以下 Fortran 代码有什么问题？ (gfortran) (1) 处的 DTIO 虚拟参数必须是一个假定形状数组

Question

我有以下代码：

module scheme

  type, abstract :: scheme_object
   contains
     procedure, pass :: generic_scheme_print => print_scheme_object
     generic, public :: write (formatted) => generic_scheme_print
  end type scheme_object

  abstract interface
     subroutine packageable_procedure(  )
       import scheme_object
     end subroutine packageable_procedure
  end interface
contains

  subroutine print_scheme_object(this, unit, iotype, v_list, iostat, iomsg)
    class(scheme_object), intent(in) :: this
    integer, intent(in)         :: unit
    character(*), intent(in)    :: iotype
    integer, intent(in)         :: v_list (:)
    integer, intent(out)        :: iostat
    character(*), intent(inout) :: iomsg
    iostat = 1
  end subroutine print_scheme_object

  subroutine packaged_cons( )
  end subroutine packaged_cons

  function make_primitive_procedure_object( proc1 ) result( retval )
    class(scheme_object), pointer :: retval
    procedure(packageable_procedure), pointer :: proc1
  end function make_primitive_procedure_object


  subroutine ll_setup_global_environment()
    procedure(packageable_procedure), pointer :: proc1
    class(scheme_object), pointer :: proc_obj_to_pack
    proc1 => packaged_cons
    proc_obj_to_pack => make_primitive_procedure_object( proc1 )
  end subroutine ll_setup_global_environment

end module scheme

program main
end program main

这段代码在 ifort 19.1.1.217 20200306 上编译良好，运行但什么也不做（如预期的那样）。

但是，使用 gfortran 编译它失败并显示一条神秘的错误消息：

   16 |   subroutine print_scheme_object(this, unit, iotype, v_list, iostat, iomsg)
      |                                                           1
Error: DTIO dummy argument at (1) must be an ASSUMED SHAPE ARRAY

将 "v_list" 声明的长度更改为任何整数会产生两条相同的消息：

   16 |   subroutine print_scheme_object(this, unit, iotype, v_list, iostat, iomsg)
      |                                                           1
Error: DTIO dummy argument at (1) must be an ASSUMED SHAPE ARRAY

   16 |   subroutine print_scheme_object(this, unit, iotype, v_list, iostat, iomsg)
      |                                                           1
Error: DTIO dummy argument at (1) must be an ASSUMED SHAPE ARRAY

问题出在哪里？

Answer 1

我不确定这是否是一个正确的答案，但是...

您的代码是正确的，但暴露了特定编译器中的错误。

以下 Fortran 代码有什么问题？ (gfortran) (1) 处的 DTIO 虚拟参数必须是一个假定形状数组

What's wrong with the following Fortran code? (gfortran) DTIO dummy argument at (1) must be an ASSUMED SHAPE ARRAY

fortran

compiler-errors

gfortran