290336 - removeEventListener clobbering the wrong handler

Status: RESOLVED DUPLICATE of bug 174320

(Firefox :: General, defect)

Description

[Ramon Leon]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.6) Gecko/20050317 Firefox/1.0.2
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.6) Gecko/20050317 Firefox/1.0.2

If you remove an event handler, during the execution of the event during which
it was scheduled to fire, but after it's already fired, then the next handler
scheduled gets clobbered by removeEventListener.  This is a simplified example,
but when doing cross window scripting, there are valid reasons you want to do
this, else on window will hold references to dom objects that no longer exist in
another window when has navigated elsewhere.

Reproducible: Always

Steps to Reproduce:
var firstEvent = function(){
    alert('firstEvent');
}
var secondEvent = function(){
    alert('secondEvent');
}
var thirdEvent = function(){
    alert('thirdEvent');
}
var unloadfirstEvent = function(){
    alert('unhook firstEvent');
    window.removeEventListener("unload", firstEvent, false);
}
//should fire
window.addEventListener("unload", firstEvent, false);
//should fire
window.addEventListener("unload", unloadfirstEvent, false);
//should fire but doesn't, line above killed it
window.addEventListener("unload", secondEvent, false);
//should fire
window.addEventListener("unload", thirdEvent, false);

Actual Results:  
removeEventListener kills the wrong handler, and the secondEvent doesn't fire

Expected Results:  
the secondEvent should fire, it was never removed.

IE handles this perfectly, about the only thing I've seen yet that it does
better than firefox.  This bug also happens in mozilla.  Seems to be a bug in
the Gecko DOM.

Comment 1

[Nickolay_Ponomarev]

*** This bug has been marked as a duplicate of 174320 ***