[petsc-users] Segfault in DMCreateMatrix

[Matthew Knepley]

On Fri, Jul 25, 2025 at 3:00 PM Blondel, Sophie via petsc-users <
petsc-users at mcs.anl.gov> wrote:

> Hi,
>
> I am using PETSc version v3.23.4 for my code
> https://urldefense.us/v3/__https://github.com/ORNL-Fusion/xolotl/blob/develop/xolotl/solver/src/PetscSolver.cpp__;!!G_uCfscf7eWS!ZP6ogmTTYFdFBmqAralMBdfthDbAfo3gRRaJxI4kJX0cKTmrR9rkgiYJQs6MvFSUs1NWo4VjX1oVeBGyBkX8$ 
> <https://urldefense.us/v3/__https://github.com/ORNL-Fusion/xolotl/blob/develop/xolotl/solver/src/PetscSolver.cpp__;!!G_uCfscf7eWS!dqsvk_x8eZNzest4mbTcVDQ6NcJLDJOQGX0QxmrWxJeM8s8Hi2altiu6F4EFTeZLDmw5F1rDvE-jHw3VgvjKx_kg$> and
> I am getting a segfault in DMCreateMatrix, more specifically from gdb:
> #0  0x0000000000000651 in ?? ()
> #1  0x00007ffff58f0119 in DMCreateMatrix (dm=0x55555571bb90,
> mat=0x7fffffffc680)
>     at
> /home/sophie/Workspace/xolotl-develop-source/external/petsc/src/dm/interface/dm.c:1519
> #2  0x00007ffff7cafc9d in xolotl::solver::PetscSolver::initialize(int,
> double, _p_DM*, _p_Vec*) ()
>    from
> /home/sophie/Workspace/xolotl-develop-build/xolotl/solver/libxolotlSolver.so
>
> PETSc was built with:
> ./configure
> PETSC_DIR=/home/sophie/Workspace/xolotl-develop-source/external/petsc
> PETSC_ARCH=dbg
> --prefix=/home/sophie/Workspace/xolotl-develop-build/external/petsc_install
> --with-fc=0 --with-cuda=0 --with-mpi --with-openmp=0 --with-debugging=1
> --with-shared-libraries --with-64-bit-indices --download-kokkos
> --download-kokkos-kernels --with-cudac=0
>
> Let me know what additional information I can provide to resolve the issue.
>

This was fixed here:
https://urldefense.us/v3/__https://gitlab.com/petsc/petsc/-/commit/4758e3ce3f4cc9adc2a49a02e2f05c2a0f943969__;!!G_uCfscf7eWS!ZP6ogmTTYFdFBmqAralMBdfthDbAfo3gRRaJxI4kJX0cKTmrR9rkgiYJQs6MvFSUs1NWo4VjX1oVeHqfyjIi$ 
so it will make it to the point release Sept 28, or it is in main.

  Thanks,

     Matt


> Best,
>
> Sophie
>


-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener

https://urldefense.us/v3/__https://www.cse.buffalo.edu/*knepley/__;fg!!G_uCfscf7eWS!ZP6ogmTTYFdFBmqAralMBdfthDbAfo3gRRaJxI4kJX0cKTmrR9rkgiYJQs6MvFSUs1NWo4VjX1oVeBC8AX31$  <https://urldefense.us/v3/__http://www.cse.buffalo.edu/*knepley/__;fg!!G_uCfscf7eWS!ZP6ogmTTYFdFBmqAralMBdfthDbAfo3gRRaJxI4kJX0cKTmrR9rkgiYJQs6MvFSUs1NWo4VjX1oVeA4tDHTl$ >
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