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From: "songtao.thu at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/58883] New: Segmentation fault when reshaping  a allocatable array to allocatable function
Date: Fri, 25 Oct 2013 20:39:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58883

            Bug ID: 58883
           Summary: Segmentation fault when reshaping  a allocatable array
                    to allocatable function
           Product: gcc
           Version: 4.8.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: songtao.thu at gmail dot com

When I reshape a allocatable array to allocatable function output, segmentation
fault appears.

Test Case1:

program main
  implicit none

  print *, foo()
contains
  function foo()
    integer, allocatable  :: foo(:,:)
    integer, allocatable  :: temp(:)

    temp = [1,2,3,4,5,6,7,8]
    foo = reshape(temp,[2,4])
  end function
end program

However, test case2 works fine:

program main
  implicit none

  print *, foo()
contains
  function foo()
    integer, allocatable  :: foo(:,:)
    integer, allocatable  :: temp(:), temp2(:,:)

    temp = [1,2,3,4,5,6,7,8]
    temp2 = reshape(temp,[2,4])
    foo = temp2            ! or call move_alloc(temp2,foo)
  end function
end program

Hopefully someone can figure it out.

Tao Song