Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/gtest-452.cs

@@ -0,0 +1,27 @@
+using System;
+
+public class Test
+{
+	public static int Main ()
+	{
+		S mc = new S ();
+		float? f = mc;
+		if (f != 5)
+			return 1;
+		
+		return 0;
+	}
+}
+
+struct S
+{
+	public static implicit operator float (S p1)
+	{
+		throw new ApplicationException ("should not be called");
+	}
+	
+	public static implicit operator float? (S p1)
+	{
+		return 5;
+	}
+}