237396 - The javascript works, but "Permission denied to get property XULElement.selectedIndex" appears in js console

Status: VERIFIED DUPLICATE of bug 236791

(Firefox :: Address Bar, defect)

Description

[Zach]

User-Agent:       Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET CLR 1.0.3705; .NET CLR 1.1.4322)
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.6) Gecko/20040206 Firefox/0.8

I have only seen this on the Firefox build, and not Mozilla 1.6.  I'll set up 
the senario...I have a form with an onsubmit='return(CanSubmit())';  That way 
I can cancel the submission of the form if my data validation fails.  Well it 
turns out that if you have an alert or a confirm in the onsubmit function and 
it fires, and then the onsubmit function returns false, it produces the 
following javascript error in the console window:
Error: [Exception... "'Permission denied to get property 
XULElement.selectedIndex' when calling method: 
[nsIAutoCompletePopup::selectedIndex]"  nsresult: "0x8057001e 
(NS_ERROR_XPC_JS_THREW_STRING)"  location: "JS frame :: 
https://localhost/employer/shift.php?
func=edit&id=16&startI=1079155800&endI=1079188200 :: CanSubmit :: line 428"  
data: no]
Source File: https://localhost/employer/shift.php?
func=edit&id=16&startI=1079155800&endI=1079188200
Line: 428

Reproducible: Always
Steps to Reproduce:
1.described above
2.
3.

Actual Results:  
I get the error in the console window when I discover I have invalid data , 
pop up the alert, and cancel the submission.

Expected Results:  
Not given me the error.  It doesn't in Mozilla 1.6

Comment 1

[Boris Zbarsky [:bzbarsky]]

> I have only seen this on the Firefox build, and not Mozilla 1.6

And that's why you filed it on Mozilla?  ;)

Comment 2

[Jesse Ruderman]

-> autocomplete

Comment 3

[Jesse Ruderman]

Related: bug 236791

Comment 4

[Robin Monks]

Bug 236791 is quite similar to this and has quite a bit of info.

*** This bug has been marked as a duplicate of 236791 ***

Comment 5

[Henrik Skupin [:whimboo][⌚️UTC+1]]

v.