
* Improve [`collapsible_if`] fix suggestion
[#5732](https://github.com/rust-lang/rust-clippy/pull/5732)
### ICE Fixes
* Fix ICE caused by [`needless_collect`]
[#5877](https://github.com/rust-lang/rust-clippy/pull/5877)
* Fix ICE caused by [`unnested_or_patterns`]
[#5784](https://github.com/rust-lang/rust-clippy/pull/5784)
### Documentation Improvements
* Fix grammar of [`await_holding_lock`] documentation
[#5748](https://github.com/rust-lang/rust-clippy/pull/5748)
### Others
* Make lints adhere to the rustc dev guide
[#5888](https://github.com/rust-lang/rust-clippy/pull/5888)
## Rust 1.46
Released 2020-08-27
[7ea7cd1...c2c07fa](https://github.com/rust-lang/rust-clippy/compare/7ea7cd1...c2c07fa)
### New lints
* [`unnested_or_patterns`] [#5378](https://github.com/rust-lang/rust-clippy/pull/5378)
* [`iter_next_slice`] [#5597](https://github.com/rust-lang/rust-clippy/pull/5597)
* [`unnecessary_sort_by`] [#5623](https://github.com/rust-lang/rust-clippy/pull/5623)
* [`vec_resize_to_zero`] [#5637](https://github.com/rust-lang/rust-clippy/pull/5637)
### Moves and Deprecations
* Move [`cast_ptr_alignment`] to pedantic [#5667](https://github.com/rust-lang/rust-clippy/pull/5667)
### Enhancements
* Improve [`mem_replace_with_uninit`] lint [#5695](https://github.com/rust-lang/rust-clippy/pull/5695)
### False Positive Fixes
* [`len_zero`]: Avoid linting ranges when the `range_is_empty` feature is not enabled
[#5656](https://github.com/rust-lang/rust-clippy/pull/5656)
* [`let_and_return`]: Don't lint if a temporary borrow is involved
[#5680](https://github.com/rust-lang/rust-clippy/pull/5680)
* [`reversed_empty_ranges`]: Avoid linting `N..N` in for loop arguments in
[#5692](https://github.com/rust-lang/rust-clippy/pull/5692)
* [`if_same_then_else`]: Don't assume multiplication is always commutative
[#5702](https://github.com/rust-lang/rust-clippy/pull/5702)
* [`blacklisted_name`]: Remove `bar` from the default configuration
[#5712](https://github.com/rust-lang/rust-clippy/pull/5712)
* [`redundant_pattern_matching`]: Avoid suggesting non-`const fn` calls in const contexts
[#5724](https://github.com/rust-lang/rust-clippy/pull/5724)
### Suggestion Fixes/Improvements
* Fix suggestion of [`unit_arg`] lint, so that it suggest semantic equivalent code
[#4455](https://github.com/rust-lang/rust-clippy/pull/4455)
* Add auto applicable suggestion to [`macro_use_imports`]
[#5279](https://github.com/rust-lang/rust-clippy/pull/5279)
### ICE Fixes
* Fix ICE in the `consts` module of Clippy [#5709](https://github.com/rust-lang/rust-clippy/pull/5709)
### Documentation Improvements
* Improve code examples across multiple lints [#5664](https://github.com/rust-lang/rust-clippy/pull/5664)
### Others
* Introduce a `--rustc` flag to `clippy-driver`, which turns `clippy-driver`
into `rustc` and passes all the given arguments to `rustc`. This is especially
useful for tools that need the `rustc` version Clippy was compiled with,
instead of the Clippy version. E.g. `clippy-driver --rustc --version` will
print the output of `rustc --version`.
[#5178](https://github.com/rust-lang/rust-clippy/pull/5178)
* New issue templates now make it easier to complain if Clippy is too annoying
or not annoying enough! [#5735](https://github.com/rust-lang/rust-clippy/pull/5735)
## Rust 1.45
Released 2020-07-16
[891e1a8...7ea7cd1](https://github.com/rust-lang/rust-clippy/compare/891e1a8...7ea7cd1)
### New lints
* [`match_wildcard_for_single_variants`] [#5582](https://github.com/rust-lang/rust-clippy/pull/5582)
* [`unsafe_derive_deserialize`] [#5493](https://github.com/rust-lang/rust-clippy/pull/5493)
* [`if_let_mutex`] [#5332](https://github.com/rust-lang/rust-clippy/pull/5332)
* [`mismatched_target_os`] [#5506](https://github.com/rust-lang/rust-clippy/pull/5506)
* [`await_holding_lock`] [#5439](https://github.com/rust-lang/rust-clippy/pull/5439)
* [`match_on_vec_items`] [#5522](https://github.com/rust-lang/rust-clippy/pull/5522)
* [`manual_async_fn`] [#5576](https://github.com/rust-lang/rust-clippy/pull/5576)
* [`reversed_empty_ranges`] [#5583](https://github.com/rust-lang/rust-clippy/pull/5583)
* [`manual_non_exhaustive`] [#5550](https://github.com/rust-lang/rust-clippy/pull/5550)
### Moves and Deprecations
* Downgrade [`match_bool`] to pedantic [#5408](https://github.com/rust-lang/rust-clippy/pull/5408)
* Downgrade [`match_wild_err_arm`] to pedantic and update help messages. [#5622](https://github.com/rust-lang/rust-clippy/pull/5622)
* Downgrade [`useless_let_if_seq`] to nursery. [#5599](https://github.com/rust-lang/rust-clippy/pull/5599)
* Generalize `option_and_then_some` and rename to [`bind_instead_of_map`]. [#5529](https://github.com/rust-lang/rust-clippy/pull/5529)
* Rename `identity_conversion` to [`useless_conversion`]. [#5568](https://github.com/rust-lang/rust-clippy/pull/5568)
* Merge `block_in_if_condition_expr` and `block_in_if_condition_stmt` into [`blocks_in_if_conditions`].
[#5563](https://github.com/rust-lang/rust-clippy/pull/5563)
* Merge `option_map_unwrap_or`, `option_map_unwrap_or_else` and `result_map_unwrap_or_else` into [`map_unwrap_or`].
[#5563](https://github.com/rust-lang/rust-clippy/pull/5563)
* Merge `option_unwrap_used` and `result_unwrap_used` into [`unwrap_used`].
[#5563](https://github.com/rust-lang/rust-clippy/pull/5563)
* Merge `option_expect_used` and `result_expect_used` into [`expect_used`].
[#5563](https://github.com/rust-lang/rust-clippy/pull/5563)
* Merge `for_loop_over_option` and `for_loop_over_result` into [`for_loops_over_fallibles`].
[#5563](https://github.com/rust-lang/rust-clippy/pull/5563)
### Enhancements
* Avoid running cargo lints when not enabled to improve performance. [#5505](https://github.com/rust-lang/rust-clippy/pull/5505)
* Extend [`useless_conversion`] with `TryFrom` and `TryInto`. [#5631](https://github.com/rust-lang/rust-clippy/pull/5631)
* Lint also in type parameters and where clauses in [`unused_unit`]. [#5592](https://github.com/rust-lang/rust-clippy/pull/5592)
* Do not suggest deriving `Default` in [`new_without_default`]. [#5616](https://github.com/rust-lang/rust-clippy/pull/5616)
### False Positive Fixes
* [`while_let_on_iterator`] [#5525](https://github.com/rust-lang/rust-clippy/pull/5525)
* [`empty_line_after_outer_attr`] [#5609](https://github.com/rust-lang/rust-clippy/pull/5609)
* [`unnecessary_unwrap`] [#5558](https://github.com/rust-lang/rust-clippy/pull/5558)
* [`comparison_chain`] [#5596](https://github.com/rust-lang/rust-clippy/pull/5596)
* Don't trigger [`used_underscore_binding`] in await desugaring. [#5535](https://github.com/rust-lang/rust-clippy/pull/5535)
* Don't trigger [`borrowed_box`] on mutable references. [#5491](https://github.com/rust-lang/rust-clippy/pull/5491)
* Allow `1 << 0` in [`identity_op`]. [#5602](https://github.com/rust-lang/rust-clippy/pull/5602)
* Allow `use super::*;` glob imports in [`wildcard_imports`]. [#5564](https://github.com/rust-lang/rust-clippy/pull/5564)
* Whitelist more words in [`doc_markdown`]. [#5611](https://github.com/rust-lang/rust-clippy/pull/5611)
* Skip dev and build deps in [`multiple_crate_versions`]. [#5636](https://github.com/rust-lang/rust-clippy/pull/5636)
* Honor `allow` attribute on arguments in [`ptr_arg`]. [#5647](https://github.com/rust-lang/rust-clippy/pull/5647)
* Honor lint level attributes for [`redundant_field_names`], [`just_underscores_and_digits`], [`many_single_char_names`]
and [`similar_names`]. [#5651](https://github.com/rust-lang/rust-clippy/pull/5651)
* Ignore calls to `len` in [`or_fun_call`]. [#4429](https://github.com/rust-lang/rust-clippy/pull/4429)
### Suggestion Improvements
* Simplify suggestions in [`manual_memcpy`]. [#5536](https://github.com/rust-lang/rust-clippy/pull/5536)
* Fix suggestion in [`redundant_pattern_matching`] for macros. [#5511](https://github.com/rust-lang/rust-clippy/pull/5511)
* Avoid suggesting `copied()` for mutable references in [`map_clone`]. [#5530](https://github.com/rust-lang/rust-clippy/pull/5530)
* Improve help message for [`clone_double_ref`]. [#5547](https://github.com/rust-lang/rust-clippy/pull/5547)
### ICE Fixes
* Fix ICE caused in unwrap module. [#5590](https://github.com/rust-lang/rust-clippy/pull/5590)
* Fix ICE on rustc test issue-69020-assoc-const-arith-overflow.rs [#5499](https://github.com/rust-lang/rust-clippy/pull/5499)
### Documentation
* Clarify the documentation of [`unnecessary_mut_passed`]. [#5639](https://github.com/rust-lang/rust-clippy/pull/5639)
* Extend example for [`unneeded_field_pattern`]. [#5541](https://github.com/rust-lang/rust-clippy/pull/5541)
## Rust 1.44
Released 2020-06-04
[204bb9b...891e1a8](https://github.com/rust-lang/rust-clippy/compare/204bb9b...891e1a8)
### New lints
* [`explicit_deref_methods`] [#5226](https://github.com/rust-lang/rust-clippy/pull/5226)
* [`implicit_saturating_sub`] [#5427](https://github.com/rust-lang/rust-clippy/pull/5427)
* [`macro_use_imports`] [#5230](https://github.com/rust-lang/rust-clippy/pull/5230)
* [`verbose_file_reads`] [#5272](https://github.com/rust-lang/rust-clippy/pull/5272)
* [`future_not_send`] [#5423](https://github.com/rust-lang/rust-clippy/pull/5423)
* [`redundant_pub_crate`] [#5319](https://github.com/rust-lang/rust-clippy/pull/5319)
* [`large_const_arrays`] [#5248](https://github.com/rust-lang/rust-clippy/pull/5248)
* [`result_map_or_into_option`] [#5415](https://github.com/rust-lang/rust-clippy/pull/5415)
* [`redundant_allocation`] [#5349](https://github.com/rust-lang/rust-clippy/pull/5349)
* [`fn_address_comparisons`] [#5294](https://github.com/rust-lang/rust-clippy/pull/5294)
* [`vtable_address_comparisons`] [#5294](https://github.com/rust-lang/rust-clippy/pull/5294)
### Moves and Deprecations
* Deprecate [`replace_consts`] lint [#5380](https://github.com/rust-lang/rust-clippy/pull/5380)
* Move [`cognitive_complexity`] to nursery [#5428](https://github.com/rust-lang/rust-clippy/pull/5428)
* Move [`useless_transmute`] to nursery [#5364](https://github.com/rust-lang/rust-clippy/pull/5364)
* Downgrade [`inefficient_to_string`] to pedantic [#5412](https://github.com/rust-lang/rust-clippy/pull/5412)
* Downgrade [`option_option`] to pedantic [#5401](https://github.com/rust-lang/rust-clippy/pull/5401)
* Downgrade [`unreadable_literal`] to pedantic [#5419](https://github.com/rust-lang/rust-clippy/pull/5419)
* Downgrade [`let_unit_value`] to pedantic [#5409](https://github.com/rust-lang/rust-clippy/pull/5409)
* Downgrade [`trivially_copy_pass_by_ref`] to pedantic [#5410](https://github.com/rust-lang/rust-clippy/pull/5410)
* Downgrade [`implicit_hasher`] to pedantic [#5411](https://github.com/rust-lang/rust-clippy/pull/5411)
### Enhancements
* On _nightly_ you can now use `cargo clippy --fix -Z unstable-options` to
auto-fix lints that support this [#5363](https://github.com/rust-lang/rust-clippy/pull/5363)
* Make [`redundant_clone`] also trigger on cases where the cloned value is not
consumed. [#5304](https://github.com/rust-lang/rust-clippy/pull/5304)
* Expand [`integer_arithmetic`] to also disallow bit-shifting [#5430](https://github.com/rust-lang/rust-clippy/pull/5430)
* [`option_as_ref_deref`] now detects more deref cases [#5425](https://github.com/rust-lang/rust-clippy/pull/5425)
* [`large_enum_variant`] now report the sizes of the largest and second-largest variants [#5466](https://github.com/rust-lang/rust-clippy/pull/5466)
* [`bool_comparison`] now also checks for inequality comparisons that can be
written more concisely [#5365](https://github.com/rust-lang/rust-clippy/pull/5365)
* Expand [`clone_on_copy`] to work in method call arguments as well [#5441](https://github.com/rust-lang/rust-clippy/pull/5441)
* [`redundant_pattern_matching`] now also handles `while let` [#5483](https://github.com/rust-lang/rust-clippy/pull/5483)
* [`integer_arithmetic`] now also lints references of integers [#5329](https://github.com/rust-lang/rust-clippy/pull/5329)
* Expand [`float_cmp_const`] to also work on arrays [#5345](https://github.com/rust-lang/rust-clippy/pull/5345)
* Trigger [`map_flatten`] when map is called on an `Option` [#5473](https://github.com/rust-lang/rust-clippy/pull/5473)
### False Positive Fixes
* [`many_single_char_names`] [#5468](https://github.com/rust-lang/rust-clippy/pull/5468)
* [`should_implement_trait`] [#5437](https://github.com/rust-lang/rust-clippy/pull/5437)
* [`unused_self`] [#5387](https://github.com/rust-lang/rust-clippy/pull/5387)
* [`redundant_clone`] [#5453](https://github.com/rust-lang/rust-clippy/pull/5453)
* [`precedence`] [#5445](https://github.com/rust-lang/rust-clippy/pull/5445)
* [`suspicious_op_assign_impl`] [#5424](https://github.com/rust-lang/rust-clippy/pull/5424)
* [`needless_lifetimes`] [#5293](https://github.com/rust-lang/rust-clippy/pull/5293)
* [`redundant_pattern`] [#5287](https://github.com/rust-lang/rust-clippy/pull/5287)
* [`inconsistent_digit_grouping`] [#5451](https://github.com/rust-lang/rust-clippy/pull/5451)
### Suggestion Improvements
* Improved [`question_mark`] lint suggestion so that it doesn't add redundant `as_ref()` [#5481](https://github.com/rust-lang/rust-clippy/pull/5481)
* Improve the suggested placeholder in [`option_map_unit_fn`] [#5292](https://github.com/rust-lang/rust-clippy/pull/5292)
* Improve suggestion for [`match_single_binding`] when triggered inside a closure [#5350](https://github.com/rust-lang/rust-clippy/pull/5350)
### ICE Fixes
* Handle the unstable `trivial_bounds` feature [#5296](https://github.com/rust-lang/rust-clippy/pull/5296)
* `shadow_*` lints [#5297](https://github.com/rust-lang/rust-clippy/pull/5297)
### Documentation
* Fix documentation generation for configurable lints [#5353](https://github.com/rust-lang/rust-clippy/pull/5353)
* Update documentation for [`new_ret_no_self`] [#5448](https://github.com/rust-lang/rust-clippy/pull/5448)
* The documentation for [`option_option`] now suggest using a tri-state enum [#5403](https://github.com/rust-lang/rust-clippy/pull/5403)
* Fix bit mask example in [`verbose_bit_mask`] documentation [#5454](https://github.com/rust-lang/rust-clippy/pull/5454)
* [`wildcard_imports`] documentation now mentions that `use ...::prelude::*` is
not linted [#5312](https://github.com/rust-lang/rust-clippy/pull/5312)
## Rust 1.43
Released 2020-04-23
[4ee1206...204bb9b](https://github.com/rust-lang/rust-clippy/compare/4ee1206...204bb9b)
### New lints
* [`imprecise_flops`] [#4897](https://github.com/rust-lang/rust-clippy/pull/4897)
* [`suboptimal_flops`] [#4897](https://github.com/rust-lang/rust-clippy/pull/4897)
* [`wildcard_imports`] [#5029](https://github.com/rust-lang/rust-clippy/pull/5029)
* [`single_component_path_imports`] [#5058](https://github.com/rust-lang/rust-clippy/pull/5058)
* [`match_single_binding`] [#5061](https://github.com/rust-lang/rust-clippy/pull/5061)
* [`let_underscore_lock`] [#5101](https://github.com/rust-lang/rust-clippy/pull/5101)
* [`struct_excessive_bools`] [#5125](https://github.com/rust-lang/rust-clippy/pull/5125)
* [`fn_params_excessive_bools`] [#5125](https://github.com/rust-lang/rust-clippy/pull/5125)
* [`option_env_unwrap`] [#5148](https://github.com/rust-lang/rust-clippy/pull/5148)
* [`lossy_float_literal`] [#5202](https://github.com/rust-lang/rust-clippy/pull/5202)
* [`rest_pat_in_fully_bound_structs`] [#5258](https://github.com/rust-lang/rust-clippy/pull/5258)
### Moves and Deprecations
* Move [`unneeded_field_pattern`] to pedantic group [#5200](https://github.com/rust-lang/rust-clippy/pull/5200)
### Enhancements
* Make [`missing_errors_doc`] lint also trigger on `async` functions
[#5181](https://github.com/rust-lang/rust-clippy/pull/5181)
* Add more constants to [`approx_constant`] [#5193](https://github.com/rust-lang/rust-clippy/pull/5193)
* Extend [`question_mark`] lint [#5266](https://github.com/rust-lang/rust-clippy/pull/5266)
### False Positive Fixes
* [`use_debug`] [#5047](https://github.com/rust-lang/rust-clippy/pull/5047)
* [`unnecessary_unwrap`] [#5132](https://github.com/rust-lang/rust-clippy/pull/5132)
* [`zero_prefixed_literal`] [#5170](https://github.com/rust-lang/rust-clippy/pull/5170)
* [`missing_const_for_fn`] [#5216](https://github.com/rust-lang/rust-clippy/pull/5216)
### Suggestion Improvements
* Improve suggestion when blocks of code are suggested [#5134](https://github.com/rust-lang/rust-clippy/pull/5134)
### ICE Fixes
* `misc_early` lints [#5129](https://github.com/rust-lang/rust-clippy/pull/5129)
* [`missing_errors_doc`] [#5213](https://github.com/rust-lang/rust-clippy/pull/5213)
* Fix ICE when evaluating `usize`s [#5256](https://github.com/rust-lang/rust-clippy/pull/5256)
### Documentation
* Improve documentation of [`iter_nth_zero`]
* Add documentation pages for stable releases [#5171](https://github.com/rust-lang/rust-clippy/pull/5171)
### Others
* Clippy now completely runs on GitHub Actions [#5190](https://github.com/rust-lang/rust-clippy/pull/5190)
## Rust 1.42
Released 2020-03-12
[69f99e7...4ee1206](https://github.com/rust-lang/rust-clippy/compare/69f99e7...4ee1206)
### New lints
* [`filetype_is_file`] [#4543](https://github.com/rust-lang/rust-clippy/pull/4543)
* [`let_underscore_must_use`] [#4823](https://github.com/rust-lang/rust-clippy/pull/4823)
* [`modulo_arithmetic`] [#4867](https://github.com/rust-lang/rust-clippy/pull/4867)
* [`mem_replace_with_default`] [#4881](https://github.com/rust-lang/rust-clippy/pull/4881)
* [`mutable_key_type`] [#4885](https://github.com/rust-lang/rust-clippy/pull/4885)
* [`option_as_ref_deref`] [#4945](https://github.com/rust-lang/rust-clippy/pull/4945)
* [`wildcard_in_or_patterns`] [#4960](https://github.com/rust-lang/rust-clippy/pull/4960)
* [`iter_nth_zero`] [#4966](https://github.com/rust-lang/rust-clippy/pull/4966)
* [`invalid_atomic_ordering`] [#4999](https://github.com/rust-lang/rust-clippy/pull/4999)
* [`skip_while_next`] [#5067](https://github.com/rust-lang/rust-clippy/pull/5067)
### Moves and Deprecations
* Move [`transmute_float_to_int`] from nursery to complexity group
[#5015](https://github.com/rust-lang/rust-clippy/pull/5015)
* Move [`range_plus_one`] to pedantic group [#5057](https://github.com/rust-lang/rust-clippy/pull/5057)
* Move [`debug_assert_with_mut_call`] to nursery group [#5106](https://github.com/rust-lang/rust-clippy/pull/5106)
* Deprecate [`unused_label`] [#4930](https://github.com/rust-lang/rust-clippy/pull/4930)
### Enhancements
* Lint vectored IO in [`unused_io_amount`] [#5027](https://github.com/rust-lang/rust-clippy/pull/5027)
* Make [`vec_box`] configurable by adding a size threshold [#5081](https://github.com/rust-lang/rust-clippy/pull/5081)
* Also lint constants in [`cmp_nan`] [#4910](https://github.com/rust-lang/rust-clippy/pull/4910)
* Fix false negative in [`expect_fun_call`] [#4915](https://github.com/rust-lang/rust-clippy/pull/4915)
* Fix false negative in [`redundant_clone`] [#5017](https://github.com/rust-lang/rust-clippy/pull/5017)
### False Positive Fixes
* [`map_clone`] [#4937](https://github.com/rust-lang/rust-clippy/pull/4937)
* [`replace_consts`] [#4977](https://github.com/rust-lang/rust-clippy/pull/4977)
* [`let_and_return`] [#5008](https://github.com/rust-lang/rust-clippy/pull/5008)
* [`eq_op`] [#5079](https://github.com/rust-lang/rust-clippy/pull/5079)
* [`possible_missing_comma`] [#5083](https://github.com/rust-lang/rust-clippy/pull/5083)
* [`debug_assert_with_mut_call`] [#5106](https://github.com/rust-lang/rust-clippy/pull/5106)
* Don't trigger [`let_underscore_must_use`] in external macros
[#5082](https://github.com/rust-lang/rust-clippy/pull/5082)
* Don't trigger [`empty_loop`] in `no_std` crates [#5086](https://github.com/rust-lang/rust-clippy/pull/5086)
### Suggestion Improvements
* `option_map_unwrap_or` [#4634](https://github.com/rust-lang/rust-clippy/pull/4634)
* [`wildcard_enum_match_arm`] [#4934](https://github.com/rust-lang/rust-clippy/pull/4934)
* [`cognitive_complexity`] [#4935](https://github.com/rust-lang/rust-clippy/pull/4935)
* [`decimal_literal_representation`] [#4956](https://github.com/rust-lang/rust-clippy/pull/4956)
* [`unknown_clippy_lints`] [#4963](https://github.com/rust-lang/rust-clippy/pull/4963)
* [`explicit_into_iter_loop`] [#4978](https://github.com/rust-lang/rust-clippy/pull/4978)
* [`useless_attribute`] [#5022](https://github.com/rust-lang/rust-clippy/pull/5022)
* [`if_let_some_result`] [#5032](https://github.com/rust-lang/rust-clippy/pull/5032)
### ICE fixes
* [`unsound_collection_transmute`] [#4975](https://github.com/rust-lang/rust-clippy/pull/4975)
### Documentation
* Improve documentation of [`empty_enum`], [`replace_consts`], [`redundant_clone`], and [`iterator_step_by_zero`]
## Rust 1.41
Released 2020-01-30
[c8e3cfb...69f99e7](https://github.com/rust-lang/rust-clippy/compare/c8e3cfb...69f99e7)
* New Lints:
* [`exit`] [#4697](https://github.com/rust-lang/rust-clippy/pull/4697)
* [`to_digit_is_some`] [#4801](https://github.com/rust-lang/rust-clippy/pull/4801)
* [`tabs_in_doc_comments`] [#4806](https://github.com/rust-lang/rust-clippy/pull/4806)
* [`large_stack_arrays`] [#4807](https://github.com/rust-lang/rust-clippy/pull/4807)
* [`same_functions_in_if_condition`] [#4814](https://github.com/rust-lang/rust-clippy/pull/4814)
* [`zst_offset`] [#4816](https://github.com/rust-lang/rust-clippy/pull/4816)
* [`as_conversions`] [#4821](https://github.com/rust-lang/rust-clippy/pull/4821)
* [`missing_errors_doc`] [#4884](https://github.com/rust-lang/rust-clippy/pull/4884)
* [`transmute_float_to_int`] [#4889](https://github.com/rust-lang/rust-clippy/pull/4889)
* Remove plugin interface, see
[Inside Rust Blog](https://blog.rust-lang.org/inside-rust/2019/11/04/Clippy-removes-plugin-interface.html) for
details [#4714](https://github.com/rust-lang/rust-clippy/pull/4714)
* Move [`use_self`] to nursery group [#4863](https://github.com/rust-lang/rust-clippy/pull/4863)
* Deprecate [`into_iter_on_array`] [#4788](https://github.com/rust-lang/rust-clippy/pull/4788)
* Expand [`string_lit_as_bytes`] to also trigger when literal has escapes
[#4808](https://github.com/rust-lang/rust-clippy/pull/4808)
* Fix false positive in `comparison_chain` [#4842](https://github.com/rust-lang/rust-clippy/pull/4842)
* Fix false positive in `while_immutable_condition` [#4730](https://github.com/rust-lang/rust-clippy/pull/4730)
* Fix false positive in `explicit_counter_loop` [#4803](https://github.com/rust-lang/rust-clippy/pull/4803)
* Fix false positive in `must_use_candidate` [#4794](https://github.com/rust-lang/rust-clippy/pull/4794)
* Fix false positive in `print_with_newline` and `write_with_newline`
[#4769](https://github.com/rust-lang/rust-clippy/pull/4769)
* Fix false positive in `derive_hash_xor_eq` [#4766](https://github.com/rust-lang/rust-clippy/pull/4766)
* Fix false positive in `missing_inline_in_public_items` [#4870](https://github.com/rust-lang/rust-clippy/pull/4870)
* Fix false positive in `string_add` [#4880](https://github.com/rust-lang/rust-clippy/pull/4880)
* Fix false positive in `float_arithmetic` [#4851](https://github.com/rust-lang/rust-clippy/pull/4851)
* Fix false positive in `cast_sign_loss` [#4883](https://github.com/rust-lang/rust-clippy/pull/4883)
* Fix false positive in `manual_swap` [#4877](https://github.com/rust-lang/rust-clippy/pull/4877)
* Fix ICEs occurring while checking some block expressions [#4772](https://github.com/rust-lang/rust-clippy/pull/4772)
* Fix ICE in `use_self` [#4776](https://github.com/rust-lang/rust-clippy/pull/4776)
* Fix ICEs related to `const_generics` [#4780](https://github.com/rust-lang/rust-clippy/pull/4780)
* Display help when running `clippy-driver` without arguments, instead of ICEing
[#4810](https://github.com/rust-lang/rust-clippy/pull/4810)
* Clippy has its own ICE message now [#4588](https://github.com/rust-lang/rust-clippy/pull/4588)
* Show deprecated lints in the documentation again [#4757](https://github.com/rust-lang/rust-clippy/pull/4757)
* Improve Documentation by adding positive examples to some lints
[#4832](https://github.com/rust-lang/rust-clippy/pull/4832)
## Rust 1.40
Released 2019-12-19
[4e7e71b...c8e3cfb](https://github.com/rust-lang/rust-clippy/compare/4e7e71b...c8e3cfb)
* New Lints:
* [`unneeded_wildcard_pattern`] [#4537](https://github.com/rust-lang/rust-clippy/pull/4537)
* [`needless_doctest_main`] [#4603](https://github.com/rust-lang/rust-clippy/pull/4603)
* [`suspicious_unary_op_formatting`] [#4615](https://github.com/rust-lang/rust-clippy/pull/4615)
* [`debug_assert_with_mut_call`] [#4680](https://github.com/rust-lang/rust-clippy/pull/4680)
* [`unused_self`] [#4619](https://github.com/rust-lang/rust-clippy/pull/4619)
* [`inefficient_to_string`] [#4683](https://github.com/rust-lang/rust-clippy/pull/4683)
* [`must_use_unit`] [#4560](https://github.com/rust-lang/rust-clippy/pull/4560)
* [`must_use_candidate`] [#4560](https://github.com/rust-lang/rust-clippy/pull/4560)
* [`double_must_use`] [#4560](https://github.com/rust-lang/rust-clippy/pull/4560)
* [`comparison_chain`] [#4569](https://github.com/rust-lang/rust-clippy/pull/4569)
* [`unsound_collection_transmute`] [#4592](https://github.com/rust-lang/rust-clippy/pull/4592)
* [`panic`] [#4657](https://github.com/rust-lang/rust-clippy/pull/4657)
* [`unreachable`] [#4657](https://github.com/rust-lang/rust-clippy/pull/4657)
* [`todo`] [#4657](https://github.com/rust-lang/rust-clippy/pull/4657)
* `option_expect_used` [#4657](https://github.com/rust-lang/rust-clippy/pull/4657)
* `result_expect_used` [#4657](https://github.com/rust-lang/rust-clippy/pull/4657)
* Move `redundant_clone` to perf group [#4509](https://github.com/rust-lang/rust-clippy/pull/4509)
* Move `manual_mul_add` to nursery group [#4736](https://github.com/rust-lang/rust-clippy/pull/4736)
* Expand `unit_cmp` to also work with `assert_eq!`, `debug_assert_eq!`, `assert_ne!` and `debug_assert_ne!` [#4613](https://github.com/rust-lang/rust-clippy/pull/4613)
* Expand `integer_arithmetic` to also detect mutating arithmetic like `+=` [#4585](https://github.com/rust-lang/rust-clippy/pull/4585)
* Fix false positive in `nonminimal_bool` [#4568](https://github.com/rust-lang/rust-clippy/pull/4568)
* Fix false positive in `missing_safety_doc` [#4611](https://github.com/rust-lang/rust-clippy/pull/4611)
* Fix false positive in `cast_sign_loss` [#4614](https://github.com/rust-lang/rust-clippy/pull/4614)
* Fix false positive in `redundant_clone` [#4509](https://github.com/rust-lang/rust-clippy/pull/4509)
* Fix false positive in `try_err` [#4721](https://github.com/rust-lang/rust-clippy/pull/4721)
* Fix false positive in `toplevel_ref_arg` [#4570](https://github.com/rust-lang/rust-clippy/pull/4570)
* Fix false positive in `multiple_inherent_impl` [#4593](https://github.com/rust-lang/rust-clippy/pull/4593)
* Improve more suggestions and tests in preparation for the unstable `cargo fix --clippy` [#4575](https://github.com/rust-lang/rust-clippy/pull/4575)
* Improve suggestion for `zero_ptr` [#4599](https://github.com/rust-lang/rust-clippy/pull/4599)
* Improve suggestion for `explicit_counter_loop` [#4691](https://github.com/rust-lang/rust-clippy/pull/4691)
* Improve suggestion for `mul_add` [#4602](https://github.com/rust-lang/rust-clippy/pull/4602)
* Improve suggestion for `assertions_on_constants` [#4635](https://github.com/rust-lang/rust-clippy/pull/4635)
* Fix ICE in `use_self` [#4671](https://github.com/rust-lang/rust-clippy/pull/4671)
* Fix ICE when encountering const casts [#4590](https://github.com/rust-lang/rust-clippy/pull/4590)
## Rust 1.39
Released 2019-11-07
[3aea860...4e7e71b](https://github.com/rust-lang/rust-clippy/compare/3aea860...4e7e71b)
* New Lints:
* [`uninit_assumed_init`] [#4479](https://github.com/rust-lang/rust-clippy/pull/4479)
* [`flat_map_identity`] [#4231](https://github.com/rust-lang/rust-clippy/pull/4231)
* [`missing_safety_doc`] [#4535](https://github.com/rust-lang/rust-clippy/pull/4535)
* [`mem_replace_with_uninit`] [#4511](https://github.com/rust-lang/rust-clippy/pull/4511)
* [`suspicious_map`] [#4394](https://github.com/rust-lang/rust-clippy/pull/4394)
* `option_and_then_some` [#4386](https://github.com/rust-lang/rust-clippy/pull/4386)
* [`manual_saturating_arithmetic`] [#4498](https://github.com/rust-lang/rust-clippy/pull/4498)
* Deprecate `unused_collect` lint. This is fully covered by rustc's `#[must_use]` on `collect` [#4348](https://github.com/rust-lang/rust-clippy/pull/4348)
* Move `type_repetition_in_bounds` to pedantic group [#4403](https://github.com/rust-lang/rust-clippy/pull/4403)
* Move `cast_lossless` to pedantic group [#4539](https://github.com/rust-lang/rust-clippy/pull/4539)
* `temporary_cstring_as_ptr` now catches more cases [#4425](https://github.com/rust-lang/rust-clippy/pull/4425)
* `use_self` now works in constructors, too [#4525](https://github.com/rust-lang/rust-clippy/pull/4525)
* `cargo_common_metadata` now checks for license files [#4518](https://github.com/rust-lang/rust-clippy/pull/4518)
* `cognitive_complexity` now includes the measured complexity in the warning message [#4469](https://github.com/rust-lang/rust-clippy/pull/4469)
* Fix false positives in `block_in_if_*` lints [#4458](https://github.com/rust-lang/rust-clippy/pull/4458)
* Fix false positive in `cast_lossless` [#4473](https://github.com/rust-lang/rust-clippy/pull/4473)
* Fix false positive in `clone_on_copy` [#4411](https://github.com/rust-lang/rust-clippy/pull/4411)
* Fix false positive in `deref_addrof` [#4487](https://github.com/rust-lang/rust-clippy/pull/4487)
* Fix false positive in `too_many_lines` [#4490](https://github.com/rust-lang/rust-clippy/pull/4490)
* Fix false positive in `new_ret_no_self` [#4365](https://github.com/rust-lang/rust-clippy/pull/4365)
* Fix false positive in `manual_swap` [#4478](https://github.com/rust-lang/rust-clippy/pull/4478)
* Fix false positive in `missing_const_for_fn` [#4450](https://github.com/rust-lang/rust-clippy/pull/4450)
* Fix false positive in `extra_unused_lifetimes` [#4477](https://github.com/rust-lang/rust-clippy/pull/4477)
* Fix false positive in `inherent_to_string` [#4460](https://github.com/rust-lang/rust-clippy/pull/4460)
* Fix false positive in `map_entry` [#4495](https://github.com/rust-lang/rust-clippy/pull/4495)
* Fix false positive in `unused_unit` [#4445](https://github.com/rust-lang/rust-clippy/pull/4445)
* Fix false positive in `redundant_pattern` [#4489](https://github.com/rust-lang/rust-clippy/pull/4489)
* Fix false positive in `wrong_self_convention` [#4369](https://github.com/rust-lang/rust-clippy/pull/4369)
* Improve various suggestions and tests in preparation for the unstable `cargo fix --clippy` [#4558](https://github.com/rust-lang/rust-clippy/pull/4558)
* Improve suggestions for `redundant_pattern_matching` [#4352](https://github.com/rust-lang/rust-clippy/pull/4352)
* Improve suggestions for `explicit_write` [#4544](https://github.com/rust-lang/rust-clippy/pull/4544)
* Improve suggestion for `or_fun_call` [#4522](https://github.com/rust-lang/rust-clippy/pull/4522)
* Improve suggestion for `match_as_ref` [#4446](https://github.com/rust-lang/rust-clippy/pull/4446)
* Improve suggestion for `unnecessary_fold_span` [#4382](https://github.com/rust-lang/rust-clippy/pull/4382)
* Add suggestions for `unseparated_literal_suffix` [#4401](https://github.com/rust-lang/rust-clippy/pull/4401)
* Add suggestions for `char_lit_as_u8` [#4418](https://github.com/rust-lang/rust-clippy/pull/4418)
## Rust 1.38
Released 2019-09-26
[e3cb40e...3aea860](https://github.com/rust-lang/rust-clippy/compare/e3cb40e...3aea860)
* New Lints:
* [`main_recursion`] [#4203](https://github.com/rust-lang/rust-clippy/pull/4203)
* [`inherent_to_string`] [#4259](https://github.com/rust-lang/rust-clippy/pull/4259)
* [`inherent_to_string_shadow_display`] [#4259](https://github.com/rust-lang/rust-clippy/pull/4259)
* [`type_repetition_in_bounds`] [#3766](https://github.com/rust-lang/rust-clippy/pull/3766)
* [`try_err`] [#4222](https://github.com/rust-lang/rust-clippy/pull/4222)
* Move `{unnnecessary,panicking}_unwrap` out of nursery [#4307](https://github.com/rust-lang/rust-clippy/pull/4307)
* Extend the `use_self` lint to suggest uses of `Self::Variant` [#4308](https://github.com/rust-lang/rust-clippy/pull/4308)
* Improve suggestion for needless return [#4262](https://github.com/rust-lang/rust-clippy/pull/4262)
* Add auto-fixable suggestion for `let_unit` [#4337](https://github.com/rust-lang/rust-clippy/pull/4337)
* Fix false positive in `pub_enum_variant_names` and `enum_variant_names` [#4345](https://github.com/rust-lang/rust-clippy/pull/4345)
* Fix false positive in `cast_ptr_alignment` [#4257](https://github.com/rust-lang/rust-clippy/pull/4257)
* Fix false positive in `string_lit_as_bytes` [#4233](https://github.com/rust-lang/rust-clippy/pull/4233)
* Fix false positive in `needless_lifetimes` [#4266](https://github.com/rust-lang/rust-clippy/pull/4266)
* Fix false positive in `float_cmp` [#4275](https://github.com/rust-lang/rust-clippy/pull/4275)
* Fix false positives in `needless_return` [#4274](https://github.com/rust-lang/rust-clippy/pull/4274)
* Fix false negative in `match_same_arms` [#4246](https://github.com/rust-lang/rust-clippy/pull/4246)
* Fix incorrect suggestion for `needless_bool` [#4335](https://github.com/rust-lang/rust-clippy/pull/4335)
* Improve suggestion for `cast_ptr_alignment` [#4257](https://github.com/rust-lang/rust-clippy/pull/4257)
* Improve suggestion for `single_char_literal` [#4361](https://github.com/rust-lang/rust-clippy/pull/4361)
* Improve suggestion for `len_zero` [#4314](https://github.com/rust-lang/rust-clippy/pull/4314)
* Fix ICE in `implicit_hasher` [#4268](https://github.com/rust-lang/rust-clippy/pull/4268)
* Fix allow bug in `trivially_copy_pass_by_ref` [#4250](https://github.com/rust-lang/rust-clippy/pull/4250)
## Rust 1.37
Released 2019-08-15
[082cfa7...e3cb40e](https://github.com/rust-lang/rust-clippy/compare/082cfa7...e3cb40e)
* New Lints:
* [`checked_conversions`] [#4088](https://github.com/rust-lang/rust-clippy/pull/4088)
* [`get_last_with_len`] [#3832](https://github.com/rust-lang/rust-clippy/pull/3832)
* [`integer_division`] [#4195](https://github.com/rust-lang/rust-clippy/pull/4195)
* Renamed Lint: `const_static_lifetime` is now called [`redundant_static_lifetimes`].
The lint now covers statics in addition to consts [#4162](https://github.com/rust-lang/rust-clippy/pull/4162)
* [`match_same_arms`] now warns for all identical arms, instead of only the first one [#4102](https://github.com/rust-lang/rust-clippy/pull/4102)
* [`needless_return`] now works with void functions [#4220](https://github.com/rust-lang/rust-clippy/pull/4220)
* Fix false positive in [`redundant_closure`] [#4190](https://github.com/rust-lang/rust-clippy/pull/4190)
* Fix false positive in [`useless_attribute`] [#4107](https://github.com/rust-lang/rust-clippy/pull/4107)
* Fix incorrect suggestion for [`float_cmp`] [#4214](https://github.com/rust-lang/rust-clippy/pull/4214)
* Add suggestions for [`print_with_newline`] and [`write_with_newline`] [#4136](https://github.com/rust-lang/rust-clippy/pull/4136)
* Improve suggestions for `option_map_unwrap_or_else` and `result_map_unwrap_or_else` [#4164](https://github.com/rust-lang/rust-clippy/pull/4164)
* Improve suggestions for [`non_ascii_literal`] [#4119](https://github.com/rust-lang/rust-clippy/pull/4119)
* Improve diagnostics for [`let_and_return`] [#4137](https://github.com/rust-lang/rust-clippy/pull/4137)
* Improve diagnostics for [`trivially_copy_pass_by_ref`] [#4071](https://github.com/rust-lang/rust-clippy/pull/4071)
* Add macro check for [`unreadable_literal`] [#4099](https://github.com/rust-lang/rust-clippy/pull/4099)
## Rust 1.36
Released 2019-07-04
[eb9f9b1...082cfa7](https://github.com/rust-lang/rust-clippy/compare/eb9f9b1...082cfa7)
* New lints: [`find_map`], [`filter_map_next`] [#4039](https://github.com/rust-lang/rust-clippy/pull/4039)
* New lint: [`path_buf_push_overwrite`] [#3954](https://github.com/rust-lang/rust-clippy/pull/3954)
* Move `path_buf_push_overwrite` to the nursery [#4013](https://github.com/rust-lang/rust-clippy/pull/4013)
* Split [`redundant_closure`] into [`redundant_closure`] and [`redundant_closure_for_method_calls`] [#4110](https://github.com/rust-lang/rust-clippy/pull/4101)
* Allow allowing of [`toplevel_ref_arg`] lint [#4007](https://github.com/rust-lang/rust-clippy/pull/4007)
* Fix false negative in [`or_fun_call`] pertaining to nested constructors [#4084](https://github.com/rust-lang/rust-clippy/pull/4084)
* Fix false positive in [`or_fun_call`] pertaining to enum variant constructors [#4018](https://github.com/rust-lang/rust-clippy/pull/4018)
* Fix false positive in [`useless_let_if_seq`] pertaining to interior mutability [#4035](https://github.com/rust-lang/rust-clippy/pull/4035)
* Fix false positive in [`redundant_closure`] pertaining to non-function types [#4008](https://github.com/rust-lang/rust-clippy/pull/4008)
* Fix false positive in [`let_and_return`] pertaining to attributes on `let`s [#4024](https://github.com/rust-lang/rust-clippy/pull/4024)
* Fix false positive in [`module_name_repetitions`] lint pertaining to attributes [#4006](https://github.com/rust-lang/rust-clippy/pull/4006)
* Fix false positive on [`assertions_on_constants`] pertaining to `debug_assert!` [#3989](https://github.com/rust-lang/rust-clippy/pull/3989)
* Improve suggestion in [`map_clone`] to suggest `.copied()` where applicable [#3970](https://github.com/rust-lang/rust-clippy/pull/3970) [#4043](https://github.com/rust-lang/rust-clippy/pull/4043)
* Improve suggestion for [`search_is_some`] [#4049](https://github.com/rust-lang/rust-clippy/pull/4049)
* Improve suggestion applicability for [`naive_bytecount`] [#3984](https://github.com/rust-lang/rust-clippy/pull/3984)
* Improve suggestion applicability for [`while_let_loop`] [#3975](https://github.com/rust-lang/rust-clippy/pull/3975)
* Improve diagnostics for [`too_many_arguments`] [#4053](https://github.com/rust-lang/rust-clippy/pull/4053)
* Improve diagnostics for [`cast_lossless`] [#4021](https://github.com/rust-lang/rust-clippy/pull/4021)
* Deal with macro checks in desugarings better [#4082](https://github.com/rust-lang/rust-clippy/pull/4082)
* Add macro check for [`unnecessary_cast`] [#4026](https://github.com/rust-lang/rust-clippy/pull/4026)
* Remove [`approx_constant`]'s documentation's "Known problems" section. [#4027](https://github.com/rust-lang/rust-clippy/pull/4027)
* Fix ICE in [`suspicious_else_formatting`] [#3960](https://github.com/rust-lang/rust-clippy/pull/3960)
* Fix ICE in [`decimal_literal_representation`] [#3931](https://github.com/rust-lang/rust-clippy/pull/3931)
## Rust 1.35
Released 2019-05-20
[1fac380..37f5c1e](https://github.com/rust-lang/rust-clippy/compare/1fac380...37f5c1e)
* New lint: [`drop_bounds`] to detect `T: Drop` bounds
* Split [`redundant_closure`] into [`redundant_closure`] and [`redundant_closure_for_method_calls`] [#4110](https://github.com/rust-lang/rust-clippy/pull/4101)
* Rename `cyclomatic_complexity` to [`cognitive_complexity`], start work on making lint more practical for Rust code
* Move [`get_unwrap`] to the restriction category
* Improve suggestions for [`iter_cloned_collect`]
* Improve suggestions for [`cast_lossless`] to suggest suffixed literals
* Fix false positives in [`print_with_newline`] and [`write_with_newline`] pertaining to raw strings
* Fix false positive in [`needless_range_loop`] pertaining to structs without a `.iter()`
* Fix false positive in [`bool_comparison`] pertaining to non-bool types
* Fix false positive in [`redundant_closure`] pertaining to differences in borrows
* Fix false positive in `option_map_unwrap_or` on non-copy types
* Fix false positives in [`missing_const_for_fn`] pertaining to macros and trait method impls
* Fix false positive in [`needless_pass_by_value`] pertaining to procedural macros
* Fix false positive in [`needless_continue`] pertaining to loop labels
* Fix false positive for [`boxed_local`] pertaining to arguments moved into closures
* Fix false positive for [`use_self`] in nested functions
* Fix suggestion for [`expect_fun_call`] (https://github.com/rust-lang/rust-clippy/pull/3846)
* Fix suggestion for [`explicit_counter_loop`] to deal with parenthesizing range variables
* Fix suggestion for [`single_char_pattern`] to correctly escape single quotes
* Avoid triggering [`redundant_closure`] in macros
* ICE fixes: [#3805](https://github.com/rust-lang/rust-clippy/pull/3805), [#3772](https://github.com/rust-lang/rust-clippy/pull/3772), [#3741](https://github.com/rust-lang/rust-clippy/pull/3741)
## Rust 1.34
Released 2019-04-10
[1b89724...1fac380](https://github.com/rust-lang/rust-clippy/compare/1b89724...1fac380)
* New lint: [`assertions_on_constants`] to detect for example `assert!(true)`
* New lint: [`dbg_macro`] to detect uses of the `dbg!` macro
* New lint: [`missing_const_for_fn`] that can suggest functions to be made `const`
* New lint: [`too_many_lines`] to detect functions with excessive LOC. It can be
configured using the `too-many-lines-threshold` configuration.
* New lint: [`wildcard_enum_match_arm`] to check for wildcard enum matches using `_`
* Expand `redundant_closure` to also work for methods (not only functions)
* Fix ICEs in `vec_box`, `needless_pass_by_value` and `implicit_hasher`
* Fix false positive in `cast_sign_loss`
* Fix false positive in `integer_arithmetic`
* Fix false positive in `unit_arg`
* Fix false positives in `implicit_return`
* Add suggestion to `explicit_write`
* Improve suggestions for `question_mark` lint
* Fix incorrect suggestion for `cast_lossless`
* Fix incorrect suggestion for `expect_fun_call`
* Fix incorrect suggestion for `needless_bool`
* Fix incorrect suggestion for `needless_range_loop`
* Fix incorrect suggestion for `use_self`
* Fix incorrect suggestion for `while_let_on_iterator`
* Clippy is now slightly easier to invoke in non-cargo contexts. See
[#3665][pull3665] for more details.
* We now have [improved documentation][adding_lints] on how to add new lints
## Rust 1.33
Released 2019-02-26
[b2601be...1b89724](https://github.com/rust-lang/rust-clippy/compare/b2601be...1b89724)
* New lints: [`implicit_return`], [`vec_box`], [`cast_ref_to_mut`]
* The `rust-clippy` repository is now part of the `rust-lang` org.
* Rename `stutter` to `module_name_repetitions`
* Merge `new_without_default_derive` into `new_without_default` lint
* Move `large_digit_groups` from `style` group to `pedantic`
* Expand `bool_comparison` to check for `<`, `<=`, `>`, `>=`, and `!=`
comparisons against booleans
* Expand `no_effect` to detect writes to constants such as `A_CONST.field = 2`
* Expand `redundant_clone` to work on struct fields
* Expand `suspicious_else_formatting` to detect `if .. {..} {..}`
* Expand `use_self` to work on tuple structs and also in local macros
* Fix ICE in `result_map_unit_fn` and `option_map_unit_fn`
* Fix false positives in `implicit_return`
* Fix false positives in `use_self`
* Fix false negative in `clone_on_copy`
* Fix false positive in `doc_markdown`
* Fix false positive in `empty_loop`
* Fix false positive in `if_same_then_else`
* Fix false positive in `infinite_iter`
* Fix false positive in `question_mark`
* Fix false positive in `useless_asref`
* Fix false positive in `wildcard_dependencies`
* Fix false positive in `write_with_newline`
* Add suggestion to `explicit_write`
* Improve suggestions for `question_mark` lint
* Fix incorrect suggestion for `get_unwrap`
## Rust 1.32
Released 2019-01-17
[2e26fdc2...b2601be](https://github.com/rust-lang/rust-clippy/compare/2e26fdc2...b2601be)
* New lints: [`slow_vector_initialization`], [`mem_discriminant_non_enum`],
[`redundant_clone`], [`wildcard_dependencies`],
[`into_iter_on_ref`], [`into_iter_on_array`], [`deprecated_cfg_attr`],
[`mem_discriminant_non_enum`], [`cargo_common_metadata`]
* Add support for `u128` and `i128` to integer related lints
* Add float support to `mistyped_literal_suffixes`
* Fix false positives in `use_self`
* Fix false positives in `missing_comma`
* Fix false positives in `new_ret_no_self`
* Fix false positives in `possible_missing_comma`
* Fix false positive in `integer_arithmetic` in constant items
* Fix false positive in `needless_borrow`
* Fix false positive in `out_of_bounds_indexing`
* Fix false positive in `new_without_default_derive`
* Fix false positive in `string_lit_as_bytes`
* Fix false negative in `out_of_bounds_indexing`
* Fix false negative in `use_self`. It will now also check existential types
* Fix incorrect suggestion for `redundant_closure_call`
* Fix various suggestions that contained expanded macros
* Fix `bool_comparison` triggering 3 times on on on the same code
* Expand `trivially_copy_pass_by_ref` to work on trait methods
* Improve suggestion for `needless_range_loop`
* Move `needless_pass_by_value` from `pedantic` group to `style`
## Rust 1.31
Released 2018-12-06
[125907ad..2e26fdc2](https://github.com/rust-lang/rust-clippy/compare/125907ad..2e26fdc2)
* Clippy has been relicensed under a dual MIT / Apache license.
See [#3093](https://github.com/rust-lang/rust-clippy/issues/3093) for more
information.
* With Rust 1.31, Clippy is no longer available via crates.io. The recommended
installation method is via `rustup component add clippy`.
* New lints: [`redundant_pattern_matching`], [`unnecessary_filter_map`],
[`unused_unit`], [`map_flatten`], [`mem_replace_option_with_none`]
* Fix ICE in `if_let_redundant_pattern_matching`
* Fix ICE in `needless_pass_by_value` when encountering a generic function
argument with a lifetime parameter
* Fix ICE in `needless_range_loop`
* Fix ICE in `single_char_pattern` when encountering a constant value
* Fix false positive in `assign_op_pattern`
* Fix false positive in `boxed_local` on trait implementations
* Fix false positive in `cmp_owned`
* Fix false positive in `collapsible_if` when conditionals have comments
* Fix false positive in `double_parens`
* Fix false positive in `excessive_precision`
* Fix false positive in `explicit_counter_loop`
* Fix false positive in `fn_to_numeric_cast_with_truncation`
* Fix false positive in `map_clone`
* Fix false positive in `new_ret_no_self`
* Fix false positive in `new_without_default` when `new` is unsafe
* Fix false positive in `type_complexity` when using extern types
* Fix false positive in `useless_format`
* Fix false positive in `wrong_self_convention`
* Fix incorrect suggestion for `excessive_precision`
* Fix incorrect suggestion for `expect_fun_call`
* Fix incorrect suggestion for `get_unwrap`
* Fix incorrect suggestion for `useless_format`
* `fn_to_numeric_cast_with_truncation` lint can be disabled again
* Improve suggestions for `manual_memcpy`
* Improve help message for `needless_lifetimes`
## Rust 1.30
Released 2018-10-25
[14207503...125907ad](https://github.com/rust-lang/rust-clippy/compare/14207503...125907ad)
* Deprecate `assign_ops` lint
* New lints: [`mistyped_literal_suffixes`], [`ptr_offset_with_cast`],
[`needless_collect`], [`copy_iterator`]
* `cargo clippy -V` now includes the Clippy commit hash of the Rust
Clippy component
* Fix ICE in `implicit_hasher`
* Fix ICE when encountering `println!("{}" a);`
* Fix ICE when encountering a macro call in match statements
* Fix false positive in `default_trait_access`
* Fix false positive in `trivially_copy_pass_by_ref`
* Fix false positive in `similar_names`
* Fix false positive in `redundant_field_name`
* Fix false positive in `expect_fun_call`
* Fix false negative in `identity_conversion`
* Fix false negative in `explicit_counter_loop`
* Fix `range_plus_one` suggestion and false negative
* `print_with_newline` / `write_with_newline`: don't warn about string with several `\n`s in them
* Fix `useless_attribute` to also whitelist `unused_extern_crates`
* Fix incorrect suggestion for `single_char_pattern`
* Improve suggestion for `identity_conversion` lint
* Move `explicit_iter_loop` and `explicit_into_iter_loop` from `style` group to `pedantic`
* Move `range_plus_one` and `range_minus_one` from `nursery` group to `complexity`
* Move `shadow_unrelated` from `restriction` group to `pedantic`
* Move `indexing_slicing` from `pedantic` group to `restriction`
## Rust 1.29
Released 2018-09-13
[v0.0.212...14207503](https://github.com/rust-lang/rust-clippy/compare/v0.0.212...14207503)
* :tada: :tada: **Rust 1.29 is the first stable Rust that includes a bundled Clippy** :tada:
:tada:
You can now run `rustup component add clippy-preview` and then `cargo
clippy` to run Clippy. This should put an end to the continuous nightly
upgrades for Clippy users.
* Clippy now follows the Rust versioning scheme instead of its own
* Fix ICE when encountering a `while let (..) = x.iter()` construct
* Fix false positives in `use_self`
* Fix false positive in `trivially_copy_pass_by_ref`
* Fix false positive in `useless_attribute` lint
* Fix false positive in `print_literal`
* Fix `use_self` regressions
* Improve lint message for `neg_cmp_op_on_partial_ord`
* Improve suggestion highlight for `single_char_pattern`
* Improve suggestions for various print/write macro lints
* Improve website header
## 0.0.212 (2018-07-10)
* Rustup to *rustc 1.29.0-nightly (e06c87544 2018-07-06)*
## 0.0.211
* Rustup to *rustc 1.28.0-nightly (e3bf634e0 2018-06-28)*
## 0.0.210
* Rustup to *rustc 1.28.0-nightly (01cc982e9 2018-06-24)*
## 0.0.209
* Rustup to *rustc 1.28.0-nightly (523097979 2018-06-18)*
## 0.0.208
* Rustup to *rustc 1.28.0-nightly (86a8f1a63 2018-06-17)*
## 0.0.207
* Rustup to *rustc 1.28.0-nightly (2a0062974 2018-06-09)*
## 0.0.206
* Rustup to *rustc 1.28.0-nightly (5bf68db6e 2018-05-28)*
## 0.0.205
* Rustup to *rustc 1.28.0-nightly (990d8aa74 2018-05-25)*
* Rename `unused_lifetimes` to `extra_unused_lifetimes` because of naming conflict with new rustc lint
## 0.0.204
* Rustup to *rustc 1.28.0-nightly (71e87be38 2018-05-22)*
## 0.0.203
* Rustup to *rustc 1.28.0-nightly (a3085756e 2018-05-19)*
* Clippy attributes are now of the form `clippy::cyclomatic_complexity` instead of `clippy(cyclomatic_complexity)`
## 0.0.202
* Rustup to *rustc 1.28.0-nightly (952f344cd 2018-05-18)*
## 0.0.201
* Rustup to *rustc 1.27.0-nightly (2f2a11dfc 2018-05-16)*
## 0.0.200
* Rustup to *rustc 1.27.0-nightly (9fae15374 2018-05-13)*
## 0.0.199
* Rustup to *rustc 1.27.0-nightly (ff2ac35db 2018-05-12)*
## 0.0.198
* Rustup to *rustc 1.27.0-nightly (acd3871ba 2018-05-10)*
## 0.0.197
* Rustup to *rustc 1.27.0-nightly (428ea5f6b 2018-05-06)*
## 0.0.196
* Rustup to *rustc 1.27.0-nightly (e82261dfb 2018-05-03)*
## 0.0.195
* Rustup to *rustc 1.27.0-nightly (ac3c2288f 2018-04-18)*
## 0.0.194
* Rustup to *rustc 1.27.0-nightly (bd40cbbe1 2018-04-14)*
* New lints: [`cast_ptr_alignment`], [`transmute_ptr_to_ptr`], [`write_literal`], [`write_with_newline`], [`writeln_empty_string`]
## 0.0.193
* Rustup to *rustc 1.27.0-nightly (eeea94c11 2018-04-06)*
## 0.0.192
* Rustup to *rustc 1.27.0-nightly (fb44b4c0e 2018-04-04)*
* New lint: [`print_literal`]
## 0.0.191
* Rustup to *rustc 1.26.0-nightly (ae544ee1c 2018-03-29)*
* Lint audit; categorize lints as style, correctness, complexity, pedantic, nursery, restriction.
## 0.0.190
* Fix a bunch of intermittent cargo bugs
## 0.0.189
* Rustup to *rustc 1.26.0-nightly (5508b2714 2018-03-18)*
## 0.0.188
* Rustup to *rustc 1.26.0-nightly (392645394 2018-03-15)*
* New lint: [`while_immutable_condition`]
## 0.0.187
* Rustup to *rustc 1.26.0-nightly (322d7f7b9 2018-02-25)*
* New lints: [`redundant_field_names`], [`suspicious_arithmetic_impl`], [`suspicious_op_assign_impl`]
## 0.0.186
* Rustup to *rustc 1.25.0-nightly (0c6091fbd 2018-02-04)*
* Various false positive fixes
## 0.0.185
* Rustup to *rustc 1.25.0-nightly (56733bc9f 2018-02-01)*
* New lint: [`question_mark`]
## 0.0.184
* Rustup to *rustc 1.25.0-nightly (90eb44a58 2018-01-29)*
* New lints: [`double_comparisons`], [`empty_line_after_outer_attr`]
## 0.0.183
* Rustup to *rustc 1.25.0-nightly (21882aad7 2018-01-28)*
* New lint: [`misaligned_transmute`]
## 0.0.182
* Rustup to *rustc 1.25.0-nightly (a0dcecff9 2018-01-24)*
* New lint: [`decimal_literal_representation`]
## 0.0.181
* Rustup to *rustc 1.25.0-nightly (97520ccb1 2018-01-21)*
* New lints: [`else_if_without_else`], [`option_option`], [`unit_arg`], [`unnecessary_fold`]
* Removed `unit_expr`
* Various false positive fixes for [`needless_pass_by_value`]
## 0.0.180
* Rustup to *rustc 1.25.0-nightly (3f92e8d89 2018-01-14)*
## 0.0.179
* Rustup to *rustc 1.25.0-nightly (61452e506 2018-01-09)*
## 0.0.178
* Rustup to *rustc 1.25.0-nightly (ee220daca 2018-01-07)*
## 0.0.177
* Rustup to *rustc 1.24.0-nightly (250b49205 2017-12-21)*
* New lint: [`match_as_ref`]
## 0.0.176
* Rustup to *rustc 1.24.0-nightly (0077d128d 2017-12-14)*
## 0.0.175
* Rustup to *rustc 1.24.0-nightly (bb42071f6 2017-12-01)*
## 0.0.174
* Rustup to *rustc 1.23.0-nightly (63739ab7b 2017-11-21)*
## 0.0.173
* Rustup to *rustc 1.23.0-nightly (33374fa9d 2017-11-20)*
## 0.0.172
* Rustup to *rustc 1.23.0-nightly (d0f8e2913 2017-11-16)*
## 0.0.171
* Rustup to *rustc 1.23.0-nightly (ff0f5de3b 2017-11-14)*
## 0.0.170
* Rustup to *rustc 1.23.0-nightly (d6b06c63a 2017-11-09)*
## 0.0.169
* Rustup to *rustc 1.23.0-nightly (3b82e4c74 2017-11-05)*
* New lints: [`just_underscores_and_digits`], `result_map_unwrap_or_else`, [`transmute_bytes_to_str`]
## 0.0.168
* Rustup to *rustc 1.23.0-nightly (f0fe716db 2017-10-30)*
## 0.0.167
* Rustup to *rustc 1.23.0-nightly (90ef3372e 2017-10-29)*
* New lints: `const_static_lifetime`, [`erasing_op`], [`fallible_impl_from`], [`println_empty_string`], [`useless_asref`]
## 0.0.166
* Rustup to *rustc 1.22.0-nightly (b7960878b 2017-10-18)*
* New lints: [`explicit_write`], `identity_conversion`, [`implicit_hasher`], [`invalid_ref`], [`option_map_or_none`],
[`range_minus_one`], [`range_plus_one`], [`transmute_int_to_bool`], [`transmute_int_to_char`],
[`transmute_int_to_float`]
## 0.0.165
* Rust upgrade to rustc 1.22.0-nightly (0e6f4cf51 2017-09-27)
* New lint: [`mut_range_bound`]
## 0.0.164
* Update to *rustc 1.22.0-nightly (6c476ce46 2017-09-25)*
* New lint: [`int_plus_one`]
## 0.0.163
* Update to *rustc 1.22.0-nightly (14039a42a 2017-09-22)*
## 0.0.162
* Update to *rustc 1.22.0-nightly (0701b37d9 2017-09-18)*
* New lint: [`chars_last_cmp`]
* Improved suggestions for [`needless_borrow`], [`ptr_arg`],
## 0.0.161
* Update to *rustc 1.22.0-nightly (539f2083d 2017-09-13)*
## 0.0.160
* Update to *rustc 1.22.0-nightly (dd08c3070 2017-09-12)*
## 0.0.159
* Update to *rustc 1.22.0-nightly (eba374fb2 2017-09-11)*
* New lint: [`clone_on_ref_ptr`]
## 0.0.158
* New lint: [`manual_memcpy`]
* [`cast_lossless`] no longer has redundant parentheses in its suggestions
* Update to *rustc 1.22.0-nightly (dead08cb3 2017-09-08)*
## 0.0.157 - 2017-09-04
* Update to *rustc 1.22.0-nightly (981ce7d8d 2017-09-03)*
* New lint: `unit_expr`
## 0.0.156 - 2017-09-03
* Update to *rustc 1.22.0-nightly (744dd6c1d 2017-09-02)*
## 0.0.155
* Update to *rustc 1.21.0-nightly (c11f689d2 2017-08-29)*
* New lint: [`infinite_iter`], [`maybe_infinite_iter`], [`cast_lossless`]
## 0.0.154
* Update to *rustc 1.21.0-nightly (2c0558f63 2017-08-24)*
* Fix [`use_self`] triggering inside derives
* Add support for linting an entire workspace with `cargo clippy --all`
* New lint: [`naive_bytecount`]
## 0.0.153
* Update to *rustc 1.21.0-nightly (8c303ed87 2017-08-20)*
* New lint: [`use_self`]
## 0.0.152
* Update to *rustc 1.21.0-nightly (df511d554 2017-08-14)*
## 0.0.151
* Update to *rustc 1.21.0-nightly (13d94d5fa 2017-08-10)*
## 0.0.150
* Update to *rustc 1.21.0-nightly (215e0b10e 2017-08-08)*
## 0.0.148
* Update to *rustc 1.21.0-nightly (37c7d0ebb 2017-07-31)*
* New lints: [`unreadable_literal`], [`inconsistent_digit_grouping`], [`large_digit_groups`]
## 0.0.147
* Update to *rustc 1.21.0-nightly (aac223f4f 2017-07-30)*
## 0.0.146
* Update to *rustc 1.21.0-nightly (52a330969 2017-07-27)*
* Fixes false positives in `inline_always`
* Fixes false negatives in `panic_params`
## 0.0.145
* Update to *rustc 1.20.0-nightly (afe145d22 2017-07-23)*
## 0.0.144
* Update to *rustc 1.20.0-nightly (086eaa78e 2017-07-15)*
## 0.0.143
* Update to *rustc 1.20.0-nightly (d84693b93 2017-07-09)*
* Fix `cargo clippy` crashing on `dylib` projects
* Fix false positives around `nested_while_let` and `never_loop`
## 0.0.142
* Update to *rustc 1.20.0-nightly (067971139 2017-07-02)*
## 0.0.141
* Rewrite of the `doc_markdown` lint.
* Deprecated [`range_step_by_zero`]
* New lint: [`iterator_step_by_zero`]
* New lint: [`needless_borrowed_reference`]
* Update to *rustc 1.20.0-nightly (69c65d296 2017-06-28)*
## 0.0.140 - 2017-06-16
* Update to *rustc 1.19.0-nightly (258ae6dd9 2017-06-15)*
## 0.0.139 — 2017-06-10
* Update to *rustc 1.19.0-nightly (4bf5c99af 2017-06-10)*
* Fix bugs with for loop desugaring
* Check for [`AsRef`]/[`AsMut`] arguments in [`wrong_self_convention`]
## 0.0.138 — 2017-06-05
* Update to *rustc 1.19.0-nightly (0418fa9d3 2017-06-04)*
## 0.0.137 — 2017-06-05
* Update to *rustc 1.19.0-nightly (6684d176c 2017-06-03)*
## 0.0.136 — 2017—05—26
* Update to *rustc 1.19.0-nightly (557967766 2017-05-26)*
## 0.0.135 — 2017—05—24
* Update to *rustc 1.19.0-nightly (5b13bff52 2017-05-23)*
## 0.0.134 — 2017—05—19
* Update to *rustc 1.19.0-nightly (0ed1ec9f9 2017-05-18)*
## 0.0.133 — 2017—05—14
* Update to *rustc 1.19.0-nightly (826d8f385 2017-05-13)*
## 0.0.132 — 2017—05—05
* Fix various bugs and some ices
## 0.0.131 — 2017—05—04
* Update to *rustc 1.19.0-nightly (2d4ed8e0c 2017-05-03)*
## 0.0.130 — 2017—05—03
* Update to *rustc 1.19.0-nightly (6a5fc9eec 2017-05-02)*
## 0.0.129 — 2017-05-01
* Update to *rustc 1.19.0-nightly (06fb4d256 2017-04-30)*
## 0.0.128 — 2017-04-28
* Update to *rustc 1.18.0-nightly (94e884b63 2017-04-27)*
## 0.0.127 — 2017-04-27
* Update to *rustc 1.18.0-nightly (036983201 2017-04-26)*
* New lint: [`needless_continue`]
## 0.0.126 — 2017-04-24
* Update to *rustc 1.18.0-nightly (2bd4b5c6d 2017-04-23)*
## 0.0.125 — 2017-04-19
* Update to *rustc 1.18.0-nightly (9f2abadca 2017-04-18)*
## 0.0.124 — 2017-04-16
* Update to *rustc 1.18.0-nightly (d5cf1cb64 2017-04-15)*
## 0.0.123 — 2017-04-07
* Fix various false positives
## 0.0.122 — 2017-04-07
* Rustup to *rustc 1.18.0-nightly (91ae22a01 2017-04-05)*
* New lint: [`op_ref`]
## 0.0.121 — 2017-03-21
* Rustup to *rustc 1.17.0-nightly (134c4a0f0 2017-03-20)*
## 0.0.120 — 2017-03-17
* Rustup to *rustc 1.17.0-nightly (0aeb9c129 2017-03-15)*
## 0.0.119 — 2017-03-13
* Rustup to *rustc 1.17.0-nightly (824c9ebbd 2017-03-12)*
## 0.0.118 — 2017-03-05
* Rustup to *rustc 1.17.0-nightly (b1e31766d 2017-03-03)*
## 0.0.117 — 2017-03-01
* Rustup to *rustc 1.17.0-nightly (be760566c 2017-02-28)*
## 0.0.116 — 2017-02-28
* Fix `cargo clippy` on 64 bit windows systems
## 0.0.115 — 2017-02-27
* Rustup to *rustc 1.17.0-nightly (60a0edc6c 2017-02-26)*
* New lints: [`zero_ptr`], [`never_loop`], [`mut_from_ref`]
## 0.0.114 — 2017-02-08
* Rustup to *rustc 1.17.0-nightly (c49d10207 2017-02-07)*
* Tests are now ui tests (testing the exact output of rustc)
## 0.0.113 — 2017-02-04
* Rustup to *rustc 1.16.0-nightly (eedaa94e3 2017-02-02)*
* New lint: [`large_enum_variant`]
* `explicit_into_iter_loop` provides suggestions
## 0.0.112 — 2017-01-27
* Rustup to *rustc 1.16.0-nightly (df8debf6d 2017-01-25)*
## 0.0.111 — 2017-01-21
* Rustup to *rustc 1.16.0-nightly (a52da95ce 2017-01-20)*
## 0.0.110 — 2017-01-20
* Add badges and categories to `Cargo.toml`
## 0.0.109 — 2017-01-19
* Update to *rustc 1.16.0-nightly (c07a6ae77 2017-01-17)*
## 0.0.108 — 2017-01-12
* Update to *rustc 1.16.0-nightly (2782e8f8f 2017-01-12)*
## 0.0.107 — 2017-01-11
* Update regex dependency
* Fix FP when matching `&&mut` by `&ref`
* Reintroduce `for (_, x) in &mut hash_map` -> `for x in hash_map.values_mut()`
* New lints: [`unused_io_amount`], [`forget_ref`], [`short_circuit_statement`]
## 0.0.106 — 2017-01-04
* Fix FP introduced by rustup in [`wrong_self_convention`]
## 0.0.105 — 2017-01-04
* Update to *rustc 1.16.0-nightly (468227129 2017-01-03)*
* New lints: [`deref_addrof`], [`double_parens`], [`pub_enum_variant_names`]
* Fix suggestion in [`new_without_default`]
* FP fix in [`absurd_extreme_comparisons`]
## 0.0.104 — 2016-12-15
* Update to *rustc 1.15.0-nightly (8f02c429a 2016-12-15)*
## 0.0.103 — 2016-11-25
* Update to *rustc 1.15.0-nightly (d5814b03e 2016-11-23)*
## 0.0.102 — 2016-11-24
* Update to *rustc 1.15.0-nightly (3bf2be9ce 2016-11-22)*
## 0.0.101 — 2016-11-23
* Update to *rustc 1.15.0-nightly (7b3eeea22 2016-11-21)*
* New lint: [`string_extend_chars`]
## 0.0.100 — 2016-11-20
* Update to *rustc 1.15.0-nightly (ac635aa95 2016-11-18)*
## 0.0.99 — 2016-11-18
* Update to rustc 1.15.0-nightly (0ed951993 2016-11-14)
* New lint: [`get_unwrap`]
## 0.0.98 — 2016-11-08
* Fixes an issue due to a change in how cargo handles `--sysroot`, which broke `cargo clippy`
## 0.0.97 — 2016-11-03
* For convenience, `cargo clippy` defines a `cargo-clippy` feature. This was
previously added for a short time under the name `clippy` but removed for
compatibility.
* `cargo clippy --help` is more helping (and less helpful :smile:)
* Rustup to *rustc 1.14.0-nightly (5665bdf3e 2016-11-02)*
* New lints: [`if_let_redundant_pattern_matching`], [`partialeq_ne_impl`]
## 0.0.96 — 2016-10-22
* Rustup to *rustc 1.14.0-nightly (f09420685 2016-10-20)*
* New lint: [`iter_skip_next`]
## 0.0.95 — 2016-10-06
* Rustup to *rustc 1.14.0-nightly (3210fd5c2 2016-10-05)*
## 0.0.94 — 2016-10-04
* Fixes bustage on Windows due to forbidden directory name
## 0.0.93 — 2016-10-03
* Rustup to *rustc 1.14.0-nightly (144af3e97 2016-10-02)*
* `option_map_unwrap_or` and `option_map_unwrap_or_else` are now
allowed by default.
* New lint: [`explicit_into_iter_loop`]
## 0.0.92 — 2016-09-30
* Rustup to *rustc 1.14.0-nightly (289f3a4ca 2016-09-29)*
## 0.0.91 — 2016-09-28
* Rustup to *rustc 1.13.0-nightly (d0623cf7b 2016-09-26)*
## 0.0.90 — 2016-09-09
* Rustup to *rustc 1.13.0-nightly (f1f40f850 2016-09-09)*
## 0.0.89 — 2016-09-06
* Rustup to *rustc 1.13.0-nightly (cbe4de78e 2016-09-05)*
## 0.0.88 — 2016-09-04
* Rustup to *rustc 1.13.0-nightly (70598e04f 2016-09-03)*
* The following lints are not new but were only usable through the `clippy`
lint groups: [`filter_next`], `for_loop_over_option`,
`for_loop_over_result` and [`match_overlapping_arm`]. You should now be
able to `#[allow/deny]` them individually and they are available directly
through `cargo clippy`.
## 0.0.87 — 2016-08-31
* Rustup to *rustc 1.13.0-nightly (eac41469d 2016-08-30)*
* New lints: [`builtin_type_shadow`]
* Fix FP in [`zero_prefixed_literal`] and `0b`/`0o`
## 0.0.86 — 2016-08-28
* Rustup to *rustc 1.13.0-nightly (a23064af5 2016-08-27)*
* New lints: [`missing_docs_in_private_items`], [`zero_prefixed_literal`]
## 0.0.85 — 2016-08-19
* Fix ICE with [`useless_attribute`]
* [`useless_attribute`] ignores `unused_imports` on `use` statements
## 0.0.84 — 2016-08-18
* Rustup to *rustc 1.13.0-nightly (aef6971ca 2016-08-17)*
## 0.0.83 — 2016-08-17
* Rustup to *rustc 1.12.0-nightly (1bf5fa326 2016-08-16)*
* New lints: [`print_with_newline`], [`useless_attribute`]
## 0.0.82 — 2016-08-17
* Rustup to *rustc 1.12.0-nightly (197be89f3 2016-08-15)*
* New lint: [`module_inception`]
## 0.0.81 — 2016-08-14
* Rustup to *rustc 1.12.0-nightly (1deb02ea6 2016-08-12)*
* New lints: [`eval_order_dependence`], [`mixed_case_hex_literals`], [`unseparated_literal_suffix`]
* False positive fix in [`too_many_arguments`]
* Addition of functionality to [`needless_borrow`]
* Suggestions for [`clone_on_copy`]
* Bug fix in [`wrong_self_convention`]
* Doc improvements
## 0.0.80 — 2016-07-31
* Rustup to *rustc 1.12.0-nightly (1225e122f 2016-07-30)*
* New lints: [`misrefactored_assign_op`], [`serde_api_misuse`]
## 0.0.79 — 2016-07-10
* Rustup to *rustc 1.12.0-nightly (f93aaf84c 2016-07-09)*
* Major suggestions refactoring
## 0.0.78 — 2016-07-02
* Rustup to *rustc 1.11.0-nightly (01411937f 2016-07-01)*
* New lints: [`wrong_transmute`], [`double_neg`], [`filter_map`]
* For compatibility, `cargo clippy` does not defines the `clippy` feature
introduced in 0.0.76 anymore
* [`collapsible_if`] now considers `if let`
## 0.0.77 — 2016-06-21
* Rustup to *rustc 1.11.0-nightly (5522e678b 2016-06-20)*
* New lints: `stutter` and [`iter_nth`]
## 0.0.76 — 2016-06-10
* Rustup to *rustc 1.11.0-nightly (7d2f75a95 2016-06-09)*
* `cargo clippy` now automatically defines the `clippy` feature
* New lint: [`not_unsafe_ptr_arg_deref`]
## 0.0.75 — 2016-06-08
* Rustup to *rustc 1.11.0-nightly (763f9234b 2016-06-06)*
## 0.0.74 — 2016-06-07
* Fix bug with `cargo-clippy` JSON parsing
* Add the `CLIPPY_DISABLE_DOCS_LINKS` environment variable to deactivate the
“for further information visit *lint-link*” message.
## 0.0.73 — 2016-06-05
* Fix false positives in [`useless_let_if_seq`]
## 0.0.72 — 2016-06-04
* Fix false positives in [`useless_let_if_seq`]
## 0.0.71 — 2016-05-31
* Rustup to *rustc 1.11.0-nightly (a967611d8 2016-05-30)*
* New lint: [`useless_let_if_seq`]
## 0.0.70 — 2016-05-28
* Rustup to *rustc 1.10.0-nightly (7bddce693 2016-05-27)*
* [`invalid_regex`] and [`trivial_regex`] can now warn on `RegexSet::new`,
`RegexBuilder::new` and byte regexes
## 0.0.69 — 2016-05-20
* Rustup to *rustc 1.10.0-nightly (476fe6eef 2016-05-21)*
* [`used_underscore_binding`] has been made `Allow` temporarily
## 0.0.68 — 2016-05-17
* Rustup to *rustc 1.10.0-nightly (cd6a40017 2016-05-16)*
* New lint: [`unnecessary_operation`]
## 0.0.67 — 2016-05-12
* Rustup to *rustc 1.10.0-nightly (22ac88f1a 2016-05-11)*
## 0.0.66 — 2016-05-11
* New `cargo clippy` subcommand
* New lints: [`assign_op_pattern`], [`assign_ops`], [`needless_borrow`]
## 0.0.65 — 2016-05-08
* Rustup to *rustc 1.10.0-nightly (62e2b2fb7 2016-05-06)*
* New lints: [`float_arithmetic`], [`integer_arithmetic`]
## 0.0.64 — 2016-04-26
* Rustup to *rustc 1.10.0-nightly (645dd013a 2016-04-24)*
* New lints: [`temporary_cstring_as_ptr`], [`unsafe_removed_from_name`], and [`mem_forget`]
## 0.0.63 — 2016-04-08
* Rustup to *rustc 1.9.0-nightly (7979dd608 2016-04-07)*
## 0.0.62 — 2016-04-07
* Rustup to *rustc 1.9.0-nightly (bf5da36f1 2016-04-06)*
## 0.0.61 — 2016-04-03
* Rustup to *rustc 1.9.0-nightly (5ab11d72c 2016-04-02)*
* New lint: [`invalid_upcast_comparisons`]
## 0.0.60 — 2016-04-01
* Rustup to *rustc 1.9.0-nightly (e1195c24b 2016-03-31)*
## 0.0.59 — 2016-03-31
* Rustup to *rustc 1.9.0-nightly (30a3849f2 2016-03-30)*
* New lints: [`logic_bug`], [`nonminimal_bool`]
* Fixed: [`match_same_arms`] now ignores arms with guards
* Improved: [`useless_vec`] now warns on `for … in vec![…]`
## 0.0.58 — 2016-03-27
* Rustup to *rustc 1.9.0-nightly (d5a91e695 2016-03-26)*
* New lint: [`doc_markdown`]
## 0.0.57 — 2016-03-27
* Update to *rustc 1.9.0-nightly (a1e29daf1 2016-03-25)*
* Deprecated lints: [`str_to_string`], [`string_to_string`], [`unstable_as_slice`], [`unstable_as_mut_slice`]
* New lint: [`crosspointer_transmute`]
## 0.0.56 — 2016-03-23
* Update to *rustc 1.9.0-nightly (0dcc413e4 2016-03-22)*
* New lints: [`many_single_char_names`] and [`similar_names`]
## 0.0.55 — 2016-03-21
* Update to *rustc 1.9.0-nightly (02310fd31 2016-03-19)*
## 0.0.54 — 2016-03-16
* Update to *rustc 1.9.0-nightly (c66d2380a 2016-03-15)*
## 0.0.53 — 2016-03-15
* Add a [configuration file]
## ~~0.0.52~~
## 0.0.51 — 2016-03-13
* Add `str` to types considered by [`len_zero`]
* New lints: [`indexing_slicing`]
## 0.0.50 — 2016-03-11
* Update to *rustc 1.9.0-nightly (c9629d61c 2016-03-10)*
## 0.0.49 — 2016-03-09
* Update to *rustc 1.9.0-nightly (eabfc160f 2016-03-08)*
* New lints: [`overflow_check_conditional`], [`unused_label`], [`new_without_default`]
## 0.0.48 — 2016-03-07
* Fixed: ICE in [`needless_range_loop`] with globals
## 0.0.47 — 2016-03-07
* Update to *rustc 1.9.0-nightly (998a6720b 2016-03-07)*
* New lint: [`redundant_closure_call`]
[`AsMut`]: https://doc.rust-lang.org/std/convert/trait.AsMut.html
[`AsRef`]: https://doc.rust-lang.org/std/convert/trait.AsRef.html
[configuration file]: ./rust-clippy#configuration
[pull3665]: https://github.com/rust-lang/rust-clippy/pull/3665
[adding_lints]: https://github.com/rust-lang/rust-clippy/blob/master/doc/adding_lints.md
<!-- lint disable no-unused-definitions -->
<!-- begin autogenerated links to lint list -->
[`absurd_extreme_comparisons`]: https://rust-lang.github.io/rust-clippy/master/index.html#absurd_extreme_comparisons
[`almost_swapped`]: https://rust-lang.github.io/rust-clippy/master/index.html#almost_swapped
[`approx_constant`]: https://rust-lang.github.io/rust-clippy/master/index.html#approx_constant
[`as_conversions`]: https://rust-lang.github.io/rust-clippy/master/index.html#as_conversions
[`assertions_on_constants`]: https://rust-lang.github.io/rust-clippy/master/index.html#assertions_on_constants
[`assign_op_pattern`]: https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[`assign_ops`]: https://rust-lang.github.io/rust-clippy/master/index.html#assign_ops
[`async_yields_async`]: https://rust-lang.github.io/rust-clippy/master/index.html#async_yields_async
[`await_holding_lock`]: https://rust-lang.github.io/rust-clippy/master/index.html#await_holding_lock
[`await_holding_refcell_ref`]: https://rust-lang.github.io/rust-clippy/master/index.html#await_holding_refcell_ref
[`bad_bit_mask`]: https://rust-lang.github.io/rust-clippy/master/index.html#bad_bit_mask
[`bind_instead_of_map`]: https://rust-lang.github.io/rust-clippy/master/index.html#bind_instead_of_map
[`blacklisted_name`]: https://rust-lang.github.io/rust-clippy/master/index.html#blacklisted_name
[`blanket_clippy_restriction_lints`]: https://rust-lang.github.io/rust-clippy/master/index.html#blanket_clippy_restriction_lints
[`blocks_in_if_conditions`]: https://rust-lang.github.io/rust-clippy/master/index.html#blocks_in_if_conditions
[`bool_comparison`]: https://rust-lang.github.io/rust-clippy/master/index.html#bool_comparison
[`borrow_interior_mutable_const`]: https://rust-lang.github.io/rust-clippy/master/index.html#borrow_interior_mutable_const
[`borrowed_box`]: https://rust-lang.github.io/rust-clippy/master/index.html#borrowed_box
[`box_vec`]: https://rust-lang.github.io/rust-clippy/master/index.html#box_vec
[`boxed_local`]: https://rust-lang.github.io/rust-clippy/master/index.html#boxed_local
[`builtin_type_shadow`]: https://rust-lang.github.io/rust-clippy/master/index.html#builtin_type_shadow
[`bytes_nth`]: https://rust-lang.github.io/rust-clippy/master/index.html#bytes_nth
[`cargo_common_metadata`]: https://rust-lang.github.io/rust-clippy/master/index.html#cargo_common_metadata
[`case_sensitive_file_extension_comparisons`]: https://rust-lang.github.io/rust-clippy/master/index.html#case_sensitive_file_extension_comparisons
[`cast_lossless`]: https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[`cast_possible_truncation`]: https://rust-lang.github.io/rust-clippy/master/index.html#cast_possible_truncation
[`cast_possible_wrap`]: https://rust-lang.github.io/rust-clippy/master/index.html#cast_possible_wrap
[`cast_precision_loss`]: https://rust-lang.github.io/rust-clippy/master/index.html#cast_precision_loss
[`cast_ptr_alignment`]: https://rust-lang.github.io/rust-clippy/master/index.html#cast_ptr_alignment
[`cast_ref_to_mut`]: https://rust-lang.github.io/rust-clippy/master/index.html#cast_ref_to_mut
[`cast_sign_loss`]: https://rust-lang.github.io/rust-clippy/master/index.html#cast_sign_loss
[`char_lit_as_u8`]: https://rust-lang.github.io/rust-clippy/master/index.html#char_lit_as_u8
[`chars_last_cmp`]: https://rust-lang.github.io/rust-clippy/master/index.html#chars_last_cmp
[`chars_next_cmp`]: https://rust-lang.github.io/rust-clippy/master/index.html#chars_next_cmp
[`checked_conversions`]: https://rust-lang.github.io/rust-clippy/master/index.html#checked_conversions
[`clone_double_ref`]: https://rust-lang.github.io/rust-clippy/master/index.html#clone_double_ref
[`clone_on_copy`]: https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[`clone_on_ref_ptr`]: https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_ref_ptr
[`cmp_nan`]: https://rust-lang.github.io/rust-clippy/master/index.html#cmp_nan
[`cmp_null`]: https://rust-lang.github.io/rust-clippy/master/index.html#cmp_null
[`cmp_owned`]: https://rust-lang.github.io/rust-clippy/master/index.html#cmp_owned
[`cognitive_complexity`]: https://rust-lang.github.io/rust-clippy/master/index.html#cognitive_complexity
[`collapsible_else_if`]: https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_else_if
[`collapsible_if`]: https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
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