From f9a62ec3f333a72e5b73d6b1f3f8419be012be2f Mon Sep 17 00:00:00 2001
From: Shadowfacts <me@shadowfacts.net>
Date: Sat, 25 Jan 2020 22:03:21 -0500
Subject: [PATCH] Fix crash when tapping unloaded image attachment

---
 Tusker/TuskerNavigationDelegate.swift | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Tusker/TuskerNavigationDelegate.swift b/Tusker/TuskerNavigationDelegate.swift
index fe3671ff4c..04a0dc0271 100644
--- a/Tusker/TuskerNavigationDelegate.swift
+++ b/Tusker/TuskerNavigationDelegate.swift
@@ -148,7 +148,7 @@ extension TuskerNavigationDelegate where Self: UIViewController {
     }
     
     private func sourceViewInfo(_ sourceView: UIImageView?) -> LargeImageViewController.SourceInfo? {
-        guard let sourceView = sourceView else { return nil }
+        guard let sourceView = sourceView, let image = sourceView.image else { return nil }
         
         var sourceFrame = sourceView.convert(sourceView.bounds, to: view)
         if let scrollView = view as? UIScrollView {
@@ -159,7 +159,7 @@ extension TuskerNavigationDelegate where Self: UIViewController {
             let y = sourceFrame.minY * scale - scrollView.contentOffset.y + scrollView.frame.minY
             sourceFrame = CGRect(x: x, y: y, width: width, height: height)
         }
-        return (image: sourceView.image!, frame: sourceFrame, cornerRadius: sourceView.layer.cornerRadius)
+        return (image: image, frame: sourceFrame, cornerRadius: sourceView.layer.cornerRadius)
     }
     
     func largeImage(_ image: UIImage, description: String?, sourceView: UIImageView) -> LargeImageViewController {