[Bug fortran/95037] New: gfortran fails to compile a simple subroutine, issues an opaque message

[longb at cray dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95037

            Bug ID: 95037
           Summary: gfortran fails to compile a simple subroutine, issues
                    an opaque message
           Product: gcc
           Version: 9.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: longb at cray dot com
  Target Milestone: ---

> cat  test.f90
subroutine my_random_seed_v (size, put, get)
integer, optional :: size
integer, optional :: put(1)
integer, optional :: get(1)
call random_seed (size, put, get)
end subroutine my_random_seed_v

Works with Cray compiler:

> ftn -c test.f90
> module swap PrgEnv-cray PrgEnv-gnu

Fails with gfortran:

> gfortran -c test.f90

(null):0: confused by earlier errors, bailing out
> gfortran --version
GNU Fortran (GCC) 9.3.0 20200312 (Cray Inc.)
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Original user was "confused" by the message, especially since there were no
"earlier errors" output.