LambdaExpression.CompileToMethod not working with System.Type?

Question

I am trying to make a programming language. The problem occurs when trying compile lambda into a module, more precisely when trying to convert from string to t(some type) using Convert.ChangeType instead of t.Parse. If I use LambdaExpression.Compile and using DynamicInvoke on the delegate it works, but if I use CompileToMethod and generate a module(abc.exe) and convert using Convert.ChangeType it throws an exception when I run the module: System.TypeAccessException was unhandled Message=Attempt by method 'Foo.Main()' to access type 'System.RuntimeType' failed.

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Method used to convert:

        private static Expression ConvertExpression<T>(Expression exprToConvert)
    {
        Type[] types = new Type[] { typeof(object), typeof(Type) };
        MethodInfo changeTypeMethod = typeof(System.Convert).GetMethod("ChangeType", types);
        Expression convertedExprAsObject = Expression.Call(changeTypeMethod, exprToConvert, Expression.Constant(typeof(T)));      
        return Expression.Convert(convertedExprAsObject, typeof(T));
    }

Answer 1

I was able to reproduce the exception you got (that was the hardest part :-)). Then I was able to see if changing the following code made a difference:

 Expression.Constant(typeof(T))

to:

 Expression.Constant(typeof(T), typeof(Type))

With just that one small change it all seemed to work correctly. Creating the Constant as being of type Type makes everything happy.