Bug 364730

Since I updated to Qt 5.7, I'm getting regular crashes when displaying some articles. What happens is that first the page disappears and when I change the article then it crashes. Here's the gdb output I get.

[Thread 0x7fff53fff700 (LWP 27395) exited]
akregator(27242)/(js) unknown: Mixed Content: The page at 'https://dtm.advertising.com/ids/916f392e-1af6-43dd-bc12-239421d8b718?secure=true' was loaded over HTTPS, but requested an insecure image 'http://pixel.advertising.com/ups/236/sync?sInitiator=internal&uid=40D9DDA9681D8D9A'. This content should also be served over HTTPS.
akregator(27242)/(js) unknown: Mixed Content: The page at 'https://cdn.at.atwola.com/_media/uac/tcode3.html#&kventryid=1343574&kvcmsid=tcr%3A1343574&kvugc=0&kvsubj=978794%3A980487%3A980524%3A982665%3A983462%3A6359463&kvent=3856042%3A4277360&kventryid=1343574&kvcmsid=tcr%3A1343574&kvugc=0&kvsubj=978794%3A980487%3A980524%3A982665%3A983462%3A6359463&kvent=3856042%3A4277360&kventryid=1343574&kvcmsid=tcr%3A1343574&kvugc=0&kvsubj=978794%3A980487%3A980524%3A982665%3A983462%3A6359463&kvent=3856042%3A4277360&kventryid=1343574&kvcmsid=tcr%3A1343574&kvugc=0&kvsubj=978794%3A980487%3A980524%3A982665%3A983462%3A6359463&kvent=3856042%3A4277360&kventryid=1343574&kvcmsid=tcr%3A1343574&kvugc=0&kvsubj=978794%3A980487%3A980524%3A982665%3A983462%3A6359463&kvent=3856042%3A4277360&kventryid=1343574&kvcmsid=tcr%3A1343574&kvugc=0&kvsubj=978794%3A980487%3A980524%3A982665%3A983462%3A6359463&kvent=3856042%3A4277360&kventryid=1343574&kvcmsid=tcr%3A1343574&kvugc=0&kvsubj=978794%3A980487%3A980524%3A982665%3A983462%3A6359463&kvent=3856042%3A4277360&' was loaded over HTTPS, but requested an insecure image 'http://r.nexac.com/e/getdata.xgi?dt=br&pkey=jtkr94hrnfw22&ru=http://ar.atwola.com/atd?it=7%26iv=%3cna_di%3e%26at=8%26av=%3cna_di2%3e%26ds=7%26ed=%3cna_da%3e%26rand=747607'. This content should also be served over HTTPS.
akregator(27242)/(js) unknown: Mixed Content: The page at 'https://cdn.at.atwola.com/_media/uac/tcode3.html#&kventryid=1343574&kvcmsid=tcr%3A1343574&kvugc=0&kvsubj=978794%3A980487%3A980524%3A982665%3A983462%3A6359463&kvent=3856042%3A4277360&kventryid=1343574&kvcmsid=tcr%3A1343574&kvugc=0&kvsubj=978794%3A980487%3A980524%3A982665%3A983462%3A6359463&kvent=3856042%3A4277360&kventryid=1343574&kvcmsid=tcr%3A1343574&kvugc=0&kvsubj=978794%3A980487%3A980524%3A982665%3A983462%3A6359463&kvent=3856042%3A4277360&kventryid=1343574&kvcmsid=tcr%3A1343574&kvugc=0&kvsubj=978794%3A980487%3A980524%3A982665%3A983462%3A6359463&kvent=3856042%3A4277360&kventryid=1343574&kvcmsid=tcr%3A1343574&kvugc=0&kvsubj=978794%3A980487%3A980524%3A982665%3A983462%3A6359463&kvent=3856042%3A4277360&kventryid=1343574&kvcmsid=tcr%3A1343574&kvugc=0&kvsubj=978794%3A980487%3A980524%3A982665%3A983462%3A6359463&kvent=3856042%3A4277360&kventryid=1343574&kvcmsid=tcr%3A1343574&kvugc=0&kvsubj=978794%3A980487%3A980524%3A982665%3A983462%3A6359463&kvent=3856042%3A4277360&' was loaded over HTTPS, but requested an insecure image 'http://ar.atwola.com/atd?it=7&iv=&at=8&av=&ds=7&ed=&rand=747607'. This content should also be served over HTTPS.
Received signal 11 SEGV_MAPERR 000000000020
#0 0x7ffff4e1884e base::debug::StackTrace::StackTrace()
#1 0x7ffff4e18c09 base::debug::(anonymous namespace)::StackDumpSignalHandler()
#2 0x7ffff185cf00 <unknown>
#3 0x7ffff47f1e75 blink::LayoutObject::isDescendantOf()
#4 0x7ffff486cedc blink::CompositedLayerMapping::containingSquashedLayer()
#5 0x7ffff48efcfb blink::CompositingLayerAssigner::getReasonsPreventingSquashing()
#6 0x7ffff48f089e blink::CompositingLayerAssigner::assignLayersToBackingsInternal()
#7 0x7ffff48f0629 blink::CompositingLayerAssigner::assignLayersToBackingsInternal()
#8 0x7ffff48f0629 blink::CompositingLayerAssigner::assignLayersToBackingsInternal()
#9 0x7ffff48f0629 blink::CompositingLayerAssigner::assignLayersToBackingsInternal()
#10 0x7ffff48f0629 blink::CompositingLayerAssigner::assignLayersToBackingsInternal()
#11 0x7ffff48f0a71 blink::CompositingLayerAssigner::assign()
#12 0x7ffff4871ed9 blink::PaintLayerCompositor::updateIfNeeded()
#13 0x7ffff4873186 blink::PaintLayerCompositor::updateIfNeededRecursive()
#14 0x7ffff5db08cc blink::FrameView::updateLifecyclePhasesInternal()
#15 0x7ffff5eea0f8 blink::PageAnimator::updateAllLifecyclePhases()
#16 0x7ffff44dad82 blink::WebViewImpl::updateAllLifecyclePhases()
#17 0x7ffff4c921b2 content::RenderWidgetCompositor::UpdateLayerTreeHost()
#18 0x7ffff62ac409 cc::ProxyMain::BeginMainFrame()
#19 0x7ffff62b3c15 _ZN4base8internal7InvokerINS_13IndexSequenceIJLm0ELm1EEEENS0_9BindStateINS0_15RunnableAdapterIMN2cc9ProxyMainEFv10scoped_ptrINS6_28BeginMainFrameAndCommitStateESt14default_deleteIS9_EEEEEFvPS7_SC_EJNS_7WeakPtrIS7_EENS0_13PassedWrapperISC_EEEEENS0_8TypeListIJNS0_12UnwrapTraitsISJ_EENSO_ISL_EEEEENS0_12InvokeHelperILb1EvSF_NSN_IJRKSJ_SC_EEEEEFvvEE3RunEPNS0_13BindStateBaseE
#20 0x7ffff4e89579 base::debug::TaskAnnotator::RunTask()
#21 0x7ffff54ba764 scheduler::TaskQueueManager::ProcessTaskFromWorkQueue()
#22 0x7ffff54baf79 scheduler::TaskQueueManager::DoWork()
#23 0x7ffff4e89579 base::debug::TaskAnnotator::RunTask()
#24 0x7ffff4e35939 base::MessageLoop::RunTask()
#25 0x7ffff4e36519 base::MessageLoop::DeferOrRunPendingTask()
#26 0x7ffff4e369d2 base::MessageLoop::DoWork()
#27 0x7ffff4e38839 base::MessagePumpDefault::Run()
#28 0x7ffff4e4a23a base::RunLoop::Run()
#29 0x7ffff4e34d15 base::MessageLoop::Run()
#30 0x7ffff4bc5b1f content::RendererMain()
#31 0x7ffff408af84 content::RunZygote()
#32 0x7ffff408b4c4 content::ContentMainRunnerImpl::Run()
#33 0x7ffff408aa31 content::ContentMain()
#34 0x7ffff34de7e4 QtWebEngine::processMain()
#35 0x0000004007e3 main
#36 0x7ffff0c2a741 __libc_start_main
#37 0x000000400829 _start
  r8: 00000000000002f3  r9: 0000000000000000 r10: 00000000fffde004 r11: 00000000fffffedf
 r12: 00001793f0eddac0 r13: 0000000000000002 r14: 0000000000000000 r15: 0000069f10010000
  di: 0000000000000000  si: 0000069f10020f68  bp: 0000000000000000  bx: 0000000000000000
  dx: 0000000000000002  ax: 0000069f100124c0  cx: 0000000000000037  sp: 00007fffffffc8d8
  ip: 00007ffff47f1e75 efl: 0000000000010293 cgf: 002b000000000033 erf: 0000000000000004
 trp: 000000000000000e msk: 0000000000000000 cr2: 0000000000000020
[end of stack trace]

Thread 1 "akregator" received signal SIGSEGV, Segmentation fault.
0x00007fffea20c9c6 in QtWebEngineCore::WebContentsViewQt::RenderViewCreated (this=0xc08820, host=<optimized out>)
    at /home/apol/devel/frameworks/qt5/qtwebengine/src/core/web_contents_view_qt.cpp:99
99              m_webContents->GetRenderWidgetHostView()->SetBackgroundColor(toSk(m_client->backgroundColor()));
(gdb) where
#0  0x00007fffea20c9c6 in QtWebEngineCore::WebContentsViewQt::RenderViewCreated (this=0xc08820, host=<optimized out>)
    at /home/apol/devel/frameworks/qt5/qtwebengine/src/core/web_contents_view_qt.cpp:99
#1  0x00007fffeaef4831 in content::WebContentsImpl::RenderViewCreated (this=0xbfe4a0, render_view_host=0x10ed1f0)
    at /home/apol/devel/frameworks/qt5/qtwebengine/src/3rdparty/chromium/content/browser/web_contents/web_contents_impl.cc:3922
#2  0x00007fffeae70ecd in content::RenderViewHostImpl::CreateRenderView (this=0x10ed1f0, opener_frame_route_id=<optimized out>, proxy_route_id=<optimized out>, max_page_id=<optimized out>, 
    replicated_frame_state=..., window_was_created_with_opener=<optimized out>)
    at /home/apol/devel/frameworks/qt5/qtwebengine/src/3rdparty/chromium/content/browser/renderer_host/render_view_host_impl.cc:360
#3  0x00007fffeaef6a3a in content::WebContentsImpl::CreateRenderViewForRenderManager (this=0xbfe4a0, render_view_host=0x10ed1f0, opener_frame_routing_id=<optimized out>, proxy_routing_id=-2, 
    replicated_frame_state=...) at /home/apol/devel/frameworks/qt5/qtwebengine/src/3rdparty/chromium/content/browser/web_contents/web_contents_impl.cc:4555
#4  0x00007fffeaded52e in content::RenderFrameHostManager::CreateRenderFrame (this=this@entry=0xbf82f0, instance=instance@entry=0xc043c0, flags=flags@entry=0, 
    view_routing_id_ptr=view_routing_id_ptr@entry=0x0) at /home/apol/devel/frameworks/qt5/qtwebengine/src/3rdparty/chromium/content/browser/frame_host/render_frame_host_manager.cc:1718
#5  0x00007fffeadee782 in content::RenderFrameHostManager::CreatePendingRenderFrameHost (this=this@entry=0xbf82f0, old_instance=old_instance@entry=0x25ef200, 
    new_instance=new_instance@entry=0xc043c0) at /home/apol/devel/frameworks/qt5/qtwebengine/src/3rdparty/chromium/content/browser/frame_host/render_frame_host_manager.cc:1517
#6  0x00007fffeadeeab8 in content::RenderFrameHostManager::UpdateStateForNavigate (this=this@entry=0xbf82f0, dest_url=..., source_instance=<optimized out>, dest_instance=<optimized out>, 
    transition=<optimized out>, dest_is_restore=dest_is_restore@entry=false, dest_is_view_source_mode=<optimized out>, transferred_request_id=..., bindings=<optimized out>)
    at /home/apol/devel/frameworks/qt5/qtwebengine/src/3rdparty/chromium/content/browser/frame_host/render_frame_host_manager.cc:2164
#7  0x00007fffeadeeee0 in content::RenderFrameHostManager::Navigate (this=this@entry=0xbf82f0, dest_url=..., frame_entry=..., entry=...)
    at /home/apol/devel/frameworks/qt5/qtwebengine/src/3rdparty/chromium/content/browser/frame_host/render_frame_host_manager.cc:268
#8  0x00007fffeafe4fa7 in content::NavigatorImpl::NavigateToEntry (this=this@entry=0xbf6770, frame_tree_node=frame_tree_node@entry=0xbf82e0, frame_entry=..., entry=..., 
    reload_type=reload_type@entry=content::NavigationController::NO_RELOAD, is_same_document_history_load=is_same_document_history_load@entry=false, is_pending_entry=<optimized out>)
    at /home/apol/devel/frameworks/qt5/qtwebengine/src/3rdparty/chromium/content/browser/frame_host/navigator_impl.cc:326
#9  0x00007fffeafe56d2 in content::NavigatorImpl::NavigateToPendingEntry (this=0xbf6770, frame_tree_node=0xbf82e0, frame_entry=..., reload_type=content::NavigationController::NO_RELOAD, 
    is_same_document_history_load=<optimized out>) at /home/apol/devel/frameworks/qt5/qtwebengine/src/3rdparty/chromium/content/browser/frame_host/navigator_impl.cc:406
#10 0x00007fffeadd1445 in content::NavigationControllerImpl::NavigateToPendingEntryInternal (this=this@entry=0xbfe530, reload_type=reload_type@entry=content::NavigationController::NO_RELOAD)
    at /home/apol/devel/frameworks/qt5/qtwebengine/src/3rdparty/chromium/content/browser/frame_host/navigation_controller_impl.cc:1813
#11 0x00007fffeadd169e in content::NavigationControllerImpl::NavigateToPendingEntry (this=this@entry=0xbfe530, reload_type=reload_type@entry=content::NavigationController::NO_RELOAD)
    at /home/apol/devel/frameworks/qt5/qtwebengine/src/3rdparty/chromium/content/browser/frame_host/navigation_controller_impl.cc:1789
#12 0x00007fffeadd1cdf in content::NavigationControllerImpl::LoadEntry (this=this@entry=0xbfe530, entry=...)
    at /home/apol/devel/frameworks/qt5/qtwebengine/src/3rdparty/chromium/content/browser/frame_host/navigation_controller_impl.cc:454
#13 0x00007fffeadd1f96 in content::NavigationControllerImpl::LoadURLWithParams (this=0xbfe530, params=...)
    at /home/apol/devel/frameworks/qt5/qtwebengine/src/3rdparty/chromium/content/browser/frame_host/navigation_controller_impl.cc:822
#14 0x00007fffea204ab0 in QtWebEngineCore::WebContentsAdapter::load (this=<optimized out>, url=...) at /home/apol/devel/frameworks/qt5/qtwebengine/src/core/web_contents_adapter.cpp:508
#15 0x00007ffff76c3e5d in Akregator::ArticleViewerWidget::openUrl (this=0xbaad40, url=...) at /home/apol/devel/frameworks/kdepim/akregator/src/articleviewerwidget.cpp:205
#16 0x00007ffff76c3cc8 in Akregator::ArticleViewerWidget::showArticle (this=0xbaad40, article=...) at /home/apol/devel/frameworks/kdepim/akregator/src/articleviewerwidget.cpp:194
#17 0x00007fffc259ec8e in Akregator::MainWidget::slotArticleSelected (this=0xb53950, article=...) at /home/apol/devel/frameworks/kdepim/akregator/src/mainwidget.cpp:887
#18 0x00007fffc25aa585 in QtPrivate::FunctorCall<QtPrivate::IndexesList<0>, QtPrivate::List<Akregator::Article const&>, void, void (Akregator::MainWidget::*)(Akregator::Article const&)>::call (
    f=(void (Akregator::MainWidget::*)(Akregator::MainWidget * const, const Akregator::Article &)) 0x7fffc259eaa0 <Akregator::MainWidget::slotArticleSelected(Akregator::Article const&)>, 
    o=0xb53950, arg=0x7fffffffc970) at /home/apol/devel/kde5/include/QtCore/qobjectdefs_impl.h:141
#19 0x00007fffc25aa4f0 in QtPrivate::FunctionPointer<void (Akregator::MainWidget::*)(Akregator::Article const&)>::call<QtPrivate::List<Akregator::Article const&>, void> (f=
    (void (Akregator::MainWidget::*)(Akregator::MainWidget * const, const Akregator::Article &)) 0x7fffc259eaa0 <Akregator::MainWidget::slotArticleSelected(Akregator::Article const&)>, 
    o=0xb53950, arg=0x7fffffffc970) at /home/apol/devel/kde5/include/QtCore/qobjectdefs_impl.h:160
#20 0x00007fffc25aa426 in QtPrivate::QSlotObject<void (Akregator::MainWidget::*)(Akregator::Article const&), QtPrivate::List<Akregator::Article const&>, void>::impl (which=1, this_=0xb70e60, 
---Type <return> to continue, or q <return> to quit---
    r=0xb53950, a=0x7fffffffc970, ret=0x0) at /home/apol/devel/kde5/include/QtCore/qobject_impl.h:120
#21 0x00007ffff1fbc4de in QtPrivate::QSlotObjectBase::call (a=0x7fffffffc970, r=0xb53950, this=<optimized out>)
    at ../../include/QtCore/../../../../frameworks/qt5/qtbase/src/corelib/kernel/qobject_impl.h:101
#22 QMetaObject::activate (sender=0xba7d50, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>)
    at /home/apol/devel/frameworks/qt5/qtbase/src/corelib/kernel/qobject.cpp:3723
#23 0x00007fffc25b58af in Akregator::AbstractSelectionController::currentArticleChanged (this=0xba7d50, _t1=...) at akregator/src/moc_abstractselectioncontroller.cpp:178
#24 0x00007fffc255933d in Akregator::SelectionController::articleSelectionChanged (this=0xba7d50) at /home/apol/devel/frameworks/kdepim/akregator/src/selectioncontroller.cpp:297
#25 0x00007fffc255bd1a in QtPrivate::FunctorCall<QtPrivate::IndexesList<>, QtPrivate::List<>, void, void (Akregator::SelectionController::*)()>::call(void (Akregator::SelectionController::*)(), Akregator::SelectionController*, void**) (
    f=(void (Akregator::SelectionController::*)(Akregator::SelectionController * const)) 0x7fffc25592c0 <Akregator::SelectionController::articleSelectionChanged()>, o=0xba7d50, 
    arg=0x7fffffffcc10) at /home/apol/devel/kde5/include/QtCore/qobjectdefs_impl.h:141
#26 0x00007fffc255bc90 in QtPrivate::FunctionPointer<void (Akregator::SelectionController::*)()>::call<QtPrivate::List<>, void>(void (Akregator::SelectionController::*)(), Akregator::SelectionController*, void**) (f=(void (Akregator::SelectionController::*)(Akregator::SelectionController * const)) 0x7fffc25592c0 <Akregator::SelectionController::articleSelectionChanged()>, o=0xba7d50, 
    arg=0x7fffffffcc10) at /home/apol/devel/kde5/include/QtCore/qobjectdefs_impl.h:160
#27 0x00007fffc255bbc6 in QtPrivate::QSlotObject<void (Akregator::SelectionController::*)(), QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*) (which=1, 
    this_=0x20be820, r=0xba7d50, a=0x7fffffffcc10, ret=0x0) at /home/apol/devel/kde5/include/QtCore/qobject_impl.h:120
#28 0x00007ffff1fbc4de in QtPrivate::QSlotObjectBase::call (a=0x7fffffffcc10, r=0xba7d50, this=<optimized out>)
    at ../../include/QtCore/../../../../frameworks/qt5/qtbase/src/corelib/kernel/qobject_impl.h:101
#29 QMetaObject::activate (sender=sender@entry=0x1152490, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fffffffcc10)
    at /home/apol/devel/frameworks/qt5/qtbase/src/corelib/kernel/qobject.cpp:3723
#30 0x00007ffff1fbca87 in QMetaObject::activate (sender=sender@entry=0x1152490, m=m@entry=0x7ffff21d5620 <QItemSelectionModel::staticMetaObject>, local_signal_index=local_signal_index@entry=0, 
    argv=argv@entry=0x7fffffffcc10) at /home/apol/devel/frameworks/qt5/qtbase/src/corelib/kernel/qobject.cpp:3602
#31 0x00007ffff1f453c7 in QItemSelectionModel::selectionChanged (this=this@entry=0x1152490, _t1=..., _t2=...) at .moc/moc_qitemselectionmodel.cpp:478
#32 0x00007ffff1f4977c in QItemSelectionModel::emitSelectionChanged (this=this@entry=0x1152490, newSelection=..., oldSelection=...)
    at /home/apol/devel/frameworks/qt5/qtbase/src/corelib/itemmodels/qitemselectionmodel.cpp:1867
#33 0x00007ffff1f4d10a in QItemSelectionModel::select (this=0x1152490, selection=..., command=...) at /home/apol/devel/frameworks/qt5/qtbase/src/corelib/itemmodels/qitemselectionmodel.cpp:1298
#34 0x00007ffff2c3c43d in QTreeViewPrivate::select (this=this@entry=0xb9d230, topIndex=..., bottomIndex=..., command=..., command@entry=...)
    at /home/apol/devel/frameworks/qt5/qtbase/src/widgets/itemviews/qtreeview.cpp:3875
#35 0x00007ffff2c3ca71 in QTreeView::setSelection (this=<optimized out>, rect=..., command=...) at /home/apol/devel/frameworks/qt5/qtbase/src/widgets/itemviews/qtreeview.cpp:2370
#36 0x00007ffff2bfd14f in QAbstractItemView::mousePressEvent (this=this@entry=0xb9d1b0, event=event@entry=0x7fffffffd8b0)
    at /home/apol/devel/frameworks/qt5/qtbase/src/widgets/itemviews/qabstractitemview.cpp:1793
#37 0x00007ffff2c409e7 in QTreeView::mousePressEvent (this=0xb9d1b0, event=0x7fffffffd8b0) at /home/apol/devel/frameworks/qt5/qtbase/src/widgets/itemviews/qtreeview.cpp:1900
#38 0x00007fffc255e8b7 in Akregator::ArticleListView::mousePressEvent (this=0xb9d1b0, ev=0x7fffffffd8b0) at /home/apol/devel/frameworks/kdepim/akregator/src/articlelistview.cpp:384
#39 0x00007ffff2a0cc29 in QWidget::event (this=this@entry=0xb9d1b0, event=event@entry=0x7fffffffd8b0) at /home/apol/devel/frameworks/qt5/qtbase/src/widgets/kernel/qwidget.cpp:8774
#40 0x00007ffff2aec78e in QFrame::event (this=0xb9d1b0, e=0x7fffffffd8b0) at /home/apol/devel/frameworks/qt5/qtbase/src/widgets/widgets/qframe.cpp:550
#41 0x00007ffff2c0319c in QAbstractItemView::viewportEvent (this=this@entry=0xb9d1b0, event=event@entry=0x7fffffffd8b0)
    at /home/apol/devel/frameworks/qt5/qtbase/src/widgets/itemviews/qabstractitemview.cpp:1745
#42 0x00007ffff2c4047c in QTreeView::viewportEvent (this=0xb9d1b0, event=0x7fffffffd8b0) at /home/apol/devel/frameworks/qt5/qtbase/src/widgets/itemviews/qtreeview.cpp:1320
#43 0x00007ffff1f92100 in QCoreApplicationPrivate::sendThroughObjectEventFilters (receiver=receiver@entry=0xb9d860, event=event@entry=0x7fffffffd8b0)
    at /home/apol/devel/frameworks/qt5/qtbase/src/corelib/kernel/qcoreapplication.cpp:1099
#44 0x00007ffff29c8365 in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0xb9d860, e=0x7fffffffd8b0)
    at /home/apol/devel/frameworks/qt5/qtbase/src/widgets/kernel/qapplication.cpp:3795
---Type <return> to continue, or q <return> to quit---
#45 0x00007ffff29d004d in QApplication::notify (this=<optimized out>, receiver=0xb9d860, e=0x7fffffffd8b0) at /home/apol/devel/frameworks/qt5/qtbase/src/widgets/kernel/qapplication.cpp:3273
#46 0x00007ffff1f92368 in QCoreApplication::notifyInternal2 (receiver=receiver@entry=0xb9d860, event=event@entry=0x7fffffffd8b0)
    at /home/apol/devel/frameworks/qt5/qtbase/src/corelib/kernel/qcoreapplication.cpp:988
#47 0x00007ffff29ceafd in QCoreApplication::sendEvent (event=<optimized out>, receiver=<optimized out>)
    at ../../include/QtCore/../../../../frameworks/qt5/qtbase/src/corelib/kernel/qcoreapplication.h:231
#48 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0xb9d860, event=event@entry=0x7fffffffd8b0, alienWidget=alienWidget@entry=0xb9d860, nativeWidget=0x9601a0, 
    buttonDown=buttonDown@entry=0x7ffff2eaa070 <qt_button_down>, lastMouseReceiver=..., spontaneous=true) at /home/apol/devel/frameworks/qt5/qtbase/src/widgets/kernel/qapplication.cpp:2771
#49 0x00007ffff2a25d20 in QWidgetWindow::handleMouseEvent (this=this@entry=0xc3f8f0, event=event@entry=0x7fffffffdcc0)
    at /home/apol/devel/frameworks/qt5/qtbase/src/widgets/kernel/qwidgetwindow.cpp:613
#50 0x00007ffff2a283cb in QWidgetWindow::event (this=0xc3f8f0, event=0x7fffffffdcc0) at /home/apol/devel/frameworks/qt5/qtbase/src/widgets/kernel/qwidgetwindow.cpp:239
#51 0x00007ffff29c838c in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0xc3f8f0, e=0x7fffffffdcc0)
    at /home/apol/devel/frameworks/qt5/qtbase/src/widgets/kernel/qapplication.cpp:3799
#52 0x00007ffff29cf511 in QApplication::notify (this=0x7fffffffe160, receiver=0xc3f8f0, e=0x7fffffffdcc0) at /home/apol/devel/frameworks/qt5/qtbase/src/widgets/kernel/qapplication.cpp:3556
#53 0x00007ffff1f92368 in QCoreApplication::notifyInternal2 (receiver=receiver@entry=0xc3f8f0, event=event@entry=0x7fffffffdcc0)
    at /home/apol/devel/frameworks/qt5/qtbase/src/corelib/kernel/qcoreapplication.cpp:988
#54 0x00007ffff22e0e63 in QCoreApplication::sendSpontaneousEvent (event=0x7fffffffdcc0, receiver=0xc3f8f0)
    at ../../include/QtCore/../../../../frameworks/qt5/qtbase/src/corelib/kernel/qcoreapplication.h:234
#55 QGuiApplicationPrivate::processMouseEvent (e=0x1cfc500) at /home/apol/devel/frameworks/qt5/qtbase/src/gui/kernel/qguiapplication.cpp:1909
#56 0x00007ffff22e2895 in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x1cfc500) at /home/apol/devel/frameworks/qt5/qtbase/src/gui/kernel/qguiapplication.cpp:1693
#57 0x00007ffff22c209b in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at /home/apol/devel/frameworks/qt5/qtbase/src/gui/kernel/qwindowsysteminterface.cpp:654
#58 0x00007fffcd9a7a80 in userEventSourceDispatch (source=<optimized out>) at /home/apol/devel/frameworks/qt5/qtbase/src/platformsupport/eventdispatchers/qeventdispatcher_glib.cpp:76
#59 0x00007fffe194fdd7 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#60 0x00007fffe1950040 in ?? () from /usr/lib/libglib-2.0.so.0
#61 0x00007fffe19500ec in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#62 0x00007ffff1fe39df in QEventDispatcherGlib::processEvents (this=0x680c60, flags=...) at /home/apol/devel/frameworks/qt5/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:423
#63 0x00007ffff1f908ea in QEventLoop::exec (this=this@entry=0x7fffffffe040, flags=..., flags@entry=...) at /home/apol/devel/frameworks/qt5/qtbase/src/corelib/kernel/qeventloop.cpp:210
#64 0x00007ffff1f989ed in QCoreApplication::exec () at /home/apol/devel/frameworks/qt5/qtbase/src/corelib/kernel/qcoreapplication.cpp:1261
#65 0x000000000040a036 in main (argc=1, argv=0x7fffffffe278) at /home/apol/devel/frameworks/kdepim/akregator/src/main.cpp:117
(gdb)

Reproducible: Sometimes