/* A common user error is to pass the address of a 4-byte
             * int when the address of a pointer (or an address-sized int)
             * should have been used.  We can test for this specific
             * case.  Note that this code assumes sizeof(intptr_t) is
             * a power of 2. */
            if ((intptr_t) attribute_val & (sizeof(intptr_t) - 1)) {
                MPIR_ERR_SETANDSTMT(mpi_errno, MPI_ERR_ARG, goto fn_fail, "**attrnotptr");
            }