[Bug fortran/52102] New: [OOP] Wrong result with ALLOCATE w/ SOURCE= and nonpoly. array constructor source-expr

["burnus at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52102

             Bug #: 52102
           Summary: [OOP] Wrong result with ALLOCATE w/ SOURCE= and
                    nonpoly. array constructor source-expr
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Keywords: wrong-code
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: burnus@gcc.gnu.org


The following program, which is an extension of
testsuite/gfortran.dg/class_48.f90 and thus PR 51972 fails to correctly set the
value via SOURCE:

  allocate (two%a(2), source=[t(4), t(6)])

Should give for two%a(1)%x and two%a(2)%x the values 4 and 6, but one gets 0 0.
If one uses not a class component but a class variable, the result is 4 0.

There is a similar PR for polymorphic sources, cf. PR 51864.


subroutine test3 ()
  type t
    integer :: x
  end type t

  type t2
    class(t), allocatable :: a(:)
  end type t2

  type(t2) :: one, two

  one = two
  if (allocated (one%a)) call abort ()

  allocate (two%a(2), source=[t(4), t(6)])
  one = two
  if (.not.allocated (one%a)) call abort ()

  print *, one%a(1)%x
  print *, one%a(6)%x
  if ((one%a(1)%x /= 4)) call abort ()
  if ((one%a(2)%x /= 6)) call abort ()

  deallocate (two%a)
  one = two
  if (allocated (one%a)) call abort ()
end subroutine test3