QWidget and setVisible() problem

I create a QWidget:

m_widget = new QWidget(parent); where parent is also a QWidget then I set 开发者_如何学Pythonvisible of m_widget to false m_widget->setVisible(false);

after that I need to show m_widget m_widget->setVisible(true); and this line of code hangs the application and only in release build on symbian platform

what's wrong? why does this code work in debug build?

Please help. Thanks in advance!

It looks like this is a bug,
report over here,
https://bugreports.qt.io/

You can get better help by asking on, interest@qt-project.org