Implement hoisting of anonymous methods with variables inside async body

1 files changed, 73 insertions, 0 deletions

diff --git a/mcs/tests/test-async-18.cs b/mcs/tests/test-async-18.cs
new file mode 100644
index 00000000000..898d9ed4ded
--- /dev/null
+++ b/mcs/tests/test-async-18.cs
@@ -0,0 +1,73 @@
+// Compiler options: -langversion:future
+using System;
+using System.Threading.Tasks;
+using System.Threading;
+
+class Tester
+{
+	async Task<int> Lambda_1 ()
+	{
+		int res = 1;
+		{
+			int a = 8;
+			Func<int> f = () => a;
+			res = await Task.Factory.StartNew (f);
+			res += f ();
+		}
+		
+		return res - 16;
+	}
+	
+	async Task<int> Lambda_2 ()
+	{
+		int res = 1;
+		{
+			int a = 8;
+			Func<int> f = () => a + res;
+			res = await Task.Factory.StartNew (f);
+			res += f ();
+		}
+		
+		return res - 26;
+	}
+	
+	async Task<int> Lambda_3<T> ()
+	{
+		int res = 1;
+		{
+			int a = 8;
+			Func<int> f = () => a;
+			res = await Task.Factory.StartNew (f);
+			res += f ();
+		}
+		
+		return res - 16;
+	}	
+
+	public static int Main ()
+	{
+		var t = new Tester ().Lambda_1 ();
+		if (!Task.WaitAll (new [] { t }, 1000))
+			return 1;
+		
+		if (t.Result != 0)
+			return 2;
+		
+		t = new Tester ().Lambda_2 ();
+		if (!Task.WaitAll (new [] { t }, 1000))
+			return 3;
+		
+		if (t.Result != 0)
+			return 4;
+
+		t = new Tester ().Lambda_3<ulong>();
+		if (!Task.WaitAll (new [] { t }, 1000))
+			return 5;
+		
+		if (t.Result != 0)
+			return 6;
+		
+		Console.WriteLine ("ok");
+		return 0;
+	}
+}