Simplest app with QNetworkAccessManager and First-chance exception

[allexz]

Hi all,

I have created the simplest Qt (5.0.0) application using VS Add-in.
Added the simplest network request:

test.h

#ifndef TEST_H
#define TEST_H
 
#include <QtWidgets/QMainWindow>
#include <QtNetwork>
#include "ui_test.h"
 
class Test : public QMainWindow
{
	Q_OBJECT
 
public:
	Test(QWidget *parent = 0);
	~Test();
 
public slots:
	void Button_clicked();
	void Request_finished(QNetworkReply *reply);
 
private:
	Ui::TestClass ui;
};
 
#endif // TEST_H

#ifndef TEST_H
#define TEST_H

#include <QtWidgets/QMainWindow>
#include <QtNetwork>
#include "ui_test.h"

class Test : public QMainWindow
{
	Q_OBJECT

public:
	Test(QWidget *parent = 0);
	~Test();

public slots:
	void Button_clicked();
	void Request_finished(QNetworkReply *reply);

private:
	Ui::TestClass ui;
};

#endif // TEST_H

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test.cpp

#include "test.h"
#include <QtWidgets>
 
Test::Test(QWidget *parent)
	: QMainWindow(parent)
{
	ui.setupUi(this);
	QObject::connect(ui.pushButton, SIGNAL(clicked()), this, SLOT(Button_clicked()));
 
}
 
Test::~Test()
{
 
}
 
void Test::Button_clicked()
{
	QNetworkAccessManager* manager = new QNetworkAccessManager(this);
 
	QObject::connect(manager, SIGNAL(finished(QNetworkReply *)), this, SLOT(Request_finished(QNetworkReply *)));
 
	QNetworkRequest request(QUrl("http://www.google.com"));
 
	QNetworkReply *reply = manager->get(request);
}
 
void Test::Request_finished(QNetworkReply *reply)
{
	reply->deleteLater();
}

#include "test.h"
#include <QtWidgets>

Test::Test(QWidget *parent)
	: QMainWindow(parent)
{
	ui.setupUi(this);
	QObject::connect(ui.pushButton, SIGNAL(clicked()), this, SLOT(Button_clicked()));

}

Test::~Test()
{

}

void Test::Button_clicked()
{
	QNetworkAccessManager* manager = new QNetworkAccessManager(this);

	QObject::connect(manager, SIGNAL(finished(QNetworkReply *)), this, SLOT(Request_finished(QNetworkReply *)));

	QNetworkRequest request(QUrl("http://www.google.com"));

	QNetworkReply *reply = manager->get(request);
}

void Test::Request_finished(QNetworkReply *reply)
{
	reply->deleteLater();
}

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main.cpp

#include "test.h"
#include "qmyapp.h"
 
int main(int argc, char *argv[])
{
	QApplication a(argc, argv);
	Test w;
	w.show();
	return a.exec();
}

#include "test.h"
#include "qmyapp.h"

int main(int argc, char *argv[])
{
	QApplication a(argc, argv);
	Test w;
	w.show();
	return a.exec();
}

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test.ui contains a single QPushButton pushButton.

Now if I start application and press button, then after main window destroyed I receive the following line in VS Output window:

First-chance exception at 0x74e5b9bc in Test.exe: 0x0000000D: The data is invalid.

What's wrong?
Thank you.

[wysota]

Show us the debugger backtrace.

[allexz]

Show us the debugger backtrace.

'Test.exe': Loaded 'W:\BB\Intaview\Test\Win32\Debug\Test.exe', Symbols loaded.
'Test.exe': Loaded 'C:\Windows\SysWOW64\ntdll.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\kernel32.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\KernelBase.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\bin\Qt5Cored.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\user32.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\gdi32.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\lpk.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\usp10.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\msvcrt.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\advapi32.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\sechost.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\rpcrt4.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\sspicli.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\cryptbase.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\ole32.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\ws2_32.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\nsi.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\bin\icuin49.dll', Binary was not built with debug information.
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\bin\icuuc49.dll', Binary was not built with debug information.
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\bin\icudt49.dll', Binary was not built with debug information.
'Test.exe': Loaded 'C:\Windows\SysWOW64\msvcr100.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\msvcp100.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\msvcp100d.dll', Symbols loaded.
'Test.exe': Loaded 'C:\Windows\SysWOW64\msvcr100d.dll', Symbols loaded.
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\bin\Qt5Widgetsd.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\shell32.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\shlwapi.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\bin\Qt5Guid.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\bin\libGLESv2d.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\bin\D3DCompiler_43.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\bin\Qt5Networkd.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\dnsapi.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\crypt32.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\msasn1.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\imm32.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\msctf.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\plugins\platforms\qminimal.dll', Binary was not built with debug information.
'Test.exe': Unloaded 'W:\Qt\5.0.0\msvc2010\plugins\platforms\qminimal.dll'
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\plugins\platforms\qminimald.dll', Cannot find or open the PDB file
'Test.exe': Unloaded 'W:\Qt\5.0.0\msvc2010\plugins\platforms\qminimald.dll'
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\plugins\platforms\qwindows.dll', Binary was not built with debug information.
'Test.exe': Unloaded 'W:\Qt\5.0.0\msvc2010\plugins\platforms\qwindows.dll'
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\plugins\platforms\qwindowsd.dll', Cannot find or open the PDB file
'Test.exe': Unloaded 'W:\Qt\5.0.0\msvc2010\plugins\platforms\qwindowsd.dll'
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\plugins\platforms\qwindowsd.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\winmm.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\oleaut32.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\bin\libEGLd.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\d3d9.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\version.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\d3d8thk.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\dwmapi.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\uxtheme.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Program Files (x86)\ABBYY Lingvo x3\LvHook.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\cryptsp.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\rsaenh.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\RpcRtRemote.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Program Files\ThinkPad\Bluetooth Software\syswow64\BtMmHook.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\psapi.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\clbcatq.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\plugins\bearer\qgenericbearer.dll', Binary was not built with debug information.
'Test.exe': Unloaded 'W:\Qt\5.0.0\msvc2010\plugins\bearer\qgenericbearer.dll'
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\plugins\bearer\qgenericbearerd.dll', Cannot find or open the PDB file
'Test.exe': Unloaded 'W:\Qt\5.0.0\msvc2010\plugins\bearer\qgenericbearerd.dll'
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\plugins\bearer\qnativewifibearer.dll', Binary was not built with debug information.
'Test.exe': Unloaded 'W:\Qt\5.0.0\msvc2010\plugins\bearer\qnativewifibearer.dll'
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\plugins\bearer\qnativewifibearerd.dll', Cannot find or open the PDB file
'Test.exe': Unloaded 'W:\Qt\5.0.0\msvc2010\plugins\bearer\qnativewifibearerd.dll'
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\plugins\bearer\qgenericbearerd.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\IPHLPAPI.DLL', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\winnsi.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\dhcpcsvc.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\dhcpcsvc6.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\plugins\bearer\qnativewifibearerd.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\wlanapi.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\wlanutil.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\mswsock.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\WSHTCPIP.DLL', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\wship6.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Program Files (x86)\Common Files\microsoft shared\Windows Live\WLIDNSP.DLL', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\rasadhlp.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\FWPUCLNT.DLL', Cannot find or open the PDB file
'Test.exe': Unloaded 'C:\Windows\SysWOW64\wship6.dll'
'Test.exe': Unloaded 'C:\Windows\SysWOW64\WSHTCPIP.DLL'
'Test.exe': Unloaded 'C:\Program Files (x86)\Common Files\microsoft shared\Windows Live\WLIDNSP.DLL'
'Test.exe': Unloaded 'C:\Windows\SysWOW64\FWPUCLNT.DLL'
'Test.exe': Loaded 'C:\Windows\SysWOW64\WSHTCPIP.DLL', Cannot find or open the PDB file
First-chance exception at 0x74e5b9bc in Test.exe: 0x0000000D: The data is invalid.
The thread 'Win32 Thread' (0x1cb4) has exited with code 0 (0x0).
The thread 'Win32 Thread' (0xb1d8) has exited with code 0 (0x0).
The thread 'bearerThread' (0xa918) has exited with code 0 (0x0).
The thread 'Thread (pooled)' (0x8248) has exited with code 0 (0x0).
'Test.exe': Unloaded 'C:\Windows\SysWOW64\WSHTCPIP.DLL'
The thread 'Win32 Thread' (0xb164) has exited with code 0 (0x0).
The thread 'httpThread' (0x90cc) has exited with code 0 (0x0).
The thread 'Win32 Thread' (0xa3a0) has exited with code 0 (0x0).
The thread 'Win32 Thread' (0xabe8) has exited with code 0 (0x0).
The thread 'Win32 Thread' (0xad20) has exited with code 0 (0x0).
The thread 'Win32 Thread' (0x22a4) has exited with code 0 (0x0).
The thread 'Win32 Thread' (0xac68) has exited with code 0 (0x0).
The thread 'Win32 Thread' (0xb3a8) has exited with code 0 (0x0).
The program '[39824] Test.exe: Native' has exited with code 0 (0x0).

'Test.exe': Loaded 'W:\BB\Intaview\Test\Win32\Debug\Test.exe', Symbols loaded.
'Test.exe': Loaded 'C:\Windows\SysWOW64\ntdll.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\kernel32.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\KernelBase.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\bin\Qt5Cored.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\user32.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\gdi32.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\lpk.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\usp10.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\msvcrt.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\advapi32.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\sechost.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\rpcrt4.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\sspicli.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\cryptbase.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\ole32.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\ws2_32.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\nsi.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\bin\icuin49.dll', Binary was not built with debug information.
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\bin\icuuc49.dll', Binary was not built with debug information.
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\bin\icudt49.dll', Binary was not built with debug information.
'Test.exe': Loaded 'C:\Windows\SysWOW64\msvcr100.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\msvcp100.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\msvcp100d.dll', Symbols loaded.
'Test.exe': Loaded 'C:\Windows\SysWOW64\msvcr100d.dll', Symbols loaded.
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\bin\Qt5Widgetsd.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\shell32.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\shlwapi.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\bin\Qt5Guid.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\bin\libGLESv2d.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\bin\D3DCompiler_43.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\bin\Qt5Networkd.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\dnsapi.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\crypt32.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\msasn1.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\imm32.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\msctf.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\plugins\platforms\qminimal.dll', Binary was not built with debug information.
'Test.exe': Unloaded 'W:\Qt\5.0.0\msvc2010\plugins\platforms\qminimal.dll'
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\plugins\platforms\qminimald.dll', Cannot find or open the PDB file
'Test.exe': Unloaded 'W:\Qt\5.0.0\msvc2010\plugins\platforms\qminimald.dll'
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\plugins\platforms\qwindows.dll', Binary was not built with debug information.
'Test.exe': Unloaded 'W:\Qt\5.0.0\msvc2010\plugins\platforms\qwindows.dll'
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\plugins\platforms\qwindowsd.dll', Cannot find or open the PDB file
'Test.exe': Unloaded 'W:\Qt\5.0.0\msvc2010\plugins\platforms\qwindowsd.dll'
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\plugins\platforms\qwindowsd.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\winmm.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\oleaut32.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\bin\libEGLd.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\d3d9.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\version.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\d3d8thk.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\dwmapi.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\uxtheme.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Program Files (x86)\ABBYY Lingvo x3\LvHook.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\cryptsp.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\rsaenh.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\RpcRtRemote.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Program Files\ThinkPad\Bluetooth Software\syswow64\BtMmHook.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\psapi.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\clbcatq.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\plugins\bearer\qgenericbearer.dll', Binary was not built with debug information.
'Test.exe': Unloaded 'W:\Qt\5.0.0\msvc2010\plugins\bearer\qgenericbearer.dll'
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\plugins\bearer\qgenericbearerd.dll', Cannot find or open the PDB file
'Test.exe': Unloaded 'W:\Qt\5.0.0\msvc2010\plugins\bearer\qgenericbearerd.dll'
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\plugins\bearer\qnativewifibearer.dll', Binary was not built with debug information.
'Test.exe': Unloaded 'W:\Qt\5.0.0\msvc2010\plugins\bearer\qnativewifibearer.dll'
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\plugins\bearer\qnativewifibearerd.dll', Cannot find or open the PDB file
'Test.exe': Unloaded 'W:\Qt\5.0.0\msvc2010\plugins\bearer\qnativewifibearerd.dll'
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\plugins\bearer\qgenericbearerd.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\IPHLPAPI.DLL', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\winnsi.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\dhcpcsvc.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\dhcpcsvc6.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'W:\Qt\5.0.0\msvc2010\plugins\bearer\qnativewifibearerd.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\wlanapi.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\wlanutil.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\mswsock.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\WSHTCPIP.DLL', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\wship6.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Program Files (x86)\Common Files\microsoft shared\Windows Live\WLIDNSP.DLL', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\rasadhlp.dll', Cannot find or open the PDB file
'Test.exe': Loaded 'C:\Windows\SysWOW64\FWPUCLNT.DLL', Cannot find or open the PDB file
'Test.exe': Unloaded 'C:\Windows\SysWOW64\wship6.dll'
'Test.exe': Unloaded 'C:\Windows\SysWOW64\WSHTCPIP.DLL'
'Test.exe': Unloaded 'C:\Program Files (x86)\Common Files\microsoft shared\Windows Live\WLIDNSP.DLL'
'Test.exe': Unloaded 'C:\Windows\SysWOW64\FWPUCLNT.DLL'
'Test.exe': Loaded 'C:\Windows\SysWOW64\WSHTCPIP.DLL', Cannot find or open the PDB file
First-chance exception at 0x74e5b9bc in Test.exe: 0x0000000D: The data is invalid.
The thread 'Win32 Thread' (0x1cb4) has exited with code 0 (0x0).
The thread 'Win32 Thread' (0xb1d8) has exited with code 0 (0x0).
The thread 'bearerThread' (0xa918) has exited with code 0 (0x0).
The thread 'Thread (pooled)' (0x8248) has exited with code 0 (0x0).
'Test.exe': Unloaded 'C:\Windows\SysWOW64\WSHTCPIP.DLL'
The thread 'Win32 Thread' (0xb164) has exited with code 0 (0x0).
The thread 'httpThread' (0x90cc) has exited with code 0 (0x0).
The thread 'Win32 Thread' (0xa3a0) has exited with code 0 (0x0).
The thread 'Win32 Thread' (0xabe8) has exited with code 0 (0x0).
The thread 'Win32 Thread' (0xad20) has exited with code 0 (0x0).
The thread 'Win32 Thread' (0x22a4) has exited with code 0 (0x0).
The thread 'Win32 Thread' (0xac68) has exited with code 0 (0x0).
The thread 'Win32 Thread' (0xb3a8) has exited with code 0 (0x0).
The program '[39824] Test.exe: Native' has exited with code 0 (0x0).

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P.S. I'm running under Windows 7 Pro x64.

[wysota]

That's not a backtrace.

[allexz]

That's not a backtrace.

I'm sorry.
Do you mean the call stack?
But it is not very informative since it happens in some system thread...

KernelBase.dll!74e5b9bc() 	
 	[Frames below may be incorrect and/or missing, no symbols loaded for KernelBase.dll]	
 	KernelBase.dll!74e5b9bc() 	
>	rpcrt4.dll!74b60e0b() 	
 	rpcrt4.dll!74b60d9a() 	
 	wlanapi.dll!6af34ed7() 	
 	rpcrt4.dll!74b2feac() 	
 	ntdll.dll!7710004d() 	
 	ntdll.dll!7710f8b1() 	
 	ntdll.dll!7710fee2() 	
 	ntdll.dll!77129e83() 	
 	ntdll.dll!7710f8b1() 	
 	KernelBase.dll!74e60a91() 	
 	KernelBase.dll!74e60a2f() 	
 	kernel32.dll!74c61194() 	
 	wlanapi.dll!6af3531d() 	
 	kernel32.dll!74c6339a() 	
 	ntdll.dll!77129ef2() 	
 	ntdll.dll!77129ec5()

KernelBase.dll!74e5b9bc() 	
 	[Frames below may be incorrect and/or missing, no symbols loaded for KernelBase.dll]	
 	KernelBase.dll!74e5b9bc() 	
>	rpcrt4.dll!74b60e0b() 	
 	rpcrt4.dll!74b60d9a() 	
 	wlanapi.dll!6af34ed7() 	
 	rpcrt4.dll!74b2feac() 	
 	ntdll.dll!7710004d() 	
 	ntdll.dll!7710f8b1() 	
 	ntdll.dll!7710fee2() 	
 	ntdll.dll!77129e83() 	
 	ntdll.dll!7710f8b1() 	
 	KernelBase.dll!74e60a91() 	
 	KernelBase.dll!74e60a2f() 	
 	kernel32.dll!74c61194() 	
 	wlanapi.dll!6af3531d() 	
 	kernel32.dll!74c6339a() 	
 	ntdll.dll!77129ef2() 	
 	ntdll.dll!77129ec5()

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Unflagged		46700	0	Main Thread	Main Thread	Test::~Test	Normal
Unflagged		46620	0	Worker Thread	Win32 Thread	7711013d	Normal
Unflagged		7204	0	Worker Thread	Win32 Thread	77111f26	Normal
Unflagged		7908	0	Worker Thread	Win32 Thread	77111f26	Normal
Unflagged		47004	0	RPC Thread	RPC Callback Thread	7710fd71	Normal
Unflagged		24856	0	Worker Thread	Win32 Thread	7711013d	Time Critical
Unflagged		47056	0	Worker Thread	bearerThread	_free_base	Normal
Unflagged	>	44604	0	Worker Thread	Win32 Thread	74e5b9bc	Normal
Unflagged		43628	0	Worker Thread	httpThread	7711013d	Normal
Unflagged		46252	0	Worker Thread	Thread (pooled)	__set_flsgetvalue	Normal
Unflagged		47028	0	Worker Thread	Win32 Thread	77111f26	Normal
Unflagged		46980	0	Worker Thread	Win32 Thread	7710f939	Above Normal

Unflagged		46700	0	Main Thread	Main Thread	Test::~Test	Normal
Unflagged		46620	0	Worker Thread	Win32 Thread	7711013d	Normal
Unflagged		7204	0	Worker Thread	Win32 Thread	77111f26	Normal
Unflagged		7908	0	Worker Thread	Win32 Thread	77111f26	Normal
Unflagged		47004	0	RPC Thread	RPC Callback Thread	7710fd71	Normal
Unflagged		24856	0	Worker Thread	Win32 Thread	7711013d	Time Critical
Unflagged		47056	0	Worker Thread	bearerThread	_free_base	Normal
Unflagged	>	44604	0	Worker Thread	Win32 Thread	74e5b9bc	Normal
Unflagged		43628	0	Worker Thread	httpThread	7711013d	Normal
Unflagged		46252	0	Worker Thread	Thread (pooled)	__set_flsgetvalue	Normal
Unflagged		47028	0	Worker Thread	Win32 Thread	77111f26	Normal
Unflagged		46980	0	Worker Thread	Win32 Thread	7710f939	Above Normal

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[wysota]

First of all build your app in debug mode. Second of all it seems your app reaches the destructor of Test but we have no idea what happens next. If I were to guess, I'd say you have a corrupt stack there.

[allexz]

First of all build your app in debug mode.

It was in debug mode... OK, I've loaded system debug symbols but it did not clear anything.
I just can't understand why it happens if I almost do not add any custom code - only a few lines of code from documentation... Something wrong with my system?
Btw, I tried to switch to Qt 4.8.4 - the same story.

Call stack:

>	KernelBase.dll!_RaiseException@16()  + 0x58 bytes	
 	rpcrt4.dll!_RpcpRaiseException@4()  + 0x2f bytes	
 	rpcrt4.dll!NdrpRaisePipeException()  + 0x16 bytes	
 	rpcrt4.dll!NdrReceive()  + 0x1e55 bytes	
 	rpcrt4.dll!NdrLastAsyncReceive()  + 0x2c bytes	
 	rpcrt4.dll!NdrpCompleteAsyncClientCall()  + 0x85 bytes	
 	rpcrt4.dll!Ndr64pCompleteAsyncCall()  + 0x67 bytes	
 	rpcrt4.dll!_RpcAsyncCompleteCall@8()  + 0x1e bytes	
 	wlanapi.dll!_ClientRpcCallback@12()  + 0xa0 bytes	
 	rpcrt4.dll!I_RpcAPCRoutine()  + 0x2c bytes	
 	ntdll.dll!_KiUserApcDispatcher@16()  + 0x25 bytes	
 	kernel32.dll!_WaitForSingleObjectExImplementation@12()  + 0x43 bytes	
 	wlanapi.dll!_NotificationApcThreadProc@4()  + 0x54 bytes	
 	kernel32.dll!@BaseThreadInitThunk@12()  + 0x12 bytes	
 	ntdll.dll!___RtlUserThreadStart@8()  + 0x27 bytes	
 	ntdll.dll!__RtlUserThreadStart@8()  + 0x1b bytes

>	KernelBase.dll!_RaiseException@16()  + 0x58 bytes	
 	rpcrt4.dll!_RpcpRaiseException@4()  + 0x2f bytes	
 	rpcrt4.dll!NdrpRaisePipeException()  + 0x16 bytes	
 	rpcrt4.dll!NdrReceive()  + 0x1e55 bytes	
 	rpcrt4.dll!NdrLastAsyncReceive()  + 0x2c bytes	
 	rpcrt4.dll!NdrpCompleteAsyncClientCall()  + 0x85 bytes	
 	rpcrt4.dll!Ndr64pCompleteAsyncCall()  + 0x67 bytes	
 	rpcrt4.dll!_RpcAsyncCompleteCall@8()  + 0x1e bytes	
 	wlanapi.dll!_ClientRpcCallback@12()  + 0xa0 bytes	
 	rpcrt4.dll!I_RpcAPCRoutine()  + 0x2c bytes	
 	ntdll.dll!_KiUserApcDispatcher@16()  + 0x25 bytes	
 	kernel32.dll!_WaitForSingleObjectExImplementation@12()  + 0x43 bytes	
 	wlanapi.dll!_NotificationApcThreadProc@4()  + 0x54 bytes	
 	kernel32.dll!@BaseThreadInitThunk@12()  + 0x12 bytes	
 	ntdll.dll!___RtlUserThreadStart@8()  + 0x27 bytes	
 	ntdll.dll!__RtlUserThreadStart@8()  + 0x1b bytes

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Threads:

Unflagged		47848	0	Main Thread	Main Thread	QPushButton::`scalar deleting destructor'	Normal
Unflagged		48388	0	Worker Thread	_TppWaiterpThread@4	_ZwWaitForMultipleObjects@20	Normal
Unflagged		47932	0	Worker Thread	_TppWorkerThread@4	_NtWaitForWorkViaWorkerFactory@8	Normal
Unflagged		48856	0	Worker Thread	_TppWorkerThread@4	_NtWaitForWorkViaWorkerFactory@8	Normal
Unflagged		31392	0	RPC Thread	RPC Callback Thread	CROIDTable::WorkerThreadLoop	Normal
Unflagged		48988	0	Worker Thread	_timeThread@4	_ZwWaitForMultipleObjects@20	Time Critical
Unflagged		43132	0	Worker Thread	bearerThread	_NtWaitForSingleObject@12	Normal
Unflagged	>	45812	0	Worker Thread	_NotificationApcThreadProc@4	_RaiseException@16	Normal
Unflagged		49048	0	Worker Thread	httpThread	_ZwWaitForMultipleObjects@20	Normal
Unflagged		48496	0	Worker Thread	Thread (pooled)	_NtWaitForSingleObject@12	Normal
Unflagged		49036	0	Worker Thread	_TppWorkerThread@4	_NtWaitForWorkViaWorkerFactory@8	Normal
Unflagged		48080	0	Worker Thread	_SockAsyncThread@4	_ZwRemoveIoCompletion@20	Above Normal
Unflagged		48172	0	Worker Thread	Win32 Thread	_ZwWaitForMultipleObjects@20	Normal
Unflagged		48000	0	Worker Thread	_TppWorkerThread@4	_NtWaitForWorkViaWorkerFactory@8	Normal

Unflagged		47848	0	Main Thread	Main Thread	QPushButton::`scalar deleting destructor'	Normal
Unflagged		48388	0	Worker Thread	_TppWaiterpThread@4	_ZwWaitForMultipleObjects@20	Normal
Unflagged		47932	0	Worker Thread	_TppWorkerThread@4	_NtWaitForWorkViaWorkerFactory@8	Normal
Unflagged		48856	0	Worker Thread	_TppWorkerThread@4	_NtWaitForWorkViaWorkerFactory@8	Normal
Unflagged		31392	0	RPC Thread	RPC Callback Thread	CROIDTable::WorkerThreadLoop	Normal
Unflagged		48988	0	Worker Thread	_timeThread@4	_ZwWaitForMultipleObjects@20	Time Critical
Unflagged		43132	0	Worker Thread	bearerThread	_NtWaitForSingleObject@12	Normal
Unflagged	>	45812	0	Worker Thread	_NotificationApcThreadProc@4	_RaiseException@16	Normal
Unflagged		49048	0	Worker Thread	httpThread	_ZwWaitForMultipleObjects@20	Normal
Unflagged		48496	0	Worker Thread	Thread (pooled)	_NtWaitForSingleObject@12	Normal
Unflagged		49036	0	Worker Thread	_TppWorkerThread@4	_NtWaitForWorkViaWorkerFactory@8	Normal
Unflagged		48080	0	Worker Thread	_SockAsyncThread@4	_ZwRemoveIoCompletion@20	Above Normal
Unflagged		48172	0	Worker Thread	Win32 Thread	_ZwWaitForMultipleObjects@20	Normal
Unflagged		48000	0	Worker Thread	_TppWorkerThread@4	_NtWaitForWorkViaWorkerFactory@8	Normal

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[wysota]

Is what you posted earlier a complete app you're testing on right now?

[allexz]

Is what you posted earlier a complete app you're testing on right now?

Yes! Nothing more! Just a clear project with one button and simple network request.

[wysota]

Try setting a breakpoint in destructor of Test and step through the code to see when it crashes.

[allexz]

I found one interesting thing. If I set breakpoint in the destructor of Test class, wait few seconds and continue execution - the exception is not raised.
Looks like some resources don't have time to be freed...