Issues

• |(a)| blocks fail the neutral check (unparser), and a possible |(a)| → |a| mutation

  mbj/mutant#1675 · Filter by author nialbima opened on Oct 18, 2026

• Feature request: Support ignore_patterns on children of nodes with variable elements

  mbj/mutant#1606 · Filter by author dgollahon opened on Apr 10, 2026

• Add back @foo -> foo when attr_reader :foo or attr_writer :foo is defined on the instance

  mbj/mutant#1592 · Filter by author dgollahon opened on Mar 18, 2026
  2

• feat: todo file

  incremental
  mbj/mutant#1435 · Filter by author devinburnette opened on Apr 3, 2024
  3

• Allow mutant:disable to apply to inline macros and visibility modifiers

  mbj/mutant#1399 · Filter by author dgollahon opened on Aug 3, 2023
  1

• Add mechanism to hooks to report "true" source location

  mbj/mutant#1397 · Filter by author dgollahon opened on Aug 3, 2023

• Failing subjects summary

  mbj/mutant#1393 · Filter by author dgollahon opened on Jul 14, 2023

• Add --debug-worker flag to make debugging workers easier

  enhancement
  mbj/mutant#1388 · Filter by author dgollahon opened on Jun 6, 2023
  2

• --since flag fails when git is configured with a different diff tool

  mbj/mutant#1387 · Filter by author appleton opened on May 22, 2023
  4

• SQL mutations

  mutation
  mbj/mutant#1360 · Filter by author swistak35 opened on Dec 15, 2022
  1

• Choose subjects based on an AST diff when using --since

  enhancement
  mbj/mutant#1337 · Filter by author dgollahon opened on Jun 17, 2022
  2

• Mutation idea: foo.all? { |bar| bar == baz } -> foo.all?(baz)

  mutation
  mbj/mutant#1336 · Filter by author dgollahon opened on Jun 14, 2022
  1

• Idea: neutral mutation only mode

  enhancement
  mbj/mutant#1334 · Filter by author dgollahon opened on May 26, 2022
  2

• Expand corpus tests

  enhancement
  mbj/mutant#1330 · Filter by author dgollahon opened on May 2, 2022

• Enhance corpus tests

  enhancement
  mbj/mutant#1329 · Filter by author dgollahon opened on May 2, 2022

• Improve error UX?

  mbj/mutant#1318 · Filter by author dgollahon opened on Apr 14, 2022
  1

• Skip mutation of else T.absurd

  mbj/mutant#1289 · Filter by author rodrigovilina opened on Dec 6, 2021
  1

• Mutate str.tr_s(pattern, '') → str.delete(pattern)

  enhancementmutation
  mbj/mutant#1286 · Filter by author backus opened on Nov 17, 2021
  

• Add numblock specific body mutations

  enhancementmutation
  mbj/mutant#1256 · Filter by author mbj opened on Aug 30, 2021

• Mutant failures caused by timeouts need to be more prominent

  enhancement
  mbj/mutant#1251 · Filter by author dkubb opened on Aug 27, 2021

• Add mutation from Array#one? to array.length.equal?(1).

  mutation
  mbj/mutant#1246 · Filter by author mbj opened on Jul 29, 2021
  

• Add mutation of #map to #to_set

  mutation
  mbj/mutant#1241 · Filter by author dkubb opened on Jul 21, 2021

• Fix crash on unexpected method-signature in rspec describe

  bug
  mbj/mutant#1239 · Filter by author mbj opened on Jun 11, 2021
  

• Add mutation to ensure stronger persistence method is used

  enhancementmutationrails
  mbj/mutant#1238 · Filter by author dkubb opened on Jun 11, 2021

• Fix crash on extracting subject associations on rspec tests without description

  mbj/mutant#1236 · Filter by author mbj opened on May 31, 2021