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Puzzling error message: Colon found where not expected

 
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mecej4



Joined: 31 Oct 2006
Posts: 1886
PostPosted: Wed Feb 07, 2024 1:41 pm    Post subject: Puzzling error message: Colon found where not expected Reply with quote
The following test subroutine is compiled fine by FTN95 8.95 with or without /64, and by FTN95 9.0 with or without /64.

Code:
subroutine gcgris(ap,rr)
   
   implicit none
   real, dimension(:,0:), intent(in) :: ap
   real, dimension(:), intent(in)    :: rr
   
   real alpha,delta(0:5)
   integer l, nbn
   
   l = 0
   nbn = 5
   delta(l) = dot_product(ap(1:nbn,l),ap(1:nbn,l))
   alpha = DOT_PRODUCT(rr(1:nbn),ap(1:nbn,l))/delta(l)
   print *,l,alpha,delta(l)
   return

end subroutine


However, with /64 /opt, FTN95 9.0 gives a puzzling error message:

"ERROR T:\HST3D\hst3d-2.2\hst\src\salbug\xcolon.F90 13: Colon found where not expected"

That pertains to the line "alpha = ..."
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PaulLaidler
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Joined: 21 Feb 2005
Posts: 7926
Location: Salford, UK
PostPosted: Wed Feb 07, 2024 3:55 pm    Post subject: Reply with quote
mecej4

Many thanks for the feedback.

This failure has been fixed for the next release of FTN95. A temporary work-around is to add /inhibit_opt 96.

This new optimisation for DOT_PRODUCT can not be used on line 13 of this code and FTN95 will detect this in future.
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