Compiling lambdas and invoking delegates on the device in Monotouch

I am currently porting a .NET codebase in MonoTouch and I'm currently working on a method that receives an Expression<T>. I'm trying to compile it, and then dynamically invoke it.

Here's what I did:

// Here's an example of what I could receive
Expression<Action<int>> expression = (a => Console.WriteLine (a * 2));

// And here's what I'm trying to do to invoke it
expression.Compile().DynamicInvoke(6);

This works fine in the iOS Simulator, the result "12" is printed in my console. But then I tried it on an iPad, and I received the following exception.

Object reference not set to an instance of an object
   at System.Linq.jvm.Runner.CreateDelegate ()
   at System.Linq.Expressions.LambdaExpression.Compile ()
   at System.Linq.Expressions.Expression`1[System.Action`1[System.Int32]].Compile ()
   at TestSolution2.AppDelegate.FinishedLaunching (MonoTouch.UIKit.UIApplication app, MonoTouch.Foundation.NSDictionary options)

What am I doing wrong and how could I make it work?