Re: [PATCH] Fortran: fix passing of optional dummies to bind(c) procedures [PR113866]

[Harald Anlauf <anlauf@gmx.de>]

Am 13.02.24 um 19:13 schrieb Harald Anlauf:
> indeed the new testcase just regressed due to commit
> r14-8947-g6caec7d9ec37e6 ... :-(
>
> Reduced testcase which fails on trunk:
>
> program p
>    implicit none
>    integer, parameter :: n = 100, l = 10
>    character(l) :: a = 'a234567890', b(n) = 'bcdefghijk'
>    character(:), allocatable :: d, e(:)
>    allocate (d, source=a)
>    allocate (e, source=b)
>    print *, len (d), len (e), size (e)
>    call not_bindc_optional_deferred (d, e)
>    deallocate (d, e)
> contains
>    subroutine not_bindc_optional_deferred (c5, c6)
>      character(:), allocatable, optional :: c5, c6(:)
>      if (.not. present (c5) .or. .not. present (c6)) stop 6
>      print *, len (c5), len (c6), size (c6)
>      if (len (c5) /= l .or. len (c6) /= l) stop 84
>    end
> end
>
> Expected:
>
>            10          10         100
>            10          10         100
>
> After above commit:
>
>            10          10         100
>            10           0         100
> STOP 84

This is now tracked as::

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113911

> Will have to wait until the cause is found and fixed...

As it is sufficient to disable the deferred-length test,
I've done that and pushed the amended patch as

https://gcc.gnu.org/g:f4935df217ad89f884f908f39086b322e80123d0

Thanks,
Harald