c++ compiling error

QString strOne = QString::fromLocal8Bit(name);
    qDebug() << Q_FUNC_INFO << "Received name =  " << strOne << "  ;";
    //rtapi_print_msg(RTAPI_MSG_DBG, "setting signal '%s'\n", name);
    /* get mutex before accessing shared data */
    rtapi_mutex_get(&(hal_data->mutex));
    qDebug() << Q_FUNC_INFO << "hal_data_mutex name =  " << strOne << "  ;";
    /* search signal list for name */
    sig = halpr_find_sig_by_name(name);
    qDebug() << Q_FUNC_INFO << "halpr_find_sig_by_name name =  " << strOne << " sig value = " << sig << "  ;";

Issuing EMC_TRAJ_SET_G92 --      (  +227,+424,    +0,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,)
Issuing EMC_TRAJ_SET_ROTATION --      (  +226,+360,    +0,0.000000,)
void MainWindow::toggleBnt_hal(bool) name Toggle received  : "hal_cmd_3"
int do_sets_cmd(char*, char*) Received name =   "hal_cmd_3"   ;[color=#e74c3c] /* these is the last mark before rtapi call */[/color]
/usr/bin/linuxcnc: line 955: 135813 Segmentation fault      (core dumped) $EMCDISPLAY -ini "$INIFILE" $EMCDISPLAYARGS $EXTRA_ARGS
Shutting down and cleaning up LinuxCNC...
task: 0 cycles, min=0.000002, max=0.012565, avg=-1.000000, 0 latency excursions (> 10x expected cycle time of 0.010000s)
Note: Using POSIX realtime