1 files changed, 67 insertions, 0 deletions
diff --git a/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Bugzilla31145.cs b/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Bugzilla31145.cs
new file mode 100644
index 00000000..9e1d7916
--- /dev/null
+++ b/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Bugzilla31145.cs
@@ -0,0 +1,67 @@
+using System;
+using System.Threading.Tasks;
+using Xamarin.Forms.CustomAttributes;
+
+namespace Xamarin.Forms.Controls
+{
+	[Preserve(AllMembers = true)]
+	[Issue(IssueTracker.Bugzilla, 31145, "Picker cause memory leak holding entire Page in memory after it popped (WP8 SL only)", PlatformAffected.WinPhone)]
+	public class Bugzilla31145 : TestContentPage 
+	{
+		WeakReference _page2Tracker;
+		Label _resultLabel;
+
+		protected override void Init()
+		{
+			var instructions = new Label () { Text = "The counter below should say 'Page2 IsAlive = false' after a short period of time. If the counter does not say that within 5 seconds, this test has failed." };
+			_resultLabel = new Label ();
+			Content = new StackLayout { Children = { instructions, _resultLabel } };
+		}
+
+		protected override async void OnAppearing()
+		{
+			base.OnAppearing();
+
+			if (_page2Tracker == null)
+			{
+				var page2 = new Bugzilla31145Page2();
+
+				_page2Tracker = new WeakReference(page2, false);
+
+				await Task.Yield();
+				await Navigation.PushModalAsync(page2);
+
+				StartTrackPage2();
+			}
+		}
+
+		async void StartTrackPage2()
+		{
+			var n = 0;
+			while (_page2Tracker.IsAlive)
+			{
+				_resultLabel.Text = $"Page2 IsAlive = {_page2Tracker.IsAlive} ({n++})";
+                await Task.Delay(1000);
+				GC.Collect();
+			}
+
+			_resultLabel.Text = $"Page2 IsAlive = {_page2Tracker.IsAlive}";
+		}
+	}
+
+	public class Bugzilla31145Page2 : ContentPage
+	{
+		public Bugzilla31145Page2()
+		{
+			Content = new Picker();
+		}
+
+		protected override async void OnAppearing()
+		{
+			base.OnAppearing();
+
+			await Task.Yield();
+			await Navigation.PopModalAsync();
+		}
+	}
+}
+\ No newline at end of file