Another Firefox 21.0 crash (new backtrace)

Ted Faber faber at
Sun Jun 2 20:51:10 UTC 2013

On Sun, Jun 02, 2013 at 05:35:27PM +0200, Dimitry Andric wrote:
> On May 29, 2013, at 05:53, Ted Faber <faber at> wrote:
> > On Tue, May 28, 2013 at 08:52:35AM -0700, Ted Faber wrote:
> >> On Tue, May 28, 2013 at 02:00:00PM +0200, Dimitry Andric wrote:
> >>> On 2013-05-26 01:07, Ted Faber wrote:
> >>>> I'm seeing a repeatable, consistent segmentation fault before the first
> >>>> window appears (though firefox -ProfileManager brings up the
> >>>> profile manager, but crashes when I try to actually start the browser).
> ...
> > OK, I improved my svn fu, pulled the tree, extracted the patch, applied
> > it, made and installed world.
> > 
> > Now I see different behavior, but no better.  Still gets a SEGV, but a
> > different trace. (Attached)
> Ok, I think I have figured out what the problem is: Firefox's JavaScript
> OSFile implementation loads if it is available!  That is, if
> you have the compat6x package installed, it loads
> /usr/local/lib/, even while /lib/ is already loaded.
> This wreaks havoc when it later tries to call libc functions via libffi,
> and the result is that it calls into a completely bogus PLT entry.  Most
> of the time, this leads to a crash.
> So the easiest way to avoid the crash for now is to uninstall the
> compat6x package, and making sure there is no in
> /usr/local/lib/compat.  Then Firefox should start with no problems.

Removing the compat6x package does fix my problem.

Thanks enormously.  I'll reinstall and give your patch a try next, but
this is clearly the right bug.

Thanks enormously!

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