Your message dated Thu, 05 Feb 2026 23:25:04 +0000
with message-id <[email protected]>
and subject line Bug#1126861: fixed in vtk9 9.5.2+dfsg3-6
has caused the Debian Bug report #1126861,
regarding vtk9: bigendian (s390x) pyvista triggers segfault in
vtkMatplotlibMathTextUtilities::RenderOneCell
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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--
1126861: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1126861
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: vtk9
Version: 9.5.2+dfsg3-4
Severity: normal
X-Debbugs-Cc: [email protected]
User: [email protected]
Usertags: s390x
Control: affects -1 src:python-pyvista
Control: forwarded -1 https://gitlab.kitware.com/vtk/vtk/-/issues/19931
CI testing of the debian package of pyvista 0.46.5-6 is finding a
segfault on bigendian s390x with libvtk-9.5 9.5.2+dfsg3-4. One thing
that is strange is that the test is passing with debian's earlier
build libvtk-9.5 9.5.2+dfsg2-4. The only substantial difference that I
can see between the two builds of VTK 9.5 is activation of parallel
HDF5 and xdmf3.
The passing pvista tests are logged at
https://ci.debian.net/packages/p/python-pyvista/testing/s390x/68318604/
The failing tests are logged at
https://ci.debian.net/packages/p/python-pyvista/testing/s390x/68332331/
or
https://ci.debian.net/packages/p/python-pyvista/unstable/s390x/68319108/
The pyvista error in those logs indicates a segfault in Render
...
501s
tests/plotting/test_plotting.py::test_direction_objects[ParametricCrossCap-neg]
PASSED [ 41%]
502s tests/plotting/test_plotting.py::test_plot_texture_alone PASSED [
41%]
502s tests/plotting/test_plotting.py::test_add_text_latex Fatal Python error:
Segmentation fault
502s
502s Thread 0x000003ff195ea8e0 (most recent call first):
502s File "/usr/lib/python3.13/threading.py", line 363 in wait
502s File "/usr/lib/python3.13/threading.py", line 660 in wait
502s File "/usr/lib/python3/dist-packages/tqdm/_monitor.py", line 60 in run
502s File "/usr/lib/python3.13/threading.py", line 1044 in _bootstrap_inner
502s File "/usr/lib/python3.13/threading.py", line 1015 in _bootstrap
502s
502s Current thread 0x000003ffa12f8140 (most recent call first):
502s File
"/tmp/autopkgtest-lxc.j0qtm0bb/downtmp/build.9ci/src/pyvista/plotting/plotter.py",
line 2158 in render
502s File
"/tmp/autopkgtest-lxc.j0qtm0bb/downtmp/build.9ci/src/pyvista/plotting/plotter.py",
line 7221 in show
502s File
"/tmp/autopkgtest-lxc.j0qtm0bb/downtmp/build.9ci/src/pyvista/_deprecate_positional_args.py",
line 245 in inner_f
502s File
"/tmp/autopkgtest-lxc.j0qtm0bb/downtmp/build.9ci/src/tests/plotting/test_plotting.py",
line 3172 in test_add_text_latex
I can reproduce the error on the s390x porterbox and get a gdb
backtrace via `xvfb-run -a gdb python3.13`
(gdb) run -m pytest -v tests/plotting/test_plotting.py -k test_add_text_latex
Starting program: /usr/bin/python3.13 -m pytest -v
tests/plotting/test_plotting.py -k test_add_text_latex
...
Thread 1 "python3.13" received signal SIGSEGV, Segmentation fault.
(gdb) bt
#0 0x000003ffe231e7ca in
vtkMatplotlibMathTextUtilities::RenderOneCell(vtkImageData*, int*, long, long,
vtkSmartPyObject&, unsigned long, unsigned long, unsigned long, unsigned long,
vtkTextProperty*, TextColors const&) () from
/usr/lib/python3/dist-packages/vtkmodules/../../../s390x-linux-gnu/libvtkRenderingMatplotlib-9.5.so.1
#1 0x000003ffe2320870 in vtkMatplotlibMathTextUtilities::RenderString(char
const*, vtkImageData*, vtkTextProperty*, int, int*) ()
from
/usr/lib/python3/dist-packages/vtkmodules/../../../s390x-linux-gnu/libvtkRenderingMatplotlib-9.5.so.1
#2 0x000003ffe6d19444 in
vtkMathTextFreeTypeTextRenderer::RenderStringInternal(vtkTextProperty*,
vtkStdString const&, vtkImageData*, int*, int, int) ()
from
/usr/lib/python3/dist-packages/vtkmodules/../../../s390x-linux-gnu/libvtkRenderingFreeType-9.5.so.1
#3 0x000003ffecca8b78 in vtkTextMapper::UpdateImage(int) () from
/usr/lib/python3/dist-packages/vtkmodules/../../../s390x-linux-gnu/libvtkRenderingCore-9.5.so.1
#4 0x000003ffecca9462 in vtkTextMapper::GetSize(vtkViewport*, int*) () from
/usr/lib/python3/dist-packages/vtkmodules/../../../s390x-linux-gnu/libvtkRenderingCore-9.5.so.1
#5 0x000003ffe5598158 in
vtkCornerAnnotation::RenderOpaqueGeometry(vtkViewport*) () from
/usr/lib/python3/dist-packages/vtkmodules/../../../s390x-linux-gnu/libvtkRenderingAnnotation-9.5.so.1
#6 0x000003ffecc19c82 in vtkRenderer::UpdateOpaquePolygonalGeometry() () from
/usr/lib/python3/dist-packages/vtkmodules/../../../s390x-linux-gnu/libvtkRenderingCore-9.5.so.1
#7 0x000003ffe44384ae in
vtkOpenGLRenderer::UpdateGeometry(vtkFrameBufferObjectBase*) () from
/usr/lib/python3/dist-packages/vtkmodules/../../../s390x-linux-gnu/libvtkRenderingOpenGL2-9.5.so.1
#8 0x000003ffe4436f14 in vtkOpenGLRenderer::DeviceRender() () from
/usr/lib/python3/dist-packages/vtkmodules/../../../s390x-linux-gnu/libvtkRenderingOpenGL2-9.5.so.1
#9 0x000003ffecc1dbe0 in vtkRenderer::Render() () from
/usr/lib/python3/dist-packages/vtkmodules/../../../s390x-linux-gnu/libvtkRenderingCore-9.5.so.1
#10 0x000003ffecc3452e in vtkRendererCollection::Render() () from
/usr/lib/python3/dist-packages/vtkmodules/../../../s390x-linux-gnu/libvtkRenderingCore-9.5.so.1
#11 0x000003ffecbfdeba in vtkRenderWindow::DoStereoRender() () from
/usr/lib/python3/dist-packages/vtkmodules/../../../s390x-linux-gnu/libvtkRenderingCore-9.5.so.1
#12 0x000003ffecbff830 in vtkRenderWindow::Render() () from
/usr/lib/python3/dist-packages/vtkmodules/../../../s390x-linux-gnu/libvtkRenderingCore-9.5.so.1
#13 0x000003ffe44337d2 in vtkOpenGLRenderWindow::Render() () from
/usr/lib/python3/dist-packages/vtkmodules/../../../s390x-linux-gnu/libvtkRenderingOpenGL2-9.5.so.1
#14 0x000003ffe4540070 in vtkXOpenGLRenderWindow::Render() () from
/usr/lib/python3/dist-packages/vtkmodules/../../../s390x-linux-gnu/libvtkRenderingOpenGL2-9.5.so.1
#15 0x000003ffe4082d14 in ?? () from
/usr/lib/python3/dist-packages/vtkmodules/vtkRenderingOpenGL2.cpython-313-s390x-linux-gnu.so
Issue raised upstream https://gitlab.kitware.com/vtk/vtk/-/issues/19931
--- End Message ---
--- Begin Message ---
Source: vtk9
Source-Version: 9.5.2+dfsg3-6
Done: Drew Parsons <[email protected]>
We believe that the bug you reported is fixed in the latest version of
vtk9, 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 [email protected],
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Drew Parsons <[email protected]> (supplier of updated vtk9 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 [email protected])
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
Format: 1.8
Date: Thu, 05 Feb 2026 20:55:34 +0100
Source: vtk9
Architecture: source
Version: 9.5.2+dfsg3-6
Distribution: unstable
Urgency: medium
Maintainer: Debian Science Maintainers
<[email protected]>
Changed-By: Drew Parsons <[email protected]>
Closes: 1126861
Changes:
vtk9 (9.5.2+dfsg3-6) unstable; urgency=medium
.
* Team upload.
* debian patch matplotlib_nullptr_s390x.patch handles case of null
ScalarPointer in image in vtkMatplotlibMathTextUtilities::RenderOneCell
A null pointer was generated on s390x causing pyvista
test_add_text_latex to segfault. Closes: #1126861
* add alpha to list of ADIOS2-supporting arches in
Build-Depends: libadios2-mpi-c++-dev
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