643142 - Reliable crash after using "webcomic reader" for hours

Status: RESOLVED WORKSFORME

(Firefox :: General, defect)

Description

[mitchell]

User-Agent:       Mozilla/5.0 (Windows NT 6.1; rv:2.0) Gecko/20100101 Firefox/4.0
Build Identifier: Mozilla/5.0 (Windows NT 6.1; rv:2.0) Gecko/20100101 Firefox/4.0

When using the Webcomic Reader userscript with the Scriptish addon to read a comic for a long period of time (Hundreds of pages), Firefox crashes. This is probably because Webcomic Reader preloads the next X pages of the comic for easy reading, but never unloads any pages, and eventually some kind of internal limit is breached. This crash is very reproducable, and only occours on a "page turn" by clicking the "next page" button created by the Webcomic Reader userscript. Easy to reporduce, but very slow. I will attempt to pin down exactly how many pages are in memory when FFx crashes, but if it is a memory issue this will likely not help much, as individual pages on mangafox.com vary in size greatly.  Crash may be triggered by attempting to display the next preloaded page, or perhaps by attempting to preload one more page.

Reproducible: Always

Steps to Reproduce:
1. Install Scriptish or Greasemonkey and the Webcomic Reader userscript from http://userscripts.org/scripts/show/59842
2.Open a long manga on mangafox.com, such as http://www.mangafox.com/manga/hajime_no_ippo/v01/c001/1.html
3.Read for an hour or so
Actual Results:  
CrashyMcCrashCrash on "Next Page"

Expected Results:  
Displayed the next page.

https://crash-stats.mozilla.com/report/index/bp-64285661-25ec-41b2-bd8d-e48522110319

Although this is a userscript crash, I reported it here because I don't really think it should be possible to crash FFx with JS, under ideal conditions. Here's to ideal conditions!

Not sure if this is Normal or Critical, as it's a crash, but it will occour to very few people, unless the bug is triggered by other scripts/activities.

Comment 1

[Matthias Versen [:Matti]]

Thanks for the good bug report !
Unfortunately the bug report is missing the symbols.
Ted: Do you know why the symbols are missing ?

Comment 2

[(not currently active) Ted Mielczarek]

It's not that symbols are missing, the minidump is missing some critical information. That's covered by bug 559661 (but I don't know anything to do to fix it).

Comment 3

[(not currently active) Ted Mielczarek]

We could probably get a good stack by downloading the minidump and opening it in Visual C++.

Comment 4

[mitchell]

I have been unable to reproduce this bug under Mac OS X. Same version Firefox, same computer, OSX 10.6. I got 1500 manga pages in the backlog, far beyond the crash point for windows.

Comment 5

[Wayne Mery (:wsmwk)]

WFM per reporter