The below code makes ccrewrite blow up! Ideas? BTW, If you comment out the ActualClass, ccrewrite succeeds...

    [ContractClass(typeof(TestContracts))]
    interface ITestInterface
    {
        bool IsStarted { get; set; }
        void Begin();
    }

    class ActualClass : ITestInterface
    {
        public bool IsStarted { get; set; }
        public void Begin()
        {
            this.IsStarted = true;
        }
    }

    [ContractClassFor(typeof(ITestInterface))]
    class TestContracts : ITestInterface
    {
        ITestInterface Current { get; set; }

        private TestContracts()
        {
            Current = this;
        }

        #region ITestInterface Members

        bool ITestInterface.IsStarted
        {
            get; set;
        }

        void ITestInterface.Begin()
        {
            Contract.Requires(!Current.IsStarted);
            Contract.Ensures(Current.IsStarted);
        }

Thanks in advance!