400632 - Frequent Access Violations

Status: VERIFIED INCOMPLETE

(Firefox :: General, defect)

Description

[Rob Davis]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.8.1.8) Gecko/20071008 Firefox/2.0.0.8
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.8.1.8) Gecko/20071008 Firefox/2.0.0.8

Since version 2.0.0.6 Firefox crashes very very frequently when visiting quite innocuous sites, an example of which is in the url.

When debugging with Visual Studio I got the following error message:
Unhandled exception at 0x00000004 in firefox.exe: 0xC0000005: Access violation reading location 0x055e9000.

Then trying again, not restoring the session since to do so meant Firefox crashed every time, I got this exeption:

Unhandled exception at 0x00000000 in firefox.exe: 0xC0000005: Access violation reading location 0x0000014f.

Reproducible: Always

Steps to Reproduce:
1.
2.
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Comment 1

[Matthias Versen [:Matti]]

Please provide a Talkback crash ID from that crash (http://kb.mozillazine.org/Talkback)

Comment 2

[Rob Davis]

This is still happening, at times 20 times a day, it's also happening regularly to two friends of mine.  Try http://www.velovision.co.uk/smallad/forsale.html for instance, this site now crashes every time, though prior to version 2.0.0.5 it gave no problem.  I'm now running version 2.0.0.8

Comment 3

[alberto.orlandini]

It also happens to me, I have
Mozilla/5.0 (Windows; U; Windows NT 5.1; it; rv:1.8.1.11) Gecko/20071127 Firefox/2.0.0.11 with no further extension installed.

It often crashes, let's say once every 10 use sessions, while I'm doing nothing particular, for instance when I'm on youtube... but I noticed it often crashes when I close a tab or when I open a new blank tab... Visual Studio Debug always says Access Violation and the Disassembly of the execution thread is often blocked on one of these two instructions:
6011CB7C  mov         al,byte ptr [esi] 
but esi is not null, or
027EC9E6  mov         byte ptr ds:[00000103h],al

Comment 4

[Matthias Versen [:Matti]]

Don't assume that a report with "crashes often" is the same bug you are seeing unless you have a complete stack trace. Please file your own bug report alberto.orlandini but only if you have a Talkback or Breakpad id of such crashes.

marking this bug incomplete unless the reporter can provide a Talkback or Breakpad crash id.