552406 - Jquery-1.2.6.js:11 script is not responding and causes firefox to hang (not responding)

Status: RESOLVED DUPLICATE of bug 607856

(Core :: JavaScript Engine, defect)

Description

[Dominique]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.1; fr; rv:1.9.2) Gecko/20100115 Firefox/3.6 GTBDFff GTB7.0
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.1; fr; rv:1.9.2) Gecko/20100115 Firefox/3.6 GTBDFff GTB7.0

Nothing more to do than go on this website: www.comparance.com. There is a script (jquery-1.2.6.js:11) on the home page that causes Firefox to hang and not to respond anymore. It's not instantaneous, it does take a while to happen. Older versions of Firefox never caused that bug as I have been on this website many times before. Believe it or not ! but IE works perfect… It’s really related to this version of Firefox

It happens after a few minutes mostly when I come back and the screeensaver is on... 

Reproducible: Always

Steps to Reproduce:
1.Go a the web site 
2.Let the tab open and see what happens
3.Go out for lunch and get back later if needed
Actual Results:  
Just hangs and have to CTR-ALT-Delete to restart firefox

Comment 1

[Dominique]

The web site was www.comparance.com

Now I get another script error when I refresh the page :

Script: chrome://firebug/content/tabWatcher.js:517

Comment 2

[Dominique]

Now it bugs on GMAIL :

Script:https://mail.google.com/mail/?ui=2&name=js&ver=Y12kZ5.....

Comment 3

[Dominique]

Using IE now... Thanks for the prompt response

Comment 4

[Frédéric Buclin]

I can also reproduce this problem on this website, with Firefox 4.0b7 (but not with Fx 3.6.12):

  http://www.esep.ch/web/

When you click the "Documents à télécharger" link in the left menu (sometimes, you have to click on another link first to trigger the hang), you get a popup that Firefox hangs on:

Script : http://www.esep.ch/web/sites/default/files/js/js_f28f52e815bb8955477d3c15cc10bde9.js:13

which is the exact same file and line as the one reported in comment 0 (except that the one on esep.ch has an additional comment at line 1).

bz, could this be related to bug 614164?

Comment 5

[Frédéric Buclin]

Also, note that Opera and Chrome do not hang, and are fast to display the page.

Comment 6

[Boris Zbarsky [:bzbarsky]]

> bz, could this be related to bug 614164?

No.  That bug is about executing jquery stuff of various sorts that does run but runs about 2x slower than other browsers, not pathologically slower.

Comment 7

[Boris Zbarsky [:bzbarsky]]

For people who can reproduce this... does disabling methodjit make the problem go away?  What about disabling tracejit?

Comment 8

[Frédéric Buclin]

(In reply to comment #7)
> For people who can reproduce this... does disabling methodjit make the problem
> go away?  What about disabling tracejit?

Setting javascript.options.methodjit.content to false makes Fx4.0b7 hang on each page of the esep.ch website. Leaving it to true only makes the link mentioned in comment 4 hang Fx.

Setting javascript.options.tracejit.content to false fixes the hang.

Comment 9

[Nicholas Nethercote [inactive]]

This smells a lot like bug 607856, which wasn't fixed in time for beta 7.

Comment 10

[Nicholas Nethercote [inactive]]

(In reply to comment #9)
> This smells a lot like bug 607856, which wasn't fixed in time for beta 7.

Dominique, Frédéric, can you try again with a more recent nightly build of Firefox?  See http://nightly.mozilla.org/.

Comment 11

[Frédéric Buclin]

Hum, yes, I cannot reproduce the hang with Mozilla/5.0 (X11; Linux i686; rv:2.0b8pre) Gecko/20101124 Firefox/4.0b8pre

Comment 12

[Nicholas Nethercote [inactive]]

Thanks, Frédéric.  Please reopen if this comes back.

Comment 13

[Nicholas Nethercote [inactive]]

Sayre you just marked this as a blocker, but it's a dup of another blocker that's been fixed.  So I've removed the flag.

Comment 14

[Robert Sayre]

oh, that's intentional. if this bug were to be reopened, it would be a blocker.

but mostly these bugs are like trees falling in the forest with no one around. :)

Comment 15

[Nicholas Nethercote [inactive]]

(In reply to comment #14)
> oh, that's intentional. if this bug were to be reopened, it would be a blocker.

Oh.  Why would a dup be reopened?

Comment 16

[:Gavin Sharp [email: [e-mail]]]

Bugs can be duped incorrectly (e.g. root cause was assumed to be the same as the other bug, but is actually a different issue).