Failure to throw NullPointerException in -Xcomp

class t104
{
    public static void main(String[] argv)
    {
	t104 o = null;
	try
	{
	    synchronized(o)
	    {
		System.out.println("Fubar: monitorenter didn't throw.");
	    }
	    System.out.println("Bottom of try block.");
	}
	catch(Throwable t)
	{
	    System.out.println("Exception thrown.");
	    System.out.println(t.toString());
	}
    }
}