302355 - Frequent crashes when loading JS

Status: RESOLVED WORKSFORME

(Core :: JavaScript Engine, defect)

Description

[Neil Lee [:neilio]]

User-Agent:       Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.8b4) Gecko/20050726 Firefox/1.0+
Build Identifier: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.8b4) Gecko/20050726 Firefox/1.0+

I've noticed in the last two or three nightlies that there are lots of crashes
happening. It seems to occur when the browser loads linked scripts.
Unfortunately, it's not 100% reproducible, but it's still frequent - I get
around 6-12 crashes every day, all with the same stack.

The cited URL (my personal site) has a linked external JS file near the bottom
of the page which caused the stack I'm attaching to this bug.

Reproducible: Sometimes

Comment 1

[Neil Lee [:neilio]]

Attachment: Crash log

Comment 2

[Boris Zbarsky [:bzbarsky]]

Neil, do you think you could catch the stack in a debugger?  Or are you using a
release build?

Also, do you think you could narrow down the build when the problem started
happening?  That would give us an idea of what might have broken....

Comment 3

[Neil Lee [:neilio]]

> Neil, do you think you could catch the stack in a debugger? 

Boris, how would I do that on Mac OS X? I have XCode installed, but I've never caught a stack "in a 
debugger" before. :)

I believe these crashes started occurring about three, maybe four days ago?

Comment 4

[Neil Lee [:neilio]]

(sorry for the bug spam)

The posted stack was from the 0726 nightly. I've cleaned my profile twice, though I am running with a 
small number of extensions loaded.

Comment 5

[timeless]

xcode can attach to processes. (and the documentation should be able to help you
find that) i'm not sure how useful attaching to a release build would be, it'd
probably help if you built deerpark yourself.

Comment 6

[Asa Dotzler [:asa]]

This is pretty low on the alpha2 topcrash list (#75, I think). Unless it gets
higher, I don't think we'd block on this.