From 653dc83bd08819308e9a66bf3badeb9e4dc847e2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=BC=A0=E5=BC=98=E9=9F=AC?= <hongtao_zhang@outlook.com>
Date: Sun, 8 Aug 2021 13:45:18 +0800
Subject: [PATCH] fix error thrown in checking cache key when key is null

---
 Flow.Launcher.Infrastructure/Image/ImageCache.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Flow.Launcher.Infrastructure/Image/ImageCache.cs b/Flow.Launcher.Infrastructure/Image/ImageCache.cs
index 66104e806..4d11abe23 100644
--- a/Flow.Launcher.Infrastructure/Image/ImageCache.cs
+++ b/Flow.Launcher.Infrastructure/Image/ImageCache.cs
@@ -84,7 +84,7 @@ namespace Flow.Launcher.Infrastructure.Image
 
         public bool ContainsKey(string key)
         {
-            return Data.ContainsKey(key) && Data[key].imageSource != null;
+            return key is not null && Data.ContainsKey(key) && Data[key].imageSource != null;
         }
 
         public int CacheSize()