[Pkg-opencl-devel] Bug#1086460: Fw: [Debian-pan-maintainers] Bug#1090719: nabu: Debci errors with latest pocl

[Pierre Paleo]

Hello,

Nabu maintainer here.
Thank you for your work to integrate nabu in Debian.

Following up this problem, I believe that the source of the issue is 
VKFFT when used with a non-standard shape doing real-to-complex transform.
Here is a minimalist code (not involving nabu) that makes pocl crash 
(just tested on a fresh sid installation in a chroot on my side):

import numpy as np
import pyopencl as cl
import pyopencl.array as parray
from pyvkfft.opencl import VkFFTApp

ctx = cl.create_some_context()
queue = cl.CommandQueue(ctx)

d_in = parray.zeros(queue, 300, "f")
d_out = parray.zeros(queue, 151, np.complex64)

vk0 = VkFFTApp(d_in.shape, np.float32, queue, r2c=True, inplace=False)
vk0.fft(d_in, dest=d_out)

In nabu, the specific unit test involving vkfft + this "unusual" 
transform has been disabled 
<https://gitlab.esrf.fr/tomotools/nabu/-/merge_requests/518> in nabu 
2024.2.0, which released a few days ago.
So I'd advise to use the latest pypi release (now nabu 2024.2.1) if 
possible.

Thank you,

Best regards,

Pierre


Le 18/12/2024 à 14:12, Jerome Kieffer a écrit :
>
> Begin forwarded message:
>
> Date: Wed, 18 Dec 2024 09:38:25 +0100
> From: Andreas Tille<tille at debian.org>
> To: Debian Bug Tracking System<submit at bugs.debian.org>
> Subject: [Debian-pan-maintainers] Bug#1090719: nabu: Debci errors with latest pocl
>
>
> Source: nabu
> Version: 2024.2.0-1
> Severity: important
> X-Debbugs-Cc:1086460 at bugs.debian.org
>
> Hi,
>
> as you can see in Debci log[1] nabu fails its autopkgtest since the
> latest upload of pocl.  This affects the pocl testing migration as well
> as quite a number of resulting autoremoval of pocl rdepends.  It would
> be great if you could have a look.
>
> My personal first approach would be to upgrade the latest micro version
> upgrade of nabu, but that's just a gut feeling.
>
> Kind regards
>      Andreas.
>
> [1]https://ci.debian.net/packages/n/nabu/testing/amd64/55507284/
>
> -- System Information:
> Debian Release: trixie/sid
>    APT prefers testing
>    APT policy: (501, 'testing'), (50, 'buildd-unstable'), (50, 'unstable'), (5, 'experimental'), (1, 'buildd-experimental')
> Architecture: amd64 (x86_64)
>
> Kernel: Linux 6.11.10-amd64 (SMP w/4 CPU threads; PREEMPT)
> Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), LANGUAGE=de_DE:de
> Shell: /bin/sh linked to /usr/bin/dash
> Init: systemd (via /run/systemd/system)
> LSM: AppArmor: enabled
>
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