Bug Report: Firefox 3.6.2 crashes on JavaScript heavy pages

[Garrett Cooper]

On Sat, Apr 3, 2010 at 3:30 AM, Edward Tjörnhammar <e at cube2.se> wrote:
> The browser crashes on JavaScript intensive pages. I've tried to debug
> the behavior but since firebug crashes with firefox this is a no go.
> I've tried disabling optimizations in the firefox makefile but it
> makes no difference.
>
> I don't believe it matters but my hardware is a Dell XPS m1210 laptop
> with intel graphics.
>
> What system:
> pylon# uname -a
> FreeBSD pylon 8.0-RELEASE FreeBSD 8.0-RELEASE #0: Sat Mar 13 18:50:29
> CET 2010     root at pylon:/usr/obj/usr/src/sys/PYLON  i386
>
> What makefile:
> pylon# grep Makefile,v /usr/ports/www/firefox/Makefile
> # $FreeBSD: ports/www/firefox/Makefile,v 1.221 2010/03/23 08:54:22 beat Exp $
>
> How to reproduce:
> I can reproduce this crash everytime by removing my .mozilla and then visit:
>  http://review.source.android.com/11633
> Most pages are Ok.
>
> Error message:
> Floating point exception (core dumped)
>
> Well.. the processor supports SSE instrincs, perhaps this is a SIMD
> optimization bug somewhere else, I remember I enabled that for some
> other port..
>
> Other notable behaviour:
> If i run firefox3 with truss -f firefox3 does not crash on the page.
> I could probably dive deeper into this.

    Doesn't crash for me on Firefox 3.5.8:

# /etc/make.conf:
CFLAGS		+= -fno-strict-aliasing -pipe
CXXFLAGS	+= -fno-strict-aliasing -pipe
# ...
CPUTYPE		:= nocona

    Do you have a custom make.conf file? If so, what's your processor
and your CPUTYPE / C*FLAGS?
Thanks,
-Garrett