Fixed crash when undo is called on a TextBox with no changes.

10 years ago · b4a0317604
1 changed files with 1 additions and 1 deletions
--- a/src/Avalonia.Controls/Utils/UndoRedoHelper.cs
+++ b/src/Avalonia.Controls/Utils/UndoRedoHelper.cs
@ -37,7 +37,7 @@ namespace Avalonia.Controls.Utils

        public void Undo()
        {
-			if (_currentNode != null)  
+			if (_currentNode?.Previous != null)  
 			{
 				_currentNode = _currentNode.Previous;
 			}