Written in the terminate exit the program crashes, sometimes a test code, directly on the code, point close program occasionally collapse, in this I ask you who help analysis to see see!

 class m_work: public QObject {
Q_OBJECT 


Public: 
M_work (parent QObject *=nullptr) {

Xdebug & lt; <"M_work" & lt; 

} 
~ m_work () {

} 

Q_SLOT 
Void m_slot (void) {

Xdebug & lt; <"M_slot" & lt; QThread: : msleep (5000); 
Xdebug & lt; <"Sleep end" & lt; 
} 

Private: 




}; 

The class MainWindow: public QMainWindow 
{
Q_OBJECT 

Public: 
MainWindow (QWidget * parent=nullptr); 
~ MainWindow (); 

Private slots: 
Void on_btn_close_released (); 

Void on_btn_open_released (); 

Signals: 
Void sig (); 

Private: 
Ui: : MainWindow * Ui; 

M_work * work; 
QThread * m_thread; 

}; 



MainWindow: : MainWindow (QWidget * parent) 
: QMainWindow (parent) 
, the UI (new UI: : MainWindow) 
{
The UI - & gt; SetupUi (this); 

Xdebug & lt; <"The MainWindow" & lt; 
The work=new m_work; 
M_thread=new QThread (this); 

The work - & gt; MoveToThread (m_thread); 

M_thread - & gt; start(); 
The connect (this, & amp; MainWindow: : sig, work, & amp; M_work: : m_slot); 

} 

MainWindow: : ~ MainWindow () 
{
Xdebug & lt; <"~ MainWindow"; 

Delete the work; 
The delete m_thread; 
Delete the UI; 
} 


Void MainWindow: : on_btn_close_released () 
{
Xdebug & lt; <"On_btn_close_released"; 
M_thread - & gt; The quit (); 


If (m_thread - & gt; Wait (1000)==false) {
Xdebug & lt; <"M_thread the terminate"; 
M_thread - & gt; The terminate (); 
M_thread - & gt; wait(); 
} 

QApp - & gt; The quit (); 
} 

Void MainWindow: : on_btn_open_released () 
{

Xdebug & lt; <"On_btn_open_released"; 
Emit sig (); 
}