Tmux 3 raises "invalid option" on an invalid option

[edouardklein]

Hi,

The following test:

def test_show_option_unknown(session):
    """Session.show_option raises UnknownOption for invalid option."""
    with pytest.raises(exc.UnknownOption):
        session.show_option('moooz')

in tests/test_session.py

fails because my version of tmux (3.1b) prints "invalid option: moooz" when given an invalid option.

I have no easy way to test whether tmux 2's behaviour was to throw an "unknown option" instead.

I don't know how you want to fix this. Shall we throw a UnknownOption to maintain backwards compatibility (is any one try...excepting for this specifically anyway ?) Shall we remove this test now that tmux has changed its ways ?