Error trying to run Scala Application inside Eclipse

I'm using Eclipse Scala plugin. I created a simple program:

object HelloWorld {
  override def main(args: Array[String]) {
    prin开发者_如何学Gotln("Hello World!")
  }
}

I can run this program from the menu: Run As -> Scala Application

However, with this code

object HelloWorld extends Application {
  println("Hello world!")
}

I get this error message: "Selection does not contain a main type"

Does anyboby know how to solve this?

This is a known bug. In a version of scala plugin for eclipse that I use this bug is repeatable only for objects in default package.

By the way, the usage of Application trait is not recommended - see corresponding documentation for details.