class Main {
	static function main() {
		trace("Hello, world!");
		// type:
		// foo(new A<select second completion item and press tab>)
	}

	static function foo(v:Any):Void {}
}

It will make new SigNum and import it, or any other random thing. It also shows bad documentation while completion list is updated.
Something is wrong with previousCompletionData in CompletionFeature.hx, setting it to null kinda fixes it, but removes documentation.