HTMLSelectElement.item() does not behave according to specification

LayoutTests/fast/dom/script-tests/non-numeric-values-numeric-parameters.js

 description(
 'This tests the behavior of non-numeric values in contexts where the DOM has a numeric parameter.'
 );
 
 function nonNumericPolicy(template)
 {
     var x = 0;
     try {
         eval(template);
     } catch (e) {
@@ skipping 232 matching lines @@
 shouldBe("nonNumericPolicy('document.createElement(\"input\").setSelectionRange(0, x)')", "'any type allowed'");
 
 // HTMLOptionsCollection
 
 shouldBe("nonNumericPolicy('createHTMLOptionsCollection().add(document.createElement(\"option\"), x)')", "'any type allowed'");
 shouldBe("nonNumericPolicy('createHTMLOptionsCollection().remove(x)')", "'any type allowed'");
 
 // HTMLSelectElement
 
 shouldBe("nonNumericPolicy('createHTMLSelectElement().remove(x)')", "'any type allowed'");
-shouldBe("nonNumericPolicy('createHTMLSelectElement().item(x)')", "'any type allowed'");
+shouldBe("nonNumericPolicy('createHTMLSelectElement().item(x)')", "'any type allowed (but not omitted)'");
 
 // HTMLTableElement
 
 shouldBe("nonNumericPolicy('createHTMLTableElement().insertRow(x)')", "'any type allowed'");
 shouldBe("nonNumericPolicy('createHTMLTableElement().deleteRow(x)')", "'any type allowed'");
 
 // HTMLTableRowElement
 
 shouldBe("nonNumericPolicy('createHTMLTableRowElement().insertCell(x)')", "'any type allowed'");
 shouldBe("nonNumericPolicy('createHTMLTableRowElement().deleteCell(x)')", "'any type allowed'");
@@ skipping 376 matching lines @@
 ../../../../WebCore/svg/SVGSVGElement.idl:                 attribute float currentScale
 
 ../../../../WebCore/svg/SVGMatrix.idl:        attribute double a;
 ../../../../WebCore/svg/SVGMatrix.idl:        attribute double b;
 ../../../../WebCore/svg/SVGMatrix.idl:        attribute double c;
 ../../../../WebCore/svg/SVGMatrix.idl:        attribute double d;
 ../../../../WebCore/svg/SVGMatrix.idl:        attribute double e;
 ../../../../WebCore/svg/SVGMatrix.idl:        attribute double f;
 
 */