Dear Maintainer,

F3D [1] uses Assimp to open COLLADA files. The associated autopkgtest fails on
s390x architecture only.

The test tries to open the COLLADA Example from the 1.5 documentation with is a
simple white cube [2] (see Appendix A).

The Assimp error description is: "Expected different index count in <p>
element."

I've created a minimal example to reproduce the issue [3].
The "correct" output using amd64 platform is:
Info,  T0: Load cube.dae
Debug, T0: Assimp 5.2.0 amd64 gcc debug shared singlethreadedsingle :
Info,  T0: Found a matching importer for this file format: Collada Importer.
Info,  T0: Import root directory is './'
Debug, T0: Collada schema version is 1.5.n
Debug, T0: UpdateImporterScale scale set: 1
Info,  T0: Entering post processing pipeline
Debug, T0: LimitBoneWeightsProcess begin
Debug, T0: LimitBoneWeightsProcess end
Info,  T0: Leaving post processing pipeline
Assimp import OK

The "wrong" output using s390x platform (zelenka porter box) is:
Info,  T0: Load cube.dae
Debug, T0: Assimp 5.2.0 s390x gcc debug shared singlethreadedsingle :
Info,  T0: Found a matching importer for this file format: Collada Importer.
Info,  T0: Import root directory is './'
Debug, T0: Collada schema version is 1.5.n
Error, T0: Expected different index count in <p> element.
Assimp error: Expected different index count in <p> element.

Thanks!

François

[1] https://tracker.debian.org/pkg/f3d
[2] https://www.khronos.org/files/collada_spec_1_5.pdf
[3] https://salsa.debian.org/mzf/assimp-collada-test

We believe that the bug you reported is fixed in the latest version of
f3d, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1023212@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Francois Mazen <francois@mzf.fr> (supplier of updated f3d package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Mon, 31 Oct 2022 19:15:04 +0100
Source: f3d
Architecture: source
Version: 1.3.1+dfsg-4
Distribution: unstable
Urgency: medium
Maintainer: Francois Mazen <francois@mzf.fr>
Changed-By: Francois Mazen <francois@mzf.fr>
Closes: 1023212
Changes:
 f3d (1.3.1+dfsg-4) unstable; urgency=medium
 .
   * Improve logging of Assimp error.
   * Do not use Assimp for s390x due to big endian issue (Closes: #1023212)
   * Activate OpenCascade module and add relevant autopkgtest
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