Imported Upstream version 3.8.0

Former-commit-id: 6a76a29bd07d86e57c6c8da45c65ed5447d38a61

mcs/tests/gtest-409.cs

@@ -1,7 +1,7 @@
 using System;
 
 //
-// Parser conditional and cast expression tests
+// parser conditional and cast expression tests
 //
 
 class A<T>
@@ -31,6 +31,18 @@ public class ConditionalParsing
 	struct S
 	{
 	}
+
+	struct MyTestStruct : IDisposable
+	{
+		public void Dispose ()
+		{
+		}
+
+		public static implicit operator MyTestStruct (int i)
+		{
+			return new MyTestStruct ();
+		}
+	}
 	
 	void Test_1 (bool a)
 	{
@@ -129,6 +141,15 @@ public class ConditionalParsing
 		bool? b = Test (1, arg:2);
 	}
 
+	void Test_17 ()
+	{
+		{
+			using (MyTestStruct? mts = (int?) 1)
+			{
+			}
+		}
+	}
+
 	static void Helper<T> (T arg)
 	{
 	}