なぜか1度閉じてもう１度開くとクラッシュします。
コンソールにエラーは出ません
Thread 1: EXC_BAD_ACCESS (code=1, address=0x1)

exception break point 追加してますが表示されません

遷移元

import UIKit
class AbcViewController: UIViewController {

    @IBOutlet weak var scrollView: UIScrollView!
    // ScrollScreenの高さ
    var scrollScreenHeight:CGFloat!
    // ScrollScreenの幅
    var scrollScreenWidth:CGFloat!

    var screenSize:CGRect!

    override func viewDidLoad() {
        super.viewDidLoad()

        screenSize = UIScreen.main.bounds
        // ページスクロールとするためにページ幅を合わせる
        scrollScreenWidth = screenSize.width
        scrollScreenHeight = screenSize.height

        setupFirebase()
    }

    func setupFirebase() {

        // 自作セルをテーブルビューに登録する
        let communityXib = UINib(nibName: "CommunityTableViewCell", bundle: Bundle(for: type(of: self)))

        // 描画開始の x,y 位置
        let px:CGFloat = 0.0
        var py:CGFloat = 0.0

        let communityView = communityXib.instantiate(withOwner: self, options: nil).first as! UIView
        communityView.isUserInteractionEnabled = true
            print("あああ")
        let gesture = UITapGestureRecognizer(target: self, action: #selector(AbcViewController.btnClick(sender:forEvent:)))

        communityView.addGestureRecognizer(gesture)
        self.scrollView.addSubview(communityView)

        // 描画開始設定
        var viewFrame:CGRect = communityView.frame
        viewFrame.size.width = self.scrollScreenWidth
        viewFrame.size.height = self.scrollScreenHeight
        viewFrame.origin = CGPoint(x: px, y: py)
        communityView.frame = viewFrame
        // 次の描画位置設定
        py += (self.screenSize.height)

        // スクロール範囲の設定
        let nHeight:CGFloat = self.scrollScreenHeight * CGFloat(1)
        self.scrollView.contentSize = CGSize(width: self.scrollScreenWidth, height: nHeight)
    }

    @objc func btnClick(sender:UITapGestureRecognizer, forEvent event: UIEvent) {
        print("ムカつく")
        performSegue(withIdentifier: "toTest", sender: nil)
    }
}

遷移先

import UIKit

class DefViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
    }

    @IBAction func closePage(_ sender: Any) {
        self.dismiss(animated: true, completion: nil)
    }
}

Storyboard