qt - C++ type's destructor not called in QML -

i create sailfish app (using latest sailfish sdk). have problem exposing c++ object qml. inherits qsettings,

class settings : public qsettings {     q_object     /**/ public:     explicit settings() : qsettings("marcin mielniczuk", "bigtext") {}     ~settings() { qdebug() << "dying"; }      /**/ }; 

i noticed destructor isn't called @ all. (there's not destructor output)

i create object that:

import qtquick 2.0 import sailfish.silica 1.0 import bigtext 1.0 import "pages"  applicationwindow {     initialpage: mainpage { }     settings {id: settings} } 

my main.cpp is:

q_decl_export int main(int argc, char *argv[]) {     qscopedpointer<qguiapplication> app(sailfish::createapplication(argc, argv));      qmlregistertype<settings>("bigtext", 1, 0, "settings");      qscopedpointer<qquickview> view(sailfish::createview("main.qml"));      sailfish::showview(view.data());      return app->exec(); } 

what doing wrong?

/edit: text not being printed isn't actual problem - it's indicator of problem. qsettings sycing in destructor doesn't work too.

edit2: please note, applicationwindow in i'm using sailfish silica, not qtquick.controls, , window shown ok. these components must different stock qt quick components.

there's nothing inherently wrong logic. here simplified version of it. can run locally, , consistently dying message on output every time window closed , application terminates.

if cannot figure out, suggest transforming code you're doing until fails.

by way, surely snippet of larger you're doing, @ least far example goes, these scoped pointers aren't doing much.

main.qml

import qtquick 2.0 import bigtext 1.0  item {     width: 300; height: 300     settings {id: settings} } 

main.cpp

class settings : public qsettings {     q_object     public:     settings() : qsettings("marcin mielniczuk", "bigtext") {}     ~settings() { qdebug() << "dying"; }  };  int main(int argc, char *argv[]) {     qscopedpointer<qguiapplication> app(new qguiapplication(argc, argv));     qmlregistertype<settings>("bigtext", 1, 0, "settings");     qscopedpointer<qquickview> view(new qquickview());     view->setsource(qurl::fromlocalfile("main.qml"));     view->show();     return app->exec(); }