Dear All, This patch does four things: (i) On deallocating class components, the vptr is set to point to the vtable of the declared type; (ii) When digging out the last class reference, a NULL is returned if the allocatable component is to the right of a part reference with non-zero rank, so that the resulting ICE is removed. The previous modification takes care of these cases for gfc_reset_vptr and gfc_reset_len; (iii) gfc_reset_vptr has been simplified by the use of gfc_get_vptr_from_expr; and (iv) All variable expressions for the source are passed to gfc_trans-assignment, so that array sections work correctly.
I see that Andre has already reserved the testcase allocate_with_source_10, for the pending patch that I undertook to review, so I will change this to #12 on submission OK for trunk? Cheers Paul 2015-01-24 Paul Thomas <pa...@gcc.gnu.org> PR fortran/67171 * trans-array.c (structure_alloc_comps): On deallocation of class components, reset the vptr to the declared type vtable and reset the _len field of unlimited polymorphic components. *trans-expr.c (gfc_find_and_cut_at_last_class_ref): Bail out on allocatable component references to the right of part reference with non-zero rank and return NULL. (gfc_reset_vptr): Simplify this function by using the function gfc_get_vptr_from_expr. Return if the vptr is NULL_TREE. (gfc_reset_len): If gfc_find_and_cut_at_last_class_ref returns NULL return. * trans-stmt.c (gfc_trans_allocate): Rely on the use of gfc_trans_assignment if expr3 is a variable expression since this deals correctly with array sections. 2015-01-24 Paul Thomas <pa...@gcc.gnu.org> PR fortran/67171 * gfortran.dg/allocate_with_source_10.f03: New test