It seems one case in Intergration Test sometimes works incorrectly

[Critsium-xy]

Describe the Testing Issue

This case may cause Segfault randomly. It happens at a very small chance and will disappear if you rerun the test.

Or maybe one certain machine used for testing cannot work properly?

[Critsium-xy]

The biggest problem is that this is not reproduceable! If any developers happen to meet the same problem, please leave your comment.

[Critsium-xy]

I am experiencing testing issues recently if compiled with BUILD_TESTING=ON. Wondering if it relates to this. My message reads:

...
[ 28%] Building CXX object source/module_base/grid/test/CMakeFiles/test_delley.dir/test_delley.cpp.o
[ 28%] Building CXX object source/module_base/grid/test/CMakeFiles/test_delley.dir/__/delley.cpp.o
[ 28%] Building CXX object source/module_base/grid/test/CMakeFiles/test_radial.dir/test_radial.cpp.o
[ 28%] Building CXX object source/module_base/grid/test/CMakeFiles/test_delley.dir/__/__/ylm.cpp.o
/usr/bin/ld: /opt/intel/oneapi/mkl/2025.0/lib/libmkl_blacs_intelmpi_lp64.so: undefined reference to `mkl_serv_print'
/usr/bin/ld: /opt/intel/oneapi/mkl/2025.0/lib/libmkl_blacs_intelmpi_lp64.so: undefined reference to `MKL_calloc'
/usr/bin/ld: /opt/intel/oneapi/mkl/2025.0/lib/libmkl_blacs_intelmpi_lp64.so: undefined reference to `mkl_serv_iface_malloc'
/usr/bin/ld: /opt/intel/oneapi/mkl/2025.0/lib/libmkl_blacs_intelmpi_lp64.so: undefined reference to `MKL_free'
/usr/bin/ld: /opt/intel/oneapi/mkl/2025.0/lib/libmkl_blacs_intelmpi_lp64.so: undefined reference to `mkl_serv_vsprintf_s'
/usr/bin/ld: /opt/intel/oneapi/mkl/2025.0/lib/libmkl_blacs_intelmpi_lp64.so: undefined reference to `MKL_malloc'
/usr/bin/ld: /opt/intel/oneapi/mkl/2025.0/lib/libmkl_blacs_intelmpi_lp64.so: undefined reference to `mkl_serv_get_mpi_wrappers'
/usr/bin/ld: /opt/intel/oneapi/mkl/2025.0/lib/libmkl_blacs_intelmpi_lp64.so: undefined reference to `mkl_serv_iface_free'
[ 28%] Building CXX object source/module_base/grid/test/CMakeFiles/test_radial.dir/__/radial.cpp.o
collect2: error: ld returned 1 exit status
make[2]: *** [source/module_base/test_parallel/CMakeFiles/blacs_connector.dir/build.make:115: source/module_base/test_parallel/blacs_connector] Error 1
make[1]: *** [CMakeFiles/Makefile2:4536: source/module_base/test_parallel/CMakeFiles/blacs_connector.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
[ 29%] Linking CXX executable test_delley
[ 29%] Linking CXX executable test_radial
[ 29%] Built target test_delley
[ 29%] Built target test_radial
[ 29%] Built target parallel_2d_test
make: *** [Makefile:146: all] Error 2

This is not the same problem. You problem happens when you are trying to build, but this problem happens when running tests. This is maybe just your build settings are not correct, or build with testing need extra configuration? I also met this before. Maybe @Cstandardlib knows why.

[Critsium-xy]

I met this problem again. I really suspect that this case is not good enough.

[mohanchen]

PR 6122 has fixed this issue. Thanks for proposing the issue!!