[Bug fortran/52386] New: ICE in gfc_conv_descriptor_dtyp

["reuter at physik dot uni-freiburg.de" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52386

             Bug #: 52386
           Summary: ICE in gfc_conv_descriptor_dtyp
    Classification: Unclassified
           Product: gcc
           Version: 4.6.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: reuter@physik.uni-freiburg.de


Created attachment 26755
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26755
Code triggering the ICE.

This is a regression in gfortran 4.6.x of a bug not being present in the gcc
4.5.x versions of the compiler. When compiling the 13 line of codes below I
get:
gfortran  -c cascades.f90
cascades.f90: In function ‘reduced’:
cascades.f90:11:0: internal compiler error: in gfc_conv_descriptor_dtype, at
fortran/trans-array.c:239
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

The error arises in the pack function. I did not test whether this is still be
present in gfortran 4.7.0. Here is the code:
module cascades
  implicit none
  private
contains
    function reduced (array)
      integer, dimension(:), allocatable :: reduced
      integer, dimension(:), intent(in) :: array
      logical, dimension(size(array)) :: mask
      mask = .true. 
      allocate (reduced (count (mask)))
      reduced = pack (array, mask)
    end function reduced
end module cascades

I also add the code as attachment.