if (op_ret == -1) {
                        local->failed = 1;
                        gf_log (this->name, GF_LOG_DEBUG,
                                "%s returned error %s",
                                ((call_frame_t *)cookie)->this->name,
                                strerror (op_errno));
                        local->failed = 1;
                        local->op_errno = op_errno;
                }

in the above piece of code, the variable local->failed is set to 1 twice.