Imported Upstream version 4.2.0.179

Former-commit-id: 4610231f55806d2a05ed69e5ff3faa7336cc1479

mcs/tests/test-async-78.cs

@@ -0,0 +1,54 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+
+public static class ExceptionHelper
+{
+	public static async Task ConditionalCatchExceptThreadAbortAsync (Func<Task>
+		funcTask, Action<Exception> conditionalCatchAction)
+	{
+		funcTask ();
+		return;
+	}
+}
+
+class ATask
+{
+	readonly object _asyncTaskCancellationSource = new object ();
+
+	readonly object aname;
+
+	public async Task<bool> OnDoWorkAsync ()
+	{
+		await ExceptionHelper.ConditionalCatchExceptThreadAbortAsync (
+			async () => {
+				if (_asyncTaskCancellationSource != null) {
+					string item = null;
+
+					await ExceptionHelper.ConditionalCatchExceptThreadAbortAsync (
+						async () => {
+							Console.WriteLine (aname);
+						},
+						(e) => {
+							Console.WriteLine (item);
+						}
+					);
+				}
+			},
+			null
+			);
+
+		return true;
+	}
+}
+
+public class Tests
+{
+	public static void Main ()
+	{
+		var a = new ATask ();
+		var res = a.OnDoWorkAsync ().Result;
+	}
+}