912655 - Can't open alert in load handler for a dialog (Cannot call openModalWindow on a hidden window)

Status: RESOLVED INVALID

(Core :: DOM: Navigation, defect)

Description

[Mike Kaply [:mkaply]]

I'm doing a very simple window.openDialog on a XUL window.

I get the error:

Cannot call openModalWindow on a hidden window

The dialog still displays, but because of the throw, window arguments are not passed properly to the onLoad.

Comment 1

[Mike Kaply [:mkaply]]

The actual call is:

  window.openDialog("chrome://unitedradio/content/radio/radio-window.xul", "unitedradio", "chrome,left=" + left + ",top=" + top, "Here");

And the XUL file is just a <dialog>

Comment 2

[Mike Kaply [:mkaply]]

Attachment: XPI to demonstrate problem

After installing this XPI, you'll need to go to the toolbar palette and drag the icon that says "DRAG ME TO THE TOOLBAR" to the toolbar.

On Firefox 23, clicking the button displays the dialog and says "Here" which is the dialog alerting window.arguments.

On Firefox 24, the error is shown in the console and the alert never displays (although the dialog comes up)

Comment 3

[Mike Kaply [:mkaply]]

This is worse than I thought. It doesn't load the JS file for the XUL at all.

Comment 4

[Mike Kaply [:mkaply]]

I have this completely wrong. Alerts in the onLoad of dialogs don't work anymore. That's quite annoying, but not major.

It mainly hurts debugging.

I'm guessing this is an OK behavior.