[Therion] therion crashes on debian testing (bullseye)

[Olly Betts]

On Thu, Sep 12, 2019 at 09:09:29PM +0200, Benedikt Hallinger wrote:
> i upgraded my debian testing installation some time ago and since then,
> therion wont compile anymore.

Do you have any idea when "some time ago" was?  If we know when this
broke that would help narrow down the culprit.

> configuration file: therion/model.hirlatz-dop-1m_geoland-dom-10mALS.thconfig
> reading ... done
> reading source files ... proj_create: Error -1: no arguments in
> initialization list
> 
> therion: error -- PROJ4 library: -1 (no arguments in initialization list)
> ------------------------------------
> 
> I cant figure out whats wrong....

I'd guess a something changed with PROJ.  Therion uses the library from
proj 5.2.0-1 which was uploaded nearly a year ago, but there's a
proj-data package which got updated on 2019-09-04 to come from proj
6.2.0-1 instead of 5.2.0-1.  So if "some time ago" was after that
then this could be the cause.

Debian has continuous integration to attempt to catch this sort of
problem, but that's currently green:

https://ci.debian.net/packages/t/therion/testing/amd64/

The current CI test tries to process:

therion samples/morphing/sample1/thconfig.1

and checks that a non-empty cave1.pdf is produced.

But unfortunately that sample doesn't use coordinate systems so wouldn't
catch issues with PROJ (it seems none of the supplied samples do).

I tried adding "cs" and "fix" lines to that sample, but it processes OK
so it seems it's something specific to your example, or perhaps to your
installation.  Can you show a cut-down example which fails?  If you
replace the survey data with a single dummy leg and change the entrance
coordinates to be something random but valid there shouldn't be anything
potentially sensitive revealed.

> Also loch crashes, is this related?
> --------------------------
> $ loch
> Error: glXCreateContext failed
> --------------------------

It seems unlikely to be related.

I see this too - it happens if "execution fails on the client side"
apparently:

https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glXCreateContext.xml

That seems uselessly vague though.

Cheers,
    Olly