clippy_lints/src/lib.rs

   1 // error-pattern:cargo-clippy
   2
   3 #![feature(box_syntax)]
   4 #![feature(rustc_private)]
   5 #![feature(slice_patterns)]
   6 #![feature(stmt_expr_attributes)]
   7 #![feature(range_contains)]
   8 #![feature(macro_vis_matcher)]
   9 #![allow(unknown_lints, shadow_reuse, missing_docs_in_private_items)]
  10 #![recursion_limit = "256"]
  11 #![allow(stable_features)]
  12 #![feature(iterator_find_map)]
  13 #![feature(macro_at_most_once_rep)]
  14 #![feature(rust_2018_preview)]
  15
  16 extern crate cargo_metadata;
  17 #[macro_use]
  18 extern crate rustc;
  19 extern crate rustc_target;
  20 extern crate rustc_typeck;
  21 extern crate syntax;
  22 extern crate syntax_pos;
  23
  24 extern crate toml;
  25
  26 // for unicode nfc normalization
  27
  28 extern crate unicode_normalization;
  29
  30 // for semver check in attrs.rs
  31
  32 extern crate semver;
  33
  34 // for regex checking
  35
  36 extern crate regex_syntax;
  37
  38 // for finding minimal boolean expressions
  39
  40 extern crate quine_mc_cluskey;
  41
  42 extern crate rustc_errors;
  43 extern crate rustc_plugin;
  44
  45 #[macro_use]
  46 extern crate matches as matches_macro;
  47
  48 extern crate serde;
  49 #[macro_use]
  50 extern crate serde_derive;
  51
  52 #[macro_use]
  53 extern crate lazy_static;
  54
  55 extern crate itertools;
  56 extern crate pulldown_cmark;
  57 extern crate url;
  58
  59 #[macro_use]
  60 extern crate if_chain;
  61
  62 macro_rules! declare_clippy_lint {
  63     { pub $name:tt, style, $description:tt } => {
  64         declare_lint! { pub $name, Warn, $description }
  65     };
  66     { pub $name:tt, correctness, $description:tt } => {
  67         declare_lint! { pub $name, Deny, $description }
  68     };
  69     { pub $name:tt, complexity, $description:tt } => {
  70         declare_lint! { pub $name, Warn, $description }
  71     };
  72     { pub $name:tt, perf, $description:tt } => {
  73         declare_lint! { pub $name, Warn, $description }
  74     };
  75     { pub $name:tt, pedantic, $description:tt } => {
  76         declare_lint! { pub $name, Allow, $description }
  77     };
  78     { pub $name:tt, restriction, $description:tt } => {
  79         declare_lint! { pub $name, Allow, $description }
  80     };
  81     { pub $name:tt, cargo, $description:tt } => {
  82         declare_lint! { pub $name, Allow, $description }
  83     };
  84     { pub $name:tt, nursery, $description:tt } => {
  85         declare_lint! { pub $name, Allow, $description }
  86     };
  87     { pub $name:tt, internal, $description:tt } => {
  88         declare_lint! { pub $name, Allow, $description }
  89     };
  90     { pub $name:tt, internal_warn, $description:tt } => {
  91         declare_lint! { pub $name, Warn, $description }
  92     };
  93 }
  94
  95 pub mod consts;
  96 #[macro_use]
  97 pub mod utils;
  98
  99 // begin lints modules, do not remove this comment, it’s used in `update_lints`
 100 pub mod approx_const;
 101 pub mod arithmetic;
 102 pub mod assign_ops;
 103 pub mod attrs;
 104 pub mod bit_mask;
 105 pub mod blacklisted_name;
 106 pub mod block_in_if_condition;
 107 pub mod booleans;
 108 pub mod bytecount;
 109 pub mod collapsible_if;
 110 pub mod const_static_lifetime;
 111 pub mod copies;
 112 pub mod cyclomatic_complexity;
 113 pub mod default_trait_access;
 114 pub mod derive;
 115 pub mod doc;
 116 pub mod double_comparison;
 117 pub mod double_parens;
 118 pub mod drop_forget_ref;
 119 pub mod duration_subsec;
 120 pub mod else_if_without_else;
 121 pub mod empty_enum;
 122 pub mod entry;
 123 pub mod enum_clike;
 124 pub mod enum_glob_use;
 125 pub mod enum_variants;
 126 pub mod eq_op;
 127 pub mod erasing_op;
 128 pub mod escape;
 129 pub mod eta_reduction;
 130 pub mod eval_order_dependence;
 131 pub mod excessive_precision;
 132 pub mod explicit_write;
 133 pub mod fallible_impl_from;
 134 pub mod format;
 135 pub mod formatting;
 136 pub mod functions;
 137 pub mod identity_conversion;
 138 pub mod identity_op;
 139 pub mod if_let_redundant_pattern_matching;
 140 pub mod if_not_else;
 141 pub mod indexing_slicing;
 142 pub mod infallible_destructuring_match;
 143 pub mod infinite_iter;
 144 pub mod inherent_impl;
 145 pub mod inline_fn_without_body;
 146 pub mod int_plus_one;
 147 pub mod invalid_ref;
 148 pub mod items_after_statements;
 149 pub mod large_enum_variant;
 150 pub mod len_zero;
 151 pub mod let_if_seq;
 152 pub mod lifetimes;
 153 pub mod literal_representation;
 154 pub mod loops;
 155 pub mod map_clone;
 156 pub mod map_unit_fn;
 157 pub mod matches;
 158 pub mod mem_forget;
 159 pub mod methods;
 160 pub mod minmax;
 161 pub mod misc;
 162 pub mod misc_early;
 163 pub mod missing_doc;
 164 pub mod multiple_crate_versions;
 165 pub mod mut_mut;
 166 pub mod mut_reference;
 167 pub mod mutex_atomic;
 168 pub mod needless_bool;
 169 pub mod needless_borrow;
 170 pub mod needless_borrowed_ref;
 171 pub mod needless_continue;
 172 pub mod needless_pass_by_value;
 173 pub mod needless_update;
 174 pub mod neg_cmp_op_on_partial_ord;
 175 pub mod neg_multiply;
 176 pub mod new_without_default;
 177 pub mod no_effect;
 178 pub mod non_expressive_names;
 179 pub mod ok_if_let;
 180 pub mod open_options;
 181 pub mod overflow_check_conditional;
 182 pub mod panic_unimplemented;
 183 pub mod partialeq_ne_impl;
 184 pub mod precedence;
 185 pub mod ptr;
 186 pub mod question_mark;
 187 pub mod ranges;
 188 pub mod redundant_field_names;
 189 pub mod reference;
 190 pub mod regex;
 191 pub mod replace_consts;
 192 pub mod returns;
 193 pub mod serde_api;
 194 pub mod shadow;
 195 pub mod strings;
 196 pub mod suspicious_trait_impl;
 197 pub mod swap;
 198 pub mod temporary_assignment;
 199 pub mod transmute;
 200 pub mod trivially_copy_pass_by_ref;
 201 pub mod types;
 202 pub mod unicode;
 203 pub mod unsafe_removed_from_name;
 204 pub mod unused_io_amount;
 205 pub mod unused_label;
 206 pub mod unwrap;
 207 pub mod use_self;
 208 pub mod vec;
 209 pub mod write;
 210 pub mod zero_div_zero;
 211 // end lints modules, do not remove this comment, it’s used in `update_lints`
 212
 213 mod reexport {
 214     pub use syntax::ast::{Name, NodeId};
 215 }
 216
 217 #[cfg_attr(rustfmt, rustfmt_skip)]
 218 pub fn register_plugins(reg: &mut rustc_plugin::Registry) {
 219     let conf = match utils::conf::file_from_args(reg.args()) {
 220         Ok(file_name) => {
 221             // if the user specified a file, it must exist, otherwise default to `clippy.toml` but
 222             // do not require the file to exist
 223             let file_name = if let Some(file_name) = file_name {
 224                 Some(file_name)
 225             } else {
 226                 match utils::conf::lookup_conf_file() {
 227                     Ok(path) => path,
 228                     Err(error) => {
 229                         reg.sess.struct_err(&format!("error finding Clippy's configuration file: {}", error)).emit();
 230                         None
 231                     }
 232                 }
 233             };
 234
 235             let file_name = file_name.map(|file_name| if file_name.is_relative() {
 236                 reg.sess
 237                     .local_crate_source_file
 238                     .as_ref()
 239                     .and_then(|file| std::path::Path::new(&file).parent().map(std::path::Path::to_path_buf))
 240                     .unwrap_or_default()
 241                     .join(file_name)
 242             } else {
 243                 file_name
 244             });
 245
 246             let (conf, errors) = utils::conf::read(file_name.as_ref().map(|p| p.as_ref()));
 247
 248             // all conf errors are non-fatal, we just use the default conf in case of error
 249             for error in errors {
 250                 reg.sess.struct_err(&format!("error reading Clippy's configuration file `{}`: {}", file_name.as_ref().and_then(|p| p.to_str()).unwrap_or(""), error)).emit();
 251             }
 252
 253             conf
 254         }
 255         Err((err, span)) => {
 256             reg.sess.struct_span_err(span, err)
 257                     .span_note(span, "Clippy will use default configuration")
 258                     .emit();
 259             toml::from_str("").expect("we never error on empty config files")
 260         }
 261     };
 262
 263     let mut store = reg.sess.lint_store.borrow_mut();
 264     store.register_removed(
 265         "should_assert_eq",
 266         "`assert!()` will be more flexible with RFC 2011",
 267     );
 268     store.register_removed(
 269         "extend_from_slice",
 270         "`.extend_from_slice(_)` is a faster way to extend a Vec by a slice",
 271     );
 272     store.register_removed(
 273         "range_step_by_zero",
 274         "`iterator.step_by(0)` panics nowadays",
 275     );
 276     store.register_removed(
 277         "unstable_as_slice",
 278         "`Vec::as_slice` has been stabilized in 1.7",
 279     );
 280     store.register_removed(
 281         "unstable_as_mut_slice",
 282         "`Vec::as_mut_slice` has been stabilized in 1.7",
 283     );
 284     store.register_removed(
 285         "str_to_string",
 286         "using `str::to_string` is common even today and specialization will likely happen soon",
 287     );
 288     store.register_removed(
 289         "string_to_string",
 290         "using `string::to_string` is common even today and specialization will likely happen soon",
 291     );
 292     store.register_removed(
 293         "misaligned_transmute",
 294         "this lint has been split into cast_ptr_alignment and transmute_ptr_to_ptr",
 295     );
 296     // end deprecated lints, do not remove this comment, it’s used in `update_lints`
 297
 298     reg.register_late_lint_pass(box serde_api::Serde);
 299     reg.register_early_lint_pass(box utils::internal_lints::Clippy);
 300     reg.register_late_lint_pass(box utils::internal_lints::LintWithoutLintPass::default());
 301     reg.register_late_lint_pass(box utils::inspector::Pass);
 302     reg.register_late_lint_pass(box utils::author::Pass);
 303     reg.register_late_lint_pass(box types::TypePass);
 304     reg.register_late_lint_pass(box booleans::NonminimalBool);
 305     reg.register_late_lint_pass(box eq_op::EqOp);
 306     reg.register_early_lint_pass(box enum_variants::EnumVariantNames::new(conf.enum_variant_name_threshold));
 307     reg.register_late_lint_pass(box enum_glob_use::EnumGlobUse);
 308     reg.register_late_lint_pass(box enum_clike::UnportableVariant);
 309     reg.register_late_lint_pass(box excessive_precision::ExcessivePrecision);
 310     reg.register_late_lint_pass(box bit_mask::BitMask::new(conf.verbose_bit_mask_threshold));
 311     reg.register_late_lint_pass(box ptr::PointerPass);
 312     reg.register_late_lint_pass(box needless_bool::NeedlessBool);
 313     reg.register_late_lint_pass(box needless_bool::BoolComparison);
 314     reg.register_late_lint_pass(box approx_const::Pass);
 315     reg.register_late_lint_pass(box misc::Pass);
 316     reg.register_early_lint_pass(box precedence::Precedence);
 317     reg.register_early_lint_pass(box needless_continue::NeedlessContinue);
 318     reg.register_late_lint_pass(box eta_reduction::EtaPass);
 319     reg.register_late_lint_pass(box identity_op::IdentityOp);
 320     reg.register_late_lint_pass(box erasing_op::ErasingOp);
 321     reg.register_early_lint_pass(box items_after_statements::ItemsAfterStatements);
 322     reg.register_late_lint_pass(box mut_mut::MutMut);
 323     reg.register_late_lint_pass(box mut_reference::UnnecessaryMutPassed);
 324     reg.register_late_lint_pass(box len_zero::LenZero);
 325     reg.register_late_lint_pass(box attrs::AttrPass);
 326     reg.register_early_lint_pass(box collapsible_if::CollapsibleIf);
 327     reg.register_late_lint_pass(box block_in_if_condition::BlockInIfCondition);
 328     reg.register_late_lint_pass(box unicode::Unicode);
 329     reg.register_late_lint_pass(box strings::StringAdd);
 330     reg.register_early_lint_pass(box returns::ReturnPass);
 331     reg.register_late_lint_pass(box methods::Pass);
 332     reg.register_late_lint_pass(box shadow::Pass);
 333     reg.register_late_lint_pass(box types::LetPass);
 334     reg.register_late_lint_pass(box types::UnitCmp);
 335     reg.register_late_lint_pass(box loops::Pass);
 336     reg.register_late_lint_pass(box lifetimes::LifetimePass);
 337     reg.register_late_lint_pass(box entry::HashMapLint);
 338     reg.register_late_lint_pass(box ranges::Pass);
 339     reg.register_late_lint_pass(box types::CastPass);
 340     reg.register_late_lint_pass(box types::TypeComplexityPass::new(conf.type_complexity_threshold));
 341     reg.register_late_lint_pass(box matches::MatchPass);
 342     reg.register_late_lint_pass(box minmax::MinMaxPass);
 343     reg.register_late_lint_pass(box open_options::NonSensical);
 344     reg.register_late_lint_pass(box zero_div_zero::Pass);
 345     reg.register_late_lint_pass(box mutex_atomic::MutexAtomic);
 346     reg.register_late_lint_pass(box needless_update::Pass);
 347     reg.register_late_lint_pass(box needless_borrow::NeedlessBorrow);
 348     reg.register_late_lint_pass(box needless_borrowed_ref::NeedlessBorrowedRef);
 349     reg.register_late_lint_pass(box no_effect::Pass);
 350     reg.register_late_lint_pass(box map_clone::Pass);
 351     reg.register_late_lint_pass(box temporary_assignment::Pass);
 352     reg.register_late_lint_pass(box transmute::Transmute);
 353     reg.register_late_lint_pass(
 354         box cyclomatic_complexity::CyclomaticComplexity::new(conf.cyclomatic_complexity_threshold)
 355     );
 356     reg.register_late_lint_pass(box escape::Pass{too_large_for_stack: conf.too_large_for_stack});
 357     reg.register_early_lint_pass(box misc_early::MiscEarly);
 358     reg.register_late_lint_pass(box panic_unimplemented::Pass);
 359     reg.register_late_lint_pass(box strings::StringLitAsBytes);
 360     reg.register_late_lint_pass(box derive::Derive);
 361     reg.register_late_lint_pass(box types::CharLitAsU8);
 362     reg.register_late_lint_pass(box write::Pass);
 363     reg.register_late_lint_pass(box vec::Pass);
 364     reg.register_early_lint_pass(box non_expressive_names::NonExpressiveNames {
 365         single_char_binding_names_threshold: conf.single_char_binding_names_threshold,
 366     });
 367     reg.register_late_lint_pass(box drop_forget_ref::Pass);
 368     reg.register_late_lint_pass(box empty_enum::EmptyEnum);
 369     reg.register_late_lint_pass(box types::AbsurdExtremeComparisons);
 370     reg.register_late_lint_pass(box types::InvalidUpcastComparisons);
 371     reg.register_late_lint_pass(box regex::Pass::default());
 372     reg.register_late_lint_pass(box copies::CopyAndPaste);
 373     reg.register_late_lint_pass(box format::Pass);
 374     reg.register_early_lint_pass(box formatting::Formatting);
 375     reg.register_late_lint_pass(box swap::Swap);
 376     reg.register_early_lint_pass(box if_not_else::IfNotElse);
 377     reg.register_early_lint_pass(box else_if_without_else::ElseIfWithoutElse);
 378     reg.register_early_lint_pass(box int_plus_one::IntPlusOne);
 379     reg.register_late_lint_pass(box overflow_check_conditional::OverflowCheckConditional);
 380     reg.register_late_lint_pass(box unused_label::UnusedLabel);
 381     reg.register_late_lint_pass(box new_without_default::NewWithoutDefault);
 382     reg.register_late_lint_pass(box blacklisted_name::BlackListedName::new(conf.blacklisted_names));
 383     reg.register_late_lint_pass(box functions::Functions::new(conf.too_many_arguments_threshold));
 384     reg.register_early_lint_pass(box doc::Doc::new(conf.doc_valid_idents));
 385     reg.register_late_lint_pass(box neg_multiply::NegMultiply);
 386     reg.register_early_lint_pass(box unsafe_removed_from_name::UnsafeNameRemoval);
 387     reg.register_late_lint_pass(box mem_forget::MemForget);
 388     reg.register_late_lint_pass(box arithmetic::Arithmetic::default());
 389     reg.register_late_lint_pass(box assign_ops::AssignOps);
 390     reg.register_late_lint_pass(box let_if_seq::LetIfSeq);
 391     reg.register_late_lint_pass(box eval_order_dependence::EvalOrderDependence);
 392     reg.register_late_lint_pass(box missing_doc::MissingDoc::new());
 393     reg.register_late_lint_pass(box ok_if_let::Pass);
 394     reg.register_late_lint_pass(box if_let_redundant_pattern_matching::Pass);
 395     reg.register_late_lint_pass(box partialeq_ne_impl::Pass);
 396     reg.register_early_lint_pass(box reference::Pass);
 397     reg.register_early_lint_pass(box reference::DerefPass);
 398     reg.register_early_lint_pass(box double_parens::DoubleParens);
 399     reg.register_late_lint_pass(box unused_io_amount::UnusedIoAmount);
 400     reg.register_late_lint_pass(box large_enum_variant::LargeEnumVariant::new(conf.enum_variant_size_threshold));
 401     reg.register_late_lint_pass(box explicit_write::Pass);
 402     reg.register_late_lint_pass(box needless_pass_by_value::NeedlessPassByValue);
 403     reg.register_late_lint_pass(box trivially_copy_pass_by_ref::TriviallyCopyPassByRef::new(
 404             conf.trivial_copy_size_limit,
 405             &reg.sess.target,
 406     ));
 407     reg.register_early_lint_pass(box literal_representation::LiteralDigitGrouping);
 408     reg.register_early_lint_pass(box literal_representation::LiteralRepresentation::new(
 409             conf.literal_representation_threshold
 410     ));
 411     reg.register_late_lint_pass(box use_self::UseSelf);
 412     reg.register_late_lint_pass(box bytecount::ByteCount);
 413     reg.register_late_lint_pass(box infinite_iter::Pass);
 414     reg.register_late_lint_pass(box inline_fn_without_body::Pass);
 415     reg.register_late_lint_pass(box invalid_ref::InvalidRef);
 416     reg.register_late_lint_pass(box identity_conversion::IdentityConversion::default());
 417     reg.register_late_lint_pass(box types::ImplicitHasher);
 418     reg.register_early_lint_pass(box const_static_lifetime::StaticConst);
 419     reg.register_late_lint_pass(box fallible_impl_from::FallibleImplFrom);
 420     reg.register_late_lint_pass(box replace_consts::ReplaceConsts);
 421     reg.register_late_lint_pass(box types::UnitArg);
 422     reg.register_late_lint_pass(box double_comparison::DoubleComparisonPass);
 423     reg.register_late_lint_pass(box question_mark::QuestionMarkPass);
 424     reg.register_late_lint_pass(box suspicious_trait_impl::SuspiciousImpl);
 425     reg.register_late_lint_pass(box redundant_field_names::RedundantFieldNames);
 426     reg.register_early_lint_pass(box multiple_crate_versions::Pass);
 427     reg.register_late_lint_pass(box map_unit_fn::Pass);
 428     reg.register_late_lint_pass(box infallible_destructuring_match::Pass);
 429     reg.register_late_lint_pass(box inherent_impl::Pass::default());
 430     reg.register_late_lint_pass(box neg_cmp_op_on_partial_ord::NoNegCompOpForPartialOrd);
 431     reg.register_late_lint_pass(box unwrap::Pass);
 432     reg.register_late_lint_pass(box duration_subsec::DurationSubsec);
 433     reg.register_late_lint_pass(box default_trait_access::DefaultTraitAccess);
 434     reg.register_late_lint_pass(box indexing_slicing::IndexingSlicing);
 435
 436     reg.register_lint_group("clippy_restriction", vec![
 437         arithmetic::FLOAT_ARITHMETIC,
 438         arithmetic::INTEGER_ARITHMETIC,
 439         assign_ops::ASSIGN_OPS,
 440         else_if_without_else::ELSE_IF_WITHOUT_ELSE,
 441         inherent_impl::MULTIPLE_INHERENT_IMPL,
 442         literal_representation::DECIMAL_LITERAL_REPRESENTATION,
 443         mem_forget::MEM_FORGET,
 444         methods::CLONE_ON_REF_PTR,
 445         methods::OPTION_UNWRAP_USED,
 446         methods::RESULT_UNWRAP_USED,
 447         methods::WRONG_PUB_SELF_CONVENTION,
 448         misc::FLOAT_CMP_CONST,
 449         missing_doc::MISSING_DOCS_IN_PRIVATE_ITEMS,
 450         panic_unimplemented::UNIMPLEMENTED,
 451         shadow::SHADOW_REUSE,
 452         shadow::SHADOW_SAME,
 453         shadow::SHADOW_UNRELATED,
 454         strings::STRING_ADD,
 455         write::PRINT_STDOUT,
 456         write::USE_DEBUG,
 457     ]);
 458
 459     reg.register_lint_group("clippy_pedantic", vec![
 460         attrs::INLINE_ALWAYS,
 461         copies::MATCH_SAME_ARMS,
 462         derive::EXPL_IMPL_CLONE_ON_COPY,
 463         doc::DOC_MARKDOWN,
 464         empty_enum::EMPTY_ENUM,
 465         enum_glob_use::ENUM_GLOB_USE,
 466         enum_variants::PUB_ENUM_VARIANT_NAMES,
 467         enum_variants::STUTTER,
 468         if_not_else::IF_NOT_ELSE,
 469         indexing_slicing::INDEXING_SLICING,
 470         infinite_iter::MAYBE_INFINITE_ITER,
 471         items_after_statements::ITEMS_AFTER_STATEMENTS,
 472         matches::SINGLE_MATCH_ELSE,
 473         methods::FILTER_MAP,
 474         methods::OPTION_MAP_UNWRAP_OR,
 475         methods::OPTION_MAP_UNWRAP_OR_ELSE,
 476         methods::RESULT_MAP_UNWRAP_OR_ELSE,
 477         misc::USED_UNDERSCORE_BINDING,
 478         misc_early::UNSEPARATED_LITERAL_SUFFIX,
 479         mut_mut::MUT_MUT,
 480         needless_continue::NEEDLESS_CONTINUE,
 481         non_expressive_names::SIMILAR_NAMES,
 482         replace_consts::REPLACE_CONSTS,
 483         strings::STRING_ADD_ASSIGN,
 484         types::CAST_POSSIBLE_TRUNCATION,
 485         types::CAST_POSSIBLE_WRAP,
 486         types::CAST_PRECISION_LOSS,
 487         types::CAST_SIGN_LOSS,
 488         types::INVALID_UPCAST_COMPARISONS,
 489         types::LINKEDLIST,
 490         unicode::NON_ASCII_LITERAL,
 491         unicode::UNICODE_NOT_NFC,
 492         use_self::USE_SELF,
 493     ]);
 494
 495     reg.register_lint_group("clippy_internal", vec![
 496         utils::internal_lints::CLIPPY_LINTS_INTERNAL,
 497         utils::internal_lints::LINT_WITHOUT_LINT_PASS,
 498     ]);
 499
 500     reg.register_lint_group("clippy", vec![
 501         approx_const::APPROX_CONSTANT,
 502         assign_ops::ASSIGN_OP_PATTERN,
 503         assign_ops::MISREFACTORED_ASSIGN_OP,
 504         attrs::DEPRECATED_SEMVER,
 505         attrs::USELESS_ATTRIBUTE,
 506         bit_mask::BAD_BIT_MASK,
 507         bit_mask::INEFFECTIVE_BIT_MASK,
 508         bit_mask::VERBOSE_BIT_MASK,
 509         blacklisted_name::BLACKLISTED_NAME,
 510         block_in_if_condition::BLOCK_IN_IF_CONDITION_EXPR,
 511         block_in_if_condition::BLOCK_IN_IF_CONDITION_STMT,
 512         booleans::LOGIC_BUG,
 513         booleans::NONMINIMAL_BOOL,
 514         bytecount::NAIVE_BYTECOUNT,
 515         collapsible_if::COLLAPSIBLE_IF,
 516         const_static_lifetime::CONST_STATIC_LIFETIME,
 517         copies::IF_SAME_THEN_ELSE,
 518         copies::IFS_SAME_COND,
 519         cyclomatic_complexity::CYCLOMATIC_COMPLEXITY,
 520         default_trait_access::DEFAULT_TRAIT_ACCESS,
 521         derive::DERIVE_HASH_XOR_EQ,
 522         double_comparison::DOUBLE_COMPARISONS,
 523         double_parens::DOUBLE_PARENS,
 524         drop_forget_ref::DROP_COPY,
 525         drop_forget_ref::DROP_REF,
 526         drop_forget_ref::FORGET_COPY,
 527         drop_forget_ref::FORGET_REF,
 528         duration_subsec::DURATION_SUBSEC,
 529         entry::MAP_ENTRY,
 530         enum_clike::ENUM_CLIKE_UNPORTABLE_VARIANT,
 531         enum_variants::ENUM_VARIANT_NAMES,
 532         enum_variants::MODULE_INCEPTION,
 533         eq_op::EQ_OP,
 534         eq_op::OP_REF,
 535         erasing_op::ERASING_OP,
 536         escape::BOXED_LOCAL,
 537         eta_reduction::REDUNDANT_CLOSURE,
 538         eval_order_dependence::DIVERGING_SUB_EXPRESSION,
 539         eval_order_dependence::EVAL_ORDER_DEPENDENCE,
 540         excessive_precision::EXCESSIVE_PRECISION,
 541         explicit_write::EXPLICIT_WRITE,
 542         format::USELESS_FORMAT,
 543         formatting::POSSIBLE_MISSING_COMMA,
 544         formatting::SUSPICIOUS_ASSIGNMENT_FORMATTING,
 545         formatting::SUSPICIOUS_ELSE_FORMATTING,
 546         functions::NOT_UNSAFE_PTR_ARG_DEREF,
 547         functions::TOO_MANY_ARGUMENTS,
 548         identity_conversion::IDENTITY_CONVERSION,
 549         identity_op::IDENTITY_OP,
 550         if_let_redundant_pattern_matching::IF_LET_REDUNDANT_PATTERN_MATCHING,
 551         indexing_slicing::OUT_OF_BOUNDS_INDEXING,
 552         infallible_destructuring_match::INFALLIBLE_DESTRUCTURING_MATCH,
 553         infinite_iter::INFINITE_ITER,
 554         inline_fn_without_body::INLINE_FN_WITHOUT_BODY,
 555         int_plus_one::INT_PLUS_ONE,
 556         invalid_ref::INVALID_REF,
 557         large_enum_variant::LARGE_ENUM_VARIANT,
 558         len_zero::LEN_WITHOUT_IS_EMPTY,
 559         len_zero::LEN_ZERO,
 560         let_if_seq::USELESS_LET_IF_SEQ,
 561         lifetimes::EXTRA_UNUSED_LIFETIMES,
 562         lifetimes::NEEDLESS_LIFETIMES,
 563         literal_representation::INCONSISTENT_DIGIT_GROUPING,
 564         literal_representation::LARGE_DIGIT_GROUPS,
 565         literal_representation::UNREADABLE_LITERAL,
 566         loops::EMPTY_LOOP,
 567         loops::EXPLICIT_COUNTER_LOOP,
 568         loops::EXPLICIT_INTO_ITER_LOOP,
 569         loops::EXPLICIT_ITER_LOOP,
 570         loops::FOR_KV_MAP,
 571         loops::FOR_LOOP_OVER_OPTION,
 572         loops::FOR_LOOP_OVER_RESULT,
 573         loops::ITER_NEXT_LOOP,
 574         loops::MANUAL_MEMCPY,
 575         loops::MUT_RANGE_BOUND,
 576         loops::NEEDLESS_RANGE_LOOP,
 577         loops::NEVER_LOOP,
 578         loops::REVERSE_RANGE_LOOP,
 579         loops::UNUSED_COLLECT,
 580         loops::WHILE_IMMUTABLE_CONDITION,
 581         loops::WHILE_LET_LOOP,
 582         loops::WHILE_LET_ON_ITERATOR,
 583         map_clone::MAP_CLONE,
 584         map_unit_fn::OPTION_MAP_UNIT_FN,
 585         map_unit_fn::RESULT_MAP_UNIT_FN,
 586         matches::MATCH_AS_REF,
 587         matches::MATCH_BOOL,
 588         matches::MATCH_OVERLAPPING_ARM,
 589         matches::MATCH_REF_PATS,
 590         matches::MATCH_WILD_ERR_ARM,
 591         matches::SINGLE_MATCH,
 592         methods::CHARS_LAST_CMP,
 593         methods::CHARS_NEXT_CMP,
 594         methods::CLONE_DOUBLE_REF,
 595         methods::CLONE_ON_COPY,
 596         methods::EXPECT_FUN_CALL,
 597         methods::FILTER_NEXT,
 598         methods::GET_UNWRAP,
 599         methods::ITER_CLONED_COLLECT,
 600         methods::ITER_NTH,
 601         methods::ITER_SKIP_NEXT,
 602         methods::NEW_RET_NO_SELF,
 603         methods::OK_EXPECT,
 604         methods::OPTION_MAP_OR_NONE,
 605         methods::OR_FUN_CALL,
 606         methods::SEARCH_IS_SOME,
 607         methods::SHOULD_IMPLEMENT_TRAIT,
 608         methods::SINGLE_CHAR_PATTERN,
 609         methods::STRING_EXTEND_CHARS,
 610         methods::TEMPORARY_CSTRING_AS_PTR,
 611         methods::UNNECESSARY_FOLD,
 612         methods::USELESS_ASREF,
 613         methods::WRONG_SELF_CONVENTION,
 614         minmax::MIN_MAX,
 615         misc::CMP_NAN,
 616         misc::CMP_OWNED,
 617         misc::FLOAT_CMP,
 618         misc::MODULO_ONE,
 619         misc::REDUNDANT_PATTERN,
 620         misc::SHORT_CIRCUIT_STATEMENT,
 621         misc::TOPLEVEL_REF_ARG,
 622         misc::ZERO_PTR,
 623         misc_early::BUILTIN_TYPE_SHADOW,
 624         misc_early::DOUBLE_NEG,
 625         misc_early::DUPLICATE_UNDERSCORE_ARGUMENT,
 626         misc_early::MIXED_CASE_HEX_LITERALS,
 627         misc_early::REDUNDANT_CLOSURE_CALL,
 628         misc_early::UNNEEDED_FIELD_PATTERN,
 629         misc_early::ZERO_PREFIXED_LITERAL,
 630         mut_reference::UNNECESSARY_MUT_PASSED,
 631         mutex_atomic::MUTEX_ATOMIC,
 632         needless_bool::BOOL_COMPARISON,
 633         needless_bool::NEEDLESS_BOOL,
 634         needless_borrowed_ref::NEEDLESS_BORROWED_REFERENCE,
 635         needless_pass_by_value::NEEDLESS_PASS_BY_VALUE,
 636         needless_update::NEEDLESS_UPDATE,
 637         neg_cmp_op_on_partial_ord::NEG_CMP_OP_ON_PARTIAL_ORD,
 638         neg_multiply::NEG_MULTIPLY,
 639         new_without_default::NEW_WITHOUT_DEFAULT,
 640         new_without_default::NEW_WITHOUT_DEFAULT_DERIVE,
 641         no_effect::NO_EFFECT,
 642         no_effect::UNNECESSARY_OPERATION,
 643         non_expressive_names::JUST_UNDERSCORES_AND_DIGITS,
 644         non_expressive_names::MANY_SINGLE_CHAR_NAMES,
 645         ok_if_let::IF_LET_SOME_RESULT,
 646         open_options::NONSENSICAL_OPEN_OPTIONS,
 647         overflow_check_conditional::OVERFLOW_CHECK_CONDITIONAL,
 648         panic_unimplemented::PANIC_PARAMS,
 649         partialeq_ne_impl::PARTIALEQ_NE_IMPL,
 650         precedence::PRECEDENCE,
 651         ptr::CMP_NULL,
 652         ptr::MUT_FROM_REF,
 653         ptr::PTR_ARG,
 654         question_mark::QUESTION_MARK,
 655         ranges::ITERATOR_STEP_BY_ZERO,
 656         ranges::RANGE_MINUS_ONE,
 657         ranges::RANGE_ZIP_WITH_LEN,
 658         redundant_field_names::REDUNDANT_FIELD_NAMES,
 659         reference::DEREF_ADDROF,
 660         reference::REF_IN_DEREF,
 661         regex::INVALID_REGEX,
 662         regex::REGEX_MACRO,
 663         regex::TRIVIAL_REGEX,
 664         returns::LET_AND_RETURN,
 665         returns::NEEDLESS_RETURN,
 666         serde_api::SERDE_API_MISUSE,
 667         strings::STRING_LIT_AS_BYTES,
 668         suspicious_trait_impl::SUSPICIOUS_ARITHMETIC_IMPL,
 669         suspicious_trait_impl::SUSPICIOUS_OP_ASSIGN_IMPL,
 670         swap::ALMOST_SWAPPED,
 671         swap::MANUAL_SWAP,
 672         temporary_assignment::TEMPORARY_ASSIGNMENT,
 673         transmute::CROSSPOINTER_TRANSMUTE,
 674         transmute::TRANSMUTE_BYTES_TO_STR,
 675         transmute::TRANSMUTE_INT_TO_BOOL,
 676         transmute::TRANSMUTE_INT_TO_CHAR,
 677         transmute::TRANSMUTE_INT_TO_FLOAT,
 678         transmute::TRANSMUTE_PTR_TO_PTR,
 679         transmute::TRANSMUTE_PTR_TO_REF,
 680         transmute::USELESS_TRANSMUTE,
 681         transmute::WRONG_TRANSMUTE,
 682         trivially_copy_pass_by_ref::TRIVIALLY_COPY_PASS_BY_REF,
 683         types::ABSURD_EXTREME_COMPARISONS,
 684         types::BORROWED_BOX,
 685         types::BOX_VEC,
 686         types::CAST_LOSSLESS,
 687         types::CAST_PTR_ALIGNMENT,
 688         types::CHAR_LIT_AS_U8,
 689         types::FN_TO_NUMERIC_CAST,
 690         types::FN_TO_NUMERIC_CAST_WITH_TRUNCATION,
 691         types::IMPLICIT_HASHER,
 692         types::LET_UNIT_VALUE,
 693         types::OPTION_OPTION,
 694         types::TYPE_COMPLEXITY,
 695         types::UNIT_ARG,
 696         types::UNIT_CMP,
 697         types::UNNECESSARY_CAST,
 698         unicode::ZERO_WIDTH_SPACE,
 699         unsafe_removed_from_name::UNSAFE_REMOVED_FROM_NAME,
 700         unused_io_amount::UNUSED_IO_AMOUNT,
 701         unused_label::UNUSED_LABEL,
 702         vec::USELESS_VEC,
 703         write::PRINT_LITERAL,
 704         write::PRINT_WITH_NEWLINE,
 705         write::PRINTLN_EMPTY_STRING,
 706         write::WRITE_LITERAL,
 707         write::WRITE_WITH_NEWLINE,
 708         write::WRITELN_EMPTY_STRING,
 709         zero_div_zero::ZERO_DIVIDED_BY_ZERO,
 710     ]);
 711
 712     reg.register_lint_group("clippy_style", vec![
 713         assign_ops::ASSIGN_OP_PATTERN,
 714         bit_mask::VERBOSE_BIT_MASK,
 715         blacklisted_name::BLACKLISTED_NAME,
 716         block_in_if_condition::BLOCK_IN_IF_CONDITION_EXPR,
 717         block_in_if_condition::BLOCK_IN_IF_CONDITION_STMT,
 718         collapsible_if::COLLAPSIBLE_IF,
 719         const_static_lifetime::CONST_STATIC_LIFETIME,
 720         default_trait_access::DEFAULT_TRAIT_ACCESS,
 721         enum_variants::ENUM_VARIANT_NAMES,
 722         enum_variants::MODULE_INCEPTION,
 723         eq_op::OP_REF,
 724         eta_reduction::REDUNDANT_CLOSURE,
 725         excessive_precision::EXCESSIVE_PRECISION,
 726         formatting::SUSPICIOUS_ASSIGNMENT_FORMATTING,
 727         formatting::SUSPICIOUS_ELSE_FORMATTING,
 728         if_let_redundant_pattern_matching::IF_LET_REDUNDANT_PATTERN_MATCHING,
 729         infallible_destructuring_match::INFALLIBLE_DESTRUCTURING_MATCH,
 730         len_zero::LEN_WITHOUT_IS_EMPTY,
 731         len_zero::LEN_ZERO,
 732         let_if_seq::USELESS_LET_IF_SEQ,
 733         literal_representation::INCONSISTENT_DIGIT_GROUPING,
 734         literal_representation::LARGE_DIGIT_GROUPS,
 735         literal_representation::UNREADABLE_LITERAL,
 736         loops::EMPTY_LOOP,
 737         loops::EXPLICIT_INTO_ITER_LOOP,
 738         loops::EXPLICIT_ITER_LOOP,
 739         loops::FOR_KV_MAP,
 740         loops::NEEDLESS_RANGE_LOOP,
 741         loops::WHILE_LET_ON_ITERATOR,
 742         map_clone::MAP_CLONE,
 743         matches::MATCH_BOOL,
 744         matches::MATCH_OVERLAPPING_ARM,
 745         matches::MATCH_REF_PATS,
 746         matches::MATCH_WILD_ERR_ARM,
 747         matches::SINGLE_MATCH,
 748         methods::CHARS_LAST_CMP,
 749         methods::GET_UNWRAP,
 750         methods::ITER_CLONED_COLLECT,
 751         methods::ITER_SKIP_NEXT,
 752         methods::NEW_RET_NO_SELF,
 753         methods::OK_EXPECT,
 754         methods::OPTION_MAP_OR_NONE,
 755         methods::SHOULD_IMPLEMENT_TRAIT,
 756         methods::STRING_EXTEND_CHARS,
 757         methods::UNNECESSARY_FOLD,
 758         methods::WRONG_SELF_CONVENTION,
 759         misc::REDUNDANT_PATTERN,
 760         misc::TOPLEVEL_REF_ARG,
 761         misc::ZERO_PTR,
 762         misc_early::BUILTIN_TYPE_SHADOW,
 763         misc_early::DOUBLE_NEG,
 764         misc_early::DUPLICATE_UNDERSCORE_ARGUMENT,
 765         misc_early::MIXED_CASE_HEX_LITERALS,
 766         misc_early::UNNEEDED_FIELD_PATTERN,
 767         mut_reference::UNNECESSARY_MUT_PASSED,
 768         needless_pass_by_value::NEEDLESS_PASS_BY_VALUE,
 769         neg_multiply::NEG_MULTIPLY,
 770         new_without_default::NEW_WITHOUT_DEFAULT,
 771         new_without_default::NEW_WITHOUT_DEFAULT_DERIVE,
 772         non_expressive_names::JUST_UNDERSCORES_AND_DIGITS,
 773         non_expressive_names::MANY_SINGLE_CHAR_NAMES,
 774         ok_if_let::IF_LET_SOME_RESULT,
 775         panic_unimplemented::PANIC_PARAMS,
 776         ptr::CMP_NULL,
 777         ptr::PTR_ARG,
 778         question_mark::QUESTION_MARK,
 779         ranges::RANGE_MINUS_ONE,
 780         redundant_field_names::REDUNDANT_FIELD_NAMES,
 781         regex::REGEX_MACRO,
 782         regex::TRIVIAL_REGEX,
 783         returns::LET_AND_RETURN,
 784         returns::NEEDLESS_RETURN,
 785         strings::STRING_LIT_AS_BYTES,
 786         types::FN_TO_NUMERIC_CAST,
 787         types::IMPLICIT_HASHER,
 788         types::LET_UNIT_VALUE,
 789         unsafe_removed_from_name::UNSAFE_REMOVED_FROM_NAME,
 790         write::PRINT_LITERAL,
 791         write::PRINT_WITH_NEWLINE,
 792         write::PRINTLN_EMPTY_STRING,
 793         write::WRITE_LITERAL,
 794         write::WRITE_WITH_NEWLINE,
 795         write::WRITELN_EMPTY_STRING,
 796     ]);
 797
 798     reg.register_lint_group("clippy_complexity", vec![
 799         assign_ops::MISREFACTORED_ASSIGN_OP,
 800         booleans::NONMINIMAL_BOOL,
 801         cyclomatic_complexity::CYCLOMATIC_COMPLEXITY,
 802         double_comparison::DOUBLE_COMPARISONS,
 803         double_parens::DOUBLE_PARENS,
 804         duration_subsec::DURATION_SUBSEC,
 805         eval_order_dependence::DIVERGING_SUB_EXPRESSION,
 806         eval_order_dependence::EVAL_ORDER_DEPENDENCE,
 807         explicit_write::EXPLICIT_WRITE,
 808         format::USELESS_FORMAT,
 809         functions::TOO_MANY_ARGUMENTS,
 810         identity_conversion::IDENTITY_CONVERSION,
 811         identity_op::IDENTITY_OP,
 812         int_plus_one::INT_PLUS_ONE,
 813         lifetimes::EXTRA_UNUSED_LIFETIMES,
 814         lifetimes::NEEDLESS_LIFETIMES,
 815         loops::EXPLICIT_COUNTER_LOOP,
 816         loops::MUT_RANGE_BOUND,
 817         loops::WHILE_LET_LOOP,
 818         map_unit_fn::OPTION_MAP_UNIT_FN,
 819         map_unit_fn::RESULT_MAP_UNIT_FN,
 820         matches::MATCH_AS_REF,
 821         methods::CHARS_NEXT_CMP,
 822         methods::CLONE_ON_COPY,
 823         methods::FILTER_NEXT,
 824         methods::SEARCH_IS_SOME,
 825         methods::USELESS_ASREF,
 826         misc::SHORT_CIRCUIT_STATEMENT,
 827         misc_early::REDUNDANT_CLOSURE_CALL,
 828         misc_early::ZERO_PREFIXED_LITERAL,
 829         needless_bool::BOOL_COMPARISON,
 830         needless_bool::NEEDLESS_BOOL,
 831         needless_borrowed_ref::NEEDLESS_BORROWED_REFERENCE,
 832         needless_update::NEEDLESS_UPDATE,
 833         neg_cmp_op_on_partial_ord::NEG_CMP_OP_ON_PARTIAL_ORD,
 834         no_effect::NO_EFFECT,
 835         no_effect::UNNECESSARY_OPERATION,
 836         overflow_check_conditional::OVERFLOW_CHECK_CONDITIONAL,
 837         partialeq_ne_impl::PARTIALEQ_NE_IMPL,
 838         precedence::PRECEDENCE,
 839         ranges::RANGE_ZIP_WITH_LEN,
 840         reference::DEREF_ADDROF,
 841         reference::REF_IN_DEREF,
 842         swap::MANUAL_SWAP,
 843         temporary_assignment::TEMPORARY_ASSIGNMENT,
 844         transmute::CROSSPOINTER_TRANSMUTE,
 845         transmute::TRANSMUTE_BYTES_TO_STR,
 846         transmute::TRANSMUTE_INT_TO_BOOL,
 847         transmute::TRANSMUTE_INT_TO_CHAR,
 848         transmute::TRANSMUTE_INT_TO_FLOAT,
 849         transmute::TRANSMUTE_PTR_TO_PTR,
 850         transmute::TRANSMUTE_PTR_TO_REF,
 851         transmute::USELESS_TRANSMUTE,
 852         types::BORROWED_BOX,
 853         types::CAST_LOSSLESS,
 854         types::CHAR_LIT_AS_U8,
 855         types::OPTION_OPTION,
 856         types::TYPE_COMPLEXITY,
 857         types::UNIT_ARG,
 858         types::UNNECESSARY_CAST,
 859         unused_label::UNUSED_LABEL,
 860         zero_div_zero::ZERO_DIVIDED_BY_ZERO,
 861     ]);
 862
 863     reg.register_lint_group("clippy_correctness", vec![
 864         approx_const::APPROX_CONSTANT,
 865         attrs::DEPRECATED_SEMVER,
 866         attrs::USELESS_ATTRIBUTE,
 867         bit_mask::BAD_BIT_MASK,
 868         bit_mask::INEFFECTIVE_BIT_MASK,
 869         booleans::LOGIC_BUG,
 870         copies::IF_SAME_THEN_ELSE,
 871         copies::IFS_SAME_COND,
 872         derive::DERIVE_HASH_XOR_EQ,
 873         drop_forget_ref::DROP_COPY,
 874         drop_forget_ref::DROP_REF,
 875         drop_forget_ref::FORGET_COPY,
 876         drop_forget_ref::FORGET_REF,
 877         enum_clike::ENUM_CLIKE_UNPORTABLE_VARIANT,
 878         eq_op::EQ_OP,
 879         erasing_op::ERASING_OP,
 880         formatting::POSSIBLE_MISSING_COMMA,
 881         functions::NOT_UNSAFE_PTR_ARG_DEREF,
 882         indexing_slicing::OUT_OF_BOUNDS_INDEXING,
 883         infinite_iter::INFINITE_ITER,
 884         inline_fn_without_body::INLINE_FN_WITHOUT_BODY,
 885         invalid_ref::INVALID_REF,
 886         loops::FOR_LOOP_OVER_OPTION,
 887         loops::FOR_LOOP_OVER_RESULT,
 888         loops::ITER_NEXT_LOOP,
 889         loops::NEVER_LOOP,
 890         loops::REVERSE_RANGE_LOOP,
 891         loops::WHILE_IMMUTABLE_CONDITION,
 892         methods::CLONE_DOUBLE_REF,
 893         methods::TEMPORARY_CSTRING_AS_PTR,
 894         minmax::MIN_MAX,
 895         misc::CMP_NAN,
 896         misc::FLOAT_CMP,
 897         misc::MODULO_ONE,
 898         open_options::NONSENSICAL_OPEN_OPTIONS,
 899         ptr::MUT_FROM_REF,
 900         ranges::ITERATOR_STEP_BY_ZERO,
 901         regex::INVALID_REGEX,
 902         serde_api::SERDE_API_MISUSE,
 903         suspicious_trait_impl::SUSPICIOUS_ARITHMETIC_IMPL,
 904         suspicious_trait_impl::SUSPICIOUS_OP_ASSIGN_IMPL,
 905         swap::ALMOST_SWAPPED,
 906         transmute::WRONG_TRANSMUTE,
 907         types::ABSURD_EXTREME_COMPARISONS,
 908         types::CAST_PTR_ALIGNMENT,
 909         types::FN_TO_NUMERIC_CAST_WITH_TRUNCATION,
 910         types::UNIT_CMP,
 911         unicode::ZERO_WIDTH_SPACE,
 912         unused_io_amount::UNUSED_IO_AMOUNT,
 913     ]);
 914
 915     reg.register_lint_group("clippy_perf", vec![
 916         bytecount::NAIVE_BYTECOUNT,
 917         entry::MAP_ENTRY,
 918         escape::BOXED_LOCAL,
 919         large_enum_variant::LARGE_ENUM_VARIANT,
 920         loops::MANUAL_MEMCPY,
 921         loops::UNUSED_COLLECT,
 922         methods::EXPECT_FUN_CALL,
 923         methods::ITER_NTH,
 924         methods::OR_FUN_CALL,
 925         methods::SINGLE_CHAR_PATTERN,
 926         misc::CMP_OWNED,
 927         mutex_atomic::MUTEX_ATOMIC,
 928         trivially_copy_pass_by_ref::TRIVIALLY_COPY_PASS_BY_REF,
 929         types::BOX_VEC,
 930         vec::USELESS_VEC,
 931     ]);
 932
 933     reg.register_lint_group("clippy_cargo", vec![
 934         multiple_crate_versions::MULTIPLE_CRATE_VERSIONS,
 935     ]);
 936
 937     reg.register_lint_group("clippy_nursery", vec![
 938         attrs::EMPTY_LINE_AFTER_OUTER_ATTR,
 939         fallible_impl_from::FALLIBLE_IMPL_FROM,
 940         mutex_atomic::MUTEX_INTEGER,
 941         needless_borrow::NEEDLESS_BORROW,
 942         ranges::RANGE_PLUS_ONE,
 943         unwrap::PANICKING_UNWRAP,
 944         unwrap::UNNECESSARY_UNWRAP,
 945     ]);
 946 }
 947
 948 // only exists to let the dogfood integration test works.
 949 // Don't run clippy as an executable directly
 950 #[allow(dead_code, print_stdout)]
 951 fn main() {
 952     panic!("Please use the cargo-clippy executable");
 953 }