All notable changes to this project will be documented in this file. See Changelog Update if you want to update this document.
Current stable, released 2022-06-30
large_include_file
#8727cast_abs_to_unsigned
#8635err_expect
#8606unnecessary_owned_empty_strings
#8660empty_structs_with_brackets
#8594crate_in_macro_def
#8576needless_option_take
#8665bytes_count_to_len
#8711is_digit_ascii_radix
#8624await_holding_invalid_type
#8707trim_split_whitespace
#8575pub_use
#8670format_push_string
#8626empty_drop
#8571drop_non_drop
#8630forget_non_drop
#8630
- Move
only_used_in_recursion
tonursery
(now allow-by-default) #8783 - Move
stable_sort_primitive
topedantic
(now allow-by-default) #8716
- Remove overlap between
manual_split_once
andneedless_splitn
#8631 map_identity
: Now checks for needlessmap_err
#8487extra_unused_lifetimes
: Now checks for impl lifetimes #8737cast_possible_truncation
: Now catches more cases with larger shift or divide operations #8687identity_op
: Now checks for modulo expressions #8519panic
: No longer lint in constant context #8592manual_split_once
: Now lints manual iteration ofsplitn
#8717self_named_module_files
,mod_module_files
: Now handle relative module paths #8611unsound_collection_transmute
: Now has better size and alignment checks #8648unnested_or_patterns
: Ignore cases, where the suggestion would be longer #8619
rest_pat_in_fully_bound_structs
: Now ignores structs marked with#[non_exhaustive]
#8690needless_late_init
: No longer lintsif let
statements,let mut
bindings or instances that changes the drop order significantly #8617unnecessary_cast
: No longer lints to casts to aliased or non-primitive types #8596init_numbered_fields
: No longer lints type aliases #8780needless_option_as_deref
: No longer lints foras_deref_mut
onOption
values that can't be moved #8646mistyped_literal_suffixes
: Now ignores float literals without an exponent #8742undocumented_unsafe_blocks
: Now ignores unsafe blocks from proc-macros and works better for sub-expressions #8450same_functions_in_if_condition
: Now allows different constants, even if they have the same value #8673needless_match
: Now checks for more complex types and ignores type coercion #8549assertions_on_constants
: Now ignores constants fromcfg!
macros #8614indexing_slicing
: Fix false positives with constant indices in #8588iter_with_drain
: Now ignores iterator references #8668useless_attribute
: Now allowsredundant_pub_crate
onuse
items #8743cast_ptr_alignment
: Now ignores expressions, when used for unaligned reads and writes #8632wrong_self_convention
: Now allows&mut self
and no self as arguments foris_*
methods #8738mut_from_ref
: Only lint in unsafe code #8647redundant_pub_crate
: Now allows macro exports #8736needless_match
: Ignores cases where the else block expression is different #8700transmute_int_to_char
: Now allows transmutations inconst
code #8610manual_non_exhaustive
: Ignores cases, where the enum value is used #8645redundant_closure
: Now ignores coerced closure #8431identity_op
: Is now ignored in cases where extra brackets would be needed #8730let_unit_value
: Now ignores cases which are used for type inference #8563
manual_split_once
: Fixed incorrect suggestions for single result accesses #8631bytes_nth
: Fix typos in the diagnostic message #8403mistyped_literal_suffixes
: Now suggests the correct integer types #8742unnecessary_to_owned
: Fixed suggestion based on the configured msrv #8692single_element_loop
: Improve lint for Edition 2021 arrays #8616manual_bits
: Now includes a cast for proper type conversion, when needed #8677option_map_unit_fn
,result_map_unit_fn
: Fix some incorrect suggestions #8584collapsible_else_if
: Add whitespace in suggestion #8729transmute_bytes_to_str
: Now suggestfrom_utf8_unchecked
inconst
context #8612map_clone
: Improve message and suggestion based on the msrv #8688needless_late_init
: Now shows thelet
statement where it was first initialized #8779
only_used_in_recursion
#8691cast_slice_different_sizes
#8720iter_overeager_cloned
#8602undocumented_unsafe_blocks
#8686
Released 2022-05-19
only_used_in_recursion
#8422cast_enum_truncation
#8381missing_spin_loop
#8174deref_by_slicing
#8218needless_match
#8471allow_attributes_without_reason
(Requires#![feature(lint_reasons)]
) #8504print_in_format_impl
#8253unnecessary_find_map
#8489or_then_unwrap
#8561unnecessary_join
#8579iter_with_drain
#8483cast_enum_constructor
#8562cast_slice_different_sizes
#8445
- Moved
transmute_undefined_repr
tonursery
(now allow-by-default) #8432 - Moved
try_err
torestriction
#8544 - Move
iter_with_drain
tonursery
#8541 - Renamed
to_string_in_display
torecursive_format_impl
#8188
dbg_macro
: The lint level can now be set with crate attributes and works inside macros #8411ptr_as_ptr
: Now works inside macros #8442use_self
: Now works for variants in match expressions #8456await_holding_lock
: Now lints forparking_lot::{Mutex, RwLock}
#8419recursive_format_impl
: Now checks for format calls onself
#8188
new_without_default
: No longer lints fornew()
methods with#[doc(hidden)]
#8472transmute_undefined_repr
: No longer lints for single field structs with#[repr(C)]
, generic parameters, wide pointers, unions, tuples and allow several forms of type erasure #8425 #8553 #8440 #8547match_single_binding
,match_same_arms
,match_as_ref
,match_bool
: No longer lintmatch
expressions withcfg
ed arms #8443single_component_path_imports
: No longer lint on macros #8537ptr_arg
: Allow&mut
arguments forCow<_>
#8552needless_borrow
: No longer lints for method calls #8441match_same_arms
: Now ensures that interposing arm patterns don't overlap #8232default_trait_access
: Now allowsDefault::default
in update expressions #8433
redundant_slicing
: Fixed suggestion for a method calls #8218map_flatten
: Long suggestions will now be split up into two help messages #8520unnecessary_lazy_evaluations
: Now shows suggestions for longer code snippets #8543unnecessary_sort_by
: Now suggestsReverse
including the path #8462search_is_some
: More suggestions are nowMachineApplicable
#8536
new_without_default
: Documentpub
requirement for the struct and fields #8429
Released 2022-04-07
single_char_lifetime_names
#8236iter_overeager_cloned
#8203transmute_undefined_repr
#8398default_union_representation
#8289manual_bits
#8213borrow_as_ptr
#8210
- Moved
disallowed_methods
anddisallowed_types
tostyle
(now warn-by-default) #8261 - Rename
ref_in_deref
toneedless_borrow
#8217 - Moved
mutex_atomic
tonursery
(now allow-by-default) #8260
ptr_arg
: Now takes the argument usage into account and lints for mutable references #8271unused_io_amount
: Now supports async read and write traits #8179while_let_on_iterator
: Improved detection to catch more cases #8221trait_duplication_in_bounds
: Now covers trait functions withSelf
bounds #8252unwrap_used
: Now works for.get(i).unwrap()
and.get_mut(i).unwrap()
#8372map_clone
: The suggestion takesmsrv
into account #8280manual_bits
andborrow_as_ptr
: Now track theclippy::msrv
attribute #8280disallowed_methods
: Now works for methods on primitive types #8112not_unsafe_ptr_arg_deref
: Now works for type aliases #8273needless_question_mark
: Now works for async functions #8311iter_not_returning_iterator
: Now handles type projections #8228wrong_self_convention
: Now detects wrongself
references in more cases #8208single_match
: Now works formatch
statements with tuples #8322
erasing_op
: No longer triggers if the output type changes #8204if_same_then_else
: No longer triggers forif let
statements #8297manual_memcpy
: No longer lints onVecDeque
#8226trait_duplication_in_bounds
: Now takes path segments into account #8315deref_addrof
: No longer lints when the dereference or borrow occurs in different a context #8268type_repetition_in_bounds
: Now checks for full equality to prevent false positives #8224ptr_arg
: No longer lint for mutable references in traits #8369implicit_clone
: No longer lints for double references #8231needless_lifetimes
: No longer lints lifetimes for explicitself
types #8278op_ref
: No longer lints inBinOp
impl if that can cause recursion #8298enum_variant_names
: No longer triggers for empty variant names #8329redundant_closure
: No longer lints forArc<T>
orRc<T>
#8193iter_not_returning_iterator
: No longer lints on trait implementations but therefore on trait definitions #8228single_match
: No longer lints on exhaustive enum patterns without a wildcard #8322manual_swap
: No longer lints on cases that involve automatic dereferences #8220useless_format
: Now works for implicit named arguments #8295
needless_borrow
: Prevent mutable borrows being moved and suggest removing the borrow on method calls #8217chars_next_cmp
: Correctly escapes the suggestion #8376explicit_write
: Add suggestions forwrite!
s with format arguments #8365manual_memcpy
: Suggestscopy_from_slice
when applicable #8226or_fun_call
: Improved suggestion display for long arguments #8292unnecessary_cast
: Now correctly includes the sign #8350cmp_owned
: No longer flips the comparison order #8299explicit_counter_loop
: Now correctly suggestsiter()
on references #8382
map_flatten
: Add documentation for theOption
type #8354- Document that Clippy's driver might use a different code generation than rustc #8037
- Clippy's lint list will now automatically focus the search box #8343
- Clippy now warns if we find multiple Clippy config files exist #8326
Released 2022-02-24
index_refutable_slice
#7643needless_splitn
#7896unnecessary_to_owned
#7978needless_late_init
#7995octal_escapes
#8007return_self_not_must_use
#8071init_numbered_fields
#8170
- Move
if_then_panic
topedantic
and rename tomanual_assert
(now allow-by-default) #7810 - Rename
disallow_type
todisallowed_types
anddisallowed_method
todisallowed_methods
#7984 - Move
map_flatten
tocomplexity
(now warn-by-default) #8054
match_overlapping_arm
: Fix false negative where after included ranges, overlapping ranges weren't linted anymore #7909deprecated_cfg_attr
: Now takes the specified MSRV into account #7944cast_lossless
: Now also lints forbool
to integer casts #7948let_underscore_lock
: Also emit lints for theparking_lot
crate #7957needless_borrow
#7977- Lint when a borrow is auto-dereffed more than once
- Lint in the trailing expression of a block for a match arm
strlen_on_c_strings
8001- Lint when used without a fully-qualified path
- Suggest removing the surrounding unsafe block when possible
non_ascii_literal
: Now also lints onchar
s, not juststring
s #8034single_char_pattern
: Now also lints onsplit_inclusive
,split_once
,rsplit_once
,replace
, andreplacen
#8077unwrap_or_else_default
: Now also lints onstd
constructors likeVec::new
,HashSet::new
, andHashMap::new
#8163shadow_reuse
: Now also lints on shadowedif let
bindings, instead ofshadow_unrelated
#8165
or_fun_call
,unnecessary_lazy_evaluations
: Improve heuristics, so that cheap functions (e.g. calling.len()
on aVec
) won't get linted anymore #7639manual_split_once
: No longer suggests code changing the original behavior #7896- Don't show
no_effect
orunnecessary_operation
warning for unit struct implementingFnOnce
#7898 semicolon_if_nothing_returned
: Fixed a bug, where the lint wrongly triggered onlet-else
statements #7955if_then_some_else_none
: No longer lints if there is an early return #7980needless_collect
: No longer suggests removal ofcollect
when removal would create code requiring mutably borrowing a value multiple times #7982shadow_same
: Fix false positive forasync
function's params #7997suboptimal_flops
: No longer triggers in constant functions #8009type_complexity
: No longer lints on associated types in traits #8030question_mark
: No longer lints if returned object is not local #8080option_if_let_else
: No longer lint on complex sub-patterns #8086blocks_in_if_conditions
: No longer lints on empty closures #8100enum_variant_names
: No longer lint when first prefix is only a substring of a camel-case word #8127identity_op
: Only lint on integral operands #8183
search_is_some
: Fix suggestion forany()
not taking item by reference #7463almost_swapped
: Now detects if there is ano_std
orno_core
attribute and adapts the suggestion accordingly #7877redundant_pattern_matching
: Fix suggestion for deref expressions #7949explicit_counter_loop
: Now also produces a suggestion for non-usize
types #7950manual_map
: Fix suggestion when used with unsafe functions and blocks #7968option_map_or_none
: Suggestmap
overand_then
when possible #7971option_if_let_else
: No longer expands macros in the suggestion #7974iter_cloned_collect
: Suggestcopied
overcloned
when possible #8006doc_markdown
: No longer uses inline hints to improve readability of suggestion #8011needless_question_mark
: Now better explains the suggestion #8028single_char_pattern
: Escape backslash\
in suggestion #8067needless_bool
: Suggesta != b
over!(a == b)
#8117iter_skip_next
: Suggest to add amut
if it is necessary in order to apply this lints suggestion #8133neg_multiply
: Now produces a suggestion #8144needless_return
: Now suggests the unit type()
over an empty block{}
in match arms #8185suboptimal_flops
: Now gives a syntactically correct suggestion forto_radians
andto_degrees
#8187
print_stdout
,print_stderr
,dbg_macro
: Document how the lint level can be changed crate-wide #8040- Added a note to the
README
that config changes don't apply to already compiled code #8175
- Clippy's lint list now displays the version a lint was added. 🎉 #7813
- New and improved issue templates #8032
- Dev: Add
cargo dev lint
command, to run your modified Clippy version on a file #7917
Released 2022-01-13
- Move
non_send_fields_in_send_ty
tonursery
(now allow-by-default) #8075 useless_format
: Handle implicit named arguments #8295
transmute_num_to_bytes
#7805match_str_case_mismatch
#7806format_in_format_args
,to_string_in_format_args
#7743uninit_vec
#7682fn_to_numeric_cast_any
#7705undocumented_unsafe_blocks
#7748trailing_empty_array
#7838string_slice
#7878
- Move
non_send_fields_in_send_ty
tosuspicious
#7874 - Move
non_ascii_literal
torestriction
#7907
question_mark
now coversResult
#7840- Make
useless_format
recognize bareformat!("")
#7801 - Lint on underscored variables with no side effects in
no_effect
#7775 - Expand
match_ref_pats
to check for multiple reference patterns #7800
- Fix false positive of
implicit_saturating_sub
withelse
clause #7832 - Fix
question_mark
when there is call in conditional predicate #7860 mut_mut
no longer lints when type is defined in external macros #7795- Avoid
eq_op
in test functions #7811 cast_possible_truncation
no longer lints when cast is coming fromsignum
method call #7850match_str_case_mismatch
no longer lints on uncased characters #7865ptr_arg
no longer lints references to type aliases #7890missing_safety_doc
now also accepts "implementation safety" headers #7856missing_safety_doc
no longer lints if any parent has#[doc(hidden)]
attribute #7849if_not_else
now ignores else-if statements #7895- Avoid linting
cast_possible_truncation
on bit-reducing operations #7819 - Avoid linting
field_reassign_with_default
whenDrop
andCopy
are involved #7794 unnecessary_sort_by
now checks if argument implementsOrd
trait #7824- Fix false positive in
match_overlapping_arm
#7847 - Prevent
needless_lifetimes
false positive inasync
function definition #7901
- Keep an initial
::
whendoc_markdown
suggests to use ticks #7916 - Add a machine applicable suggestion for the
doc_markdown
missing backticks lint #7904 equatable_if_let
no longer expands macros in the suggestion #7788- Make
shadow_reuse
suggestion less verbose #7782
- Fix ICE in
enum_variant_names
#7873 - Fix ICE in
undocumented_unsafe_blocks
#7891
- Fixed naive doc formatting for
#[must_use]
lints (must_use_unit
,double_must_use
,must_use_candidate
,let_underscore_must_use
) #7827 - Fix typo in example for
match_result_ok
#7815
- Allow giving reasons for
disallowed_types
#7791 - Fix
manual_assert
andmatch_wild_err_arm
for#![no_std]
and Rust 2021. #7851 - Fix regression in
semicolon_if_nothing_returned
on macros containing while loops #7789 - Added a new configuration
literal-suffix-style
to enforce a certain style writingunseparated_literal_suffix
#7726
Released 2021-12-02
negative_feature_names
#7539redundant_feature_names
#7539mod_module_files
#7543self_named_module_files
#7543manual_split_once
#7565derivable_impls
#7570needless_option_as_deref
#7596iter_not_returning_iterator
#7610same_name_method
#7653manual_assert
#7669non_send_fields_in_send_ty
#7709equatable_if_let
#7762
- Move
shadow_unrelated
torestriction
#7338 - Move
option_if_let_else
tonursery
#7568 - Move
branches_sharing_code
tonursery
#7595 - Rename
if_let_some_result
tomatch_result_ok
which now also handleswhile let
cases #7608 - Move
many_single_char_names
topedantic
#7671 - Move
float_cmp
topedantic
#7692 - Rename
box_vec
tobox_collection
and lint on more general cases #7693 - Uplift
invalid_atomic_ordering
to rustc rust-lang/rust#84039
- Rewrite the
shadow*
lints, so that they find a lot more shadows and are not limited to certain patterns #7338 - The
avoid-breaking-exported-api
configuration now also works forbox_collection
,redundant_allocation
,rc_buffer
,vec_box
,option_option
,linkedlist
,rc_mutex
#7560 unnecessary_unwrap
: Now also checks forexpect
s #7584disallowed_methods
: Allow adding a reason that will be displayed with the lint message #7621approx_constant
: Now checks the MSRV forLOG10_2
andLOG2_10
#7629approx_constant
: AddTAU
#7642needless_borrow
: Now also lints on needless mutable borrows #7657missing_safety_doc
: Now also lints on unsafe traits #7734
manual_map
: No longer lints when the option is borrowed in the match and also consumed in the arm #7531filter_next
: No longer lints iffilter
method is not theIterator::filter
method #7562manual_flatten
: No longer lints if expression is used afterif let
#7566option_if_let_else
: Multiple fixes #7573break
andcontinue
statements local to the would-be closure are allowed- Don't lint in const contexts
- Don't lint when yield expressions are used
- Don't lint when the captures made by the would-be closure conflict with the other branch
- Don't lint when a field of a local is used when the type could be potentially moved from
- In some cases, don't lint when scrutinee expression conflicts with the captures of the would-be closure
redundant_allocation
: No longer lints onBox<Box<dyn T>>
which replaces wide pointers with thin pointers #7592bool_assert_comparison
: No longer lints on types that do not implement theNot
trait withOutput = bool
#7605mut_range_bound
: No longer lints on range bound mutations, that are immediately followed by abreak;
#7607mutable_key_type
: Improve accuracy and document remaining false positives and false negatives #7640redundant_closure
: Rewrite the lint to fix various false positives and false negatives #7661large_enum_variant
: No longer wrongly identifies the second largest variant #7677needless_return
: No longer lints on let-else expressions #7685suspicious_else_formatting
: No longer lints in proc-macros #7707excessive_precision
: No longer lints when in some cases the float was already written in the shortest form #7722doc_markdown
: No longer lints on intra-doc links #7772
unnecessary_operation
: Recommend using anassert!
instead of using a function call in an indexing operation #7453manual_split_once
: Produce semantically equivalent suggestion whenrsplitn
is used #7663while_let_on_iterator
: Produce correct suggestion when using&mut
#7690manual_assert
: No better handles complex conditions #7741- Correctly handle signs in exponents in numeric literals lints #7747
suspicious_map
: Now also suggests to useinspect
as an alternative #7770- Drop exponent from suggestion if it is 0 in numeric literals lints #7774
Released 2021-10-21
needless_continue
: Now also lints inloop { continue; }
case #7477disallowed_types
: Now also primitive types can be disallowed #7488manual_swap
: Now also lints on xor swaps #7506map_flatten
: Now also lints on theResult
type #7522no_effect
: Now also lints on inclusive ranges #7556
nonstandard_macro_braces
: No longer lints on similar named nested macros #7478too_many_lines
: No longer lints in closures to avoid duplicated diagnostics #7534similar_names
: No longer complains aboutiter
anditem
being too similar #7546
similar_names
: No longer suggests to insert or add an underscore as a fix #7221new_without_default
: No longer shows the full qualified type path when suggesting adding aDefault
implementation #7493while_let_on_iterator
: Now suggests re-borrowing mutable references #7520extend_with_drain
: Improve code suggestion for mutable and immutable references #7533trivially_copy_pass_by_ref
: Now properly handlesSelf
type #7535never_loop
: Now suggests usingif let
instead of afor
loop when applicable #7541
- Clippy now uses a lint to generate its lint documentation. Lints all the way down. #7502
- Reworked Clippy's website:
#7172
#7279
- Added applicability information about lints
- Added a link to jump into the implementation
- Improved loading times
- Adapted some styling
cargo clippy --help
now also explains the--fix
and--no-deps
flag #7492unnested_or_patterns
: Removedor_patterns
feature gate in the code example #7507
Released 2021-09-09
- Stabilized
cargo clippy --fix
🎉 #7405
rc_mutex
#7316nonstandard_macro_braces
#7299strlen_on_c_strings
#7243self_named_constructors
#7403disallowed_script_idents
#7400disallowed_types
#7315missing_enforced_import_renames
#7300extend_with_drain
#7270
- Moved
from_iter_instead_of_collect
topedantic
#7375 - Added
suspicious
as a new lint group for code that is most likely wrong or useless #7350- Moved
blanket_clippy_restriction_lints
tosuspicious
- Moved
empty_loop
tosuspicious
- Moved
eval_order_dependence
tosuspicious
- Moved
float_equality_without_abs
tosuspicious
- Moved
for_loops_over_fallibles
tosuspicious
- Moved
misrefactored_assign_op
tosuspicious
- Moved
mut_range_bound
tosuspicious
- Moved
mutable_key_type
tosuspicious
- Moved
suspicious_arithmetic_impl
tosuspicious
- Moved
suspicious_assignment_formatting
tosuspicious
- Moved
suspicious_else_formatting
tosuspicious
- Moved
suspicious_map
tosuspicious
- Moved
suspicious_op_assign_impl
tosuspicious
- Moved
suspicious_unary_op_formatting
tosuspicious
- Moved
while_let_on_iterator
: Now suggests&mut iter
inside closures #7262doc_markdown
:wildcard_enum_match_arm
,match_wildcard_for_single_variants
: Now allows wildcards for enums with unstable or hidden variants #7407redundant_allocation
: Now additionally supports theArc<>
type #7308blacklisted_name
: Now allows blacklisted names in test code #7379redundant_closure
: Suggests&mut
forFnMut
#7437disallowed_methods
,disallowed_types
: The configuration valuesdisallowed-method
anddisallowed-type
no longer require fully qualified paths #7345zst_offset
: Fixed lint invocation after it was accidentally suppressed #7396
default_numeric_fallback
: No longer lints on float literals as function arguments #7446use_self
: No longer lints on type parameters #7288unimplemented
: Now ignores theassert
anddebug_assert
macros #7439branches_sharing_code
: Now always checks for block expressions #7462field_reassign_with_default
: No longer triggers in macros #7160redundant_clone
: No longer lints on required clones for borrowed data #7346default_numeric_fallback
: No longer triggers in external macros #7325needless_bool
: No longer lints in macros #7442useless_format
: No longer triggers when additional text is being appended #7442assertions_on_constants
:cfg!(...)
is no longer considered to be a constant #7319
needless_collect
: Now show correct lint messages for shadowed values #7289wrong_pub_self_convention
: The deprecated message now suggest the correct configuration value #7382semicolon_if_nothing_returned
: Allow missing semicolon in blocks with only one expression #7326
Released 2021-07-29
ref_binding_to_reference
#7105needless_bitwise_bool
#7133unused_async
#7225manual_str_repeat
#7265suspicious_splitn
#7292
- Deprecate
pub_enum_variant_names
andwrong_pub_self_convention
in favor of the newavoid-breaking-exported-api
config option (see Enhancements) #7187 - Move
inconsistent_struct_constructor
topedantic
#7193 - Move
needless_borrow
tostyle
(now warn-by-default) #7254 - Move
suspicious_operation_groupings
tonursery
#7266 - Move
semicolon_if_nothing_returned
topedantic
#7268
while_let_on_iterator
: Now also lints in nested loops #6966single_char_pattern
: Now also lints onstrip_prefix
andstrip_suffix
#7156needless_collect
: Now also lints on assignments with type annotations #7163if_then_some_else_none
: Now works with the MSRV config #7177- Add
avoid-breaking-exported-api
config option for the lintsenum_variant_names
,large_types_passed_by_value
,trivially_copy_pass_by_ref
,unnecessary_wraps
,upper_case_acronyms
, andwrong_self_convention
. We recommend to set this configuration option tofalse
before a major release (1.0/2.0/...) to clean up the API #7187 needless_collect
: Now lints on even more data structures #7188missing_docs_in_private_items
: No longer sees#[<name> = "<value>"]
like attributes as sufficient documentation #7281needless_collect
,short_circuit_statement
,unnecessary_operation
: Now work as expected when used withallow
#7282
implicit_return
: Now takes all diverging functions in account to avoid false positives #6951while_let_on_iterator
: No longer lints when the iterator is a struct field and the struct is used in the loop #6966multiple_inherent_impl
: No longer lints with generic arguments #7089comparison_chain
: No longer lints in aconst
context #7118while_immutable_condition
: Fix false positive where mutation in the loop variable wasn't picked up #7144default_trait_access
: No longer lints in macros #7150needless_question_mark
: No longer lints when the inner value is implicitly dereferenced #7165unused_unit
: No longer lints when multiple macro contexts are involved #7167eval_order_dependence
: Fix false positive in async context #7174unnecessary_filter_map
: No longer lints if thefilter_map
changes the type #7175wrong_self_convention
: No longer lints in trait implementations of non-Copy
types #7182suboptimal_flops
: No longer lints onpowi(2)
#7201wrong_self_convention
: No longer lints if there is no implicitself
#7215option_if_let_else
: No longer lints onelse if let
pattern #7216use_self
,useless_conversion
: Fix false positives when generic arguments are involved #7223manual_unwrap_or
: Fix false positive with deref coercion #7233similar_names
: No longer lints onwparam
/lparam
#7255redundant_closure
: No longer lints on using thevec![]
macro in a closure #7263
implicit_return
#6951- Fix suggestion for async functions
- Improve suggestion with macros
- Suggest to change
break
toreturn
when appropriate
while_let_on_iterator
: Now suggests&mut iter
when necessary #6966match_single_binding
: Improve suggestion when match scrutinee has side effects #7095needless_borrow
: Now suggests to also change usage sites as needed #7105write_with_newline
: Improve suggestion when only\n
is written to the buffer #7183from_iter_instead_of_collect
: The suggestion is now auto applicable also when a<_ as Trait>::_
is involved #7264not_unsafe_ptr_arg_deref
: Improved error message #7294
- Fix ICE when running Clippy on
libstd
#7140 implicit_return
#7242
Released 2021-06-17
option_filter_map
#6342branches_sharing_code
#6463needless_for_each
#6706if_then_some_else_none
#6859non_octal_unix_permissions
#7001unnecessary_self_imports
#7072bool_assert_comparison
#7083cloned_instead_of_copied
#7098flat_map_option
#7101
- Deprecate
filter_map
lint #7059 - Move
transmute_ptr_to_ptr
topedantic
#7102
mem_replace_with_default
: Also lint on common std constructors #6820wrong_self_convention
: Also lint onto_*_mut
methods #6828wildcard_enum_match_arm
,match_wildcard_for_single_variants
: #6863- Attempt to find a common path prefix in suggestion
- Don't lint on
Option
andResult
- Consider
Self
prefix
explicit_deref_methods
: Also lint on chainedderef
calls #6865or_fun_call
: Also lint onunsafe
blocks #6928vec_box
,linkedlist
,option_option
: Also lint inconst
andstatic
items #6938search_is_some
: Also check foris_none
#6942string_lit_as_bytes
: Also lint oninto_bytes
#6959len_without_is_empty
: Also lint if function signatures oflen
andis_empty
don't match #6980redundant_pattern_matching
: Also lint if the pattern is a&
pattern #6991clone_on_copy
: Also lint on chained method calls takingself
by value #7000missing_panics_doc
: Also lint onassert_eq!
andassert_ne!
#7029needless_return
: Also lint inasync
functions #7067unused_io_amount
: Also lint on expressions like_.read().ok()?
#7100iter_cloned_collect
: Also lint on large arrays, since const-generics are now stable #7138
upper_case_acronyms
: No longer lints on public items #6805suspicious_map
: No longer lints when side effects may occur inside themap
call #6831manual_map
,manual_unwrap_or
: No longer lints inconst
functions #6917wrong_self_convention
: Now respectsCopy
types #6924needless_question_mark
: No longer lints if the?
and theSome(..)
come from different macro contexts #6935map_entry
: Better detect if the entry API can be used #6937or_fun_call
: No longer lints on somelen
function calls #6950new_ret_no_self
: No longer lints whenSelf
is returned with different generic arguments #6952upper_case_acronyms
: No longer lints on public items #6981explicit_into_iter_loop
: Only lint wheninto_iter
is an implementation ofIntoIterator
#6982expl_impl_clone_on_copy
: Take generic constraints into account before suggesting to usederive
instead #6993missing_panics_doc
: No longer lints when only debug-assertions are used #6996clone_on_copy
: Only lint when using theClone
trait #7000wrong_self_convention
: No longer lints inside a trait implementation #7002redundant_clone
: No longer lints when the cloned value is modified while the clone is in use #7011same_item_push
: No longer lints if theVec
is used in the loop body #7018cargo_common_metadata
: Remove author requirement #7026panic_in_result_fn
: No longer lints ondebug_assert
family #7060panic
: No longer wrongfully lints ondebug_assert
with message #7063wrong_self_convention
: No longer lints in trait implementations where noself
is involved #7064missing_const_for_fn
: No longer lints when unstableconst
function is involved #7076suspicious_else_formatting
: Allow Allman style braces #7087inconsistent_struct_constructor
: No longer lints in macros #7097single_component_path_imports
: No longer lints on macro re-exports #7120
redundant_pattern_matching
: Add a note when applying this lint would change the drop order #6568write_literal
,print_literal
: Add auto-applicable suggestion #6821manual_map
: Fix suggestion for complexif let ... else
chains #6856inconsistent_struct_constructor
: Make lint description and message clearer #6892map_entry
: Now suggestsor_insert
,insert_with
ormatch _.entry(_)
as appropriate #6937manual_flatten
: Suggest to insertcopied
if necessary #6962redundant_slicing
: Fix suggestion when a re-borrow might be required or when the value is from a macro call #6975match_wildcard_for_single_variants
: Fix suggestion for hidden variant #6988clone_on_copy
: Correct suggestion when the cloned value is a macro call #7000manual_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 #7020useless_vec
: Now considers mutability #7036useless_format
: Wrap the content in braces if necessary #7092single_match
: Don't suggest an equality check for types which don't implementPartialEq
#7093from_over_into
: Mention type in help message #7099manual_unwrap_or
: Fix invalid code suggestion due to a macro call #7136
macro_use_imports
#7022missing_panics_doc
#7034tabs_in_doc_comments
#7039missing_const_for_fn
#7128
- Clippy's lint list now supports themes #7030
- Lints that were uplifted to
rustc
now mention the newrustc
name in the deprecation warning #7056
Released 2021-05-06
from_str_radix_10
#6717implicit_clone
#6730semicolon_if_nothing_returned
#6681manual_flatten
#6646inconsistent_struct_constructor
#6769iter_count
#6791default_numeric_fallback
#6662bytes_nth
#6695filter_map_identity
#6685manual_map
#6573
- Moved
upper_case_acronyms
topedantic
#6775 - Moved
manual_map
tonursery
#6796 - Moved
unnecessary_wraps
topedantic
#6765 - Moved
trivial_regex
tonursery
#6696 - Moved
naive_bytecount
topedantic
#6825 - Moved
upper_case_acronyms
tostyle
#6788 - Moved
manual_map
tostyle
#6801
disallowed_methods
: Now supports functions in addition to methods #6674upper_case_acronyms
: Added a new configurationupper-case-acronyms-aggressive
to trigger the lint if there is more than one uppercase character next to each other #6788collapsible_match
: Now supports block comparison with different value names #6754unnecessary_wraps
: Will now suggest removing unnecessary wrapped return unit type, likeOption<()>
#6665- Improved value usage detection in closures #6698
use_self
: No longer lints in macros #6833use_self
: Fixed multiple false positives for: generics, associated types and derive implementations #6179missing_inline_in_public_items
: No longer lints for procedural macros #6814inherent_to_string
: No longer lints on functions with function generics #6771doc_markdown
: AddOpenDNS
to the default configuration as an allowed identifier #6783missing_panics_doc
: No longer lints onunreachable!
#6700collapsible_if
: No longer lints on if statements with attributes #6701match_same_arms
: Only considers empty blocks as equal if the tokens contained are the same #6843redundant_closure
: Now ignores macros #6871manual_map
: Fixed false positives when control flow statements likereturn
,break
etc. are used #6801vec_init_then_push
: Fixed false positives for loops and if statements #6697len_without_is_empty
: Will now consider multiple impl blocks and#[allow]
on thelen
method as well as the type definition. #6853let_underscore_drop
: Only lints on types which implementDrop
#6682unit_arg
: No longer lints on unit arguments when they come from a path expression. #6601cargo_common_metadata
: No longer lints ifpublish = false
is defined in the manifest #6650
collapsible_match
: Fixed lint message capitalization #6766or_fun_call
: Improved suggestions foror_insert(vec![])
#6790manual_map
: No longer expands macros in the suggestions #6801- Aligned Clippy's lint messages with the rustc dev guide #6787
useless_format
: Improved the documentation example #6854- Clippy's
README.md
: Includes a new subsection on running Clippy as a rustc wrapper #6782
- Running
cargo clippy
aftercargo check
now works as expected (cargo clippy
andcargo check
no longer shares the same build cache) #6687 - Cargo now re-runs Clippy if arguments after
--
provided tocargo clippy
are changed. #6834 - Extracted Clippy's
utils
module into the newclippy_utils
crate #6756 - Clippy lintcheck tool improvements #6800 #6735 #6764 #6708 #6780 #6686
Released 2021-03-25
upper_case_acronyms
#6475from_over_into
#6476case_sensitive_file_extension_comparisons
#6500needless_question_mark
#6507missing_panics_doc
#6523redundant_slicing
#6528vec_init_then_push
#6538ptr_as_ptr
#6542collapsible_else_if
(split out fromcollapsible_if
) #6544inspect_for_each
#6577manual_filter_map
#6591exhaustive_enums
#6617exhaustive_structs
#6617
- Replace
find_map
withmanual_find_map
#6591 unknown_clippy_lints
Now integrated in theunknown_lints
rustc lint #6653
ptr_arg
Now also suggests to use&Path
instead of&PathBuf
#6506cast_ptr_alignment
Also lint when thepointer::cast
method is used #6557collapsible_match
Now also deals with&
and*
operators in thematch
scrutinee #6619
similar_names
Ignore underscore prefixed names #6403print_literal
andwrite_literal
No longer lint numeric literals #6408large_enum_variant
No longer lints in external macros #6485empty_enum
Only lint ifnever_type
feature is enabled #6513field_reassign_with_default
No longer lints in macros #6553size_of_in_element_count
No longer lints when dividing by element size #6578needless_return
No longer lints in macros #6586match_overlapping_arm
No longer lint when first arm is completely included in second arm #6603doc_markdown
AddWebGL
to the default configuration as an allowed identifier #6605
field_reassign_with_default
Don't expand macro in lint suggestion #6531match_like_matches_macro
Strip references in suggestion #6532single_match
Suggestif
overif let
when possible #6574ref_in_deref
Use parentheses correctly in suggestion #6609stable_sort_primitive
Clarify error message #6611
- 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
andawait_holding_lock
#6585as_conversions
#6608
- 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
Released 2021-02-11
suspicious_operation_groupings
#6086size_of_in_element_count
#6394unnecessary_wraps
#6070let_underscore_drop
#6305collapsible_match
#6402redundant_else
#6330zero_sized_map_values
#6218print_stderr
#6367string_from_utf8_as_bytes
#6134
- Previously deprecated
str_to_string
andstring_to_string
have been un-deprecated asrestriction
lints #6333 - Deprecate
panic_params
lint. This is now available in rustc asnon_fmt_panics
#6351 - Move
map_err_ignore
torestriction
#6416 - Move
await_holding_refcell_ref
topedantic
#6354 - Move
await_holding_lock
topedantic
#6354
- Add the
unreadable-literal-lint-fractions
configuration to disable theunreadable_literal
lint for fractions #6421 clone_on_copy
: Now shows the type in the lint message #6443redundant_pattern_matching
: Now also lints onstd::task::Poll
#6339redundant_pattern_matching
: Additionally also lints onstd::net::IpAddr
#6377search_is_some
: Now suggestscontains
instead offind(foo).is_some()
#6119clone_double_ref
: Now prints the reference type in the lint message #6442modulo_one
: Now also lints on -1. #6360empty_loop
: Now lints no_std crates, too #6205or_fun_call
: Now also lints when indexingHashMap
orBTreeMap
#6267wrong_self_convention
: Now also lints in trait definitions #6316needless_borrow
: Print the type in the lint message #6449
manual_range_contains
: No longer lints inconst fn
#6382unnecessary_lazy_evaluations
: No longer lints if closure argument is used #6370match_single_binding
: Now ignores cases with#[cfg()]
macros #6435match_like_matches_macro
: No longer lints on arms with attributes #6290map_clone
: No longer lints with deref and clone #6269map_clone
: No longer lints in the case of &mut #6301needless_update
: Now ignoresnon_exhaustive
structs #6464needless_collect
: No longer lints when a collect is needed multiple times #6313unnecessary_cast
No longer lints cfg-dependent types #6369declare_interior_mutable_const
andborrow_interior_mutable_const
: Both now ignore enums with frozen variants #6110field_reassign_with_default
No longer lint for private fields #6537
vec_box
: Provide correct type scope suggestion #6271manual_range_contains
: Give correct suggestion when using floats #6320unnecessary_lazy_evaluations
: Don't always mark suggestion as MachineApplicable #6272manual_async_fn
: Improve suggestion formatting #6294unnecessary_cast
: Fix incorrectly formatted float literal suggestion #6362
- Fix a crash in
from_iter_instead_of_collect
#6304 - Fix a silent crash when parsing doc comments in
needless_doctest_main
#6458
- The lint website search has been improved (#6477):
- Searching for lints with dashes and spaces is possible now. For example
missing-errors-doc
andmissing errors doc
are now valid aliases for lint names - Improved fuzzy search in lint descriptions
- Searching for lints with dashes and spaces is possible now. For example
- 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
- 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
Released 2020-12-31
field_reassign_with_default
#5911await_holding_refcell_ref
#6029disallowed_methods
#6081inline_asm_x86_att_syntax
#6092inline_asm_x86_intel_syntax
#6092from_iter_instead_of_collect
#6101mut_mutex_lock
#6103single_element_loop
#6109manual_unwrap_or
#6123large_types_passed_by_value
#6135result_unit_err
#6157ref_option_ref
#6165manual_range_contains
#6177unusual_byte_groupings
#6183comparison_to_empty
#6226map_collect_result_unit
#6227manual_ok_or
#6233
- Rename
single_char_push_str
tosingle_char_add_str
#6037 - Rename
zero_width_space
toinvisible_characters
#6105 - Deprecate
drop_bounds
(uplifted) #6111 - Move
string_lit_as_bytes
tonursery
#6117 - Move
rc_buffer
torestriction
#6128
manual_memcpy
: Also lint when there are loop counters (and produce a reliable suggestion) #5727single_char_add_str
: Also lint onString::insert_str
#6037invisible_characters
: Also lint the characters\u{AD}
and\u{2060}
#6105eq_op
: Also lint on theassert_*!
macro family #6167items_after_statements
: Also lint in local macro expansions #6176unnecessary_cast
: Also lint casts on integer and float literals #6187manual_unwrap_or
: Also lintResult::unwrap_or
#6190match_like_matches_macro
: Also lint whenmatch
has more than two arms #6216integer_arithmetic
: Better handle/
an%
operators #6229
needless_lifetimes
: Bail out if the function has awhere
clause with the lifetime #5978explicit_counter_loop
: No longer lints, when loop counter is used after it is incremented #6076or_fun_call
: Revert changes addressing the handling ofconst fn
#6077needless_range_loop
: No longer lints, when the iterable is used in the range #6102inconsistent_digit_grouping
: Fix bug when using floating point exponent #6104mistyped_literal_suffixes
: No longer lints on the fractional part of a float (e.g.713.32_64
) #6114invalid_regex
: No longer lint on unicode characters withinbytes::Regex
#6132boxed_local
: No longer lints onextern fn
arguments #6133needless_lifetimes
: Fix regression, where lifetime is used inwhere
clause #6198
unnecessary_sort_by
: Avoid dereferencing the suggested closure parameter #6078needless_arbitrary_self_type
: Correctly handle expanded code #6093useless_format
: Preserve raw strings in suggestion #6151empty_loop
: Suggest alternatives #6162borrowed_box
: Correctly add parentheses in suggestion #6200unused_unit
: Improve suggestion formatting #6247
- Some doc improvements:
doc_markdown
: Document problematic link text style #6107
Released 2020-11-19
self_assignment
#5894unnecessary_lazy_evaluations
#5720manual_strip
#6038map_err_ignore
#5998rc_buffer
#6044to_string_in_display
#5831single_char_push_str
#5881
- Downgrade
verbose_bit_mask
to pedantic #6036
- 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 #5907suspicious_arithmetic_impl
: extend to implementations ofBitAnd
,BitOr
,BitXor
,Rem
,Shl
, andShr
#5884invalid_atomic_ordering
: detect misuse ofcompare_exchange
,compare_exchange_weak
, andfetch_update
#6025- Avoid
redundant_pattern_matching
triggering in macros #6069 option_if_let_else
: distinguish pure from impureelse
expressions #5937needless_doctest_main
: parse doctests instead of using textual search #5912wildcard_imports
: allowprelude
to appear in any segment of an import #5929- Re-enable
len_zero
for ranges now thatrange_is_empty
is stable #5961 option_as_ref_deref
: catch fully-qualified calls toDeref::deref
andDerefMut::deref_mut
#5933
useless_attribute
: permit allowingwildcard_imports
andenum_glob_use
#5994transmute_ptr_to_ptr
: avoid suggesting dereferencing raw pointers in const contexts #5999redundant_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 #5996to_string_in_display
: avoid linting when callingto_string()
on anything that is notself
#5971indexing_slicing
andout_of_bounds_indexing
treat references to arrays as arrays #6034should_implement_trait
: ignore methods with lifetime parameters #5725needless_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 intransmute_int_to_float
#5919 declare_interior_mutable_const
andborrow_interior_mutable_const
: improve detection of interior mutable types #6046
let_and_return
: add a cast to the suggestion when the return expression has adjustments #5946useless_conversion
: show the type in the error message #6035unnecessary_mut_passed
: discriminate between functions and methods in the error message #5892float_cmp
andfloat_cmp_const
: change wording to make margin of error less ambiguous #6043default_trait_access
: do not use unnecessary type parameters in the suggestion #5993collapsible_if
: don't use expanded code in the suggestion #5992- Do not suggest empty format strings in
print_with_newline
andwrite_with_newline
#6042 unit_arg
: improve the readability of the suggestion #5931stable_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
andresult_map_unit_fn
: print the unit type()
explicitly #6024redundant_allocation
: suggest replacingRc<Box<T>>
withRc<T>
#5899- Make lint messages adhere to rustc dev guide conventions #5893
- Fix ICE in
repeat_once
#5948
mutable_key_type
: explain potential for false positives when the interior mutable type is not accessed in theHash
implementation #6019unnecessary_mut_passed
: fix typo #5913- Add example of false positive to
ptr_arg
docs. #5885 box_vec
,vec_box
andborrowed_box
: add link to the documentation ofBox
#6023
Released 2020-10-08
derive_ord_xor_partial_ord
#5848trait_duplication_in_bounds
#5852map_identity
#5694unit_return_expecting_ord
#5737pattern_type_mismatch
#4841repeat_once
#5773same_item_push
#5825needless_arbitrary_self_type
#5869match_like_matches_macro
#5769stable_sort_primitive
#5809blanket_clippy_restriction_lints
#5750option_if_let_else
#5301
- Deprecate
regex_macro
lint #5760 - Move
range_minus_one
topedantic
#5752
- Improve
needless_collect
by catchingcollect
calls followed byiter
orinto_iter
calls #5837 panic
,todo
,unimplemented
andunreachable
now detect calls with formatting #5811- Detect more cases of
suboptimal_flops
andimprecise_flops
#5443 - Handle asymmetrical implementations of
PartialEq
incmp_owned
#5701 - Make it possible to allow
unsafe_derive_deserialize
#5870 - Catch
ord.min(a).max(b)
where a < b inmin_max
#5871 - Make
clone_on_copy
suggestion machine applicable #5745 - Enable
len_zero
on ranges now thatis_empty
is stable on them #5961
- 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
inredundant_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 featureor_patterns
is not enabled #5758 - Avoid linting if key borrows in
unnecessary_sort_by
#5756 - Consider
Try
impl forPoll
when generating suggestions intry_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
- Improve readability of
shadow_unrelated
suggestion by truncating the RHS snippet #5788 - Suggest
filter_map
instead offlat_map
when mapping toOption
inmap_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
- Fix ICE caused by
needless_collect
#5877 - Fix ICE caused by
unnested_or_patterns
#5784
- Fix grammar of
await_holding_lock
documentation #5748
- Make lints adhere to the rustc dev guide #5888
Released 2020-08-27
- Move
cast_ptr_alignment
to pedantic #5667
- Improve
mem_replace_with_uninit
lint #5695
len_zero
: Avoid linting ranges when therange_is_empty
feature is not enabled #5656let_and_return
: Don't lint if a temporary borrow is involved #5680reversed_empty_ranges
: Avoid lintingN..N
in for loop arguments in #5692if_same_then_else
: Don't assume multiplication is always commutative #5702blacklisted_name
: Removebar
from the default configuration #5712redundant_pattern_matching
: Avoid suggesting non-const fn
calls in const contexts #5724
- Fix suggestion of
unit_arg
lint, so that it suggest semantic equivalent code #4455 - Add auto applicable suggestion to
macro_use_imports
#5279
- Fix ICE in the
consts
module of Clippy #5709
- Improve code examples across multiple lints #5664
- Introduce a
--rustc
flag toclippy-driver
, which turnsclippy-driver
intorustc
and passes all the given arguments torustc
. This is especially useful for tools that need therustc
version Clippy was compiled with, instead of the Clippy version. E.g.clippy-driver --rustc --version
will print the output ofrustc --version
. #5178 - New issue templates now make it easier to complain if Clippy is too annoying or not annoying enough! #5735
Released 2020-07-16
match_wildcard_for_single_variants
#5582unsafe_derive_deserialize
#5493if_let_mutex
#5332mismatched_target_os
#5506await_holding_lock
#5439match_on_vec_items
#5522manual_async_fn
#5576reversed_empty_ranges
#5583manual_non_exhaustive
#5550
- 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 tobind_instead_of_map
. #5529 - Rename
identity_conversion
touseless_conversion
. #5568 - Merge
block_in_if_condition_expr
andblock_in_if_condition_stmt
intoblocks_in_if_conditions
. #5563 - Merge
option_map_unwrap_or
,option_map_unwrap_or_else
andresult_map_unwrap_or_else
intomap_unwrap_or
. #5563 - Merge
option_unwrap_used
andresult_unwrap_used
intounwrap_used
. #5563 - Merge
option_expect_used
andresult_expect_used
intoexpect_used
. #5563 - Merge
for_loop_over_option
andfor_loop_over_result
intofor_loops_over_fallibles
. #5563
- Avoid running cargo lints when not enabled to improve performance. #5505
- Extend
useless_conversion
withTryFrom
andTryInto
. #5631 - Lint also in type parameters and where clauses in
unused_unit
. #5592 - Do not suggest deriving
Default
innew_without_default
. #5616
while_let_on_iterator
#5525empty_line_after_outer_attr
#5609unnecessary_unwrap
#5558comparison_chain
#5596- Don't trigger
used_underscore_binding
in await desugaring. #5535 - Don't trigger
borrowed_box
on mutable references. #5491 - Allow
1 << 0
inidentity_op
. #5602 - Allow
use super::*;
glob imports inwildcard_imports
. #5564 - Whitelist more words in
doc_markdown
. #5611 - Skip dev and build deps in
multiple_crate_versions
. #5636 - Honor
allow
attribute on arguments inptr_arg
. #5647 - Honor lint level attributes for
redundant_field_names
,just_underscores_and_digits
,many_single_char_names
andsimilar_names
. #5651 - Ignore calls to
len
inor_fun_call
. #4429
- Simplify suggestions in
manual_memcpy
. #5536 - Fix suggestion in
redundant_pattern_matching
for macros. #5511 - Avoid suggesting
copied()
for mutable references inmap_clone
. #5530 - Improve help message for
clone_double_ref
. #5547
- Fix ICE caused in unwrap module. #5590
- Fix ICE on rustc test issue-69020-assoc-const-arith-overflow.rs #5499
- Clarify the documentation of
unnecessary_mut_passed
. #5639 - Extend example for
unneeded_field_pattern
. #5541
Released 2020-06-04
explicit_deref_methods
#5226implicit_saturating_sub
#5427macro_use_imports
#5230verbose_file_reads
#5272future_not_send
#5423redundant_pub_crate
#5319large_const_arrays
#5248result_map_or_into_option
#5415redundant_allocation
#5349fn_address_comparisons
#5294vtable_address_comparisons
#5294
- 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
- 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 #5425large_enum_variant
now report the sizes of the largest and second-largest variants #5466bool_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 handleswhile let
#5483integer_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 anOption
#5473
many_single_char_names
#5468should_implement_trait
#5437unused_self
#5387redundant_clone
#5453precedence
#5445suspicious_op_assign_impl
#5424needless_lifetimes
#5293redundant_pattern
#5287inconsistent_digit_grouping
#5451
- Improved
question_mark
lint suggestion so that it doesn't add redundantas_ref()
#5481 - Improve the suggested placeholder in
option_map_unit_fn
#5292 - Improve suggestion for
match_single_binding
when triggered inside a closure #5350
- 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 thatuse ...::prelude::*
is not linted #5312
Released 2020-04-23
imprecise_flops
#4897suboptimal_flops
#4897wildcard_imports
#5029single_component_path_imports
#5058match_single_binding
#5061let_underscore_lock
#5101struct_excessive_bools
#5125fn_params_excessive_bools
#5125option_env_unwrap
#5148lossy_float_literal
#5202rest_pat_in_fully_bound_structs
#5258
- Move
unneeded_field_pattern
to pedantic group #5200
- Make
missing_errors_doc
lint also trigger onasync
functions #5181 - Add more constants to
approx_constant
#5193 - Extend
question_mark
lint #5266
- Improve suggestion when blocks of code are suggested #5134
misc_early
lints #5129missing_errors_doc
#5213- Fix ICE when evaluating
usize
s #5256
- Improve documentation of
iter_nth_zero
- Add documentation pages for stable releases #5171
- Clippy now completely runs on GitHub Actions #5190
Released 2020-03-12
filetype_is_file
#4543let_underscore_must_use
#4823modulo_arithmetic
#4867mem_replace_with_default
#4881mutable_key_type
#4885option_as_ref_deref
#4945wildcard_in_or_patterns
#4960iter_nth_zero
#4966invalid_atomic_ordering
#4999skip_while_next
#5067
- 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
- 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
map_clone
#4937replace_consts
#4977let_and_return
#5008eq_op
#5079possible_missing_comma
#5083debug_assert_with_mut_call
#5106- Don't trigger
let_underscore_must_use
in external macros #5082 - Don't trigger
empty_loop
inno_std
crates #5086
option_map_unwrap_or
#4634wildcard_enum_match_arm
#4934cognitive_complexity
#4935decimal_literal_representation
#4956unknown_clippy_lints
#4963explicit_into_iter_loop
#4978useless_attribute
#5022if_let_some_result
#5032
- Improve documentation of
empty_enum
,replace_consts
,redundant_clone
, anditerator_step_by_zero
Released 2020-01-30
- New Lints:
- 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
andwrite_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
Released 2019-12-19
- New Lints:
unneeded_wildcard_pattern
#4537needless_doctest_main
#4603suspicious_unary_op_formatting
#4615debug_assert_with_mut_call
#4680unused_self
#4619inefficient_to_string
#4683must_use_unit
#4560must_use_candidate
#4560double_must_use
#4560comparison_chain
#4569unsound_collection_transmute
#4592panic
#4657unreachable
#4657todo
#4657option_expect_used
#4657result_expect_used
#4657
- Move
redundant_clone
to perf group #4509 - Move
manual_mul_add
to nursery group #4736 - Expand
unit_cmp
to also work withassert_eq!
,debug_assert_eq!
,assert_ne!
anddebug_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
Released 2019-11-07
- New Lints:
- Deprecate
unused_collect
lint. This is fully covered by rustc's#[must_use]
oncollect
#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 #4425use_self
now works in constructors, too #4525cargo_common_metadata
now checks for license files #4518cognitive_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
Released 2019-09-26
- New Lints:
- Move
{unnecessary,panicking}_unwrap
out of nursery #4307 - Extend the
use_self
lint to suggest uses ofSelf::Variant
#4308 - Improve suggestion for needless return #4262
- Add auto-fixable suggestion for
let_unit
#4337 - Fix false positive in
pub_enum_variant_names
andenum_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
Released 2019-08-15
- New Lints:
- Renamed Lint:
const_static_lifetime
is now calledredundant_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 #4102needless_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
andwrite_with_newline
#4136 - Improve suggestions for
option_map_unwrap_or_else
andresult_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
Released 2019-07-04
- 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
intoredundant_closure
andredundant_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 onlet
s #4024 - Fix false positive in
module_name_repetitions
lint pertaining to attributes #4006 - Fix false positive on
assertions_on_constants
pertaining todebug_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
Released 2019-05-20
- New lint:
drop_bounds
to detectT: Drop
bounds - Split
redundant_closure
intoredundant_closure
andredundant_closure_for_method_calls
#4110 - Rename
cyclomatic_complexity
tocognitive_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
andwrite_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
(rust-lang#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
Released 2019-04-10
- New lint:
assertions_on_constants
to detect for exampleassert!(true)
- New lint:
dbg_macro
to detect uses of thedbg!
macro - New lint:
missing_const_for_fn
that can suggest functions to be madeconst
- New lint:
too_many_lines
to detect functions with excessive LOC. It can be configured using thetoo-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
andimplicit_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
Released 2019-02-26
- New lints:
implicit_return
,vec_box
,cast_ref_to_mut
- The
rust-clippy
repository is now part of therust-lang
org. - Rename
stutter
tomodule_name_repetitions
- Merge
new_without_default_derive
intonew_without_default
lint - Move
large_digit_groups
fromstyle
group topedantic
- Expand
bool_comparison
to check for<
,<=
,>
,>=
, and!=
comparisons against booleans - Expand
no_effect
to detect writes to constants such asA_CONST.field = 2
- Expand
redundant_clone
to work on struct fields - Expand
suspicious_else_formatting
to detectif .. {..} {..}
- Expand
use_self
to work on tuple structs and also in local macros - Fix ICE in
result_map_unit_fn
andoption_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
Released 2019-01-17
- New lints:
slow_vector_initialization
,mem_discriminant_non_enum
,redundant_clone
,wildcard_dependencies
,into_iter_on_ref
,into_iter_on_array
,deprecated_cfg_attr
,cargo_common_metadata
- Add support for
u128
andi128
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
frompedantic
group tostyle
Released 2018-12-06
- 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
whennew
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
Released 2018-10-25
- 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 whitelistunused_extern_crates
- Fix incorrect suggestion for
single_char_pattern
- Improve suggestion for
identity_conversion
lint - Move
explicit_iter_loop
andexplicit_into_iter_loop
fromstyle
group topedantic
- Move
range_plus_one
andrange_minus_one
fromnursery
group tocomplexity
- Move
shadow_unrelated
fromrestriction
group topedantic
- Move
indexing_slicing
frompedantic
group torestriction
Released 2018-09-13
- 🎉 🎉 Rust 1.29 is the first stable Rust that includes a bundled Clippy 🎉
🎉
You can now run
rustup component add clippy-preview
and thencargo 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
- Rustup to rustc 1.29.0-nightly (e06c87544 2018-07-06)
- Rustup to rustc 1.28.0-nightly (e3bf634e0 2018-06-28)
- Rustup to rustc 1.28.0-nightly (01cc982e9 2018-06-24)
- Rustup to rustc 1.28.0-nightly (523097979 2018-06-18)
- Rustup to rustc 1.28.0-nightly (86a8f1a63 2018-06-17)
- Rustup to rustc 1.28.0-nightly (2a0062974 2018-06-09)
- Rustup to rustc 1.28.0-nightly (5bf68db6e 2018-05-28)
- Rustup to rustc 1.28.0-nightly (990d8aa74 2018-05-25)
- Rename
unused_lifetimes
toextra_unused_lifetimes
because of naming conflict with new rustc lint
- Rustup to rustc 1.28.0-nightly (71e87be38 2018-05-22)
- Rustup to rustc 1.28.0-nightly (a3085756e 2018-05-19)
- Clippy attributes are now of the form
clippy::cyclomatic_complexity
instead ofclippy(cyclomatic_complexity)
- Rustup to rustc 1.28.0-nightly (952f344cd 2018-05-18)
- Rustup to rustc 1.27.0-nightly (2f2a11dfc 2018-05-16)
- Rustup to rustc 1.27.0-nightly (9fae15374 2018-05-13)
- Rustup to rustc 1.27.0-nightly (ff2ac35db 2018-05-12)
- Rustup to rustc 1.27.0-nightly (acd3871ba 2018-05-10)
- Rustup to rustc 1.27.0-nightly (428ea5f6b 2018-05-06)
- Rustup to rustc 1.27.0-nightly (e82261dfb 2018-05-03)
- Rustup to rustc 1.27.0-nightly (ac3c2288f 2018-04-18)
- 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
- Rustup to rustc 1.27.0-nightly (eeea94c11 2018-04-06)
- Rustup to rustc 1.27.0-nightly (fb44b4c0e 2018-04-04)
- New lint:
print_literal
- Rustup to rustc 1.26.0-nightly (ae544ee1c 2018-03-29)
- Lint audit; categorize lints as style, correctness, complexity, pedantic, nursery, restriction.
- Fix a bunch of intermittent cargo bugs
- Rustup to rustc 1.26.0-nightly (5508b2714 2018-03-18)
- Rustup to rustc 1.26.0-nightly (392645394 2018-03-15)
- New lint:
while_immutable_condition
- Rustup to rustc 1.26.0-nightly (322d7f7b9 2018-02-25)
- New lints:
redundant_field_names
,suspicious_arithmetic_impl
,suspicious_op_assign_impl
- Rustup to rustc 1.25.0-nightly (0c6091fbd 2018-02-04)
- Various false positive fixes
- Rustup to rustc 1.25.0-nightly (56733bc9f 2018-02-01)
- New lint:
question_mark
- Rustup to rustc 1.25.0-nightly (90eb44a58 2018-01-29)
- New lints:
double_comparisons
,empty_line_after_outer_attr
- Rustup to rustc 1.25.0-nightly (21882aad7 2018-01-28)
- New lint:
misaligned_transmute
- Rustup to rustc 1.25.0-nightly (a0dcecff9 2018-01-24)
- New lint:
decimal_literal_representation
- 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
- Rustup to rustc 1.25.0-nightly (3f92e8d89 2018-01-14)
- Rustup to rustc 1.25.0-nightly (61452e506 2018-01-09)
- Rustup to rustc 1.25.0-nightly (ee220daca 2018-01-07)
- Rustup to rustc 1.24.0-nightly (250b49205 2017-12-21)
- New lint:
match_as_ref
- Rustup to rustc 1.24.0-nightly (0077d128d 2017-12-14)
- Rustup to rustc 1.24.0-nightly (bb42071f6 2017-12-01)
- Rustup to rustc 1.23.0-nightly (63739ab7b 2017-11-21)
- Rustup to rustc 1.23.0-nightly (33374fa9d 2017-11-20)
- Rustup to rustc 1.23.0-nightly (d0f8e2913 2017-11-16)
- Rustup to rustc 1.23.0-nightly (ff0f5de3b 2017-11-14)
- Rustup to rustc 1.23.0-nightly (d6b06c63a 2017-11-09)
- 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
- Rustup to rustc 1.23.0-nightly (f0fe716db 2017-10-30)
- 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
- 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
- Rust upgrade to rustc 1.22.0-nightly (0e6f4cf51 2017-09-27)
- New lint:
mut_range_bound
- Update to rustc 1.22.0-nightly (6c476ce46 2017-09-25)
- New lint:
int_plus_one
- Update to rustc 1.22.0-nightly (14039a42a 2017-09-22)
- Update to rustc 1.22.0-nightly (0701b37d9 2017-09-18)
- New lint:
chars_last_cmp
- Improved suggestions for
needless_borrow
,ptr_arg
,
- Update to rustc 1.22.0-nightly (539f2083d 2017-09-13)
- Update to rustc 1.22.0-nightly (dd08c3070 2017-09-12)
- Update to rustc 1.22.0-nightly (eba374fb2 2017-09-11)
- New lint:
clone_on_ref_ptr
- 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)
- Update to rustc 1.22.0-nightly (981ce7d8d 2017-09-03)
- New lint:
unit_expr
- Update to rustc 1.22.0-nightly (744dd6c1d 2017-09-02)
- Update to rustc 1.21.0-nightly (c11f689d2 2017-08-29)
- New lint:
infinite_iter
,maybe_infinite_iter
,cast_lossless
- 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
- Update to rustc 1.21.0-nightly (8c303ed87 2017-08-20)
- New lint:
use_self
- Update to rustc 1.21.0-nightly (df511d554 2017-08-14)
- Update to rustc 1.21.0-nightly (13d94d5fa 2017-08-10)
- Update to rustc 1.21.0-nightly (215e0b10e 2017-08-08)
- Update to rustc 1.21.0-nightly (37c7d0ebb 2017-07-31)
- New lints:
unreadable_literal
,inconsistent_digit_grouping
,large_digit_groups
- Update to rustc 1.21.0-nightly (aac223f4f 2017-07-30)
- Update to rustc 1.21.0-nightly (52a330969 2017-07-27)
- Fixes false positives in
inline_always
- Fixes false negatives in
panic_params
- Update to rustc 1.20.0-nightly (afe145d22 2017-07-23)
- Update to rustc 1.20.0-nightly (086eaa78e 2017-07-15)
- Update to rustc 1.20.0-nightly (d84693b93 2017-07-09)
- Fix
cargo clippy
crashing ondylib
projects - Fix false positives around
nested_while_let
andnever_loop
- Update to rustc 1.20.0-nightly (067971139 2017-07-02)
- 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)
- Update to rustc 1.19.0-nightly (258ae6dd9 2017-06-15)
- Update to rustc 1.19.0-nightly (4bf5c99af 2017-06-10)
- Fix bugs with for loop desugaring
- Check for
AsRef
/AsMut
arguments inwrong_self_convention
- Update to rustc 1.19.0-nightly (0418fa9d3 2017-06-04)
- Update to rustc 1.19.0-nightly (6684d176c 2017-06-03)
- Update to rustc 1.19.0-nightly (557967766 2017-05-26)
- Update to rustc 1.19.0-nightly (5b13bff52 2017-05-23)
- Update to rustc 1.19.0-nightly (0ed1ec9f9 2017-05-18)
- Update to rustc 1.19.0-nightly (826d8f385 2017-05-13)
- Fix various bugs and some ices
- Update to rustc 1.19.0-nightly (2d4ed8e0c 2017-05-03)
- Update to rustc 1.19.0-nightly (6a5fc9eec 2017-05-02)
- Update to rustc 1.19.0-nightly (06fb4d256 2017-04-30)
- Update to rustc 1.18.0-nightly (94e884b63 2017-04-27)
- Update to rustc 1.18.0-nightly (036983201 2017-04-26)
- New lint:
needless_continue
- Update to rustc 1.18.0-nightly (2bd4b5c6d 2017-04-23)
- Update to rustc 1.18.0-nightly (9f2abadca 2017-04-18)
- Update to rustc 1.18.0-nightly (d5cf1cb64 2017-04-15)
- Fix various false positives
- Rustup to rustc 1.18.0-nightly (91ae22a01 2017-04-05)
- New lint:
op_ref
- Rustup to rustc 1.17.0-nightly (134c4a0f0 2017-03-20)
- Rustup to rustc 1.17.0-nightly (0aeb9c129 2017-03-15)
- Rustup to rustc 1.17.0-nightly (824c9ebbd 2017-03-12)
- Rustup to rustc 1.17.0-nightly (b1e31766d 2017-03-03)
- Rustup to rustc 1.17.0-nightly (be760566c 2017-02-28)
- Fix
cargo clippy
on 64 bit windows systems
- Rustup to rustc 1.17.0-nightly (60a0edc6c 2017-02-26)
- New lints:
zero_ptr
,never_loop
,mut_from_ref
- Rustup to rustc 1.17.0-nightly (c49d10207 2017-02-07)
- Tests are now ui tests (testing the exact output of rustc)
- Rustup to rustc 1.16.0-nightly (eedaa94e3 2017-02-02)
- New lint:
large_enum_variant
explicit_into_iter_loop
provides suggestions
- Rustup to rustc 1.16.0-nightly (df8debf6d 2017-01-25)
- Rustup to rustc 1.16.0-nightly (a52da95ce 2017-01-20)
- Add badges and categories to
Cargo.toml
- Update to rustc 1.16.0-nightly (c07a6ae77 2017-01-17)
- Update to rustc 1.16.0-nightly (2782e8f8f 2017-01-12)
- 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
- Fix FP introduced by rustup in
wrong_self_convention
- 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
- Update to rustc 1.15.0-nightly (8f02c429a 2016-12-15)
- Update to rustc 1.15.0-nightly (d5814b03e 2016-11-23)
- Update to rustc 1.15.0-nightly (3bf2be9ce 2016-11-22)
- Update to rustc 1.15.0-nightly (7b3eeea22 2016-11-21)
- New lint:
string_extend_chars
- Update to rustc 1.15.0-nightly (ac635aa95 2016-11-18)
- Update to rustc 1.15.0-nightly (0ed951993 2016-11-14)
- New lint:
get_unwrap
- Fixes an issue due to a change in how cargo handles
--sysroot
, which brokecargo clippy
- For convenience,
cargo clippy
defines acargo-clippy
feature. This was previously added for a short time under the nameclippy
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
- Rustup to rustc 1.14.0-nightly (f09420685 2016-10-20)
- New lint:
iter_skip_next
- Rustup to rustc 1.14.0-nightly (3210fd5c2 2016-10-05)
- Fixes bustage on Windows due to forbidden directory name
- Rustup to rustc 1.14.0-nightly (144af3e97 2016-10-02)
option_map_unwrap_or
andoption_map_unwrap_or_else
are now allowed by default.- New lint:
explicit_into_iter_loop
- Rustup to rustc 1.14.0-nightly (289f3a4ca 2016-09-29)
- Rustup to rustc 1.13.0-nightly (d0623cf7b 2016-09-26)
- Rustup to rustc 1.13.0-nightly (f1f40f850 2016-09-09)
- Rustup to rustc 1.13.0-nightly (cbe4de78e 2016-09-05)
- 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
andmatch_overlapping_arm
. You should now be able to#[allow/deny]
them individually and they are available directly throughcargo clippy
.
- Rustup to rustc 1.13.0-nightly (eac41469d 2016-08-30)
- New lints:
builtin_type_shadow
- Fix FP in
zero_prefixed_literal
and0b
/0o
- Rustup to rustc 1.13.0-nightly (a23064af5 2016-08-27)
- New lints:
missing_docs_in_private_items
,zero_prefixed_literal
- Fix ICE with
useless_attribute
useless_attribute
ignoresunused_imports
onuse
statements
- Rustup to rustc 1.13.0-nightly (aef6971ca 2016-08-17)
- Rustup to rustc 1.12.0-nightly (1bf5fa326 2016-08-16)
- New lints:
print_with_newline
,useless_attribute
- Rustup to rustc 1.12.0-nightly (197be89f3 2016-08-15)
- New lint:
module_inception
- 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
- Rustup to rustc 1.12.0-nightly (1225e122f 2016-07-30)
- New lints:
misrefactored_assign_op
,serde_api_misuse
- Rustup to rustc 1.12.0-nightly (f93aaf84c 2016-07-09)
- Major suggestions refactoring
- 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 theclippy
feature introduced in 0.0.76 anymore collapsible_if
now considersif let
- Rustup to rustc 1.11.0-nightly (5522e678b 2016-06-20)
- New lints:
stutter
anditer_nth
- Rustup to rustc 1.11.0-nightly (7d2f75a95 2016-06-09)
cargo clippy
now automatically defines theclippy
feature- New lint:
not_unsafe_ptr_arg_deref
- Rustup to rustc 1.11.0-nightly (763f9234b 2016-06-06)
- 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.
- Fix false positives in
useless_let_if_seq
- Fix false positives in
useless_let_if_seq
- Rustup to rustc 1.11.0-nightly (a967611d8 2016-05-30)
- New lint:
useless_let_if_seq
- Rustup to rustc 1.10.0-nightly (7bddce693 2016-05-27)
invalid_regex
andtrivial_regex
can now warn onRegexSet::new
,RegexBuilder::new
and byte regexes
- Rustup to rustc 1.10.0-nightly (476fe6eef 2016-05-21)
used_underscore_binding
has been madeAllow
temporarily
- Rustup to rustc 1.10.0-nightly (cd6a40017 2016-05-16)
- New lint:
unnecessary_operation
- Rustup to rustc 1.10.0-nightly (22ac88f1a 2016-05-11)
- New
cargo clippy
subcommand - New lints:
assign_op_pattern
,assign_ops
,needless_borrow
- Rustup to rustc 1.10.0-nightly (62e2b2fb7 2016-05-06)
- New lints:
float_arithmetic
,integer_arithmetic
- Rustup to rustc 1.10.0-nightly (645dd013a 2016-04-24)
- New lints:
temporary_cstring_as_ptr
,unsafe_removed_from_name
, andmem_forget
- Rustup to rustc 1.9.0-nightly (7979dd608 2016-04-07)
- Rustup to rustc 1.9.0-nightly (bf5da36f1 2016-04-06)
- Rustup to rustc 1.9.0-nightly (5ab11d72c 2016-04-02)
- New lint:
invalid_upcast_comparisons
- Rustup to rustc 1.9.0-nightly (e1195c24b 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 onfor … in vec![…]
- Rustup to rustc 1.9.0-nightly (d5a91e695 2016-03-26)
- New lint:
doc_markdown
- 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
- Update to rustc 1.9.0-nightly (0dcc413e4 2016-03-22)
- New lints:
many_single_char_names
andsimilar_names
- Update to rustc 1.9.0-nightly (02310fd31 2016-03-19)
- Update to rustc 1.9.0-nightly (c66d2380a 2016-03-15)
- Add a configuration file
- Add
str
to types considered bylen_zero
- New lints:
indexing_slicing
- Update to rustc 1.9.0-nightly (c9629d61c 2016-03-10)
- Update to rustc 1.9.0-nightly (eabfc160f 2016-03-08)
- New lints:
overflow_check_conditional
,unused_label
,new_without_default
- Fixed: ICE in
needless_range_loop
with globals
- Update to rustc 1.9.0-nightly (998a6720b 2016-03-07)
- New lint:
redundant_closure_call