[Bug fortran/104908] [11/12/13/14 Regression] incorrect Fortran out-of-bound runtime error.

["cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104908

--- Comment #10 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-13 branch has been updated by Harald Anlauf
<anlauf@gcc.gnu.org>:

https://gcc.gnu.org/g:5741e5fc53161ccf2056e0670334ea528431feb7

commit r13-8266-g5741e5fc53161ccf2056e0670334ea528431feb7
Author: Harald Anlauf <anlauf@gmx.de>
Date:   Sat Jan 27 17:41:43 2024 +0100

    Fortran: fix bounds-checking errors for CLASS array dummies [PR104908]

    Commit r11-1235 addressed issues with bounds of unlimited polymorphic array
    dummies.  However, using the descriptor from sym->backend_decl does break
    the case of CLASS array dummies.  The obvious solution is to restrict the
    fix to the unlimited polymorphic case, thus keeping the original descriptor
    in the ordinary case.

    gcc/fortran/ChangeLog:

            PR fortran/104908
            * trans-array.cc (gfc_conv_array_ref): Restrict use of transformed
            descriptor (sym->backend_decl) to the unlimited polymorphic case.

    gcc/testsuite/ChangeLog:

            PR fortran/104908
            * gfortran.dg/pr104908.f90: New test.

    (cherry picked from commit ce61de1b8a1bb3a22118e900376f380768f2ba59)