Public bug reported: The problem description can be found in many places over the internet, e.g. here: http://numericalnoob.blogspot.fi/2012/08/fortran-allocatable-arrays-and-pointers.html When debugging simple program
program test integer, parameter :: ndata = 8, ndim = 2 real :: my_stack(ndata) real, allocatable, target:: my_heap(:) real, pointer:: my_ptr(:,:,:) allocate(my_heap(ndata)) ! read stuff do i=1,ndata my_stack(i) = real(i) end do my_heap = my_stack my_ptr(1:ndim,1:ndim,1:ndim) => my_heap write(*,*) my_stack write(*,*) my_heap write(*,*) my_ptr end program test With gdb from distro (GNU gdb (Ubuntu 7.7-0ubuntu3) 7.7) I get: .... Breakpoint 1, test () at test.f90:13 13 write(*,*) my_stack (gdb) p my_stack $1 = (1, 2, 3, 4, 5, 6, 7, 8) (gdb) p my_heap $2 = (0) (gdb) p my_ptr $3 = (( ( 0) ) ) (gdb) With properly compiled gdb on another computer (GNU gdb (GDB) SUSE (7.5.1-0.7.29)) i get .... Breakpoint 1, test () at test.f90:13 13 write(*,*) my_stack (gdb) p my_stack $1 = (1, 2, 3, 4, 5, 6, 7, 8) (gdb) p my_heap $2 = (1, 2, 3, 4, 5, 6, 7, 8) (gdb) p my_ptr $3 = (( ( 1, 2) ( 3, 4) ) ( ( 5, 6) ( 7, 8) ) ) (gdb) ** Affects: gdb (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1315634 Title: gdb does not show heap arrays in fortran To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdb/+bug/1315634/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs