Object closure allocation in AS3

gistfile1.txt

class Foo {
	function hatstand():void {}
	function lampshade():void {
		Tablecloth.onRemove(hatstand); // <- this allocates
	}
}

class Foo {
	var f:Function;
	function Foo() {
		f = hatstand; // <- this allocates
	}
	function hatstand():void {}
	function lampshade():void {
		Tablecloth.onRemove(f); // <- and this doesn't allocate
	}
}

class Foo {
	var f:Function;
	function Foo() {
		f = hatstand; // <- this allocates
	}
	function hatstand():void {}
	function lampshade():void {
		Tablecloth.onRemove(hatstand); // <- this doesn't allocate either, for some reason
	}
}