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QStateMachine segmentation fault



  • Hi guys,

    I've been using QStateMachine to controll a machine process. This is the code:

    this->dispenserCycleFsm = new QStateMachine(this);
    
        //general dispenser state machine
        LOGINFO("Inizializzazione macchina a stati del dispenser");
    
        cycling=new DispenserState(tr("cycling"),dispenserData);
        stopped = new QFinalState();
        finished = new QFinalState();
        /*
        stopped = new DispenserFinalState(tr("stopped"),dispenserData);
        finished = new DispenserFinalState(tr("finished"),dispenserData);
        */
        cycling_movingRequest=new TurnstileMovingState(tr("moving request"),dispenserData,cycling);
        cycling_fcInCheckDelay = new TimerState(tr("fcIn check delay"),Params::Instance()->CYCLE_FCIN_DELAY,dispenserData,cycling);
        cycling_waitingFcIn=new TurnstileStoppedOnExit(tr("waitingFcIn"),dispenserData,cycling);
        cycling_waitProductOut=new DispenserState(tr("waitProductOut"),dispenserData,cycling);
        cycling->setInitialState(cycling_movingRequest);
    
    
        connect(stopped,SIGNAL(stateChanged(QString)),this,SLOT(setDispenserStateString(QString)));
        connect(cycling_movingRequest,SIGNAL(stateChanged(QString)),this,SLOT(setDispenserStateString(QString)));
        connect(cycling_fcInCheckDelay,SIGNAL(stateChanged(QString)),this,SLOT(setDispenserStateString(QString)));
        connect(cycling_waitingFcIn,SIGNAL(stateChanged(QString)),this,SLOT(setDispenserStateString(QString)));
        connect(cycling_waitProductOut,SIGNAL(stateChanged(QString)),this,SLOT(setDispenserStateString(QString)));
        connect(finished,SIGNAL(stateChanged(QString)),this,SLOT(setDispenserStateString(QString)));
    
        //condizioni di stop
        cycling->addTransition(new SignalTransition("",this,SIGNAL(stopTurnstile()),stopped));
        connect(stopped,SIGNAL(entered()),this,SLOT(cycleStop()));
    
        cycling_movingRequest->addTransition(new OutputOnTransition(dispenserData.hwBoardAddress,dispenserData.motorOut,"out on",cycling_fcInCheckDelay));
        cycling_fcInCheckDelay->addTransition(new SignalTransition("",cycling_fcInCheckDelay,SIGNAL(triggerd()),cycling_waitingFcIn));
        cycling_waitingFcIn->addTransition(new InputOnTransition(dispenserData.hwBoardAddress,dispenserData.fcIn,"fc on",cycling_waitProductOut));
    
        cycling_waitProductOut->addTransition(new InputOffTransition(dispenserData.vuBoardAddress,dispenserData.outputFcIn," out fc off",finished));
        cycling_waitProductOut->addTransition(new InputOffTransition(dispenserData.vuBoardAddress2,dispenserData.outputFcIn2," out fc off",finished));
        cycling_waitProductOut->addTransition(new SignalTransition("",this,SIGNAL(forceCycleEnd()),finished));
    
        connect(cycling_waitProductOut,SIGNAL(entered()),this,SLOT(checkForceCycleEnd()));
    
        connect(finished,SIGNAL(entered()),this,SLOT(cycleEnd()));
    
        dispenserCycleFsm->addState(stopped);
        dispenserCycleFsm->addState(cycling);
        dispenserCycleFsm->addState(finished);
        dispenserCycleFsm->setInitialState(cycling);
    

    but sometimes I have a segmentation fault when the QFinalState is reached.

    Segmentation Stack Trace

    I'm using qt 4.8.

    Thanks to all


  • Lifetime Qt Champion

    Hi,

    You should run your application and then post the backtrace here.


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