Bug 523899

User-Agent:       Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.1.1) Gecko/20090715 Firefox/3.5.1

using System;
using System.Collections.Generic;
 
namespace Test
{
   public enum Enum
   {
      One,
      Two
   }
 
   class CompilerTest
   {
 
      public static void Main(string[] s) {
         ThisDoesNotWork();
      }
 
      protected static int DoSomething<T>(string s, T t, ref T t2)
      {
         Console.WriteLine("s={0}", s);
         Console.WriteLine("t={0}", t.ToString());
         Console.WriteLine("t2={0}", t2.ToString());
 
         t2 = default(T);
 
         return 0;
      }
 
      // .NET 3.5 infers Enum? from T, Mono is confused
      public static void ThisDoesNotWork()
      {
         // Nullable does not work
         Enum? e = Enum.One;
         DoSomething("abc", Enum.Two, ref e);
      }
 
      public static void ThisWorksFine()
      {
         Enum e = Enum.Two;
         DoSomething("abc", Enum.Two, ref e);
         Console.WriteLine("e={0}", e.ToString());
      }
   }
}

Reproducible: Always

Steps to Reproduce:
1. Try to compile the above code with gmcs (r138189)

Actual Results:  
CompilerTest2.cs(35,10): error CS0411: The type arguments for method `Test.CompilerTest.DoSomething<T>(string, T, ref T)' cannot be inferred from the usage. Try specifying the type arguments explicitly


Expected Results:  
Should compile.

This can be worked around by explictly specifying <Enum?> as the type.