Possible memory leak in e4x or HTTPService with e4x format

Question

Hello,
I think I have found a memory leak in e4x.
In very special cases (=xml) the player swallows the memory.
The little test program connects to a web server for an xml
file, and the result is converted to an array.
The array is displayed in a DataGrid.
There are two files:
leaktest.xml doesn't leak in any cases (format: e4x or xml)
pbentries.xml leaks when the format is e4x.
Choose e4x format and check Use "Leak" file! Than the program
leaks.
For the whole test case (mxml file, html file and xml files)
please contact me at
[email protected]
or
[email protected]
and I send a zip file as soon as possible.
Probably there is a bug in my test program. If so than please
send me a feedback.
Thanks,
Lacito
------ For the program cut here ------
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="
http://www.adobe.com/2006/mxml"
layout="absolute">
<mx:Script>
<![CDATA[
import mx.managers.PopUpManager;
import mx.core.Application;
import mx.controls.Alert;
import mx.rpc.events.FaultEvent;
import mx.rpc.events.ResultEvent;
import mx.rpc.http.mxml.HTTPService;
protected var records_:Array = null;
protected var httpService:HTTPService = null;
[Bindable("recordsChange")]
public function set records(_records:Array):void
this.records_ = _records;
var e:Event = new Event("recordsChange");
dispatchEvent(e);
public function get records():Array
return records_;
protected function getXML():void
var resultFormat:String = cbResultFormat.selectedItem as
String;
var params:Object = new Object();
httpService = new HTTPService();
httpService.concurrency = "single";
httpService.showBusyCursor = true;
var lastIndex:int = url.lastIndexOf("/");
var fileName:String = null;
if(chbUseLeakFile.selected)
// It leaks... :(
fileName = "pbentries.xml";
else
// It doesn't leak... :)
fileName = "leaktest.xml";
var _url:String = url.substr(0, lastIndex+1) + fileName;
httpService.url = _url;
httpService.resultFormat = resultFormat;
httpService.method = "POST";
httpService.addEventListener(ResultEvent.RESULT,
processResult);
httpService.addEventListener(FaultEvent.FAULT,
processFault);
httpService.send(params);
protected function processResult(e:ResultEvent):void
var resultFormat:String = cbResultFormat.selectedItem as
String;
removeListeners();
if(resultFormat==mx.rpc.http.HTTPService.RESULT_FORMAT_XML)
setArrayFromXMLNode();
else
setArrayFromXML();
destroyHttpService();
// format= "e4x"
protected function setArrayFromXML():void
var xml_:XML = httpService.lastResult as XML;
var ar:Array = new Array();
var x:XML = null;
var xl:XMLList = xml_.phonebookEntries[0].phonebookEntry;
for each(x in xl)
var record:Object = new Object();
var prop:XML = null;
var props:XMLList = x.children();
for each(prop in props)
record[prop.localName()] = prop.toString();
ar.push(record);
records = ar;
// format= "xml"
protected function setArrayFromXMLNode():void
var xml_:XMLNode = httpService.lastResult as XMLNode;
var ar:Array = new Array();
var x:XMLNode = null;
var xl:Array = xml_.lastChild.childNodes;
for each(x in xl)
var record:Object = new Object();
var prop:XMLNode = null;
var props:Array = x.childNodes;
for each(prop in props)
record[prop.localName] = prop.firstChild!=null ?
prop.firstChild.nodeValue : null;
ar.push(record);
records = ar;
protected function destroyHttpService():void
httpService.clearResult(false);
httpService.disconnect();
httpService = null;
protected function processFault(e:FaultEvent):void
removeListeners();
Alert.show(e.fault.faultString, e.fault.faultCode);
destroyHttpService();
protected function removeListeners():void
httpService.removeEventListener(ResultEvent.RESULT,
processResult);
httpService.removeEventListener(FaultEvent.FAULT,
processFault);
protected function collect():void
// Garbage Collection
try
new LocalConnection().connect('foo');
new LocalConnection().connect('foo');
catch(e:*)
]]>
</mx:Script>
<mx:ArrayCollection id="alRecords" source="{records}"
/>
<mx:Label x="10" y="10" text="Result format:"
id="lResultFormat"/>
<mx:ComboBox x="104" y="8" id="cbResultFormat">
<mx:Array>
<mx:String>e4x</mx:String>
<mx:String>xml</mx:String>
</mx:Array>
</mx:ComboBox>
<mx:DataGrid id="dgRecords" x="10" y="36" width="936"
height="437"
dataProvider="{alRecords}"
verticalScrollPolicy="auto"
horizontalScrollPolicy="auto">
</mx:DataGrid>
<mx:Button x="355" y="496" label="Get xml" id="btnGetXML"
click="{getXML();}" />
<mx:Button x="155" y="496" label="GC" id="btnGC"
click="{collect();}" />
<mx:CheckBox x="276" y="10" label="Use
&quot;LEAK&quot; file:" labelPlacement="left"
id="chbUseLeakFile" selected="true"/>
</mx:Application>

Answer 1

Hello,
After 3 months (and a new version of flex and flash player)
my test program is still leaking.
If somebody could confirm the leak it would be appreciated.
Thanks,
Lacito
P.S.: I heard that Adobe had donated ActionScript 3 VM to
Mozilla.org. Should I disturb them with my problem?