Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/errors/cs1997.cs

@@ -0,0 +1,19 @@
+// CS1997: `C.Test()': A return keyword must not be followed by an expression when async method returns `Task'. Consider using `Task<T>' return type
+// Line: 12
+
+using System;
+using System.Threading.Tasks;
+
+class C
+{
+	public async Task Test ()
+	{
+		await Call ();
+		return null;
+	}
+	
+	static Task Call ()
+	{
+		return null;
+	}
+}