enum with 1 member causing segfault

[andrewrk]

const Id = enum {
    Eof,
};

export fn entry() {
    bar(Id.Eof);
}
fn bar(id: Id) {
    while (true) {
        if (id == Id.Eof) {
            break;
        }
        @panic("hi");
    }
}

zig build-obj test.zig segfaults