Application: kdenlive (16.12.0)
 (Compiled from sources)
Qt Version: 5.7.1
Frameworks Version: 5.29.0
Operating System: Linux 4.9.0-gentoo x86_64
Distribution: "Gentoo Base System release 2.2"

-- Information about the crash:
- What I was doing when the application crashed:

1. I load my project.
2. In "Project Settings" change "Resolution" from "Full HD 1080" to "HD 720"
3. Click "OK"
4. CRASH!

The crash can be reproduced every time.

-- Backtrace:
Application: Kdenlive (kdenlive), signal: Segmentation fault
[KCrash Handler]
#6  QListData::size (this=0x10) at /usr/include/qt5/QtCore/qlist.h:113
#7  QList<AbstractProjectItem*>::count (this=0x10) at /usr/include/qt5/QtCore/qlist.h:339
#8  ProjectFolder::childClips (this=0x0) at /var/tmp/portage/kde-apps/kdenlive-16.12.0/work/kdenlive-16.12.0/src/bin/projectfolder.cpp:75
#9  0x000056202f2cd9b9 in Bin::resetUsageCount (this=<optimized out>) at /var/tmp/portage/kde-apps/kdenlive-16.12.0/work/kdenlive-16.12.0/src/bin/bin.cpp:3519
#10 0x00007fb23ad9747a in QtPrivate::QSlotObjectBase::call (a=0x7ffe743841a0, r=0x562030631d90, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:101
#11 QMetaObject::activate (sender=sender@entry=0x5620316298c0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=9, argv=argv@entry=0x0) at kernel/qobject.cpp:3723
#12 0x00007fb23ad97a9e in QMetaObject::activate (sender=sender@entry=0x5620316298c0, m=m@entry=0x56202f701ea0 <Timeline::staticMetaObject>, local_signal_index=local_signal_index@entry=9, argv=argv@entry=0x0) at kernel/qobject.cpp:3602
#13 0x000056202f35b96a in Timeline::resetUsageCount (this=this@entry=0x5620316298c0) at /var/tmp/portage/kde-apps/kdenlive-16.12.0/work/kdenlive-16.12.0_build/src/moc_timeline.cpp:531
#14 0x000056202f082d4d in Timeline::getTracks (this=0x5620316298c0) at /var/tmp/portage/kde-apps/kdenlive-16.12.0/work/kdenlive-16.12.0/src/timeline/timeline.cpp:298
#15 0x000056202f03e7e1 in CustomTrackView::reloadTimeline (this=this@entry=0x562031614720) at /var/tmp/portage/kde-apps/kdenlive-16.12.0/work/kdenlive-16.12.0/src/timeline/customtrackview.cpp:3505
#16 0x000056202f044426 in CustomTrackView::updateSceneFrameWidth (this=0x562031614720, fpsChanged=fpsChanged@entry=2.5024999999999999) at /var/tmp/portage/kde-apps/kdenlive-16.12.0/work/kdenlive-16.12.0/src/timeline/customtrackview.cpp:339
#17 0x000056202f077a46 in Timeline::updateProfile (this=0x5620316298c0, fpsChanged=2.5024999999999999) at /var/tmp/portage/kde-apps/kdenlive-16.12.0/work/kdenlive-16.12.0/src/timeline/timeline.cpp:1305
#18 0x00007fb23ad9747a in QtPrivate::QSlotObjectBase::call (a=0x7ffe74384600, r=0x5620316298c0, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:101
#19 QMetaObject::activate (sender=sender@entry=0x562031eff0a0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=7, argv=argv@entry=0x7ffe74384600) at kernel/qobject.cpp:3723
#20 0x00007fb23ad97a9e in QMetaObject::activate (sender=sender@entry=0x562031eff0a0, m=m@entry=0x56202f703d60 <KdenliveDoc::staticMetaObject>, local_signal_index=local_signal_index@entry=7, argv=argv@entry=0x7ffe74384600) at kernel/qobject.cpp:3602
#21 0x000056202f350652 in KdenliveDoc::updateFps (this=this@entry=0x562031eff0a0, _t1=_t1@entry=2.5024999999999999) at /var/tmp/portage/kde-apps/kdenlive-16.12.0/work/kdenlive-16.12.0_build/src/moc_kdenlivedoc.cpp:472
#22 0x000056202ef6f9d4 in KdenliveDoc::updateProjectProfile (this=this@entry=0x562031eff0a0, reloadProducers=reloadProducers@entry=true) at /var/tmp/portage/kde-apps/kdenlive-16.12.0/work/kdenlive-16.12.0/src/doc/kdenlivedoc.cpp:1471
#23 0x000056202ef6fb2a in KdenliveDoc::resetProfile (this=0x562031eff0a0) at /var/tmp/portage/kde-apps/kdenlive-16.12.0/work/kdenlive-16.12.0/src/doc/kdenlivedoc.cpp:1480
#24 0x000056202efdb93b in ProjectManager::slotResetProfiles (this=0x5620305a4780) at /var/tmp/portage/kde-apps/kdenlive-16.12.0/work/kdenlive-16.12.0/src/project/projectmanager.cpp:719
#25 0x000056202f3140c9 in MainWindow::slotEditProjectSettings (this=0x562030572010) at /var/tmp/portage/kde-apps/kdenlive-16.12.0/work/kdenlive-16.12.0/src/mainwindow.cpp:1666
#26 0x000056202f36db7d in MainWindow::qt_static_metacall (_o=0x562030572010, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /var/tmp/portage/kde-apps/kdenlive-16.12.0/work/kdenlive-16.12.0_build/src/moc_mainwindow.cpp:811
#27 0x00007fb23ad971c0 in QMetaObject::activate (sender=sender@entry=0x562030bfd5a0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7ffe74384a70) at kernel/qobject.cpp:3740
#28 0x00007fb23ad97a9e in QMetaObject::activate (sender=sender@entry=0x562030bfd5a0, m=m@entry=0x7fb23c8ee760 <QAction::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7ffe74384a70) at kernel/qobject.cpp:3602
#29 0x00007fb23c353a31 in QAction::triggered (this=this@entry=0x562030bfd5a0, _t1=false) at .moc/moc_qaction.cpp:369
#30 0x00007fb23c357250 in QAction::activate (this=0x562030bfd5a0, event=<optimized out>) at kernel/qaction.cpp:1170
#31 0x00007fb23c503d9a in QMenuPrivate::activateCausedStack (this=this@entry=0x56203140a1d0, causedStack=..., action=action@entry=0x562030bfd5a0, action_e=action_e@entry=QAction::Trigger, self=self@entry=true) at widgets/qmenu.cpp:1140
#32 0x00007fb23c50c3e5 in QMenuPrivate::activateAction (this=this@entry=0x56203140a1d0, action=action@entry=0x562030bfd5a0, action_e=action_e@entry=QAction::Trigger, self=self@entry=true) at widgets/qmenu.cpp:1217
#33 0x00007fb23c50d310 in QMenu::mouseReleaseEvent (this=<optimized out>, e=0x7ffe743850e0) at widgets/qmenu.cpp:2680
#34 0x00007fb23c3b2208 in QWidget::event (this=this@entry=0x562030ab3cd0, event=event@entry=0x7ffe743850e0) at kernel/qwidget.cpp:9161
#35 0x00007fb23c50f6d3 in QMenu::event (this=0x562030ab3cd0, e=0x7ffe743850e0) at widgets/qmenu.cpp:2799
#36 0x00007fb23c35c8ec in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x562030ab3cd0, e=0x7ffe743850e0) at kernel/qapplication.cpp:3799
#37 0x00007fb23c365845 in QApplication::notify (this=<optimized out>, receiver=0x562030ab3cd0, e=0x7ffe743850e0) at kernel/qapplication.cpp:3273
#38 0x00007fb23ad68799 in QCoreApplication::notifyInternal2 (receiver=receiver@entry=0x562030ab3cd0, event=event@entry=0x7ffe743850e0) at kernel/qcoreapplication.cpp:988
#39 0x00007fb23c3644ff in QCoreApplication::sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#40 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x562030ab3cd0, event=event@entry=0x7ffe743850e0, alienWidget=0x0, alienWidget@entry=0x562030ab3cd0, nativeWidget=0x562030ab3cd0, buttonDown=buttonDown@entry=0x7fb23c9195a0 <qt_button_down>, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:2771
#41 0x00007fb23c3d2c8d in QWidgetWindow::handleMouseEvent (this=this@entry=0x562031fd06a0, event=event@entry=0x7ffe74385510) at kernel/qwidgetwindow.cpp:511
#42 0x00007fb23c3d5523 in QWidgetWindow::event (this=0x562031fd06a0, event=0x7ffe74385510) at kernel/qwidgetwindow.cpp:239
#43 0x00007fb23c35c8ec in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x562031fd06a0, e=0x7ffe74385510) at kernel/qapplication.cpp:3799
#44 0x00007fb23c364f75 in QApplication::notify (this=0x7ffe74385a50, receiver=0x562031fd06a0, e=0x7ffe74385510) at kernel/qapplication.cpp:3556
#45 0x00007fb23ad68799 in QCoreApplication::notifyInternal2 (receiver=receiver@entry=0x562031fd06a0, event=event@entry=0x7ffe74385510) at kernel/qcoreapplication.cpp:988
#46 0x00007fb23b0cb1f7 in QCoreApplication::sendSpontaneousEvent (event=0x7ffe74385510, receiver=0x562031fd06a0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#47 QGuiApplicationPrivate::processMouseEvent (e=0x5620317a58e0) at kernel/qguiapplication.cpp:1903
#48 0x00007fb23b0cd225 in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x5620317a58e0) at kernel/qguiapplication.cpp:1687
#49 0x00007fb23b0a53f2 in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:659
#50 0x00007fb22defc6af in userEventSourceDispatch (source=<optimized out>) at eventdispatchers/qeventdispatcher_glib.cpp:76
#51 0x00007fb2351a388e in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#52 0x00007fb2351a3b08 in ?? () from /usr/lib64/libglib-2.0.so.0
#53 0x00007fb2351a3c0b in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#54 0x00007fb23adc42de in QEventDispatcherGlib::processEvents (this=0x5620304dce80, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#55 0x00007fb23ad67002 in QEventLoop::exec (this=this@entry=0x7ffe74385910, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#56 0x00007fb23ad6fe4b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1261
#57 0x000056202ef412c2 in main (argc=<optimized out>, argv=<optimized out>) at /var/tmp/portage/kde-apps/kdenlive-16.12.0/work/kdenlive-16.12.0/src/main.cpp:158