[Bug fortran/59015] New: I/O of derived type with private component is forbidden

[fxcoudert at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59015

            Bug ID: 59015
           Summary: I/O of derived type with private component is
                    forbidden
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: fxcoudert at gcc dot gnu.org

We should diagnose and prevent I/O of a derived-type object with one or more
private components. Example:

module foo
  type, public :: t
    private
    integer :: hidden
  end type t

  type(t), parameter, public :: v = t(42)
end module foo

program test
  use foo
  print *, v
end

This currently compiles and print 42. It should be rejected.