[Bug fortran/88248] [F18] Bogus warning about obsolescent feature: Labeled DO statement

[gscfq@t-online.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88248

--- Comment #1 from G. Steinmetz <gscfq@t-online.de> ---

For completeness, similar with outdated return labels :


$ cat z3.f90
program p
   do
      call sub (*98, *99)
   end do
98 continue
99 continue
end


$ gfortran-9-20181125 -c z3.f90 -std=f2008
z3.f90:3:24:

    3 |       call sub (*98, *99)
      |                        1
Warning: Obsolescent feature: Alternate-return argument at (1)


$ gfortran-9-20181125 -c z3.f90 -std=f2018
z3.f90:3:24:

    3 |       call sub (*98, *99)
      |                        1
Warning: Obsolescent feature: Alternate-return argument at (1)
z3.f90:5:2:

    5 | 98 continue
      |  1
Warning: Fortran 2018 obsolescent feature: Labeled DO statement at (1)
z3.f90:6:2:

    6 | 99 continue
      |  1
Warning: Fortran 2018 obsolescent feature: Labeled DO statement at (1)