From ae8da1683433ad5ec6a08e892ee02006044bfbd4 Mon Sep 17 00:00:00 2001
From: Kang Yu <kangyu.ca@gmail.com>
Date: Thu, 8 May 2025 13:43:36 -0700
Subject: [PATCH] #403, fix crash due to empty history record

---
 .../Common/PersistentWindowProcessor.cs                       | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Ninjacrab.PersistentWindows.Solution/Common/PersistentWindowProcessor.cs b/Ninjacrab.PersistentWindows.Solution/Common/PersistentWindowProcessor.cs
index 7ebe6cf..fbafe35 100644
--- a/Ninjacrab.PersistentWindows.Solution/Common/PersistentWindowProcessor.cs
+++ b/Ninjacrab.PersistentWindows.Solution/Common/PersistentWindowProcessor.cs
@@ -1503,7 +1503,9 @@ namespace PersistentWindows.Common
                 lock(captureLock)
                 foreach (var kid in deadAppPos.Keys)
                 {
-                    var appPos = deadAppPos[kid].Last<ApplicationDisplayMetrics>();
+                    var appPos = deadAppPos[kid].LastOrDefault<ApplicationDisplayMetrics>();
+                    if (appPos == null)
+                        continue;
 
                     if (!procName.Equals(appPos.ProcessName))
                         continue;