https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99711
Bug ID: 99711 Summary: Crash when reading an allocated character array in namelist Product: gcc Version: 10.2.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: fortran Assignee: unassigned at gcc dot gnu.org Reporter: phil1691 at gmail dot com Target Milestone: --- The following code crashes with a segmentation fault (gcc 10.2.0): > cat alloc_nml.f90 program allocnml implicit none character(len=:), dimension(:), allocatable :: cbulist_ru integer :: iluseg namelist /nam_bu_ru/ cbulist_ru allocate( character(len=10) :: cbulist_ru(5) ) open(newunit=iluseg, file='list.nml', status='old', & action='read', form='formatted', access='sequential') read(unit=iluseg, nml=nam_bu_ru) print *, cbulist_ru close(unit=iluseg) end program allocnml With the following namelist file: > cat list.nml &NAM_BU_RU CBULIST_RU(1) = 'PRES' CBULIST_RU(2) = 'NEST' CBULIST_RU(3) = 'HTURB' CBULIST_RU(4) = 'VTURB' / Compilation: > gfortran -g alloc_nml.f90 Execution: > ./a.out Program received signal SIGSEGV: Segmentation fault - invalid memory reference. Backtrace for this error: #0 0x146bdba3349f in ??? #1 0x146bdbb57d7a in ??? #2 0x146bdc79df4b in nml_read_obj at ../../../gcc-10.2.0-srcdir/libgfortran/io/list_read.c:3142 #3 0x146bdc79ee8a in nml_get_obj_data at ../../../gcc-10.2.0-srcdir/libgfortran/io/list_read.c:3512 #4 0x146bdc7a78b7 in finalize_transfer at ../../../gcc-10.2.0-srcdir/libgfortran/io/transfer.c:4128 #5 0x400d48 in allocnml at /home/waup/F90/bug_gcc/character_allocatable_namelist/alloc_nml.f90:14 #6 0x400e20 in main at /home/waup/F90/bug_gcc/character_allocatable_namelist/alloc_nml.f90:19 Erreur de segmentation (core dumped)