Bug 398555

Running Gentoo x86, Falkon 3.0.1 and Qt 5.9.6, Falkon crashes when started (not on amd64!). Until some updates I did lately (including Qt and LXQt), everything was fine, but I don't know which change cased the issue.

I'd really like to track this down, perhaps also a Gentoo specific problem is involved.

The automatically produced backtrace seems to be quite useless, so here's the one produced by a manual built run by gdb:

#0  0xa877122e in ?? () from /usr/lib/dri/i915_dri.so
#1  0xa876309b in ?? () from /usr/lib/dri/i915_dri.so
#2  0xa876407d in ?? () from /usr/lib/dri/i915_dri.so
#3  0xa846a7fa in ?? () from /usr/lib/dri/i915_dri.so
#4  0xa82ba209 in ?? () from /usr/lib/dri/i915_dri.so
#5  0xaff2e758 in QSGBatchRenderer::Renderer::renderBatches() () from /usr/lib/libQt5Quick.so.5
#6  0xaff34348 in QSGBatchRenderer::Renderer::render() () from /usr/lib/libQt5Quick.so.5
#7  0xaff23870 in QSGRenderer::renderScene(QSGBindable const&) () from /usr/lib/libQt5Quick.so.5
#8  0xaff23e00 in QSGRenderer::renderScene(unsigned int) () from /usr/lib/libQt5Quick.so.5
#9  0xaff6386a in QSGDefaultRenderContext::renderNextFrame(QSGRenderer*, unsigned int) ()
   from /usr/lib/libQt5Quick.so.5
#10 0xaffc8d22 in QQuickWindowPrivate::renderSceneGraph(QSize const&) ()
   from /usr/lib/libQt5Quick.so.5
#11 0xb009132a in QQuickRenderControl::render() () from /usr/lib/libQt5Quick.so.5
#12 0xb09e8c4f in ?? () from /usr/lib/libQt5QuickWidgets.so.5
#13 0xb09ec16b in QQuickWidget::resizeEvent(QResizeEvent*) () from /usr/lib/libQt5QuickWidgets.so.5
#14 0xb7ba6b2b in ?? () from /usr/lib/libQt5WebEngineWidgets.so.5
#15 0xb03f2564 in QWidget::event(QEvent*) () from /usr/lib/libQt5Widgets.so.5
#16 0xb09eceea in QQuickWidget::event(QEvent*) () from /usr/lib/libQt5QuickWidgets.so.5
#17 0xb7ba6e72 in ?? () from /usr/lib/libQt5WebEngineWidgets.so.5
#18 0xb03ad28a in QApplicationPrivate::notify_helper(QObject*, QEvent*) ()
   from /usr/lib/libQt5Widgets.so.5
#19 0xb03b53f7 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5
#20 0xaecca302 in QCoreApplication::notifyInternal2(QObject*, QEvent*) ()
   from /usr/lib/libQt5Core.so.5
#21 0xb03e9e9f in QWidgetPrivate::sendPendingMoveAndResizeEvents(bool, bool) ()
   from /usr/lib/libQt5Widgets.so.5
#22 0xb03ee116 in QWidgetPrivate::show_helper() () from /usr/lib/libQt5Widgets.so.5
#23 0xb03edf31 in QWidgetPrivate::show_recursive() () from /usr/lib/libQt5Widgets.so.5
#24 0xb03ee000 in QWidgetPrivate::showChildren(bool) () from /usr/lib/libQt5Widgets.so.5
#25 0xb03ee12d in QWidgetPrivate::show_helper() () from /usr/lib/libQt5Widgets.so.5
#26 0xb03f1449 in QWidget::setVisible(bool) () from /usr/lib/libQt5Widgets.so.5
#27 0xb03ede80 in QWidget::show() () from /usr/lib/libQt5Widgets.so.5
#28 0xb03ee054 in QWidgetPrivate::showChildren(bool) () from /usr/lib/libQt5Widgets.so.5
#29 0xb03ee12d in QWidgetPrivate::show_helper() () from /usr/lib/libQt5Widgets.so.5
#30 0xb03f1449 in QWidget::setVisible(bool) () from /usr/lib/libQt5Widgets.so.5
#31 0xb03ede80 in QWidget::show() () from /usr/lib/libQt5Widgets.so.5
#32 0xb03ee054 in QWidgetPrivate::showChildren(bool) () from /usr/lib/libQt5Widgets.so.5
#33 0xb03ee12d in QWidgetPrivate::show_helper() () from /usr/lib/libQt5Widgets.so.5
#34 0xb03f1449 in QWidget::setVisible(bool) () from /usr/lib/libQt5Widgets.so.5
#35 0xb03ede80 in QWidget::show() () from /usr/lib/libQt5Widgets.so.5
#36 0xb03ee054 in QWidgetPrivate::showChildren(bool) () from /usr/lib/libQt5Widgets.so.5
#37 0xb03ee12d in QWidgetPrivate::show_helper() () from /usr/lib/libQt5Widgets.so.5
#38 0xb03f1449 in QWidget::setVisible(bool) () from /usr/lib/libQt5Widgets.so.5
#39 0xb03ede80 in QWidget::show() () from /usr/lib/libQt5Widgets.so.5
#40 0xb03d2b14 in QStackedLayout::setCurrentIndex(int) () from /usr/lib/libQt5Widgets.so.5
#41 0xb03d3315 in QStackedLayout::insertWidget(int, QWidget*) () from /usr/lib/libQt5Widgets.so.5
#42 0xb057f739 in QStackedWidget::insertWidget(int, QWidget*) () from /usr/lib/libQt5Widgets.so.5
#43 0xb7e07b07 in TabStackedWidget::insertTab(int, QWidget*, QString const&, bool) ()
   from /home/tobias/tmp/falkon-3.0.1/build/bin/libFalkonPrivate.so.3
#44 0xb7e0a2cd in TabWidget::addView(LoadRequest const&, QString const&, QFlags<Qz::NewTabPositionFlag> const&, bool, int, bool) () from /home/tobias/tmp/falkon-3.0.1/build/bin/libFalkonPrivate.so.3
#45 0xb7e09fa9 in TabWidget::addView(LoadRequest const&, QFlags<Qz::NewTabPositionFlag> const&, bool, bool) () from /home/tobias/tmp/falkon-3.0.1/build/bin/libFalkonPrivate.so.3
#46 0xb7cb6ae8 in BrowserWindow::postLaunch() ()
   from /home/tobias/tmp/falkon-3.0.1/build/bin/libFalkonPrivate.so.3
#47 0xb7e67ddc in BrowserWindow::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) ()
   from /home/tobias/tmp/falkon-3.0.1/build/bin/libFalkonPrivate.so.3
#48 0xaecf28d0 in QMetaCallEvent::placeMetaCall(QObject*) () from /usr/lib/libQt5Core.so.5
#49 0xaecf6283 in QObject::event(QEvent*) () from /usr/lib/libQt5Core.so.5
#50 0xb03f222d in QWidget::event(QEvent*) () from /usr/lib/libQt5Widgets.so.5
#51 0xb051f8c7 in QMainWindow::event(QEvent*) () from /usr/lib/libQt5Widgets.so.5
#52 0xb7cbd010 in BrowserWindow::event(QEvent*) ()
   from /home/tobias/tmp/falkon-3.0.1/build/bin/libFalkonPrivate.so.3
#53 0xb03ad28a in QApplicationPrivate::notify_helper(QObject*, QEvent*) ()
   from /usr/lib/libQt5Widgets.so.5
#54 0xb03b53f7 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5
#55 0xaecca302 in QCoreApplication::notifyInternal2(QObject*, QEvent*) ()
   from /usr/lib/libQt5Core.so.5
#56 0xaecccca0 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) ()
   from /usr/lib/libQt5Core.so.5
#57 0xaeccd1a7 in QCoreApplication::sendPostedEvents(QObject*, int) ()
   from /usr/lib/libQt5Core.so.5
#58 0xaed22113 in ?? () from /usr/lib/libQt5Core.so.5
#59 0xae4c43b9 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#60 0xae4c4659 in ?? () from /usr/lib/libglib-2.0.so.0
#61 0xae4c4724 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#62 0xaed21e23 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/libQt5Core.so.5
#63 0xa9b03061 in ?? () from /usr/lib/libQt5XcbQpa.so.5
#64 0xaecc8dbf in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/libQt5Core.so.5
#65 0xaecd1f9d in QCoreApplication::exec() () from /usr/lib/libQt5Core.so.5
#66 0xaf0c4a31 in QGuiApplication::exec() () from /usr/lib/libQt5Gui.so.5
#67 0xb03ad1e4 in QApplication::exec() () from /usr/lib/libQt5Widgets.so.5
#68 0x00403a44 in main ()