In this case, it's difficult to quantify. The impact may be short-term, medium-term or long-term, but the academic literature clearly indicates that people who have less confidence in democratic institutions and who are more cynical are less likely to vote. Certainly, if a bill fuels this cynicism and decreases trust in politics and satisfaction with democracy, we can expect voter turnout to decline.
Would this be the case in the next federal election? Perhaps a little. We know that when people don't vote the first time, they tend to do it again. So there are medium- and long-term consequences too. It's extremely difficult to quantify, but the academic literature clearly indicates that there's a negative relationship here.