奇怪的多线程调试。gdb调试2个线程，F10几十次后，崩溃了，报错。贴上源码。
新建的工程，就只是建了2个线程，并且2个线程在运行。对2个线程需要进入的函数MainWindow::TestThread1()、MainWindow::TestThread2()设了断点，按F10几十次后，程序就报“底层由于接收到操作系统的信号而停止，信号名称：SIGSEGV 信号含义：Segmentation fault”。源码：

MainWindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QMutex>
#include "cthread1.h"
#include "cthread2.h"

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT
    
public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();

public:
    int TestThread1();
    int TestThread2();
    
private:
    Ui::MainWindow *ui;

    QMutex m_mutex1;
    QMutex m_mutex2;

    CThread1 thread1;
    CThread2 thread2;
};

#endif // MAINWINDOW_H

MainWindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow),
    m_mutex1(QMutex::Recursive),
    m_mutex2(QMutex::Recursive),
    thread1(this),
    thread2(this)
{
    ui->setupUi(this);

    thread1.start();
    thread2.start();
}

MainWindow::~MainWindow()
{
    delete ui;
}

int MainWindow::TestThread1()
{
    QMutexLocker locker(&m_mutex1);

    static int a = 0;
    a++;
    return a;
}

int MainWindow::TestThread2()
{
    QMutexLocker locker(&m_mutex2);

    static int a = 0;
    a++;
    return a;
}

CThread1.cpp

#include "cthread1.h"
#include "mainwindow.h"

CThread1::CThread1(QObject *parent) :
    QThread(parent)
{
}

void CThread1::run()
{
    while(true)
    {
        MainWindow* w = (MainWindow*)this->parent();
        w->TestThread1();

        msleep(200);
    }
}

CThread2.cpp

#include "cthread2.h"
#include "mainwindow.h"

CThread2::CThread2(QObject *parent) :
    QThread(parent)
{
}

void CThread2::run()
{
    while(true)
    {
        MainWindow* w = (MainWindow*)this->parent();
        w->TestThread2();

        msleep(200);
    } 
 
}

[解决办法]
是这样的,多线程的环境一般不建议断点调试,否则会出现错误.
这个代码如果非调试状态,会有问题吗?