Why do you use force unwrap? Don't you know it's a bad practice?

[MadGeorge]

[scenee]

Of course, I know. But there is nothing I can do to escape that fpc.transitionAnimator is implicitly unwrapped optional because it's easy to lead a mistake in the core logic and make the core logic simple. In addition, it's not possible fpc. transitionAnimator is nil in most cases.

I assume this crash happens when fpc.state is not .hidden before calling fpc.show(animated: true). It was not expected to present a panel from any state except for .hidden. Thanks to your report, I could know it happened on an occasion.

I wrote a patch to prevent a crash for that case in prevent-force-unwrapping-crash branch. It ensures that the initial state is hidden before presenting a panel. So I hope would you try it and give me a feedback.