From 09f7dec79b2ab6b83065e79afa2e9e924a0d4fe2 Mon Sep 17 00:00:00 2001
From: Alexander Sloutsky <alexans@microsoft.com>
Date: Sat, 6 Jun 2020 13:49:20 +0300
Subject: [PATCH] Fix null-reference exception in TextAreaAutomationPeer - that
 was randomly occuring in the application.

---
 ICSharpCode.AvalonEdit/Editing/TextAreaAutomationPeer.cs | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/ICSharpCode.AvalonEdit/Editing/TextAreaAutomationPeer.cs b/ICSharpCode.AvalonEdit/Editing/TextAreaAutomationPeer.cs
index 1af35ac..f8d3878 100644
--- a/ICSharpCode.AvalonEdit/Editing/TextAreaAutomationPeer.cs
+++ b/ICSharpCode.AvalonEdit/Editing/TextAreaAutomationPeer.cs
@@ -114,8 +114,11 @@ namespace ICSharpCode.AvalonEdit.Editing
 				return this;
 			if (patternInterface == PatternInterface.Scroll) {
 				TextEditor editor = TextArea.GetService(typeof(TextEditor)) as TextEditor;
-				if (editor != null)
-					return FromElement(editor).GetPattern(patternInterface);
+				if (editor != null) {
+					var fromElement = FromElement(editor);
+					if (fromElement != null)
+						fromElement.GetPattern(patternInterface);
+				}
 			}
 			return base.GetPattern(patternInterface);
 		}