[Bug fortran/82065] New: gfortran rejects redundant use of intrinsic module constant

[damian at sourceryinstitute dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82065

            Bug ID: 82065
           Summary: gfortran rejects redundant use of intrinsic module
                    constant
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: damian at sourceryinstitute dot org
  Target Milestone: ---

gfortran 6, 7, and 8 generate compiler error messages when a variable in the 
iso_fortran_env intrinsic model is accessed via use association where it is
also available via host association:

$ cat use-intrinsic-module-twice.f90 
  use iso_fortran_env
  implicit none
  print *, integer_kinds
  call testsub
contains
  subroutine testsub
    use iso_fortran_env
    print * , integer_kinds
  end subroutine
end

$ gfortran use-intrinsic-module-twice.f90 
/tmp/ccoAKOqk.s: Assembler messages:
/tmp/ccoAKOqk.s:134: Error: symbol `__iso_fortran_env_MOD_integer_kinds' is
already defined

$ gfortran --version
GNU Fortran (GCC) 8.0.0 20170731 (experimental)