110193 - spastic wheeling crashes browser

Status: RESOLVED DUPLICATE of bug 110145

(Core :: DOM: UI Events & Focus Handling, defect)

Description

[David Einstein]

From Bugzilla Helper:
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:0.9.5+)
Gecko/20011112
BuildID:    2001111408

On a page with no scrollbar (may not matter) moving the mouse pointer off
of the page while spinnig the mousewheel crashes the browser  

Reproducible: Sometimes
Steps to Reproduce:
1.Load a page with no scrollbar
2.While spinning the mouse wheel fling the mouse off the left side of the screen.
3. fill out talkback report

Actual Results:  It crashed. TB38028855Q (linux)  It also happens on my cvs
built w2k machine.

Expected Results:  nothing

As you can probably tell from the stacktrace aTargetFrame has no content.
It took me three tries to reproduce.

Comment 1

[David Einstein]

TB38030635X (Win2k)
This seems to have a slightly different stack trace than most of the other mouse
wheel crashes.

Comment 2

[David Einstein]

Attachment: Stacktrace

This does not seem to match any of the other stack traces for wheel crashes.
I believe that a simple

if (!targetContent) return NS_OK;

Would suffice.

Comment 3

[David Einstein]

Attachment: Micro patch

This appears to work on my machine

Comment 4

[Madhur Bhatia]

I was able to reproduce the crash on win2000 build ID : 2001-11-14-10trunk.

1. open the browser 
2. go to a site with no scrollbar (http://www.hotmail.com)
3. use the mouse wheel
-crash 

Note:-
If I first go to a site with a scroll bar (say - http://www.netscape.com), use 
the mouse wheel to scroll up/down - then go to a site with no scroll bar - the 
crash does not happen.

Comment 5

[Madhur Bhatia]

 Incident ID                38058588
 Stack Signature            nsEventStateManager::DoWheelScroll 3cb620f0
 Bug ID
 Trigger Time               2001-11-15 10:51:07
 Email Address              [e-mail]
 URL visited                http://www.hotmail.com
 User Comments              trying to reproduce bug 110193 
 Build ID                   2001111410
 Product ID                 MozillaTrunk
 Platform
 Operating System           Win32
 Module
 Trigger Reason             Access violation
 Stack Trace

nsEventStateManager::DoWheelScroll 
[d:\builds\seamonkey\mozilla\content\events\src\nsEventStateManager.cpp, line 
1221] 
nsEventStateManager::PostHandleEvent 
[d:\builds\seamonkey\mozilla\content\events\src\nsEventStateManager.cpp, line 
1635] 
PresShell::HandleEventInternal 
[d:\builds\seamonkey\mozilla\layout\html\base\src\nsPresShell.cpp, line 5838] 
PresShell::HandleEvent 
[d:\builds\seamonkey\mozilla\layout\html\base\src\nsPresShell.cpp, line 5742] 
nsView::HandleEvent [d:\builds\seamonkey\mozilla\view\src\nsView.cpp, line 375] 
nsViewManager::DispatchEvent 
[d:\builds\seamonkey\mozilla\view\src\nsViewManager.cpp, line 1874] 
HandleEvent [d:\builds\seamonkey\mozilla\view\src\nsView.cpp, line 84] 
nsWindow::DispatchEvent 
[d:\builds\seamonkey\mozilla\widget\src\windows\nsWindow.cpp, line 748] 
nsWindow::DispatchWindowEvent 
[d:\builds\seamonkey\mozilla\widget\src\windows\nsWindow.cpp, line 765] 
nsWindow::ProcessMessage 
[d:\builds\seamonkey\mozilla\widget\src\windows\nsWindow.cpp, line 3792] 
nsWindow::ProcessMessage 
[d:\builds\seamonkey\mozilla\widget\src\windows\nsWindow.cpp, line 3770] 
nsWindow::WindowProc 
[d:\builds\seamonkey\mozilla\widget\src\windows\nsWindow.cpp, line 1013] 
USER32.DLL + 0x3eb0 (0x77e13eb0) 
USER32.DLL + 0x401a (0x77e1401a) 
USER32.DLL + 0x92da (0x77e192da) 
nsAppShellService::Run 
[d:\builds\seamonkey\mozilla\xpfe\appshell\src\nsAppShellService.cpp, line 303] 
netscp6.exe + 0x16b3 (0x004016b3) 
netscp6.exe + 0x121c (0x0040121c) 
netscp6.exe + 0x32a8 (0x004032a8) 
KERNEL32.DLL + 0x7903 (0x77e87903) 

Comment 6

[Madhur Bhatia]

i can reproduce the crash on macOS 10, also.

Comment 7

[Madhur Bhatia]

*** Bug 110101 has been marked as a duplicate of this bug. ***

Comment 8

[James Latian]

I am sorry but this is really a dup of 110101

For the life, if me I do not understand how can bug posted before this bug 
be a dup of this! This irks me to no end… this is done way to much on 
bugzilla.

This bug was first reported on Mac OS 9.x
May I point this bug 110193 is a dup of 110145 and 110101 both of which 
where filled FIRST.

Comment 9

[Blake Ross]

*** This bug has been marked as a duplicate of 110145 ***