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Per-mutant timeout budget is parallelism-blind — full-core runs convert contention into spurious timeout verdicts

Status: Open.

#545 In boxed/mutmut;

· JonasPammerWork opened on Jul 31, 2026

run_stats records the teardown duration per test (missing call.when filter), starving the per-mutant timeout budget

Status: Open.

#544 In boxed/mutmut;

· JonasPammerWork opened on Jul 31, 2026

Exception: Could not find mutant for type error

Status: Open.

#541 In boxed/mutmut;

· nedbat opened on Jul 29, 2026

MutMut badge

Status: Open.

#536 In boxed/mutmut;

· cleder opened on Jul 9, 2026

(optionally) run the full test suite on any "surviving" mutants to confirm

Status: Open.

#535 In boxed/mutmut;

· ejfine opened on Jul 9, 2026

The pyrefly test fails

Status: Open.

#533 In boxed/mutmut;

· yurivict opened on Jun 28, 2026

Copy lockfile (uv.lock/poetry.lock/…) alongside pyproject.toml into the mutants tree

Status: Open.

#529 In boxed/mutmut;

· ejfine opened on Jun 12, 2026

mutate_only_covered_lines crashes on C-extension deps (numpy, libyaml): cannot load module more than once per process

Status: Open.

#528 In boxed/mutmut;

· ejfine opened on Jun 12, 2026

Support ty for filtering mutants

Status: Open.

#521 In boxed/mutmut;

· ejfine opened on Jun 4, 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