Imported Upstream version 5.4.0.167

Former-commit-id: 5624ac747d633e885131e8349322922b6a59baaa

mcs/tests/test-throw-expr-02.cs

@@ -0,0 +1,22 @@
+using System;
+
+class Program
+{
+    public static int Main ()
+    {
+        Console.WriteLine (M (1));
+        try {
+            Console.WriteLine (M (null));
+        } catch (Exception) {
+            Console.WriteLine ("thrown");
+            return 0;
+        }
+
+        return 1;
+    }
+
+    static string M (object data)
+    {
+        return data?.ToString () ?? throw null;
+    }
+}