bug#57267: 28.1; emacs crashes when loading too many images

[james]

> I'd personally give jpeginfo a try.  It's cheap.  Just 'brew install'
> it.

All the jpegs were valid.

> On Aug 21, 2022, at 1:30 AM, Gerd Möllmann <gerd.moellmann@gmail.com> wrote:
> 
> james@jojojames.com writes:
> 
>> 
>>> Could it be that one or more jpegs of yours is invalid in some way?
>> Maybe you could check this with the 'jpeginfo' utitlity.  I've never
>> used it myself, because I don't have a use for it, but from what I read,
>> it might be able to detect at least some error cases.  Maybe it's worth
>> trying.
>> 
>> Do you think that would lead to a crash every time? My crashes are
>> very inconsistent.
> 
> I can't really answer that question because, as a starter, I don't even
> know what AppleVPA is doing when it crashes, and there's no way to find
> out, AFAIK.  In general, with multi-threading, ASLR, and whatnot, things
> tend to not behave consistently quite frequently, at least in my
> experience.
> 
> I'd personally give jpeginfo a try.  It's cheap.  Just 'brew install'
> it.
> 
>>> Another idea might be to try and install an external jpeg library
>> (libjpeg I presume), and configure Emacs to use it.  Alas, this doesn't
>> seem to work on my M1 Mac, but maybe it does on your x86_64 system.
>> 
>> Can you point me to some documentation for that?
> 
> I can't find documentation for this.  I guess I only "know" about this
> because I added it in 1998, according to the ChangeLog, which must be a
> lie :-).
> 
> Anyways.  On my system, I just did 'brew install libjpeg' and then
> './configure'.  The file config.log showed that configure was trying to
> use libjpeg, but didn't like it for some reason I don't remember.
> 
> BTW, Homebrew also has other jpeg libs ('brew search jpeg' and so on),
> but I didn't try them all.  As I mentioned, I don't do much with images
> myself.
> 
> Maybe it's also worth asking an help-gnu-emacs, if this doesn't work.
> Or someone reading this knows more about this topic.