val dz = fn(x, y) {
    [x / y, true]
    catch {
        if _err'msg -> re/division by 0/ {
            [0, false]
        } else {
            # rethrow the error if not division by 0
            throw
        }
    }
}

writeln dz(3, 2)
writeln dz(3, 0)