Please directly open a bug report at bugzilla.qooxdoo.org
Thanks.
Sebastian
Am 01.10.2007 um 13:43 schrieb [EMAIL PROTECTED]:
> Hi,
>
> I am debugging for quite a time now, and finally could identify the
> point where
> building the stacktrace (e.g. calling this.printStackTrace()) fails
> with quite a
> critical error "Permission denied to get property Function.caller"
> in Firefox
> with Firebug.
>
> The (simplified) scenario is as follows. I have an instance of a
> qooxdoo object,
> this one uses an XMLHttpRequest for AJAX. It registers a callback
> method though
> a dispatcher function so that the 'this' reference inside the
> callback points to
> the qooxdoo object. Inside callback, this.printStackTrace() is
> invoked - and fails!
>
> I used Firebird to step through the building of the stack trace. In
> "getStackTraceFromCaller" (StackTrace.js:135) the stack is build in
> a while loop
> (lines 148-165). With "fcn = fcn.caller;" (153) each caller is
> retrieved.
> However, at a step the internal event handler of Firebug for the
> XmlHttpRequest,
> named "handleEvent", is reached. Trying to access the "caller"
> property of this
> handler causes the permission exception.
>
> Paste the following lines into your Firebug console:
>
> var req = new XMLHttpRequest();
> req.onreadystatechange = function() {
> if (req.readyState == 4) {
> qx.dev.StackTrace.getStackTrace();
> }
> };
> req.open('GET', '/', true);
> req.send(null);
>
> A try-catch around the .caller access breaking the loop fixes it.
>
> Fabio
>
>
>
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