hello je voudrais additionner des QStringLiSt et récupérer un pointeur sur la liste résultat

le code suivant me renvoie une erreur de segmentation

void Setup::buildParamList(QStringList *stage,QStringList *fx,
								QStringList *anim1,QStringList *anim2)
{
	
	QStringList *unLayer= new QStringList;
	std::cout<<"build Param list new layerString"<<std::endl;
	*unLayer=*anim1+*anim2;
	std::cout<<"build Param list new unlayer "<<std::endl;
	*m_paramList+=*stage;
	*m_paramList+=*fx;
	
	
	
	std::cout<<"build Param operator"<<std::endl;
	
	int i=0;
	for (i=1;i<=m_nbLayers;i++)
	{
		*m_paramList+=*unLayer;
		std::cout<<"build Param list for layerString"<<std::endl;
	}
	
	std::cout<<"build Param list ok"<<std::endl;
	emit changeAppend();
}

le .h

#ifndef SETUP_H_
#define SETUP_H_

#include <QtGui>
#include <iostream>
#include "TableauDmx.h"

#include "ui_setup.h"

class Setup :public QDialog , private Ui::Setup
{
	Q_OBJECT
	
public:
	Setup();
	
public slots:
	void setAdress(int);
	void setNbLayers(int);
	void readSettings();
	void writeSettings();
	void setStageShift(QStringList *stage);
	void setFxShift(QStringList *fx);
	void setAnim1Shift(QStringList *anim1);
	void setAnim2Shift(QStringList *anim2);
	void buildParamList(QStringList *stage,QStringList *fx,
									QStringList *anim1,QStringList *anim2);
	int getAdresse() const;
	int getNbLayers() const;
	QStringList* getStageList() const;
	QStringList* getFxList() const;
	QStringList* getAnim1List() const;
	QStringList* getAnim2List() const;
	QStringList* getParamList() const;
	int getTotalSize();
	
	
signals:
	void changeAppend();
	void nbLayers(int);

private:
	void closeEvent(QCloseEvent *event);
	int m_adresse;
	int m_nbLayers;
	QStringList *m_stage;
	int m_stageShift;
	QStringList *m_fx;
	int m_fxShift;
	QStringList *m_anim1;
	int m_anim1Shift;
	QStringList *m_anim2;
	int m_anim2Shift;
	int m_totalSize;
	QStringList *m_paramList;
	
	
};

#endif /*SETUP_H_*/

qu'est ce que je n'ai pas compris ?

merci