[Bug fortran/79230] [7 Regression] [OOP] Run time error: double free or corruption

[janus at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79230

--- Comment #12 from janus at gcc dot gnu.org ---
(In reply to Dominique d'Humieres from comment #3)
> The problem seems located to the file evaluators_uti.f90 and occurred
> between revisions  r243430 (2016-12-08, OK) and r243621 (2016-12-13,
> segfault).

Looking at the ChangeLog, I see two entries in this range that sound like they
could be related:


r243483:
2016-12-09  Janus Weil  <janus@gcc.gnu.org>

        PR fortran/61767
        * class.c (has_finalizer_component): Fix this function to detect only
        non-pointer non-allocatable components which have a finalizer.


r243480:
2016-12-09  Andre Vehreschild  <vehre@gcc.gnu.org>

        * trans-array.c (gfc_array_deallocate): Remove wrapper.
        (gfc_trans_dealloc_allocated): Same.
        (structure_alloc_comps): Restructure deallocation of (nested)
        allocatable components.  Insert dealloc of sub-component into the block
        guarded by the if != NULL for the component.
        (gfc_trans_deferred_array): Use the almightly deallocate_with_status.
        * trans-array.h: Remove prototypes.
        * trans-expr.c (gfc_conv_procedure_call): Use the almighty deallocate_
        with_status.
        * trans-openmp.c (gfc_walk_alloc_comps): Likewise.
        (gfc_omp_clause_assign_op): Likewise.
        (gfc_omp_clause_dtor): Likewise.
        * trans-stmt.c (gfc_trans_deallocate): Likewise.
        * trans.c (gfc_deallocate_with_status): Allow deallocation of scalar
        and arrays as well as coarrays.
        (gfc_deallocate_scalar_with_status): Get the data member for coarrays
        only when freeing an array with descriptor.  And set correct caf_mode
        when freeing components of coarrays.
        * trans.h: Change prototype of gfc_deallocate_with_status to allow
        adding statements into the block guarded by the if (pointer != 0) and
        supply a coarray handle.


I need to take a closer look to see which of those two (if any) is the culprit.