// This fixed a problem in the JIT.

public class Stack[T]
{
   mutable  data :  array [T];

  public this ()
  {
    data =  array(10);
  }

  public Add ( t : T) :  void
  {
    data [0] = t;
  }
}

struct Foo
{
   mutable  a : int;
}

class X
{
  static Main () :  void
  {
    mutable  foo =  Foo ();
    mutable  stack =  Stack ();
    stack.Add (foo);
  }
}
/*
BEGIN-OUTPUT
END-OUTPUT
*/