115835 - NPP_Destroy or NP_Shutdown cause crash if called after window closes

Status: VERIFIED DUPLICATE of bug 66748

(Core Graveyard :: Plug-ins, defect)

Description

[larry]

From Bugzilla Helper:
User-Agent: Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)
BuildID:    Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:0.9.4) 
Gecko/20011019 Netscape6/6.2 

We have a plugin that works fine in Netscape 4.x and we are trying
to make it work with Netscape 6.x.  When we close Netscape 6.x after viewing 
content with our plugin, we get an Access Violation error (only with Windows 
2000).  The problem seems to be that in Netscape 6, NPP_Destroy and 
NPP_Shutdown are called after the window is closed.
In Netscape 4, these two methods are called before the window is destroyed.  
I can still see Netscape on my task bar when the debugger stops in NPP_Destroy 
and NPP_Shutdown.  But with Netscape 6, when the debugger stops in NPP_Destroy, 
the window is already destroyed and Netscape is no longer present on my taskbar.
Some of the methods we call from NPP_Destroy need the HWND and the HDC. But 
they are no longer valid.


Reproducible: Always
Steps to Reproduce:
1. Install the AXEL plugin from www.mindavenue.com on a win 2000 PC
2. Look at any page with AXEL content, then exit Netscape 6.2.
3. Crash!

Actual Results:  Crash on exit

Expected Results:  Not crash.

Comment 1

[Matthias Versen [:Matti]]

Your server seems to be down for me.

And this is not a Netscape bug database...
Do you see this bug with a recent mozilla build ?
(Please try a nightly build if possible:
http://ftp.mozilla.org/pub/mozilla/nightly/latest-0.9.7/)

And please use a talkback enabled build and after you crashed and talkback
submitted the crash, run mozilla\bin\components\talkback.exe and add the
Talkback ID in this bug.

Thanks

Comment 2

[av (gone)]

Reporter, is there any difference when you exit through File/Quit and Close 
button in the windows top right corner?

Comment 3

[shrirang khanzode]

Larry, pls-pls confirm this problem with a 'most recent' build...

Comment 4

[larry]

I still get the crash with Mozilla 0.9.6+ (Windows; U; Windows NT 5.0; en-US; 
rv:0.9.6+) Gecko/20011211 BUT only on File->Exit, not when I use the window's 
close button.

Comment 5

[anthonyd]

i see this on the newest nightly build on win 2k.  I will try to get a stack 
trace up here or at least something more specific.

Also, I see this whether I use File->Exit or just the close window button, it 
doesnt matter.

anthonyd

Comment 6

[Peter Lubczynski]

Could be related or a dup of bug 66748.

Comment 7

[av (gone)]

I think this is it. Symptoms are very familiar. Resolving.

*** This bug has been marked as a duplicate of 66748 ***

Comment 8

[shrirang khanzode]

v