Re: [Gimp-developer] plug-ins/file-jpeg : Segmentation fault

[Elle Stone <ellestone ninedegreesbelow com>]

On 01/29/2017 07:51 AM, Helmut Jarausch wrote:
> On 01/28/2017 08:28:34 PM, Elle Stone wrote:

> > FWIW, here is how I build babl/GEGL/GIMP from git:
> > http://ninedegreesbelow.com/photography/build-gimp-in-prefix-for-artists.html
> > What prefix are you installing babl/GEGL/GIMP from git in?
>
> I have my own ebuilds and they install into /usr
> > One thing that sometimes helps is to completely uninstall all versions
> > of babl/GEGL/GIMP (even the portage versions). Then in the prefix for
> > babl/GEGL/GIMP from git, delete and recreate the install folder, so
> > there's nothing left behind to interfere with a fresh install. And also
> > do "git clean -xdf" to get the build folders completely clean. And then
> > start installing from scratch.
>
> I've done that but the problem persists
>
> > The only other thing that comes to mind is whether your libraries for
> > jpeg, png, and tiff are all too old.
>
> I have media-libs/libjpeg-turbo-1.5.1
> media-libs/libpng-1.2.57
> media-libs/tiff-4.0.7

Just for reference, here's what I have:

media-libs/tiff-4.0.7
media-libs/libjpeg-turbo-1.5.0
media-libs/openjpeg-2.1.2
media-libs/libpng-1.6.27

I'm not sure whether GIMP uses lib-jpeg-turbo or openjpeg. But maybe 
installing openjpeg would help.

As we both have the same version of tiff installed, outdated libraries 
probably aren't the only problem, or else you would be able to export a 
tiff.

Your libpng is too old - I'm a bit surprised that recently pulled 
GIMP-2.9 builds at all given the older version of libpng.

> Do you have a hint on how to debug my problem?

Any problem that results specifically from an ebuild, no, I'm clueless. 
You could try building in a prefix as per my "how to build" article and 
see if you still have a problem exporting files.

Did you try using the "--enable-debug=yes" option when running 
autogen.sh, and then running GIMP under gdb?

I saw your stack trace but it didn't seem helpful, well, imho they often 
aren't. Beyond that, no, my apologies, I'm not very experienced at 
debugging code.

Oh, wait, looking at your stack trace again, it seems a bit odd that 
there is all this stuff about tiff when you are trying to output a jpeg. 
I've seen problems where there is interference between a GIMP plug-in 
for opening a raw file and the GIMP code for opening a tiff 
(http://gimp.1065349.n5.nabble.com/Darktable-plug-in-in-GIMP-td47681.html#a47692).

Elle