From ec443b811b8e1d86c6476317a2e8684fde8c60c8 Mon Sep 17 00:00:00 2001
From: Ari Vuollet <ari.vuollet@kapsi.fi>
Date: Sun, 22 May 2022 11:29:53 +0300
Subject: [PATCH] Fix error when double-clicking empty RichTextBox

---
 Source/Engine/UI/GUI/Common/RichTextBoxBase.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Source/Engine/UI/GUI/Common/RichTextBoxBase.cs b/Source/Engine/UI/GUI/Common/RichTextBoxBase.cs
index 96d055866..a3e05dc97 100644
--- a/Source/Engine/UI/GUI/Common/RichTextBoxBase.cs
+++ b/Source/Engine/UI/GUI/Common/RichTextBoxBase.cs
@@ -1,5 +1,6 @@
 // Copyright (c) 2012-2022 Wojciech Figat. All rights reserved.
 
+using System;
 using System.Collections.Generic;
 
 namespace FlaxEngine.GUI
@@ -211,7 +212,7 @@ namespace FlaxEngine.GUI
                 var hitPos = CharIndexAtPoint(ref location);
                 int spaceLoc = _text.LastIndexOfAny(Separators, hitPos - 2);
                 var left = spaceLoc == -1 ? 0 : spaceLoc + 1;
-                spaceLoc = _text.IndexOfAny(Separators, hitPos + 1);
+                spaceLoc = _text.IndexOfAny(Separators, Math.Min(hitPos + 1, _text.Length));
                 var right = spaceLoc == -1 ? textLength : spaceLoc;
                 SetSelection(left, right);
             }