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Compiler ignores statement with syntax error

 
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mecej4



Joined: 31 Oct 2006
Posts: 1884

PostPosted: Mon Mar 09, 2020 5:34 pm    Post subject: Compiler ignores statement with syntax error Reply with quote

FTN95 8.51 exhibits a strange behavior when one mistakenly types ":=" instead of "=" (old Algol/Pascal assignment operator). Versions 8.4 and earlier flagged the line as erroneous, but Version 8.51 treats it as a comment line.

Code:
program weird
implicit none
integer :: i = 25
!
i := i + i
print *,i
end program


With Version 8.51, the output is
Code:
           25


The listing of the program shows the instruction address remaining unchanged on this erroneous line:
Code:
   0001   program weird                                                                          AT 0
   0002   implicit none                                                                          AT 20
   0003   integer :: i = 25                                                                      AT 20
   0004   !                                                                                      AT 20
   0005   i := i + i                                                                             AT 20
   0006   print *,i                                                                              AT 20
   0007   end program                                                                            AT 70
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PaulLaidler
Site Admin


Joined: 21 Feb 2005
Posts: 7912
Location: Salford, UK

PostPosted: Tue Mar 10, 2020 9:00 am    Post subject: Reply with quote

mecej4

Thanks for the feedback. I have logged this as a bug.
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PaulLaidler
Site Admin


Joined: 21 Feb 2005
Posts: 7912
Location: Salford, UK

PostPosted: Wed Mar 11, 2020 4:08 pm    Post subject: Reply with quote

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