Bug#1096535: dolfinx-mpc: ftbfs with GCC-15

[Matthias Klose]

Package: src:dolfinx-mpc
Version: 0.9.0-2
Severity: important
Tags: sid forky
User: debian-gcc at lists.debian.org
Usertags: ftbfs-gcc-15

[This bug is NOT targeted to the upcoming trixie release]

Please keep this issue open in the bug tracker for the package it
was filed for.  If a fix in another package is required, please
file a bug for the other package (or clone), and add a block in this
package. Please keep the issue open until the package can be built in
a follow-up test rebuild.

The package fails to build in a test rebuild on at least amd64 with
gcc-15/g++-15, but succeeds to build with gcc-14/g++-14. The
severity of this report will be raised before the forky release.

The full build log can be found at:
http://qa-logs.debian.net/2025/02/16/amd64exp/dolfinx-mpc_0.9.0-2_unstable_gccexp.log.gz
The last lines of the build log are at the end of this report.

To build with GCC 15, either set CC=gcc-15 CXX=g++-15 explicitly,
or install the gcc, g++, gfortran, ... packages from experimental.

  apt-get -t=experimental install g++ 

GCC 15 now defaults to the C23/C++23 standards, exposing many FTBFS.
Other Common build failures are new warnings resulting in build failures
with -Werror turned on, or new/dropped symbols in Debian symbols files.
For other C/C++ related build failures see the porting guide at
http://gcc.gnu.org/gcc-15/porting_to.html

[...]
FAILED test_matrix_assembly.py::test_mpc_assembly[CellType.quadrilateral-1-master_point1-C++]
FAILED test_matrix_assembly.py::test_mpc_assembly[CellType.quadrilateral-2-master_point0-C++]
FAILED test_matrix_assembly.py::test_mpc_assembly[CellType.quadrilateral-2-master_point1-C++]
FAILED test_matrix_assembly.py::test_mpc_assembly[CellType.quadrilateral-3-master_point0-C++]
FAILED test_matrix_assembly.py::test_mpc_assembly[CellType.quadrilateral-3-master_point1-C++]
FAILED test_matrix_assembly.py::test_mpc_assembly[CellType.triangle-1-master_point0-C++]
FAILED test_matrix_assembly.py::test_mpc_assembly[CellType.triangle-1-master_point1-C++]
FAILED test_matrix_assembly.py::test_mpc_assembly[CellType.triangle-2-master_point0-C++]
FAILED test_matrix_assembly.py::test_mpc_assembly[CellType.triangle-2-master_point1-C++]
FAILED test_matrix_assembly.py::test_mpc_assembly[CellType.triangle-3-master_point0-C++]
FAILED test_matrix_assembly.py::test_mpc_assembly[CellType.triangle-3-master_point1-C++]
FAILED test_matrix_assembly.py::test_slave_on_same_cell[CellType.triangle-1-master_point0-C++]
FAILED test_matrix_assembly.py::test_slave_on_same_cell[CellType.triangle-1-master_point1-C++]
FAILED test_matrix_assembly.py::test_slave_on_same_cell[CellType.triangle-2-master_point0-C++]
FAILED test_matrix_assembly.py::test_slave_on_same_cell[CellType.triangle-2-master_point1-C++]
FAILED test_matrix_assembly.py::test_slave_on_same_cell[CellType.triangle-3-master_point0-C++]
FAILED test_matrix_assembly.py::test_slave_on_same_cell[CellType.triangle-3-master_point1-C++]
FAILED test_matrix_assembly.py::test_slave_on_same_cell[CellType.quadrilateral-1-master_point0-C++]
FAILED test_matrix_assembly.py::test_slave_on_same_cell[CellType.quadrilateral-1-master_point1-C++]
FAILED test_matrix_assembly.py::test_slave_on_same_cell[CellType.quadrilateral-2-master_point0-C++]
FAILED test_matrix_assembly.py::test_slave_on_same_cell[CellType.quadrilateral-2-master_point1-C++]
FAILED test_matrix_assembly.py::test_slave_on_same_cell[CellType.quadrilateral-3-master_point0-C++]
FAILED test_matrix_assembly.py::test_slave_on_same_cell[CellType.quadrilateral-3-master_point1-C++]
FAILED test_mpc_pipeline.py::test_pipeline[master_point0-C++] - TypeError: __...
FAILED test_mpc_pipeline.py::test_pipeline[master_point1-C++] - TypeError: __...
FAILED test_mpc_pipeline.py::test_linearproblem[master_point0] - TypeError: _...
FAILED test_mpc_pipeline.py::test_linearproblem[master_point1] - TypeError: _...
FAILED test_nonlinear_assembly.py::test_nonlinear_poisson[1] - TypeError: cre...
FAILED test_nonlinear_assembly.py::test_nonlinear_poisson[2] - TypeError: cre...
FAILED test_nonlinear_assembly.py::test_nonlinear_poisson[3] - TypeError: cre...
FAILED test_nonlinear_assembly.py::test_homogenize[1-0] - TypeError: create_p...
FAILED test_nonlinear_assembly.py::test_homogenize[1-1] - TypeError: create_p...
FAILED test_nonlinear_assembly.py::test_homogenize[1-2] - TypeError: create_p...
FAILED test_nonlinear_assembly.py::test_homogenize[2-0] - TypeError: create_p...
FAILED test_nonlinear_assembly.py::test_homogenize[2-1] - TypeError: create_p...
FAILED test_nonlinear_assembly.py::test_homogenize[2-2] - TypeError: create_p...
FAILED test_nonlinear_assembly.py::test_homogenize[3-0] - TypeError: create_p...
FAILED test_nonlinear_assembly.py::test_homogenize[3-1] - TypeError: create_p...
FAILED test_nonlinear_assembly.py::test_homogenize[3-2] - TypeError: create_p...
FAILED test_rectangular_assembly.py::test_mixed_element[GhostMode.none-CellType.triangle]
FAILED test_rectangular_assembly.py::test_mixed_element[GhostMode.none-CellType.quadrilateral]
FAILED test_rectangular_assembly.py::test_mixed_element[GhostMode.shared_facet-CellType.triangle]
FAILED test_rectangular_assembly.py::test_mixed_element[GhostMode.shared_facet-CellType.quadrilateral]
FAILED test_surface_integral.py::test_surface_integrals[C++] - TypeError: __i...
FAILED test_surface_integral.py::test_surface_integral_dependency[C++] - Type...
FAILED test_vector_assembly.py::test_mpc_assembly[CellType.quadrilateral-1-master_point0-C++]
FAILED test_vector_assembly.py::test_mpc_assembly[CellType.quadrilateral-1-master_point1-C++]
FAILED test_vector_assembly.py::test_mpc_assembly[CellType.quadrilateral-2-master_point0-C++]
FAILED test_vector_assembly.py::test_mpc_assembly[CellType.quadrilateral-2-master_point1-C++]
FAILED test_vector_assembly.py::test_mpc_assembly[CellType.quadrilateral-3-master_point0-C++]
FAILED test_vector_assembly.py::test_mpc_assembly[CellType.quadrilateral-3-master_point1-C++]
FAILED test_vector_assembly.py::test_mpc_assembly[CellType.triangle-1-master_point0-C++]
FAILED test_vector_assembly.py::test_mpc_assembly[CellType.triangle-1-master_point1-C++]
FAILED test_vector_assembly.py::test_mpc_assembly[CellType.triangle-2-master_point0-C++]
FAILED test_vector_assembly.py::test_mpc_assembly[CellType.triangle-2-master_point1-C++]
FAILED test_vector_assembly.py::test_mpc_assembly[CellType.triangle-3-master_point0-C++]
FAILED test_vector_assembly.py::test_mpc_assembly[CellType.triangle-3-master_point1-C++]
FAILED test_vector_poisson.py::test_vector_possion[0-0-2-4-C++] - TypeError: ...
FAILED test_vector_poisson.py::test_vector_possion[0-0-3-4-C++] - TypeError: ...
FAILED test_vector_poisson.py::test_vector_possion[0-1-2-4-C++] - TypeError: ...
FAILED test_vector_poisson.py::test_vector_possion[0-1-3-4-C++] - TypeError: ...
FAILED test_vector_poisson.py::test_vector_possion[1-0-2-4-C++] - TypeError: ...
FAILED test_vector_poisson.py::test_vector_possion[1-0-3-4-C++] - TypeError: ...
FAILED test_vector_poisson.py::test_vector_possion[1-1-2-4-C++] - TypeError: ...
FAILED test_vector_poisson.py::test_vector_possion[1-1-3-4-C++] - TypeError: ...
============================= 72 failed in 13.77s ==============================
make[1]: *** [debian/rules:32: execute_before_dh_python3] Error 1
make[1]: Leaving directory '/build/reproducible-path/dolfinx-mpc-0.9.0'
make: *** [debian/rules:12: binary] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2