奇怪， 在构造函数里面初始化竟然出现异常

#ifndef MY_OPTION_H#define MY_OPTION_H#include <QWidget>class QLineEdit;class QLabel;class QPushButton;class My_option : public QWidget{    Q_OBJECTpublic:    explicit My_option(QWidget *parent = 0);protected:        QLabel    *label1;        QLabel    *label2;        QLineEdit *le_min;        QLineEdit *le_max;        QPushButton *certain_button;        int imin;        int imax;signals:    public slots:    };#endif // MY_OPTION_H

#include <QPushButton>#include <QLineEdit>#include <QLabel>#include <QRegExpValidator>#include <QRegExp>#include "my_option.h"My_option::My_option(QWidget *parent) :    QWidget(parent){        imin = 1;              //初始化这2个竟然程序会出现错误： 程序已经停止        imax = 100;        this->setFixedSize(400, 200);        label1 = new QLabel(tr("range : "), this);        label2 = new QLabel(tr("    --   "), this);        label1->setFixedSize(60, 32);        label2->setFixedSize(60, 32);        le_min = new QLineEdit(this);        le_max = new QLineEdit(this);        le_min->setFixedSize(60, 32);        le_max->setFixedSize(60, 32);        label1->move(40, 40);        le_min->move(100, 40);        label2->move(160, 40);        le_max->move(220, 40);        QRegExp enter_num("[0-9]{1,4}");        QRegExpValidator *le_validator = new QRegExpValidator(enter_num, this);        le_min->setValidator(le_validator);        le_max->setValidator(le_validator);        certain_button = new QPushButton(tr("yes"), this);        certain_button->setFixedSize(60, 32);        certain_button->move(280 ,120);}