Changelog

All notable changes to this project will be documented in this file. See Changelog Update if you want to update this document.

Unreleased / In Rust Nightly

74d1561...master

Rust 1.55

Current beta, release 2021-09-09

3ae8faf...74d1561

Important Changes

Stabilized cargo clippy --fix 🎉 #7405

New Lints

Moves and Deprecations

Moved from_iter_instead_of_collect to pedantic #7375
Added suspicious as a new lint group for code that is most likely wrong or useless #7350
- Moved blanket_clippy_restriction_lints to suspicious
- Moved empty_loop to suspicious
- Moved eval_order_dependence to suspicious
- Moved float_equality_without_abs to suspicious
- Moved for_loops_over_fallibles to suspicious
- Moved misrefactored_assign_op to suspicious
- Moved mut_range_bound to suspicious
- Moved mutable_key_type to suspicious
- Moved suspicious_arithmetic_impl to suspicious
- Moved suspicious_assignment_formatting to suspicious
- Moved suspicious_else_formatting to suspicious
- Moved suspicious_map to suspicious
- Moved suspicious_op_assign_impl to suspicious
- Moved suspicious_unary_op_formatting to suspicious

Enhancements

while_let_on_iterator: Now suggests &mut iter inside closures #7262
doc_markdown:
- Now detects unbalanced ticks #7357
- Add FreeBSD to the default configuration as an allowed identifier #7334
wildcard_enum_match_arm, match_wildcard_for_single_variants: Now allows wildcards for enums with unstable or hidden variants #7407
redundant_allocation: Now additionally supports the Arc<> type #7308
blacklisted_name: Now allows blacklisted names in test code #7379
redundant_closure: Suggests &mut for FnMut #7437
disallowed_method, disallowed_type: The configuration values disallowed-method and disallowed-type no longer require fully qualified paths #7345
zst_offset: Fixed lint invocation after it was accidentally suppressed #7396

False Positive Fixes

default_numeric_fallback: No longer lints on float literals as function arguments #7446
use_self: No longer lints on type parameters #7288
unimplemented: Now ignores the assert and debug_assert macros #7439
branches_sharing_code: Now always checks for block expressions #7462
field_reassign_with_default: No longer triggers in macros #7160
redundant_clone: No longer lints on required clones for borrowed data #7346
default_numeric_fallback: No longer triggers in external macros #7325
needless_bool: No longer lints in macros #7442
useless_format: No longer triggers when additional text is being appended #7442
assertions_on_constants: cfg!(...) is no longer considered to be a constant #7319

Suggestion Fixes/Improvements

needless_collect: Now show correct lint messages for shadowed values #7289
wrong_pub_self_convention: The deprecated message now suggest the correct configuration value #7382
semicolon_if_nothing_returned: Allow missing semicolon in blocks with only one expression #7326

ICE Fixes

Documentation Improvements

Reworked Clippy's website: #7279 #7172
- Added applicability information about lints
- Added a link to jump into the implementation
- Improved loading times
- Adapted some styling
Clippy now uses a lint to generate its documentation #7298

Rust 1.54

Current stable, released 2021-07-29

7c7683c...3ae8faf

New Lints

Moves and Deprecations

Deprecate pub_enum_variant_names and wrong_pub_self_convention in favor of the new avoid-breaking-exported-api config option (see Enhancements) #7187
Move inconsistent_struct_constructor to pedantic #7193
Move needless_borrow to style (now warn-by-default) #7254
Move suspicious_operation_groupings to nursery #7266
Move semicolon_if_nothing_returned to pedantic #7268

Enhancements

while_let_on_iterator: Now also lints in nested loops #6966
single_char_pattern: Now also lints on strip_prefix and strip_suffix #7156
needless_collect: Now also lints on assignments with type annotations #7163
if_then_some_else_none: Now works with the MSRV config #7177
Add avoid-breaking-exported-api config option for the lints enum_variant_names, large_types_passed_by_value, trivially_copy_pass_by_ref, unnecessary_wraps, upper_case_acronyms, and wrong_self_convention. We recommend to set this configuration option to false before a major release (1.0/2.0/...) to clean up the API #7187
needless_collect: Now lints on even more data structures #7188
missing_docs_in_private_items: No longer sees #[<name> = "<value>"] like attributes as sufficient documentation #7281
needless_collect, short_circuit_statement, unnecessary_operation: Now work as expected when used with allow #7282

False Positive Fixes

implicit_return: Now takes all diverging functions in account to avoid false positives #6951
while_let_on_iterator: No longer lints when the iterator is a struct field and the struct is used in the loop #6966
multiple_inherent_impl: No longer lints with generic arguments #7089
comparison_chain: No longer lints in a const context #7118
while_immutable_condition: Fix false positive where mutation in the loop variable wasn't picked up #7144
default_trait_access: No longer lints in macros #7150
needless_question_mark: No longer lints when the inner value is implicitly dereferenced #7165
unused_unit: No longer lints when multiple macro contexts are involved #7167
eval_order_dependence: Fix false positive in async context #7174
unnecessary_filter_map: No longer lints if the filter_map changes the type #7175
wrong_self_convention: No longer lints in trait implementations of non-Copy types #7182
suboptimal_flops: No longer lints on powi(2) #7201
wrong_self_convention: No longer lints if there is no implicit self #7215
option_if_let_else: No longer lints on else if let pattern #7216
use_self, useless_conversion: Fix false positives when generic arguments are involved #7223
manual_unwrap_or: Fix false positive with deref coercion #7233
similar_names: No longer lints on wparam/lparam #7255
redundant_closure: No longer lints on using the vec![] macro in a closure #7263

Suggestion Fixes/Improvements

implicit_return #6951
- Fix suggestion for async functions
- Improve suggestion with macros
- Suggest to change break to return when appropriate
while_let_on_iterator: Now suggests &mut iter when necessary #6966
match_single_binding: Improve suggestion when match scrutinee has side effects #7095
needless_borrow: Now suggests to also change usage sites as needed #7105
write_with_newline: Improve suggestion when only \n is written to the buffer #7183
from_iter_instead_of_collect: The suggestion is now auto applicable also when a <_ as Trait>::_ is involved #7264
not_unsafe_ptr_arg_deref: Improved error message #7294

ICE Fixes

Fix ICE when running Clippy on libstd #7140
implicit_return #7242

Rust 1.53

Released 2021-06-17

6ed6f1e...7c7683c

New Lints

Moves and Deprecations

Deprecate filter_map lint #7059
Move transmute_ptr_to_ptr to pedantic #7102

Enhancements

mem_replace_with_default: Also lint on common std constructors #6820
wrong_self_convention: Also lint on to_*_mut methods #6828
wildcard_enum_match_arm, match_wildcard_for_single_variants: #6863
- Attempt to find a common path prefix in suggestion
- Don't lint on Option and Result
- Consider Self prefix
explicit_deref_methods: Also lint on chained deref calls #6865
or_fun_call: Also lint on unsafe blocks #6928
vec_box, linkedlist, option_option: Also lint in const and static items #6938
search_is_some: Also check for is_none #6942
string_lit_as_bytes: Also lint on into_bytes #6959
len_without_is_empty: Also lint if function signatures of len and is_empty don't match #6980
redundant_pattern_matching: Also lint if the pattern is a & pattern #6991
clone_on_copy: Also lint on chained method calls taking self by value #7000
missing_panics_doc: Also lint on assert_eq! and assert_ne! #7029
needless_return: Also lint in async functions #7067
unused_io_amount: Also lint on expressions like _.read().ok()? #7100
iter_cloned_collect: Also lint on large arrays, since const-generics are now stable #7138

False Positive Fixes

upper_case_acronyms: No longer lints on public items #6805
suspicious_map: No longer lints when side effects may occur inside the map call #6831
manual_map, manual_unwrap_or: No longer lints in const functions #6917
wrong_self_convention: Now respects Copy types #6924
needless_question_mark: No longer lints if the ? and the Some(..) come from different macro contexts #6935
map_entry: Better detect if the entry API can be used #6937
or_fun_call: No longer lints on some len function calls #6950
new_ret_no_self: No longer lints when Self is returned with different generic arguments #6952
upper_case_acronyms: No longer lints on public items #6981
explicit_into_iter_loop: Only lint when into_iter is an implementation of IntoIterator #6982
expl_impl_clone_on_copy: Take generic constraints into account before suggesting to use derive instead #6993
missing_panics_doc: No longer lints when only debug-assertions are used #6996
clone_on_copy: Only lint when using the Clone trait #7000
wrong_self_convention: No longer lints inside a trait implementation #7002
redundant_clone: No longer lints when the cloned value is modified while the clone is in use #7011
same_item_push: No longer lints if the Vec is used in the loop body #7018
cargo_common_metadata: Remove author requirement #7026
panic_in_result_fn: No longer lints on debug_assert family #7060
panic: No longer wrongfully lints on debug_assert with message #7063
wrong_self_convention: No longer lints in trait implementations where no self is involved #7064
missing_const_for_fn: No longer lints when unstable const function is involved #7076
suspicious_else_formatting: Allow Allman style braces #7087
inconsistent_struct_constructor: No longer lints in macros #7097
single_component_path_imports: No longer lints on macro re-exports #7120

Suggestion Fixes/Improvements

redundant_pattern_matching: Add a note when applying this lint would change the drop order #6568
write_literal, print_literal: Add auto-applicable suggestion #6821
manual_map: Fix suggestion for complex if let ... else chains #6856
inconsistent_struct_constructor: Make lint description and message clearer #6892
map_entry: Now suggests or_insert, insert_with or match _.entry(_) as appropriate #6937
manual_flatten: Suggest to insert copied if necessary #6962
redundant_slicing: Fix suggestion when a re-borrow might be required or when the value is from a macro call #6975
match_wildcard_for_single_variants: Fix suggestion for hidden variant #6988
clone_on_copy: Correct suggestion when the cloned value is a macro call #7000
manual_map: Fix suggestion at the end of an if chain #7004
Fix needless parenthesis output in multiple lint suggestions #7013
needless_collect: Better explanation in the lint message #7020
useless_vec: Now considers mutability #7036
useless_format: Wrap the content in braces if necessary #7092
single_match: Don't suggest an equality check for types which don't implement PartialEq #7093
from_over_into: Mention type in help message #7099
manual_unwrap_or: Fix invalid code suggestion due to a macro call #7136

ICE Fixes

Others

Clippy's lint list now supports themes #7030
Lints that were uplifted to rustc now mention the new rustc name in the deprecation warning #7056

Rust 1.52

Released 2021-05-06

3e41797...6ed6f1e

New Lints

Moves and Deprecations

Moved upper_case_acronyms to pedantic #6775
Moved manual_map to nursery #6796
Moved unnecessary_wraps to pedantic #6765
Moved trivial_regex to nursery #6696
Moved naive_bytecount to pedantic #6825
Moved upper_case_acronyms to style #6788
Moved manual_map to style #6801

Enhancements

disallowed_method: Now supports functions in addition to methods #6674
upper_case_acronyms: Added a new configuration upper-case-acronyms-aggressive to trigger the lint if there is more than one uppercase character next to each other #6788
collapsible_match: Now supports block comparison with different value names #6754
unnecessary_wraps: Will now suggest removing unnecessary wrapped return unit type, like Option<()> #6665
Improved value usage detection in closures #6698

False Positive Fixes

use_self: No longer lints in macros #6833
use_self: Fixed multiple false positives for: generics, associated types and derive implementations #6179
missing_inline_in_public_items: No longer lints for procedural macros #6814
inherent_to_string: No longer lints on functions with function generics #6771
doc_markdown: Add OpenDNS to the default configuration as an allowed identifier #6783
missing_panics_doc: No longer lints on unreachable! #6700
collapsible_if: No longer lints on if statements with attributes #6701
match_same_arms: Only considers empty blocks as equal if the tokens contained are the same #6843
redundant_closure: Now ignores macros #6871
manual_map: Fixed false positives when control flow statements like return, break etc. are used #6801
vec_init_then_push: Fixed false positives for loops and if statements #6697
len_without_is_empty: Will now consider multiple impl blocks and #[allow] on the len method as well as the type definition. #6853
let_underscore_drop: Only lints on types which implement Drop #6682
unit_arg: No longer lints on unit arguments when they come from a path expression. #6601
cargo_common_metadata: No longer lints if publish = false is defined in the manifest #6650

Suggestion Fixes/Improvements

collapsible_match: Fixed lint message capitalization #6766
or_fun_call: Improved suggestions for or_insert(vec![]) #6790
manual_map: No longer expands macros in the suggestions #6801
Aligned Clippy's lint messages with the rustc dev guide #6787

ICE Fixes

zero_sized_map_values #6866

Documentation Improvements

useless_format: Improved the documentation example #6854
Clippy's README.md: Includes a new subsection on running Clippy as a rustc wrapper #6782

Others

Running cargo clippy after cargo check now works as expected (cargo clippy and cargo check no longer shares the same build cache) #6687
Cargo now re-runs Clippy if arguments after -- provided to cargo clippy are changed. #6834
Extracted Clippy's utils module into the new clippy_utils crate #6756
Clippy lintcheck tool improvements #6800 #6735 #6764 #6708 #6780 #6686

Rust 1.51

Released 2021-03-25

4911ab1...3e41797

New Lints

upper_case_acronyms #6475
from_over_into #6476
case_sensitive_file_extension_comparisons #6500
needless_question_mark #6507
missing_panics_doc #6523
redundant_slicing #6528
vec_init_then_push #6538
ptr_as_ptr #6542
collapsible_else_if (split out from collapsible_if) #6544
inspect_for_each #6577
manual_filter_map #6591
exhaustive_enums #6617
exhaustive_structs #6617

Moves and Deprecations

Replace find_map with manual_find_map #6591
unknown_clippy_lints Now integrated in the unknown_lints rustc lint #6653

Enhancements

ptr_arg Now also suggests to use &Path instead of &PathBuf #6506
cast_ptr_alignment Also lint when the pointer::cast method is used #6557
collapsible_match Now also deals with & and * operators in the match scrutinee #6619

False Positive Fixes

similar_names Ignore underscore prefixed names #6403
print_literal and write_literal No longer lint numeric literals #6408
large_enum_variant No longer lints in external macros #6485
empty_enum Only lint if never_type feature is enabled #6513
field_reassign_with_default No longer lints in macros #6553
size_of_in_element_count No longer lints when dividing by element size #6578
needless_return No longer lints in macros #6586
match_overlapping_arm No longer lint when first arm is completely included in second arm #6603
doc_markdown Add WebGL to the default configuration as an allowed identifier #6605

Suggestion Fixes/Improvements

field_reassign_with_default Don't expand macro in lint suggestion #6531
match_like_matches_macro Strip references in suggestion #6532
single_match Suggest if over if let when possible #6574
ref_in_deref Use parentheses correctly in suggestion #6609
stable_sort_primitive Clarify error message #6611

ICE Fixes

zero_sized_map_values #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
Clean up README.md by removing outdated paragraph #6488
await_holding_refcell_ref and await_holding_lock #6585
as_conversions #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
The Clippy version number now corresponds to the Rust version number #6526
Fix oversight which caused Clippy to lint deps in some environments, where CLIPPY_TESTS=true was set somewhere #6575
Add cargo dev-lintcheck tool to the Clippy Dev Tool #6469

Rust 1.50

Released 2021-02-11

b20d4c1...4bd77a1

New Lints

Moves and Deprecations

Previously deprecated str_to_string and string_to_string have been un-deprecated as restriction lints #6333
Deprecate panic_params lint. This is now available in rustc as non_fmt_panics #6351
Move map_err_ignore to restriction #6416
Move await_holding_refcell_ref to pedantic #6354
Move await_holding_lock to pedantic #6354

Enhancements

Add the unreadable-literal-lint-fractions configuration to disable the unreadable_literal lint for fractions #6421
clone_on_copy: Now shows the type in the lint message #6443
redundant_pattern_matching: Now also lints on std::task::Poll #6339
redundant_pattern_matching: Additionally also lints on std::net::IpAddr #6377
search_is_some: Now suggests contains instead of find(foo).is_some() #6119
clone_double_ref: Now prints the reference type in the lint message #6442
modulo_one: Now also lints on -1. #6360
empty_loop: Now lints no_std crates, too #6205
or_fun_call: Now also lints when indexing HashMap or BTreeMap #6267
wrong_self_convention: Now also lints in trait definitions #6316
needless_borrow: Print the type in the lint message #6449

False Positive Fixes

manual_range_contains: No longer lints in const fn #6382
unnecessary_lazy_evaluations: No longer lints if closure argument is used #6370
match_single_binding: Now ignores cases with #[cfg()] macros #6435
match_like_matches_macro: No longer lints on arms with attributes #6290
map_clone: No longer lints with deref and clone #6269
map_clone: No longer lints in the case of &mut #6301
needless_update: Now ignores non_exhaustive structs #6464
needless_collect: No longer lints when a collect is needed multiple times #6313
unnecessary_cast No longer lints cfg-dependent types #6369
declare_interior_mutable_const and borrow_interior_mutable_const: Both now ignore enums with frozen variants #6110
field_reassign_with_default No longer lint for private fields #6537

Suggestion Fixes/Improvements

vec_box: Provide correct type scope suggestion #6271
manual_range_contains: Give correct suggestion when using floats #6320
unnecessary_lazy_evaluations: Don't always mark suggestion as MachineApplicable #6272
manual_async_fn: Improve suggestion formatting #6294
unnecessary_cast: Fix incorrectly formatted float literal suggestion #6362

ICE Fixes

Fix a crash in from_iter_instead_of_collect #6304
Fix a silent crash when parsing doc comments in needless_doctest_main #6458

Documentation Improvements

The lint website search has been improved (#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
Add known problems to comparison_chain documentation #6390
Fix example used in cargo_common_metadata #6293
Improve map_clone documentation #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 #6201
Add --no-deps option to avoid running on path dependencies in workspaces #6188

Rust 1.49

Released 2020-12-31

e636b88...b20d4c1

New Lints

Moves and Deprecations

Rename single_char_push_str to single_char_add_str #6037
Rename zero_width_space to invisible_characters #6105
Deprecate drop_bounds (uplifted) #6111
Move string_lit_as_bytes to nursery #6117
Move rc_buffer to restriction #6128

Enhancements

manual_memcpy: Also lint when there are loop counters (and produce a reliable suggestion) #5727
single_char_add_str: Also lint on String::insert_str #6037
invisible_characters: Also lint the characters \u{AD} and \u{2060} #6105
eq_op: Also lint on the assert_*! macro family #6167
items_after_statements: Also lint in local macro expansions #6176
unnecessary_cast: Also lint casts on integer and float literals #6187
manual_unwrap_or: Also lint Result::unwrap_or #6190
match_like_matches_macro: Also lint when match has more than two arms #6216
integer_arithmetic: Better handle / an % operators #6229

False Positive Fixes

needless_lifetimes: Bail out if the function has a where clause with the lifetime #5978
explicit_counter_loop: No longer lints, when loop counter is used after it is incremented #6076
or_fun_call: Revert changes addressing the handling of const fn #6077
needless_range_loop: No longer lints, when the iterable is used in the range #6102
inconsistent_digit_grouping: Fix bug when using floating point exponent #6104
mistyped_literal_suffixes: No longer lints on the fractional part of a float (e.g. 713.32_64) #6114
invalid_regex: No longer lint on unicode characters within bytes::Regex #6132
boxed_local: No longer lints on extern fn arguments #6133
needless_lifetimes: Fix regression, where lifetime is used in where clause #6198

Suggestion Fixes/Improvements

unnecessary_sort_by: Avoid dereferencing the suggested closure parameter #6078
needless_arbitrary_self_type: Correctly handle expanded code #6093
useless_format: Preserve raw strings in suggestion #6151
empty_loop: Suggest alternatives #6162
borrowed_box: Correctly add parentheses in suggestion #6200
unused_unit: Improve suggestion formatting #6247

Documentation Improvements

Some doc improvements:
- rc_buffer #6090
- empty_loop #6162
doc_markdown: Document problematic link text style #6107

Rust 1.48

Released 2020-11-19

09bd400...e636b88

New lints

Moves and Deprecations

Downgrade verbose_bit_mask to pedantic #6036

Enhancements

Extend precedence to handle chains of methods combined with unary negation #5928
useless_vec: add a configuration value for the maximum allowed size on the stack #5907
suspicious_arithmetic_impl: extend to implementations of BitAnd, BitOr, BitXor, Rem, Shl, and Shr #5884
invalid_atomic_ordering: detect misuse of compare_exchange, compare_exchange_weak, and fetch_update #6025
Avoid redundant_pattern_matching triggering in macros #6069
option_if_let_else: distinguish pure from impure else expressions #5937
needless_doctest_main: parse doctests instead of using textual search #5912
wildcard_imports: allow prelude to appear in any segment of an import #5929
Re-enable len_zero for ranges now that range_is_empty is stable #5961
option_as_ref_deref: catch fully-qualified calls to Deref::deref and DerefMut::deref_mut #5933

False Positive Fixes

useless_attribute: permit allowing wildcard_imports and enum_glob_use #5994
transmute_ptr_to_ptr: avoid suggesting dereferencing raw pointers in const contexts #5999
redundant_closure_call: take into account usages of the closure in nested functions and closures #5920
Fix false positive in borrow_interior_mutable_const when referencing a field behind a pointer #5949
doc_markdown: allow using "GraphQL" without backticks #5996
to_string_in_display: avoid linting when calling to_string() on anything that is not self #5971
indexing_slicing and out_of_bounds_indexing treat references to arrays as arrays #6034
should_implement_trait: ignore methods with lifetime parameters #5725
needless_return: avoid linting if a temporary borrows a local variable #5903
Restrict unnecessary_sort_by to non-reference, Copy types #6006
Avoid suggesting from_bits/to_bits in const contexts in transmute_int_to_float #5919
declare_interior_mutable_const and borrow_interior_mutable_const: improve detection of interior mutable types #6046

Suggestion Fixes/Improvements

let_and_return: add a cast to the suggestion when the return expression has adjustments #5946
useless_conversion: show the type in the error message #6035
unnecessary_mut_passed: discriminate between functions and methods in the error message #5892
float_cmp and float_cmp_const: change wording to make margin of error less ambiguous #6043
default_trait_access: do not use unnecessary type parameters in the suggestion #5993
collapsible_if: don't use expanded code in the suggestion #5992
Do not suggest empty format strings in print_with_newline and write_with_newline #6042
unit_arg: improve the readability of the suggestion #5931
stable_sort_primitive: print the type that is being sorted in the lint message #5935
Show line count and max lines in too_many_lines lint message #6009
Keep parentheses in the suggestion of useless_conversion where applicable #5900
option_map_unit_fn and result_map_unit_fn: print the unit type () explicitly #6024
redundant_allocation: suggest replacing Rc<Box<T>> with Rc<T> #5899
Make lint messages adhere to rustc dev guide conventions #5893

ICE Fixes

Fix ICE in repeat_once #5948

Documentation Improvements

mutable_key_type: explain potential for false positives when the interior mutable type is not accessed in the Hash implementation #6019
unnecessary_mut_passed: fix typo #5913
Add example of false positive to ptr_arg docs. #5885
box_vec, vec_box and borrowed_box: add link to the documentation of Box #6023

Rust 1.47

Released 2020-10-08

c2c07fa...09bd400

New lints

Moves and Deprecations

Deprecate regex_macro lint #5760
Move range_minus_one to pedantic #5752

Enhancements

Improve needless_collect by catching collect calls followed by iter or into_iter calls #5837
panic, todo, unimplemented and unreachable now detect calls with formatting #5811
Detect more cases of suboptimal_flops and imprecise_flops #5443
Handle asymmetrical implementations of PartialEq in cmp_owned #5701
Make it possible to allow unsafe_derive_deserialize #5870
Catch ord.min(a).max(b) where a < b in min_max #5871
Make clone_on_copy suggestion machine applicable #5745
Enable len_zero on ranges now that is_empty is stable on them #5961

False Positive Fixes

Avoid triggering or_fun_call with const fns that take no arguments #5889
Fix redundant_closure_call false positive for closures that have multiple calls #5800
Don't lint cases involving ManuallyDrop in redundant_clone #5824
Treat a single expression the same as a single statement in the 2nd arm of a match in single_match_else #5771
Don't trigger unnested_or_patterns if the feature or_patterns is not enabled #5758
Avoid linting if key borrows in unnecessary_sort_by #5756
Consider Try impl for Poll when generating suggestions in try_err #5857
Take input lifetimes into account in manual_async_fn #5859
Fix multiple false positives in type_repetition_in_bounds and add a configuration option #5761
Limit the suspicious_arithmetic_impl lint to one binary operation #5820

Suggestion Fixes/Improvements

Improve readability of shadow_unrelated suggestion by truncating the RHS snippet #5788
Suggest filter_map instead of flat_map when mapping to Option in map_flatten #5846
Ensure suggestion is shown correctly for long method call chains in iter_nth_zero #5793
Drop borrow operator in suggestions of redundant_pattern_matching #5815
Add suggestion for iter_skip_next #5843
Improve collapsible_if fix suggestion #5732

ICE Fixes

Fix ICE caused by needless_collect #5877
Fix ICE caused by unnested_or_patterns #5784

Documentation Improvements

Fix grammar of await_holding_lock documentation #5748

Others

Make lints adhere to the rustc dev guide #5888

Rust 1.46

Released 2020-08-27

7ea7cd1...c2c07fa

New lints

Moves and Deprecations

Move cast_ptr_alignment to pedantic #5667

Enhancements

Improve mem_replace_with_uninit lint #5695

False Positive Fixes

len_zero: Avoid linting ranges when the range_is_empty feature is not enabled #5656
let_and_return: Don't lint if a temporary borrow is involved #5680
reversed_empty_ranges: Avoid linting N..N in for loop arguments in #5692
if_same_then_else: Don't assume multiplication is always commutative #5702
blacklisted_name: Remove bar from the default configuration #5712
redundant_pattern_matching: Avoid suggesting non-const fn calls in const contexts #5724

Suggestion Fixes/Improvements

Fix suggestion of unit_arg lint, so that it suggest semantic equivalent code #4455
Add auto applicable suggestion to macro_use_imports #5279

ICE Fixes

Fix ICE in the consts module of Clippy #5709

Documentation Improvements

Improve code examples across multiple lints #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
New issue templates now make it easier to complain if Clippy is too annoying or not annoying enough! #5735

Rust 1.45

Released 2020-07-16

891e1a8...7ea7cd1

New lints

Moves and Deprecations

Downgrade match_bool to pedantic #5408
Downgrade match_wild_err_arm to pedantic and update help messages. #5622
Downgrade useless_let_if_seq to nursery. #5599
Generalize option_and_then_some and rename to bind_instead_of_map. #5529
Rename identity_conversion to useless_conversion. #5568
Merge block_in_if_condition_expr and block_in_if_condition_stmt into blocks_in_if_conditions. #5563
Merge option_map_unwrap_or, option_map_unwrap_or_else and result_map_unwrap_or_else into map_unwrap_or. #5563
Merge option_unwrap_used and result_unwrap_used into unwrap_used. #5563
Merge option_expect_used and result_expect_used into expect_used. #5563
Merge for_loop_over_option and for_loop_over_result into for_loops_over_fallibles. #5563

Enhancements

Avoid running cargo lints when not enabled to improve performance. #5505
Extend useless_conversion with TryFrom and TryInto. #5631
Lint also in type parameters and where clauses in unused_unit. #5592
Do not suggest deriving Default in new_without_default. #5616

False Positive Fixes

while_let_on_iterator #5525
empty_line_after_outer_attr #5609
unnecessary_unwrap #5558
comparison_chain #5596
Don't trigger used_underscore_binding in await desugaring. #5535
Don't trigger borrowed_box on mutable references. #5491
Allow 1 << 0 in identity_op. #5602
Allow use super::*; glob imports in wildcard_imports. #5564
Whitelist more words in doc_markdown. #5611
Skip dev and build deps in multiple_crate_versions. #5636
Honor allow attribute on arguments in ptr_arg. #5647
Honor lint level attributes for redundant_field_names, just_underscores_and_digits, many_single_char_names and similar_names. #5651
Ignore calls to len in or_fun_call. #4429

Suggestion Improvements

Simplify suggestions in manual_memcpy. #5536
Fix suggestion in redundant_pattern_matching for macros. #5511
Avoid suggesting copied() for mutable references in map_clone. #5530
Improve help message for clone_double_ref. #5547

ICE Fixes

Fix ICE caused in unwrap module. #5590
Fix ICE on rustc test issue-69020-assoc-const-arith-overflow.rs #5499

Documentation

Clarify the documentation of unnecessary_mut_passed. #5639
Extend example for unneeded_field_pattern. #5541

Rust 1.44

Released 2020-06-04

204bb9b...891e1a8

New lints

Moves and Deprecations

Deprecate replace_consts lint #5380
Move cognitive_complexity to nursery #5428
Move useless_transmute to nursery #5364
Downgrade inefficient_to_string to pedantic #5412
Downgrade option_option to pedantic #5401
Downgrade unreadable_literal to pedantic #5419
Downgrade let_unit_value to pedantic #5409
Downgrade trivially_copy_pass_by_ref to pedantic #5410
Downgrade implicit_hasher to pedantic #5411

Enhancements

On nightly you can now use cargo clippy --fix -Z unstable-options to auto-fix lints that support this #5363
Make redundant_clone also trigger on cases where the cloned value is not consumed. #5304
Expand integer_arithmetic to also disallow bit-shifting #5430
option_as_ref_deref now detects more deref cases #5425
large_enum_variant now report the sizes of the largest and second-largest variants #5466
bool_comparison now also checks for inequality comparisons that can be written more concisely #5365
Expand clone_on_copy to work in method call arguments as well #5441
redundant_pattern_matching now also handles while let #5483
integer_arithmetic now also lints references of integers #5329
Expand float_cmp_const to also work on arrays #5345
Trigger map_flatten when map is called on an Option #5473

False Positive Fixes

Suggestion Improvements

Improved question_mark lint suggestion so that it doesn't add redundant as_ref() #5481
Improve the suggested placeholder in option_map_unit_fn #5292
Improve suggestion for match_single_binding when triggered inside a closure #5350

ICE Fixes

Handle the unstable trivial_bounds feature #5296
shadow_* lints #5297

Documentation

Fix documentation generation for configurable lints #5353
Update documentation for new_ret_no_self #5448
The documentation for option_option now suggest using a tri-state enum #5403
Fix bit mask example in verbose_bit_mask documentation #5454
wildcard_imports documentation now mentions that use ...::prelude::* is not linted #5312

Rust 1.43

Released 2020-04-23

4ee1206...204bb9b

New lints

Moves and Deprecations

Move unneeded_field_pattern to pedantic group #5200

Enhancements

Make missing_errors_doc lint also trigger on async functions #5181
Add more constants to approx_constant #5193
Extend question_mark lint #5266

False Positive Fixes

Suggestion Improvements

Improve suggestion when blocks of code are suggested #5134

ICE Fixes

misc_early lints #5129
missing_errors_doc #5213
Fix ICE when evaluating usizes #5256

Documentation

Improve documentation of iter_nth_zero
Add documentation pages for stable releases #5171

Others

Clippy now completely runs on GitHub Actions #5190

Rust 1.42

Released 2020-03-12

69f99e7...4ee1206

New lints

Moves and Deprecations

Move transmute_float_to_int from nursery to complexity group #5015
Move range_plus_one to pedantic group #5057
Move debug_assert_with_mut_call to nursery group #5106
Deprecate unused_label #4930

Enhancements

Lint vectored IO in unused_io_amount #5027
Make vec_box configurable by adding a size threshold #5081
Also lint constants in cmp_nan #4910
Fix false negative in expect_fun_call #4915
Fix false negative in redundant_clone #5017

False Positive Fixes

map_clone #4937
replace_consts #4977
let_and_return #5008
eq_op #5079
possible_missing_comma #5083
debug_assert_with_mut_call #5106
Don't trigger let_underscore_must_use in external macros #5082
Don't trigger empty_loop in no_std crates #5086

Suggestion Improvements

ICE fixes

unsound_collection_transmute #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

New Lints:
- exit #4697
- to_digit_is_some #4801
- tabs_in_doc_comments #4806
- large_stack_arrays #4807
- same_functions_in_if_condition #4814
- zst_offset #4816
- as_conversions #4821
- missing_errors_doc #4884
- transmute_float_to_int #4889
Remove plugin interface, see Inside Rust Blog for details #4714
Move use_self to nursery group #4863
Deprecate into_iter_on_array #4788
Expand string_lit_as_bytes to also trigger when literal has escapes #4808
Fix false positive in comparison_chain #4842
Fix false positive in while_immutable_condition #4730
Fix false positive in explicit_counter_loop #4803
Fix false positive in must_use_candidate #4794
Fix false positive in print_with_newline and write_with_newline #4769
Fix false positive in derive_hash_xor_eq #4766
Fix false positive in missing_inline_in_public_items #4870
Fix false positive in string_add #4880
Fix false positive in float_arithmetic #4851
Fix false positive in cast_sign_loss #4883
Fix false positive in manual_swap #4877
Fix ICEs occurring while checking some block expressions #4772
Fix ICE in use_self #4776
Fix ICEs related to const_generics #4780
Display help when running clippy-driver without arguments, instead of ICEing #4810
Clippy has its own ICE message now #4588
Show deprecated lints in the documentation again #4757
Improve Documentation by adding positive examples to some lints #4832

Rust 1.40

Released 2019-12-19

4e7e71b...c8e3cfb

New Lints:
- unneeded_wildcard_pattern #4537
- needless_doctest_main #4603
- suspicious_unary_op_formatting #4615
- debug_assert_with_mut_call #4680
- unused_self #4619
- inefficient_to_string #4683
- must_use_unit #4560
- must_use_candidate #4560
- double_must_use #4560
- comparison_chain #4569
- unsound_collection_transmute #4592
- panic #4657
- unreachable #4657
- todo #4657
- option_expect_used #4657
- result_expect_used #4657
Move redundant_clone to perf group #4509
Move manual_mul_add to nursery group #4736
Expand unit_cmp to also work with assert_eq!, debug_assert_eq!, assert_ne! and debug_assert_ne! #4613
Expand integer_arithmetic to also detect mutating arithmetic like += #4585
Fix false positive in nonminimal_bool #4568
Fix false positive in missing_safety_doc #4611
Fix false positive in cast_sign_loss #4614
Fix false positive in redundant_clone #4509
Fix false positive in try_err #4721
Fix false positive in toplevel_ref_arg #4570
Fix false positive in multiple_inherent_impl #4593
Improve more suggestions and tests in preparation for the unstable cargo fix --clippy #4575
Improve suggestion for zero_ptr #4599
Improve suggestion for explicit_counter_loop #4691
Improve suggestion for mul_add #4602
Improve suggestion for assertions_on_constants #4635
Fix ICE in use_self #4671
Fix ICE when encountering const casts #4590

Rust 1.39

Released 2019-11-07

3aea860...4e7e71b

New Lints:
- uninit_assumed_init #4479
- flat_map_identity #4231
- missing_safety_doc #4535
- mem_replace_with_uninit #4511
- suspicious_map #4394
- option_and_then_some #4386
- manual_saturating_arithmetic #4498
Deprecate unused_collect lint. This is fully covered by rustc's #[must_use] on collect #4348
Move type_repetition_in_bounds to pedantic group #4403
Move cast_lossless to pedantic group #4539
temporary_cstring_as_ptr now catches more cases #4425
use_self now works in constructors, too #4525
cargo_common_metadata now checks for license files #4518
cognitive_complexity now includes the measured complexity in the warning message #4469
Fix false positives in block_in_if_* lints #4458
Fix false positive in cast_lossless #4473
Fix false positive in clone_on_copy #4411
Fix false positive in deref_addrof #4487
Fix false positive in too_many_lines #4490
Fix false positive in new_ret_no_self #4365
Fix false positive in manual_swap #4478
Fix false positive in missing_const_for_fn #4450
Fix false positive in extra_unused_lifetimes #4477
Fix false positive in inherent_to_string #4460
Fix false positive in map_entry #4495
Fix false positive in unused_unit #4445
Fix false positive in redundant_pattern #4489
Fix false positive in wrong_self_convention #4369
Improve various suggestions and tests in preparation for the unstable cargo fix --clippy #4558
Improve suggestions for redundant_pattern_matching #4352
Improve suggestions for explicit_write #4544
Improve suggestion for or_fun_call #4522
Improve suggestion for match_as_ref #4446
Improve suggestion for unnecessary_fold_span #4382
Add suggestions for unseparated_literal_suffix #4401
Add suggestions for char_lit_as_u8 #4418

Rust 1.38

Released 2019-09-26

e3cb40e...3aea860

New Lints:
Move {unnnecessary,panicking}_unwrap out of nursery #4307
Extend the use_self lint to suggest uses of Self::Variant #4308
Improve suggestion for needless return #4262
Add auto-fixable suggestion for let_unit #4337
Fix false positive in pub_enum_variant_names and enum_variant_names #4345
Fix false positive in cast_ptr_alignment #4257
Fix false positive in string_lit_as_bytes #4233
Fix false positive in needless_lifetimes #4266
Fix false positive in float_cmp #4275
Fix false positives in needless_return #4274
Fix false negative in match_same_arms #4246
Fix incorrect suggestion for needless_bool #4335
Improve suggestion for cast_ptr_alignment #4257
Improve suggestion for single_char_literal #4361
Improve suggestion for len_zero #4314
Fix ICE in implicit_hasher #4268
Fix allow bug in trivially_copy_pass_by_ref #4250

Rust 1.37

Released 2019-08-15

082cfa7...e3cb40e

New Lints:
Renamed Lint: const_static_lifetime is now called redundant_static_lifetimes. The lint now covers statics in addition to consts #4162
match_same_arms now warns for all identical arms, instead of only the first one #4102
needless_return now works with void functions #4220
Fix false positive in redundant_closure #4190
Fix false positive in useless_attribute #4107
Fix incorrect suggestion for float_cmp #4214
Add suggestions for print_with_newline and write_with_newline #4136
Improve suggestions for option_map_unwrap_or_else and result_map_unwrap_or_else #4164
Improve suggestions for non_ascii_literal #4119
Improve diagnostics for let_and_return #4137
Improve diagnostics for trivially_copy_pass_by_ref #4071
Add macro check for unreadable_literal #4099

Rust 1.36

Released 2019-07-04

eb9f9b1...082cfa7

New lints: find_map, filter_map_next #4039
New lint: path_buf_push_overwrite #3954
Move path_buf_push_overwrite to the nursery #4013
Split redundant_closure into redundant_closure and redundant_closure_for_method_calls #4110
Allow allowing of toplevel_ref_arg lint #4007
Fix false negative in or_fun_call pertaining to nested constructors #4084
Fix false positive in or_fun_call pertaining to enum variant constructors #4018
Fix false positive in useless_let_if_seq pertaining to interior mutability #4035
Fix false positive in redundant_closure pertaining to non-function types #4008
Fix false positive in let_and_return pertaining to attributes on lets #4024
Fix false positive in module_name_repetitions lint pertaining to attributes #4006
Fix false positive on assertions_on_constants pertaining to debug_assert! #3989
Improve suggestion in map_clone to suggest .copied() where applicable #3970 #4043
Improve suggestion for search_is_some #4049
Improve suggestion applicability for naive_bytecount #3984
Improve suggestion applicability for while_let_loop #3975
Improve diagnostics for too_many_arguments #4053
Improve diagnostics for cast_lossless #4021
Deal with macro checks in desugarings better #4082
Add macro check for unnecessary_cast #4026
Remove approx_constant's documentation's "Known problems" section. #4027
Fix ICE in suspicious_else_formatting #3960
Fix ICE in decimal_literal_representation #3931

Rust 1.35

Released 2019-05-20

1fac380..37f5c1e

New lint: drop_bounds to detect T: Drop bounds
Split redundant_closure into redundant_closure and redundant_closure_for_method_calls #4110
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, #3772, #3741

Rust 1.34

Released 2019-04-10

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 for more details.
We now have improved documentation on how to add new lints

Rust 1.33

Released 2019-02-26

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

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

Clippy has been relicensed under a dual MIT / Apache license. See #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

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 \ns 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

🎉 🎉 Rust 1.29 is the first stable Rust that includes a bundled Clippy 🎉 🎉 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 😄)
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

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Changelog

Unreleased / In Rust Nightly

Rust 1.55

Important Changes

New Lints

Moves and Deprecations

Enhancements

False Positive Fixes

Suggestion Fixes/Improvements

ICE Fixes

Documentation Improvements

Rust 1.54

New Lints

Moves and Deprecations

Enhancements

False Positive Fixes

Suggestion Fixes/Improvements

ICE Fixes

Rust 1.53

New Lints

Moves and Deprecations

Enhancements

False Positive Fixes

Suggestion Fixes/Improvements

ICE Fixes

Others

Rust 1.52

New Lints

Moves and Deprecations

Enhancements

False Positive Fixes

Suggestion Fixes/Improvements

ICE Fixes

Documentation Improvements

Others

Rust 1.51

New Lints

Moves and Deprecations

Enhancements

False Positive Fixes

Suggestion Fixes/Improvements

ICE Fixes

Documentation Improvements

Others

Rust 1.50

New Lints

Moves and Deprecations

Enhancements

False Positive Fixes

Suggestion Fixes/Improvements

ICE Fixes

Documentation Improvements

Others

Rust 1.49

New Lints

Moves and Deprecations

Enhancements

False Positive Fixes

Suggestion Fixes/Improvements

Documentation Improvements

Rust 1.48

New lints

Moves and Deprecations

Enhancements

False Positive Fixes

Suggestion Fixes/Improvements

ICE Fixes

Documentation Improvements

Rust 1.47

New lints

Moves and Deprecations

Enhancements

False Positive Fixes

Suggestion Fixes/Improvements