Re: [Patch, fortran] PR126909 - Lost statement label in a program with a CONTAINS section

On 8/20/26 03:12, Paul Richard Thomas wrote:
> Please find attached a rather trivial fix for this PR.
> 
> The patch passes regression testing on FC44/x86_64. OK for mainline?
> 
> Paul

Paul,

Thanks for the patch, but I fear it's a bit more
complicated.  The patch only treats a labeled
'end program' statement, but I think it needs to
deal with additional 'branch target statements'
(F2018, 3.18).  That is, it needs to also consider
things like

subroutine lost()
    call sub()
    goto 11
    contains
       subroutine sub()
          goto 10
  10       return
       end subroutine sub
11 end subroutine lost

and, it needs to catch invalid labels such as

    F2018, 6.2.5 Statement labels
    ...
    The same statement label shall not be given to more than
    one statement in its scope.

subroutine lost()
    call sub()
    goto 10
    contains
       subroutine sub()
          goto 10
10       return
       end subroutine sub
10 end subroutine lost

-- 
steve