Erroneous error #7281: This symbol has multiply declared DEC$ ATTRIBUTES REFERENCE{32|64] attribute with a MODULE SUBROUTINE

[FortranFan]

Fyi on a support requested at the Intel OSC:

module m

   interface
      module subroutine sub( s )
         !dir$ attributes stdcall, reference, mixed_str_len_arg :: sub
         !dir$ attributes decorate, alias:'sub' :: sub

         character(len=*), intent(in) :: s

      end subroutine sub

   end interface

end module

submodule(m) sm

contains

   module subroutine sub( s )
      !dir$ attributes stdcall, reference, mixed_str_len_arg :: sub
      !dir$ attributes decorate, alias:'sub' :: sub

      character(len=*), intent(in) :: s

      print *, s

   end subroutine sub

end submodule

and the compilation response:

C:\temp>ifort /c /standard-semantics /warn:all m.f90
Intel(R) Visual Fortran Intel(R) 64 Compiler for applications running on Intel(R
) 64, Version 18.0.1.156 Build 20171018
Copyright (C) 1985-2017 Intel Corporation. All rights reserved.

m.f90(21): error #7281: This symbol has multiply declared DEC$ ATTRIBUTES REFERE
NCE{32|64] attribute. [SUB]
!dir$ attributes stdcall, reference, mixed_str_len_arg :: sub
-------------------------------------------------------------^
compilation aborted for m.f90 (code 1)

I think the above shown error #7281: This symbol has multiply declared DEC$ ATTRIBUTES REFERENCE{32|64] attribute. _{should not occur.}  The listed attributes in the SUBMODULE with the module subroutine sub are the same as those in the ancestor module.   I believe Intel Fortran should be able to support this.

I have requested a fix for this issue.