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Incorrect detection of Missing Optional argument

 
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davidb



Joined: 17 Jul 2009
Posts: 560
Location: UK

PostPosted: Sat Jan 29, 2022 2:41 pm    Post subject: Incorrect detection of Missing Optional argument Reply with quote

When compiled with /checkmate turned on (version 8.80), the following code gives a run-time error. "Reference through missing OPTIONAL argument".

(It worked fine with 8.70)

However, the code is correct and works OK with NAG and gfortran compilers.


Code:

module mmm
contains
   subroutine xxx(m, a, b)
      integer m
      double precision, optional :: a(:), b(:)
      print *, m, a
   end subroutine

   subroutine yyy(m, a, b)
      integer m
      double precision, optional :: a(:), b(:)
      ! This call is valid even if a and/or b not provided
      call xxx(m, a, b)
   end subroutine

   subroutine caller(func)
      interface
         subroutine func(m, a, b)
            integer m
            double precision, optional :: a(:), b(:)
         end subroutine
      end interface
      call func(1, (/1.0d0, 1.0d0/))
   end subroutine
end module

program anon
use mmm
call caller(yyy)
end

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Programmer in: Fortran 77/95/2003/2008, C, C++ (& OpenMP), java, Python, Perl
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PaulLaidler
Site Admin


Joined: 21 Feb 2005
Posts: 7378
Location: Salford, UK

PostPosted: Sun Jan 30, 2022 8:55 am    Post subject: Reply with quote

Thank you for the bug report which I have logged for investigation.
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PaulLaidler
Site Admin


Joined: 21 Feb 2005
Posts: 7378
Location: Salford, UK

PostPosted: Thu Feb 10, 2022 11:28 am    Post subject: Reply with quote

This regression has now been fixed for the next release of FTN95.
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