This might require a version bump (latest version in tree is 0.7.8, upstream is at 0.11.1 which is actively tested against Python 3.9). Reproducible: Always
fwiw unittest pass with in-tree 0.7.8 ---------------------------------------------------------------------- Ran 624 tests in 26.840s OK (skipped=60) * python3_9: running distutils-r1_run_phase _distutils-r1_clean_egg_info >>> Completed testing dev-python/lark-parser-0.7.8 Not that the ebuild is setup to run them bug #703692
All versions in tree support py3.9 and py3.10