Comparison of by-ref single-variant nullary tag does not work

[brson]

tag chan {
    chan_t;
}

fn wrapper3(i: chan) {
    log_err i;
    assert i == chan_t;
}

fn main() {
    wrapper3(chan_t);
}

log displays a number that looks like garbage and the assert fails. Possibly the same issue as #1034

[brson]

Actually, I don't know whether i is passed by-ref, but I remember when I changed the passing convention it worked.