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type_check_command: "Could not find mutant for type error" crash when the pyrefly reports an error outside any mutant's line range

Status: Open.

#522 In boxed/mutmut;

· ejfine opened on Jun 4, 2026

Support ty for filtering mutants

Status: Open.

#521 In boxed/mutmut;

· ejfine opened on Jun 4, 2026

The 3.5.0 tag is missing

Status: Open.

#520 In boxed/mutmut;

· yurivict opened on May 26, 2026

timeout_checker uses outer-loop mutant_name for the est-lookup, causing spurious 15s timeouts for unrelated mutants when any "no tests" mutant exists

Status: Open.

#518 In boxed/mutmut;

· aastein opened on May 13, 2026

Trampoline misses mutants when tests use patch.dict(os.environ, ..., clear=True)

Status: Open.

#511 In boxed/mutmut;

· tomrussobuilds opened on Apr 27, 2026

Multi-page documentation

documentation

Status: Open.

#507 In boxed/mutmut;

· Otto-AA opened on Apr 25, 2026

Using mutmut with Django: a working recipe (conftest + pyproject) — also closes the gap in #456

Status: Open.

#504 In boxed/mutmut;

· willianantunes opened on Apr 20, 2026

no example standard run Django tests with TestCase

Status: Open.

#503 In boxed/mutmut;

· ArtemIsmagilov opened on Apr 20, 2026

Race in inner_timout_checker: iterating over m.start_time_by_pid.items() can crash with "dictionary changed size during iteration" and leave mutmut run hanging

Status: Open.

#490 In boxed/mutmut;

· pomponchik opened on Apr 3, 2026

mutmut v3 copies source to temp dir, breaking editable-install imports

Status: Open.

#486 In boxed/mutmut;

· dirkenglund opened on Mar 29, 2026

mutmut run bombs out during initial test run

Status: Open.

#485 In boxed/mutmut;

· liquidpele opened on Mar 29, 2026

@dataclass methods produce zero mutants

Status: Open.

#480 In boxed/mutmut;

· tomwillis608 opened on Mar 14, 2026