Bug#1130606: python3-opencv: ImportError with current libopenexr-3-1-30

[Roland Mas]

Package: python3-opencv
Version: 4.10.0+dfsg-5
Severity: important

Dear Maintainer,

The "cv2" module can no longer be imported with current libopenexr-3-1-30.

root at nevermir:/# python3
Python 3.13.12 (main, Feb  4 2026, 15:06:39) [GCC 15.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import cv2
>>>
root at nevermir:/# apt update
Get:1 http://ftp.fr.debian.org/debian unstable InRelease [187 kB]
Get:2 http://ftp.fr.debian.org/debian unstable/main amd64 Packages.diff/Index
[63.6 kB]
Get:3 http://ftp.fr.debian.org/debian unstable/main amd64 Packages
T-2026-03-13-1404.32-F-2026-03-11-1400.04.pdiff [157 kB]
Get:3 http://ftp.fr.debian.org/debian unstable/main amd64 Packages
T-2026-03-13-1404.32-F-2026-03-11-1400.04.pdiff [157 kB]
Fetched 407 kB in 1s (296 kB/s)
17 packages can be upgraded. Run 'apt list --upgradable' to see them.
Notice: Some sources can be modernized. Run 'apt modernize-sources' to do so.
root at nevermir:/# dpkg -l libopenexr*
+-- Desired=Unknown/Install/Remove/Purge/Hold
|+- Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-
pend
||+ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||| Name                    Version      Architecture Description
+++-=======================-============-============-===========================================
ii  libopenexr-3-1-30:amd64 3.1.13-2+b1  amd64        runtime files for the
OpenEXR image library
root at nevermir:/# apt install libopenexr-3-1-30
Upgrading:
  libopenexr-3-1-30

Installing dependencies:
  libopenjph0.26

Summary:
  Upgrading: 1, Installing: 1, Removing: 0, Not Upgrading: 16
  Download size: 0 B / 876 kB
  Freed space: 3339 kB

Continue? [Y/n]
Selecting previously unselected package libopenjph0.26:amd64.
(Reading database ... 24342 files and directories currently installed.)
Preparing to unpack .../libopenjph0.26_0.26.3-1_amd64.deb ...
Unpacking libopenjph0.26:amd64 (0.26.3-1) ...
Preparing to unpack .../libopenexr-3-1-30_3.4.6+ds-2_amd64.deb ...
Unpacking libopenexr-3-1-30:amd64 (3.4.6+ds-2) over (3.1.13-2+b1) ...
Setting up libopenjph0.26:amd64 (0.26.3-1) ...
Setting up libopenexr-3-1-30:amd64 (3.4.6+ds-2) ...
Processing triggers for libc-bin (2.42-13) ...
root at nevermir:/# python3
Python 3.13.12 (main, Feb  4 2026, 15:06:39) [GCC 15.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import cv2
Traceback (most recent call last):
  File "<python-input-0>", line 1, in <module>
    import cv2
ImportError: libOpenEXR-3_1.so.30: cannot open shared object file: No such file
or directory
>>>
root at nevermir:/# dpkg -l python3-opencv
+-- Desired=Unknown/Install/Remove/Purge/Hold
|+- Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-
pend
||+ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||| Name           Version       Architecture Description
+++-==============-=============-============-=================================================
ii  python3-opencv 4.10.0+dfsg-7 amd64        Python 3 bindings for the
computer vision library
root at nevermir:/#

This blocks building other packages in unstable chroots (in my case, datalab).

Thanks,

Roland.


-- System Information:
Debian Release: 13.3
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 6.12.73+deb13-amd64 (SMP w/16 CPU threads; PREEMPT)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages python3-opencv depends on:
ii  libc6                                2.41-12+deb13u1
ii  libgcc-s1                            14.2.0-19
ii  libopencv-calib3d410                 4.10.0+dfsg-5
ii  libopencv-contrib410                 4.10.0+dfsg-5
ii  libopencv-core410                    4.10.0+dfsg-5
ii  libopencv-dnn410                     4.10.0+dfsg-5
ii  libopencv-features2d410              4.10.0+dfsg-5
ii  libopencv-flann410                   4.10.0+dfsg-5
ii  libopencv-highgui410                 4.10.0+dfsg-5
ii  libopencv-imgcodecs410               4.10.0+dfsg-5
ii  libopencv-imgproc410                 4.10.0+dfsg-5
ii  libopencv-ml410                      4.10.0+dfsg-5
ii  libopencv-objdetect410               4.10.0+dfsg-5
ii  libopencv-photo410                   4.10.0+dfsg-5
ii  libopencv-shape410                   4.10.0+dfsg-5
ii  libopencv-stitching410               4.10.0+dfsg-5
ii  libopencv-video410                   4.10.0+dfsg-5
ii  libopencv-videoio410                 4.10.0+dfsg-5
ii  libopencv-viz410                     4.10.0+dfsg-5
ii  libstdc++6                           14.2.0-19
ii  python3                              3.13.5-1
ii  python3-numpy [python3-numpy2-abi0]  1:2.2.4+ds-1

python3-opencv recommends no packages.

python3-opencv suggests no packages.

-- no debconf information