From f79f910c4df91ba54c483eaf02fdcaef81841a00 Mon Sep 17 00:00:00 2001
From: Steven Kirk <grokys@gmail.com>
Date: Thu, 17 Sep 2020 12:35:36 +0200
Subject: [PATCH] Coerce lower bound for deselecting items.

We can't deselect -1.
---
 src/Avalonia.Controls/Selection/SelectionModel.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Avalonia.Controls/Selection/SelectionModel.cs b/src/Avalonia.Controls/Selection/SelectionModel.cs
index 2492129780..3b5d57a7b8 100644
--- a/src/Avalonia.Controls/Selection/SelectionModel.cs
+++ b/src/Avalonia.Controls/Selection/SelectionModel.cs
@@ -242,7 +242,7 @@ namespace Avalonia.Controls.Selection
         {
             using var update = BatchUpdate();
             var o = update.Operation;
-            var range = new IndexRange(start, end);
+            var range = new IndexRange(Math.Max(0, start), end);
 
             if (RangesEnabled)
             {