336915 - Crash when closing Firefox [@ CSSLoaderImpl::CheckLoadAllowed] with Leak Monitor and Nightly Tester Tools installed

Status: RESOLVED WORKSFORME

(Core :: CSS Parsing and Computation, defect)

Description

[Pavel Cvrcek [:JasnaPaka]]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9a1) Gecko/20060506 Minefield/3.0a1
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9a1) Gecko/20060506 Minefield/3.0a1

Firefox Trunk, clean profile

Reproducible: Always

Steps to Reproduce:
1. Open Firefox.
2. Visit some URL.
3. Close Firefox.

Actual Results:  
Firefox crashes.


Talkback's ids: TB18380407Z, TB18380364H, TB18379623M

Comment 1

[Adam Guthrie]

Incident ID: 18380364
Stack Signature	CSSLoaderImpl::CheckLoadAllowed 03caa73b
Product ID	FirefoxTrunk
Build ID	2006050604
Trigger Time	2006-05-06 14:44:16.0
Platform	Win32
Operating System	Windows NT 5.1 build 2600
Module	firefox.exe + (0017088e)
URL visited	
User Comments	
Since Last Crash	1770 sec
Total Uptime	15578 sec
Trigger Reason	Access violation
Source File, Line No.	c:\builds\tinderbox\fx-trunk-cairo\winnt_5.2_depend\mozilla\layout\style\nscssloader.cpp, line 887
Stack Trace 	
CSSLoaderImpl::CheckLoadAllowed   CSSLoaderImpl::LoadChildSheet   CSSParserImpl::ProcessImport   CSSParserImpl::ParseImportRule   nsHTMLDivElement::Clone   0x8d167457

Comment 2

[Daniel C]

TB18400952E, TB18400849Y, TB18400627Y

Comment 3

[Daniel C]

OK, I can't reproduce this after disabling the Leak Monitor extension. Is that the same for everyone else who can reproduce this bug?

dbaron, this doesn't occur for me if I disable your extension, but I still assume Gecko is doing something wrong, correct?

Comment 4

[Pavel Cvrcek [:JasnaPaka]]

(In reply to comment #3)
> OK, I can't reproduce this after disabling the Leak Monitor extension. Is that
> the same for everyone else who can reproduce this bug?

I can confirm this. After disabling the Leak Monitor extension all works fine.

Comment 5

[Boris Zbarsky [:bzbarsky]]

Hmm...  Do you have some other extension (like adblock) installed?

Comment 6

[Daniel C]

Actually, I should have tested more thouroughly. When the crash went away after disabling the Leak Monitor extension, I assumed that it was the trigger. However, creating a clean profile with that extension didn't show the crash.

For me at least, a clean profile, the Leak Monitor extension, and the Nightly Tester Tools extension are needed to reproduce.

A crash that is triggered by 2 extensions may seem an edge case, but both of these extensions are common in nightly build users now.

Can someone else confirm that a clean profile with these 2 extensions crashes on quit, but disabling one or the other makes the problem disappear?

Comment 7

[Boris Zbarsky [:bzbarsky]]

Links to those extensions?

Comment 8

[Pavel Cvrcek [:JasnaPaka]]

(In reply to comment #5)
> Hmm...  Do you have some other extension (like adblock) installed?

No. 

Firefox Trunk, clean profile + Leak Monitor extension + Nightly tools extension -> Firefox crashes after I close Firefox.

Firefox Trunk, clean profile + Leak Monitor extension -> no problem with stability.

Comment 9

[Ryan VanderMeulen [:RyanVM]]

*** Bug 337019 has been marked as a duplicate of this bug. ***

Comment 10

[Daniel C]

Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9a1) Gecko/20060507 Minefield/3.0a1

(In reply to comment #7)
> Links to those extensions?
> 

Leak Monitor 0.1.2, by L. David Baron, released on May 2, 2006 - https://addons.mozilla.org/firefox/2490/

Nightly Tester Tools 1.0.2, by Mossop, released on May 5, 2006 - https://addons.mozilla.org/firefox/958/

Those are the 2 extensions I used to reproduce this bug using the Minefield build stated at the top of this reply.

(In reply to comment #8)
> (In reply to comment #5)
> > Hmm...  Do you have some other extension (like adblock) installed?
> 
> No. 
> 
> Firefox Trunk, clean profile + Leak Monitor extension + Nightly tools extension
> -> Firefox crashes after I close Firefox.
> 
> Firefox Trunk, clean profile + Leak Monitor extension -> no problem with
> stability.
> 

Thanks Pavel.

Comment 11

[Boris Zbarsky [:bzbarsky]]

When I install Nightly Tester Tools and start up, I get a barrage of threadsafety assertions and JS stack dumps from XPConnect.  Then my build deadlocks.  This is all without any other extensions installed.  In particular, without Leak Monitor installed.

Whatever Nightly Tester Tools is doing here is NOT safe and WILL cause crashes, generally speaking.

Comment 12

[philippe (part-time)]

Attachment: Apple crash log

Fx crashes on quit with a clean profile + Leak Monitor extension 1.3, no other extensions or themes.

OS X 10.4, Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.9a1) Gecko/20060507 Minefield/3.0a1

Comment 13

[Dave Townsend [:mossop]]

(In reply to comment #11)
> Whatever Nightly Tester Tools is doing here is NOT safe and WILL cause crashes,
> generally speaking.
> 

That may be the case and I've contacted you directly regarding this. But I don't believe that it is the source of this bug. Fixing the leak from NTT does stop this crash from occurring. Additionally uninstalling NTT and installing another extension that leaks something in the main window means that the crash continues to happen.

Both of these were leaking through adding a preferences observer and never removing it.

Comment 14

[Dave Townsend [:mossop]]

Attachment: Extension that leaks and causes crash

This is a simple extension that leaks a preferences observer. With just this extension and the Leak Monitor installed Firefox will crash on exit.

Comment 15

[Daniel C]

(In reply to comment #14)
> Created an attachment (id=221284) [edit]
> Extension that leaks and causes crash
> 
> This is a simple extension that leaks a preferences observer. With just this
> extension and the Leak Monitor installed Firefox will crash on exit.
> 

I can confirm that this extension also causes a crash on shutdown with Leak Monitor installed.

Comment 16

[timeless]

bz: i'm hitting this for each update i've done i have domi, leak monitor and talkback.

Comment 17

[timeless]

once i disabled leak, i stopped crashing. but boy, what a waste of time. next time i'll just download my own current minefield instead of trying to use the app updater

Comment 18

[Boris Zbarsky [:bzbarsky]]

Dave, thanks for the test extension!

So the basic idea is that we're doing a load of leakmon.jar!/content/leakAlert.xul after the layout module has shut down.  So the security manager pointer in nsContentUtils is null, and the security check in nsCSSLoader crashes.

Perhaps leak monitor needs to observe quit-application or something like that and not trigger after that?

Comment 19

[David Baron :dbaron: (⌚️UTC-5, no longer working on Mozilla)]

I added the quit-application check in leak-monitor 0.2.0.  But it really seems like the code probably ought to have the necessary null checks for this; there are potentially other things that could just happen to happen at certain times, although maybe it's rarer happening after xpcom-shutdown.

Comment 20

[Yani (fr)]

I think you can close this bug.
Extension hasn't been updated for a while.