https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99602
--- Comment #9 from Jürgen Reuter <juergen.reuter at desy dot de> --- (In reply to Paul Thomas from comment #8) > > Paul $ gfortran -fcheck=pointer repro.f90 reuter@Manwe:~/local/packages/whizard/trunk/_build_flags/RT_20210315$ ./a.out At line 38 of file repro.f90 Fortran runtime error: Pointer actual argument 'mm' is not associated Error termination. Backtrace: #0 0x106ff6fde #1 0x106ff7c85 #2 0x106ff8256 #3 0x106fe5a9d #4 0x106fe5c8b #5 0x106fe5cc6