Lifestyle mismatch diagnostic warning not thrown when applying multiple decorators

[dotnetjunkie]

Using the following definitions:

interface IHandler<T> { }
class IntHandler : IHandler<int> { }
class Decorator<T> : IHandler<T> {
    public Decorator(IHandler<T> decoratee) { }
}

The following code throws an 'lifestyle mismatch' exception:

var container = new Container();

container.Register(typeof(IHandler<int>), typeof(IntHandler), Lifestyle.Transient);
container.RegisterDecorator(typeof(IHandler<>), typeof(Decorator<>), Lifestyle.Singleton);

container.Verify();

And so does this code:

var container = new Container();

container.Register(typeof(IHandler<int>), typeof(IntHandler), Lifestyle.Transient);
container.RegisterDecorator(typeof(IHandler<>), typeof(Decorator<>), Lifestyle.Singleton);
container.RegisterDecorator(typeof(IHandler<>), typeof(Decorator<>), Lifestyle.Singleton);

container.Verify();

But the following code does not throw an exception:

var container = new Container();

container.Register(typeof(IHandler<int>), typeof(IntHandler), Lifestyle.Transient);
container.RegisterDecorator(typeof(IHandler<>), typeof(Decorator<>), Lifestyle.Singleton);
container.RegisterDecorator(typeof(IHandler<>), typeof(Decorator<>), Lifestyle.Singleton);
container.RegisterDecorator(typeof(IHandler<>), typeof(Decorator<>), Lifestyle.Singleton);

container.Verify();

When more than two decorators are wrapped around a type, everything deeper than the second decorator doesn't get validated anymore.