From b3c64660535039dd324f9902c2828b0a52d4a2c5 Mon Sep 17 00:00:00 2001
From: Kevin Zhang <hongtao_zhang@outlook.com>
Date: Mon, 5 Jul 2021 11:48:30 +0800
Subject: [PATCH] Check null and return input value in UserSelectedRecord.cs to
 avoid error thrown.

---
 Flow.Launcher/Storage/UserSelectedRecord.cs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Flow.Launcher/Storage/UserSelectedRecord.cs b/Flow.Launcher/Storage/UserSelectedRecord.cs
index 8d8956cfa..23d8c4faf 100644
--- a/Flow.Launcher/Storage/UserSelectedRecord.cs
+++ b/Flow.Launcher/Storage/UserSelectedRecord.cs
@@ -28,6 +28,11 @@ namespace Flow.Launcher.Storage
 
         private static int GenerateStaticHashCode(string s, int start = HASH_INITIAL)
         {
+            if (s == null)
+            {
+                return start;
+            }
+
             unchecked
             {
                 // skip the empty space
@@ -101,4 +106,4 @@ namespace Flow.Launcher.Storage
             return selectedCount;
         }
     }
-}
+}
\ No newline at end of file