From 327fa3c5e46af79802faacec48e17d38d7f1f75e Mon Sep 17 00:00:00 2001
From: Stuart Lang <stuart.b.lang@gmail.com>
Date: Sun, 29 Sep 2019 22:01:37 +0100
Subject: [PATCH] Handle case where GetRenderer retuns null (#7566)  Fixes
 #7563

---
 .../Issue7563.cs                                   | 36 ++++++++++++++++++++++
 .../Xamarin.Forms.Controls.Issues.Shared.projitems |  1 +
 .../Renderers/PageRenderer.cs                      |  2 +-
 3 files changed, 38 insertions(+), 1 deletion(-)
 create mode 100644 Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue7563.cs

diff --git a/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue7563.cs b/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue7563.cs
new file mode 100644
index 0000000..ac86cbe
--- /dev/null
+++ b/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue7563.cs
@@ -0,0 +1,36 @@
+using System.Threading;
+using Xamarin.Forms.CustomAttributes;
+using Xamarin.Forms.Internals;
+
+#if UITEST
+using Xamarin.Forms.Core.UITests;
+using Xamarin.UITest;
+using NUnit.Framework;
+#endif
+
+namespace Xamarin.Forms.Controls.Issues
+{
+#if UITEST
+	[Category(UITestCategories.ManualReview)]
+#endif
+	[Preserve(AllMembers = true)]
+	[Issue(IssueTracker.Github, 7563, "iOS Layout Compression should not crash when VoiceOver is active", PlatformAffected.iOS)]
+	public class Issue7563 : TestContentPage
+	{
+		protected override void Init()
+		{
+
+			var stack = new StackLayout
+			{
+				AutomationId = "test",
+				Children = { new Label { Text = "Turn on the Screen Reader. If you do not hear 'I am the StackLayout', this test has failed." } },
+			};
+			
+			Xamarin.Forms.CompressedLayout.SetIsHeadless(stack, true);
+			
+			AutomationProperties.SetIsInAccessibleTree(stack, true);
+			AutomationProperties.SetName(stack, "I am the StackLayout. This should be announced.");
+			Content = stack;
+		}
+	}
+}
\ No newline at end of file
diff --git a/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Xamarin.Forms.Controls.Issues.Shared.projitems b/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Xamarin.Forms.Controls.Issues.Shared.projitems
index 369f053..10e942e 100644
--- a/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Xamarin.Forms.Controls.Issues.Shared.projitems
+++ b/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Xamarin.Forms.Controls.Issues.Shared.projitems
@@ -1026,6 +1026,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)Issue6929.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Controls\ApiLabel.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Issue7582.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Issue7563.cs" />
   </ItemGroup>
   <ItemGroup>
     <EmbeddedResource Include="$(MSBuildThisFileDirectory)Bugzilla22229.xaml">
diff --git a/Xamarin.Forms.Platform.iOS/Renderers/PageRenderer.cs b/Xamarin.Forms.Platform.iOS/Renderers/PageRenderer.cs
index ea9b1b7..41b3216 100644
--- a/Xamarin.Forms.Platform.iOS/Renderers/PageRenderer.cs
+++ b/Xamarin.Forms.Platform.iOS/Renderers/PageRenderer.cs
@@ -72,7 +72,7 @@ namespace Xamarin.Forms.Platform.iOS
 						!(
 							child is VisualElement ve && ve.IsTabStop
 							&& AutomationProperties.GetIsInAccessibleTree(ve) != false // accessible == true
-							&& ve.GetRenderer().NativeView is UIView view)
+							&& ve.GetRenderer()?.NativeView is UIView view)
 						 )
 						continue;
 
-- 
2.7.4