Your message dated Thu, 25 Feb 2021 22:20:00 +0000
with message-id <e1lfozi-00037k...@fasolo.debian.org>
and subject line Bug#982553: fixed in python-aalib 0.4-1
has caused the Debian Bug report #982553,
regarding python3-aalib: ABI mismatch on amd64
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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--
982553: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=982553
Debian Bug Tracking System
Contact ow...@bugs.debian.org with problems
--- Begin Message ---
Package: python3-aalib
Version: 0.3.2-4
Severity: normal
Dear Maintainer,
It looks like there's an ABI mismatch between the structure layout
declared in the python code and the actual layout.
It causes python to allocate less memory than needed by the C library.
On rare occasions, the uninitialized field gets a non-zero value, which
produce weird behaviors.
Specifically, the struct fields of aa_hardware_params and
aa_render_params are only aligned on 4 bytes on i386 when compiled with
gcc. Not on x64 or any other architecture as far as I can tell.
When reading the beginning of aalib.h we can see:
/* The -malign-double switch changes binarry compatibility with structures
containing floating point values. To avoid this, set alignment manually
to old value. */
#ifdef __GNUC__
#ifdef __i386__
#define __AA_ALIGN __attribute__ ((__aligned__ (4)))
#define __AA_NOALIGN __attribute__ ((__packed__))
#endif
#endif
Which shows explicitely that the struct fields are only aligned or
packed on i386. Given the specificity of the condition and the comment
above, my guess would be that this was made only to prevent an ABI
breakage when upgrading gcc, and not a general definition.
Therefore I think that the _pack_ = 4 attribute when declaring the
structures is too strict.
class HardwareSettings(Structure):
_pack_ = 4
_fields_ = [
# ...
]
Although I have no clue how to detect it, this should probably be set
only for the 32 bits builds on intel-compatible platforms (only when
__i386__ is set). Note that 32 bits systems can be installed on 64 bits
hardware, and 32 bits builds of python can be installed in 64 bits
debian systems. So it should really be the ELFCLASS of the library that
should be tested, neither the architecture of the hardware nor the
debian arch.
On the other hand, maybe an easier fix would be to have a more
consistent ABI on the aalib side? Although this would mean bumping the
ABI version and possibly breaking many packaged, this might be the best
long-term solution. If you think so, feel free to reassign this bug
report as needed.
Best regards,
Celelibi
-- System Information:
Debian Release: bullseye/sid
APT prefers testing
APT policy: (990, 'testing'), (500, 'testing-debug'), (500, 'unstable')
Architecture: amd64 (x86_64)
Kernel: Linux 5.9.0-5-amd64 (SMP w/2 CPU threads)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages python3-aalib depends on:
ii libaa1 1.4p5-48
ii python3 3.9.1-1
python3-aalib recommends no packages.
Versions of packages python3-aalib suggests:
ii python3-pil 8.1.0-1
-- no debconf information
--- End Message ---
--- Begin Message ---
Source: python-aalib
Source-Version: 0.4-1
Done: Stefano Rivera <stefa...@debian.org>
We believe that the bug you reported is fixed in the latest version of
python-aalib, 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 982...@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Stefano Rivera <stefa...@debian.org> (supplier of updated python-aalib 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 ftpmas...@ftp-master.debian.org)
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
Format: 1.8
Date: Thu, 25 Feb 2021 14:01:48 -0800
Source: python-aalib
Architecture: source
Version: 0.4-1
Distribution: unstable
Urgency: medium
Maintainer: Debian Python Team <team+pyt...@tracker.debian.org>
Changed-By: Stefano Rivera <stefa...@debian.org>
Closes: 982553
Changes:
python-aalib (0.4-1) unstable; urgency=medium
.
[ Stefano Rivera ]
* New upstream release. (Closes: #982553)
* Bump copyright years.
* Add upstream metadata.
* Bump Standards-Version to 4.5.1, no changes needed.
* Run the new ABI-test.
- B-D on libaa1-dev.
* Install the changelog with dh_installchangelogs. There are no other docs
to install.
* Bump watch file to version 4.
.
[ Ondřej Nový ]
* d/control: Update Maintainer field with new Debian Python Team
contact address.
* d/control: Update Vcs-* fields with new Debian Python Team Salsa
layout.
.
[ Debian Janitor ]
* Set upstream metadata fields: Repository.
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