[Bug fortran/125383] [14/15/16/17 Regression] Optional dummy procedure called from contained subprogram results in linking error

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125383

--- Comment #3 from Harald Anlauf <anlauf at gcc dot gnu.org> ---
Observation: the module m.mod contains

6 'parg' '' '' 5 ((PROCEDURE UNKNOWN-INTENT DUMMY-PROC BODY UNKNOWN 0 0
EXTERNAL OPTIONAL DUMMY SUBROUTINE PROCEDURE ARRAY_OUTER_DEPENDENCY) ()

for the working version, and

6 'parg' '' '' 5 ((PROCEDURE UNKNOWN-INTENT UNKNOWN-PROC BODY UNKNOWN 0
0 EXTERNAL OPTIONAL DUMMY SUBROUTINE PROCEDURE ARRAY_OUTER_DEPENDENCY) ()

Somehow the present(parg) seems to change the attribute DUMMY-PROC to
UNKNOWN-PROC.