[Bug fortran/126234] [17 Regression] gfortran reject SPEC CPU wrf and wrf_r since r17-2320-gf935a7a9013d07

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126234

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Maybe there's 'a1' in two USEd modules but never actually referenced (so the
ambiguity is harmless).  Sth like

module A
    integer x
end
module B
    integer x
end
program bar
    USE A
    USE B
end

(this doesn't seem to fail)