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[Zsombor Egri <1280359@xxxxxxxxxxxxxxxxxx>]

** Changed in: ubuntu-ui-toolkit
       Status: In Progress => Fix Released

** Changed in: ubuntu-clock-app
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1280359

Title:
  Ubuntu Layouts causes application to crash while switching from one
  layout to the other

Status in Clock application for Ubuntu devices:
  Fix Released
Status in Ubuntu UI Toolkit:
  Fix Released
Status in “ubuntu-ui-toolkit” package in Ubuntu:
  Fix Released

Bug description:
  We are trying to implement tablet and phone interfaces for the ubuntu-
  clock-app. Both interfaces have been implemented, however switching
  between them causes the clock app to crash.

  Steps to reproduce this bug:
  1. Branch clock app code from the MR at https://code.launchpad.net/~mdspencer/ubuntu-clock-app/initial-convergent-layout/+merge/203368
  2. Run it and switch from the tablet interface to mobile interface by reducing the application width

  The app then freezes and then crashes unexpectedly.

  The gdb crash log is attached below.

  Program received signal SIGSEGV, Segmentation fault.
  0x00007ffff74c2fd9 in QQmlEngine::contextForObject(QObject const*) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
  (gdb) bt
  #0  0x00007ffff74c2fd9 in QQmlEngine::contextForObject(QObject const*) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
  #1  0x00007fffc61c0891 in PropertyAction::PropertyAction(QObject*, QString const&, PropertyAction::Type) ()
     from /usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Layouts/libUbuntuLayouts.so
  #2  0x00007fffc61c0950 in PropertyChange::PropertyChange(QQuickItem*, QString const&, QVariant const&, PropertyChange::Priority) ()
     from /usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Layouts/libUbuntuLayouts.so
  #3  0x00007fffc61ba4ca in ULLayoutsPrivate::itemActivate(QQuickItem*, bool) () from /usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Layouts/libUbuntuLayouts.so
  #4  0x00007fffc61bceeb in ULLayoutsPrivate::hideExcludedItems() () from /usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Layouts/libUbuntuLayouts.so
  #5  0x00007fffc61bcf98 in ULLayoutsPrivate::statusChanged(QQmlIncubator::Status) () from /usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Layouts/libUbuntuLayouts.so
  #6  0x00007ffff74e2376 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
  #7  0x00007ffff74e2333 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
  #8  0x00007ffff74e29cd in QQmlIncubationController::incubateFor(int) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
  #9  0x00007ffff628519e in QObject::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
  #10 0x00007ffff6d7009c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
  #11 0x00007ffff6d74db2 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
  #12 0x00007ffff625fcbd in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
  #13 0x00007ffff6261497 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
  #14 0x00007ffff62a4e43 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
  #15 0x00007ffff437a3b6 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
  #16 0x00007ffff437a708 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
  #17 0x00007ffff437a7ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
  #18 0x00007ffff62a4b0c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
  #19 0x00007ffff625eb6b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
  #20 0x00007ffff6264301 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
  #21 0x0000000000403e0c in ?? ()
  #22 0x00007ffff56acde5 in __libc_start_main (main=0x4036e0, argc=2, ubp_av=0x7fffffffdca8, init=<optimized out>, fini=<optimized out>, 
      rtld_fini=<optimized out>, stack_end=0x7fffffffdc98) at libc-start.c:260
  #23 0x0000000000406133 in ?? ()

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