From cecc53a0e011fa20a1c67e6a2bd6ab098fb51c08 Mon Sep 17 00:00:00 2001
From: Robinhuett <5955614+Robinhuett@users.noreply.github.com>
Date: Sun, 5 Jan 2020 01:41:39 +0100
Subject: [PATCH] fix: app crashes when no windows are open

---
 alt-tab-macos/logic/TrackedWindows.swift | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/alt-tab-macos/logic/TrackedWindows.swift b/alt-tab-macos/logic/TrackedWindows.swift
index 212cf912..ac00634c 100644
--- a/alt-tab-macos/logic/TrackedWindows.swift
+++ b/alt-tab-macos/logic/TrackedWindows.swift
@@ -25,11 +25,13 @@ class TrackedWindows {
     }
 
     private class func isSingleSpace() {
-        let firstSpaceIndex = list[0].spaceIndex
-        for window in list {
-            if window.spaceIndex != nil && window.spaceIndex != firstSpaceIndex {
-                Spaces.singleSpace = false
-                return
+        if list.count > 0 {
+            let firstSpaceIndex = list[0].spaceIndex
+            for window in list {
+                if window.spaceIndex != nil && window.spaceIndex != firstSpaceIndex {
+                    Spaces.singleSpace = false
+                    return
+                }
             }
         }
         Spaces.singleSpace = true