Memory leak? sysfer.dll access violation exception

[froeben]

Hello,

i have written a qml-map widget which gets displayed, but there seems to be an "undefined" object or something like that. I get an access violation exception from sysfer.dll.

I currently don't know where this comes from. Any help would be appreciated!

main.cpp

#include <QtWidgets/QApplication>
#include <MainWindow.h>
 
int main(int argc, char *argv[])
{
	QApplication a(argc, argv);
	// load resources from binary
	// infos: http://doc.qt.io/qt-5/resources.html
	Q_INIT_RESOURCE(qmlsources);
 
	MainWindow mw;
	mw.show();
 
	return a.exec();
}

#include <QtWidgets/QApplication>
#include <MainWindow.h>

int main(int argc, char *argv[])
{
	QApplication a(argc, argv);
	// load resources from binary
	// infos: http://doc.qt.io/qt-5/resources.html
	Q_INIT_RESOURCE(qmlsources);

	MainWindow mw;
	mw.show();

	return a.exec();
}

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MainWindow.h:

#ifndef MAINWINDOW_H
#define MAINWINDOW_H
 
#include <QtWidgets/QWidget>
#include <QtWidgets/QMainWindow>
#include <QtWidgets/QPushButton>
#include <QtWidgets/QMenu>
#include <QtWidgets/QMenuBar>
#include <QtWidgets/QLabel>
 
class MainWindow : public  QMainWindow
{
	Q_OBJECT
 
public:
	MainWindow();
	~MainWindow();
 
protected:
	void contextMenuEvent(QContextMenuEvent *event) Q_DECL_OVERRIDE;
 
private slots:
	void quit();
 
private:
	QPushButton *_quit;
	QMenu *_fileMenu;
 
	QLabel *_infoLabel;
	QAction *_quitAct;
 
	void createMenus();
	void createActions();
 
 
};
 
#endif // MAINWINDOW_H

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QtWidgets/QWidget>
#include <QtWidgets/QMainWindow>
#include <QtWidgets/QPushButton>
#include <QtWidgets/QMenu>
#include <QtWidgets/QMenuBar>
#include <QtWidgets/QLabel>

class MainWindow : public  QMainWindow
{
	Q_OBJECT

public:
	MainWindow();
	~MainWindow();

protected:
	void contextMenuEvent(QContextMenuEvent *event) Q_DECL_OVERRIDE;

private slots:
	void quit();

private:
	QPushButton *_quit;
	QMenu *_fileMenu;
	
	QLabel *_infoLabel;
	QAction *_quitAct;

	void createMenus();
	void createActions();

	
};

#endif // MAINWINDOW_H

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MainWindow.cpp:

#include <QDir>
 
#include <QtWidgets/QWidget>
#include <QtWidgets/QPushButton>
#include <QtWidgets/QMenu>
#include <QtWidgets/QMenuBar>
#include <QtWidgets/QLabel>
#include <QtWidgets/QBoxLayout>
#include <QtGui/QContextMenuEvent>
 
#include <QQmlEngine>
#include <QQmlComponent>
#include <QQuickView>
#include <QQuickWidget>
#include "MainWindow.h"
 
MainWindow::MainWindow() : QMainWindow ()
{
	// embed resources into binary
	// infos: http://doc.qt.io/qt-5/resources.html
	Q_INIT_RESOURCE(qmlsources);
 
	this->resize(1024, 768);
 
	createActions();
	createMenus();
 
	//WORKS!!!
	QQmlEngine *engine = new QQmlEngine(this);
	QQuickWidget *view = new QQuickWidget(engine, this);
	view->setSource(QUrl("qrc:/map.qml"));
 
	this->setCentralWidget(view);
	view->setResizeMode(QQuickWidget::SizeRootObjectToView);
}
 
MainWindow::~MainWindow()
{
 
}
 
void MainWindow::contextMenuEvent(QContextMenuEvent *event)
{
	QMenu menu(this);
	menu.addAction(_quitAct);
	menu.exec(event->globalPos());
}
 
void MainWindow::createMenus()
{
	_fileMenu = menuBar()->addMenu(tr("File"));
	_fileMenu -> addAction(_quitAct);
 
}
 
void MainWindow::createActions()
{
	_quitAct = new QAction(tr("Quit"), this);
	connect(_quitAct, &QAction::triggered, this, &MainWindow::quit);
 
}
 
void MainWindow::quit()
{
//	_infoLabel->setText(tr("Invoked <b>File|Quit</b>"));
	exit(1);
}

#include <QDir>

#include <QtWidgets/QWidget>
#include <QtWidgets/QPushButton>
#include <QtWidgets/QMenu>
#include <QtWidgets/QMenuBar>
#include <QtWidgets/QLabel>
#include <QtWidgets/QBoxLayout>
#include <QtGui/QContextMenuEvent>

#include <QQmlEngine>
#include <QQmlComponent>
#include <QQuickView>
#include <QQuickWidget>
#include "MainWindow.h"

MainWindow::MainWindow() : QMainWindow ()
{
	// embed resources into binary
	// infos: http://doc.qt.io/qt-5/resources.html
	Q_INIT_RESOURCE(qmlsources);

	this->resize(1024, 768);

	createActions();
	createMenus();

	//WORKS!!!
	QQmlEngine *engine = new QQmlEngine(this);
	QQuickWidget *view = new QQuickWidget(engine, this);
	view->setSource(QUrl("qrc:/map.qml"));

	this->setCentralWidget(view);
	view->setResizeMode(QQuickWidget::SizeRootObjectToView);
}

MainWindow::~MainWindow()
{

}

void MainWindow::contextMenuEvent(QContextMenuEvent *event)
{
	QMenu menu(this);
	menu.addAction(_quitAct);
	menu.exec(event->globalPos());
}

void MainWindow::createMenus()
{
	_fileMenu = menuBar()->addMenu(tr("File"));
	_fileMenu -> addAction(_quitAct);
	
}

void MainWindow::createActions()
{
	_quitAct = new QAction(tr("Quit"), this);
	connect(_quitAct, &QAction::triggered, this, &MainWindow::quit);
	
}

void MainWindow::quit()
{
//	_infoLabel->setText(tr("Invoked <b>File|Quit</b>"));
	exit(1);
}

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map.qml:

import QtQuick 2.3
import QtPositioning 5.6
import QtLocation 5.6
 
Map {
	id: map
	width: 640
	height:480
 
	plugin: Plugin {
	name: "osm"
	}
 
	center {
		latitude: -27
		longitude: 153
	}
	zoomLevel: 10
	gesture.enabled: true
 
	Component.onCompleted: {
    console.log("Dimensions: ", width, height)
	}
}

import QtQuick 2.3
import QtPositioning 5.6
import QtLocation 5.6

Map {
	id: map
	width: 640
	height:480
	
	plugin: Plugin {
	name: "osm"
	}
	
	center {
		latitude: -27
		longitude: 153
	}
	zoomLevel: 10
	gesture.enabled: true

	Component.onCompleted: {
    console.log("Dimensions: ", width, height)
	}
}

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Using VisualStudio2015 Ultimate, compiling as debug mode!

Thanks in advance for any hint or comment!