Another NullReferenceException with closure in constructor

[baSSiLL]

The issue is similar to #191. However, it reproduces with the latest sources. The difference is that an argument is also used in an expression for a local variable, and then both used in a lambda. Here is a test class:

    class A
    {
        public A(object o)
        {
            Contract.Requires(o != null);

            var local = o;
            Action a = () => ReferenceEquals(local, o);
        }
    }