Sourced from rubocop's releases.

RuboCop v1.88.2

Bug fixes

• #15417: Fix a false negative for Lint/ToJSON, which did not flag singleton def self.to_json definitions. (@​bbatsov)
• #15418: Fix a false negative for Lint/UnreachableCode, which only flagged the first statement after a flow-of-control statement instead of every unreachable statement that followed it. (@​bbatsov)
• #15416: Fix a false negative for Lint/UselessNumericOperation, which only flagged bare method-call receivers and ignored local variables, instance/class/global variables, and constants (e.g. @x + 0, CONST * 1). (@​bbatsov)
• #15419: Fix a false negative for Lint/Void where safe-navigation calls to nonmutating methods (e.g. x&.sort) were not flagged when CheckForMethodsWithNoSideEffects is enabled. (@​bbatsov)
• #15421: Fix a false negative for Style/ArrayIntersect with the block form using include? (e.g. array1.any? { |e| array2.include?(e) }), which was only detected for member?. (@​bbatsov)
• #15420: Fix a false negative for Style/CollectionCompact, which did not flag grep_v(nil)/grep_v(NilClass) on a safe-navigation call (e.g. array&.grep_v(nil)). (@​bbatsov)
• #15422: Fix a false negative for Style/DefWithParentheses with a single-line definition whose body follows a semicolon (e.g. def foo(); end), where the parentheses can be safely omitted. (@​bbatsov)
• #15388: Fix a false negative for Style/MixinUsage when including multiple modules in one statement. (@​bbatsov)
• #15388: Fix a false negative for Style/ModuleFunction when the module body is a single statement. (@​bbatsov)
• #15388: Fix a false negative for Style/RedundantCurrentDirectoryInPath with double-quoted strings containing interpolation. (@​bbatsov)
• #15395: Fix a false negative for Style/RedundantHeredocDelimiterQuotes with double-quoted delimiters whose body contains interpolation or escapes. (@​bbatsov)
• #15409: Fix a false positive for Gemspec/DuplicatedAssignment with multiple specifications. (@​bbatsov)
• #15403: Fix a false positive for Layout/CommentIndentation with a comment above an inline access modifier (e.g. private def foo) when Layout/AccessModifierIndentation is configured with EnforcedStyle: outdent. (@​grk)
• #15372: Fix a false positive for Style/InvertibleUnlessCondition with a multi-statement begin condition. (@​bbatsov)
• #15360: Fix an incorrect autocorrect for Style/ArgumentsForwarding and Style/MethodDefParentheses when autocorrection conflicts while adding parentheses to method definition arguments. (@​koic)
• #15417: Fix an incorrect autocorrect for Lint/ToJSON that produced invalid Ruby (def to_json(*_args)()) when the method had explicit empty parentheses. (@​bbatsov)
• #15426: Fix an incorrect autocorrect for Style/MethodCallWithoutArgsParentheses when empty parentheses span multiple lines and the method call has a block. (@​koic)
• #15328: Fix a false positive for Style/HashConversion with a splat argument, which previously produced an invalid hash literal. (@​bbatsov)
• #15338: Fix a false positive for Style/HashLookupMethod with safe navigation, where the suggested bracket form would be the unreadable hash&.[](https://github.com/rubocop/rubocop/blob/HEAD/key). (@​bbatsov)
• #15397: Fix an incorrect autocorrect for Style/IdenticalConditionalBranches that hoisted the moved expression to column zero instead of matching the surrounding indentation. (@​bbatsov)
• #15372: Fix an incorrect autocorrect for Style/InvertibleUnlessCondition with mixed &&/|| conditions, which lost the required parentheses when inverting. (@​bbatsov)
• #15428: Fix an incorrect autocorrect for Style/TrivialAccessors when AllowPredicates: false is set and a trivial reader is defined as a predicate class method. (@​koic)
• #15402: Fix an infinite loop and file corruption for Layout/LineLength with SplitStrings when an over-long string is indented under a multi-line parent. (@​bbatsov)
• #15384: Fix a false positive and a false negative for Style/MissingRespondToMissing when method_missing is defined at the top level or alongside sibling classes. (@​bbatsov)
• #15432: Fix false positives in Layout/ElseAlignment when using else within a block that is part of a larger expression. (@​koic)
• #15423: Fix false positives in Layout/MultilineMethodCallIndentation when a method chain is nested inside a parenthesized argument list or a grouped expression within a hash pair value. (@​koic)
• #15424: Fix Style/StructInheritance autocorrect dropping leading indentation when class is inside a module or namespace. (@​amckinnie)
• #15325: Fix Style/DocumentationMethod ignoring AllowedMethods for inline modifier defs. (@​bbatsov)
• #15369: Fix a false positive for Style/LambdaCall when the argument list contains a comment, which the autocorrect would have dropped. (@​bbatsov)

Changes

• #15430: Improve performance of offense reporting by not allocating a new source range per offense outside of embedded sources. (@​bbatsov)
• #15430: Improve investigation performance by dispatching on_new_investigation, on_investigation_end, and on_other_file only to cops that refine them, and by skipping after_* dispatch when no cop needs it. (@​bbatsov)
• #15430: Improve performance of the per-file cop relevancy check by skipping gem requirement evaluation for cops without gem requirements. (@​bbatsov)
• #15430: Improve Lint/Debugger performance on code without debugger calls. (@​bbatsov)
• #15430: Improve autocorrection performance by keeping corrections in memory across inspection iterations and writing each corrected file only once. (@​bbatsov)
• #15415: Mark Lint/NumericOperationWithConstantResult autocorrect as unsafe because it drops the operands, discarding their side effects and silencing cases where the result is not actually constant (e.g. x / x raises when x is 0). (@​bbatsov)
• #15430: Improve performance of cops using AllowedPatterns, ForbiddenPatterns, and AllowedMethods by compiling the configured patterns only once. (@​bbatsov)
• #15430: Improve performance of Style/IfUnlessModifier and other modifier cops on files with many comments or conditionals. (@​bbatsov)

Sourced from rubocop's changelog.

1.88.2 (2026-07-08)

Bug fixes

• #15417: Fix a false negative for Lint/ToJSON, which did not flag singleton def self.to_json definitions. ([@​bbatsov][])
• #15418: Fix a false negative for Lint/UnreachableCode, which only flagged the first statement after a flow-of-control statement instead of every unreachable statement that followed it. ([@​bbatsov][])
• #15416: Fix a false negative for Lint/UselessNumericOperation, which only flagged bare method-call receivers and ignored local variables, instance/class/global variables, and constants (e.g. @x + 0, CONST * 1). ([@​bbatsov][])
• #15419: Fix a false negative for Lint/Void where safe-navigation calls to nonmutating methods (e.g. x&.sort) were not flagged when CheckForMethodsWithNoSideEffects is enabled. ([@​bbatsov][])
• #15421: Fix a false negative for Style/ArrayIntersect with the block form using include? (e.g. array1.any? { |e| array2.include?(e) }), which was only detected for member?. ([@​bbatsov][])
• #15420: Fix a false negative for Style/CollectionCompact, which did not flag grep_v(nil)/grep_v(NilClass) on a safe-navigation call (e.g. array&.grep_v(nil)). ([@​bbatsov][])
• #15422: Fix a false negative for Style/DefWithParentheses with a single-line definition whose body follows a semicolon (e.g. def foo(); end), where the parentheses can be safely omitted. ([@​bbatsov][])
• #15388: Fix a false negative for Style/MixinUsage when including multiple modules in one statement. ([@​bbatsov][])
• #15388: Fix a false negative for Style/ModuleFunction when the module body is a single statement. ([@​bbatsov][])
• #15388: Fix a false negative for Style/RedundantCurrentDirectoryInPath with double-quoted strings containing interpolation. ([@​bbatsov][])
• #15395: Fix a false negative for Style/RedundantHeredocDelimiterQuotes with double-quoted delimiters whose body contains interpolation or escapes. ([@​bbatsov][])
• #15409: Fix a false positive for Gemspec/DuplicatedAssignment with multiple specifications. ([@​bbatsov][])
• #15403: Fix a false positive for Layout/CommentIndentation with a comment above an inline access modifier (e.g. private def foo) when Layout/AccessModifierIndentation is configured with EnforcedStyle: outdent. ([@​grk][])
• #15372: Fix a false positive for Style/InvertibleUnlessCondition with a multi-statement begin condition. ([@​bbatsov][])
• #15360: Fix an incorrect autocorrect for Style/ArgumentsForwarding and Style/MethodDefParentheses when autocorrection conflicts while adding parentheses to method definition arguments. ([@​koic][])
• #15417: Fix an incorrect autocorrect for Lint/ToJSON that produced invalid Ruby (def to_json(*_args)()) when the method had explicit empty parentheses. ([@​bbatsov][])
• #15426: Fix an incorrect autocorrect for Style/MethodCallWithoutArgsParentheses when empty parentheses span multiple lines and the method call has a block. ([@​koic][])
• #15328: Fix a false positive for Style/HashConversion with a splat argument, which previously produced an invalid hash literal. ([@​bbatsov][])
• #15338: Fix a false positive for Style/HashLookupMethod with safe navigation, where the suggested bracket form would be the unreadable hash&.[](https://github.com/rubocop/rubocop/blob/master/key). ([@​bbatsov][])
• #15397: Fix an incorrect autocorrect for Style/IdenticalConditionalBranches that hoisted the moved expression to column zero instead of matching the surrounding indentation. ([@​bbatsov][])
• #15372: Fix an incorrect autocorrect for Style/InvertibleUnlessCondition with mixed &&/|| conditions, which lost the required parentheses when inverting. ([@​bbatsov][])
• #15428: Fix an incorrect autocorrect for Style/TrivialAccessors when AllowPredicates: false is set and a trivial reader is defined as a predicate class method. ([@​koic][])
• #15402: Fix an infinite loop and file corruption for Layout/LineLength with SplitStrings when an over-long string is indented under a multi-line parent. ([@​bbatsov][])
• #15384: Fix a false positive and a false negative for Style/MissingRespondToMissing when method_missing is defined at the top level or alongside sibling classes. ([@​bbatsov][])
• #15432: Fix false positives in Layout/ElseAlignment when using else within a block that is part of a larger expression. ([@​koic][])
• #15423: Fix false positives in Layout/MultilineMethodCallIndentation when a method chain is nested inside a parenthesized argument list or a grouped expression within a hash pair value. ([@​koic][])
• #15424: Fix Style/StructInheritance autocorrect dropping leading indentation when class is inside a module or namespace. ([@​amckinnie][])
• #15325: Fix Style/DocumentationMethod ignoring AllowedMethods for inline modifier defs. ([@​bbatsov][])
• #15369: Fix a false positive for Style/LambdaCall when the argument list contains a comment, which the autocorrect would have dropped. ([@​bbatsov][])

Changes

• #15430: Improve performance of offense reporting by not allocating a new source range per offense outside of embedded sources. ([@​bbatsov][])
• #15430: Improve investigation performance by dispatching on_new_investigation, on_investigation_end, and on_other_file only to cops that refine them, and by skipping after_* dispatch when no cop needs it. ([@​bbatsov][])
• #15430: Improve performance of the per-file cop relevancy check by skipping gem requirement evaluation for cops without gem requirements. ([@​bbatsov][])
• #15430: Improve Lint/Debugger performance on code without debugger calls. ([@​bbatsov][])
• #15430: Improve autocorrection performance by keeping corrections in memory across inspection iterations and writing each corrected file only once. ([@​bbatsov][])
• #15415: Mark Lint/NumericOperationWithConstantResult autocorrect as unsafe because it drops the operands, discarding their side effects and silencing cases where the result is not actually constant (e.g. x / x raises when x is 0). ([@​bbatsov][])
• #15430: Improve performance of cops using AllowedPatterns, ForbiddenPatterns, and AllowedMethods by compiling the configured patterns only once. ([@​bbatsov][])
• #15430: Improve performance of Style/IfUnlessModifier and other modifier cops on files with many comments or conditionals. ([@​bbatsov][])

• ceb6377 Cut 1.88.2
• ee87be8 Update Changelog
• e161fe6 Keep autocorrections in memory during the inspection loop
• c8e0c83 Speed up Style/IfUnlessModifier eligibility checks
• ef10f8a Dispatch investigation callbacks only to cops that refine them
• 4de41ea Avoid allocating a Range per offense in the common case
• be1bb58 Fast-path the gem requirements check in cop relevancy
• 278525b Memoize compiled regexps in pattern mixins
• 28b6cd6 Improve Lint/Debugger performance on non-debugger code
• 1066e7b Merge pull request #15434 from koic/fix_else_alignment_for_block_in_expression
• Additional commits viewable in compare view