[Bug fortran/51864] New: [OOP] ALLOCATE with polymorphic array constructor as SOURCE=

[burnus at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51864

             Bug #: 51864
           Summary: [OOP] ALLOCATE with polymorphic array constructor as
                    SOURCE=
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: burnus@gcc.gnu.org


See also http://gcc.gnu.org/ml/fortran/2012-01/msg00147.html

The following program causes gfortran to ICE with a segfault. The program
compiles with NAG f95 5.1 and crayftn 7.1 - though it segfaults at run time.

I think the program is valid F2003/F2008.

type t
  integer :: i = 5
end type t
type, extends(t) :: t2
  integer :: j = 6
end type t2

class(t), allocatable :: a(:), b(:), c(:)
allocate(t2 :: a(3))
allocate(t2 :: b(5))
!allocate(c, source=[ a, b ]) ! F2008, PR 44672
allocate(c(8), source=[ a, b ])
! c = [ a, b ] ! F2008, PR 43366
select type(c)
  type is(t)
    print '(8(i2))', c%i
  type is(t2)
    print '(8(i2))', c%i
    print '(8(i2))', c%j
end select
end