Issue with openUrlExternally

12 static void qt_message_print(QtMsgType, const class QMessageLogContext
& const, const class QString & const) Qt5Core.dll [qlogging.cpp : 1836
+ 0x19]
13 static class QString qt_message(QtMsgType, const class QMessageLogContext
& const, const char *, char *) Qt5Core.dll [qlogging.cpp : 373 + 0xd]
14 QMessageLogger::fatal(char const *,...) Qt5Core.dll [qlogging.cpp : 885 +
0x18]
15 QQmlData::destroyed(QObject *) Qt5Qml.dll [qqmlengine.cpp : 1957 + 0x42]
<SNIP>
32 QQmlPrivate::QQmlElement<QQuickWindowQmlImpl>::`scalar deleting
destructor'(unsigned int) Qt5Quick.dll + 0x4c
33 QObject::event(QEvent *) Qt5Core.dll [qobject.cpp : 1251 + 0x17]
34 QApplicationPrivate::notify_helper(QObject *,QEvent *) Qt5Widgets.dll
[qapplication.cpp : 3700 + 0xc]
35 QApplication::notify(QObject *,QEvent *) Qt5Widgets.dll [qapplication.cpp :
3529 + 0xe]
36 Application::notify(QObject *,QEvent *)
App.exe [Application.cpp : 140 + 0xf]
37 QCoreApplication::notifyInternal2(QObject *,QEvent *) Qt5Core.dll
[qcoreapplication.cpp : 1088 + 0x13]
38 QCoreApplicationPrivate::sendPostedEvents(QObject *,int,QThreadData *)
Qt5Core.dll [qcoreapplication.cpp : 1825 + 0x19]
39 qwindows.dll + 0x6354f
40 qt_internal_proc(HWND__ *,unsigned int,unsigned __int64,__int64)
Qt5Core.dll [qeventdispatcher_win.cpp : 245 + 0xc]
<VARIOUS SHELL32.DLL FRAMES>
64 qwindows.dll + 0xfcc30
65 QDesktopServices::openUrl(QUrl const &) Qt5Gui.dll
[qdesktopservices.cpp : 232 + 0xc]
66 QV4::QtObject::method_openUrlExternally(QV4::FunctionObject const
*,QV4::Value const *,QV4::Value const *,int) Qt5Qml.dll
[qqmlbuiltinfunctions.cpp : 940 + 0x14]
67 QV4::Moth::VME::interpret(QV4::CppStackFrame *,QV4::ExecutionEngine *,char
const *) Qt5Qml.dll [qv4vme_moth.cpp : 738 + 0x1d]
...

MyObject::cppSlot
MyObject::cppSlot::<lambda_b395a9bf7b216b133b634b5a744c72c2>::operator () delete button
Object 0x2a8550f9110 destroyed while one of its QML signal handlers is in progress.
Most likely the object was deleted synchronously (use QObject::deleteLater() instead), or the application is running a nested event loop.
This behavior is NOT supported!
qrc:/main.qml:17: function() { [native code] }