From 91edffd8d20ce93239c33f592793d17643593ba1 Mon Sep 17 00:00:00 2001
From: Steven Kirk <grokys@gmail.com>
Date: Fri, 1 Dec 2017 18:59:12 +0100
Subject: [PATCH] Fixed #1297

Handle rounding errors when calculating increase button arrange rect.
---
 src/Avalonia.Controls/Primitives/Track.cs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/Avalonia.Controls/Primitives/Track.cs b/src/Avalonia.Controls/Primitives/Track.cs
index 8c577665d5..3a16e51851 100644
--- a/src/Avalonia.Controls/Primitives/Track.cs
+++ b/src/Avalonia.Controls/Primitives/Track.cs
@@ -154,7 +154,11 @@ namespace Avalonia.Controls.Primitives
 
                 if (increaseButton != null)
                 {
-                    increaseButton.Arrange(new Rect(firstWidth + thumbWidth, 0, remaining - firstWidth, finalSize.Height));
+                    increaseButton.Arrange(new Rect(
+                        firstWidth + thumbWidth,
+                        0,
+                        Math.Max(0, remaining - firstWidth),
+                        Math.Max(0, finalSize.Height)));
                 }
             }
             else