https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48298
--- Comment #18 from Walter Spector <w6ws at earthlink dot net> ---
Awesome!
I have noticed one bug so far. The compiler is missing a check to see if the
arguments in the I/O procedures have the 'optional' attribute. It is allowing
the attribute - even though it is illegal. E.g. the following should be
flagged as erroneous:
SUBROUTINE pwf (dtv,unit,iotype,vlist,iostat,iomsg)
! argument definitions
CLASS(person), INTENT(IN) :: dtv
INTEGER, INTENT(IN), OPTIONAL :: unit
CHARACTER (LEN=*), INTENT(IN), OPTIONAL :: iotype
INTEGER, INTENT(IN), OPTIONAL :: vlist(:)
INTEGER, INTENT(OUT), OPTIONAL :: iostat
CHARACTER (LEN=*), INTENT(INOUT), OPTIONAL :: iomsg
...
Walter
