Application: gwenview (16.08.2) Qt Version: 5.6.1 Frameworks Version: 5.26.0 Operating System: Linux 4.4.27-2-default x86_64 Distribution: "openSUSE Leap 42.2" -- Information about the crash: - What I was doing when the application crashed: When I magnify an image in gwenview it often, but not always crashes. The crash can be reproduced sometimes. -- Backtrace: Application: Gwenview (gwenview), signal: Segmentation fault Using host libthread_db library "/lib64/libthread_db.so.1". [Current thread is 1 (Thread 0x7fc24bb679c0 (LWP 22384))] Thread 3 (Thread 0x7fc231420700 (LWP 22386)): #0 0x00007fc2402167b9 in g_mutex_lock () at /usr/lib64/libglib-2.0.so.0 #1 0x00007fc2401d4969 in g_main_context_prepare () at /usr/lib64/libglib-2.0.so.0 #2 0x00007fc2401d5230 in () at /usr/lib64/libglib-2.0.so.0 #3 0x00007fc2401d542c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0 #4 0x00007fc246dfb32b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #5 0x00007fc246da8fdb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #6 0x00007fc246be3f1a in QThread::exec() () at /usr/lib64/libQt5Core.so.5 #7 0x00007fc2461981d5 in () at /usr/lib64/libQt5DBus.so.5 #8 0x00007fc246be89e9 in () at /usr/lib64/libQt5Core.so.5 #9 0x00007fc2406f9734 in start_thread () at /lib64/libpthread.so.0 #10 0x00007fc2464f2d3d in clone () at /lib64/libc.so.6 Thread 2 (Thread 0x7fc233420700 (LWP 22385)): #0 0x00007fc2464ea49d in poll () at /lib64/libc.so.6 #1 0x00007fc23e2543e2 in () at /usr/lib64/libxcb.so.1 #2 0x00007fc23e255fcf in xcb_wait_for_event () at /usr/lib64/libxcb.so.1 #3 0x00007fc23578a839 in () at /usr/lib64/libQt5XcbQpa.so.5 #4 0x00007fc246be89e9 in () at /usr/lib64/libQt5Core.so.5 #5 0x00007fc2406f9734 in start_thread () at /lib64/libpthread.so.0 #6 0x00007fc2464f2d3d in clone () at /lib64/libc.so.6 Thread 1 (Thread 0x7fc24bb679c0 (LWP 22384)): [KCrash Handler] #6 0x00007fc245337cf0 in () at /usr/lib64/liblcms2.so.2 #7 0x00007fc24533e77b in () at /usr/lib64/liblcms2.so.2 #8 0x00007fc24b26aab1 in Gwenview::RasterImageView::updateFromScaler(int, int, QImage const&) () at /usr/lib64/libgwenviewlib.so.5 #9 0x00007fc246dd51c3 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5 #10 0x00007fc24b2d3611 in Gwenview::ImageScaler::scaledRect(int, int, QImage const&) () at /usr/lib64/libgwenviewlib.so.5 #11 0x00007fc24b28ed74 in Gwenview::ImageScaler::scaleRect(QRect const&) () at /usr/lib64/libgwenviewlib.so.5 #12 0x00007fc24b28efaf in Gwenview::ImageScaler::doScale() () at /usr/lib64/libgwenviewlib.so.5 #13 0x00007fc24b26972c in Gwenview::RasterImageView::updateBuffer(QRegion const&) () at /usr/lib64/libgwenviewlib.so.5 #14 0x00007fc24b269863 in Gwenview::RasterImageView::onZoomChanged() () at /usr/lib64/libgwenviewlib.so.5 #15 0x00007fc24b25c15f in () at /usr/lib64/libgwenviewlib.so.5 #16 0x00007fc24b2641c3 in Gwenview::DocumentView::setZoom(double) () at /usr/lib64/libgwenviewlib.so.5 #17 0x00007fc246dd51c3 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5 #18 0x00007fc24b2d3d60 in Gwenview::ZoomWidget::zoomChanged(double) () at /usr/lib64/libgwenviewlib.so.5 #19 0x00007fc24b2c3cf3 in Gwenview::ZoomWidget::slotZoomSliderActionTriggered() () at /usr/lib64/libgwenviewlib.so.5 #20 0x00007fc246dd4bb1 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5 #21 0x00007fc24858f381 in QAbstractSlider::actionTriggered(int) () at /usr/lib64/libQt5Widgets.so.5 #22 0x00007fc24858f9b9 in QAbstractSlider::triggerAction(QAbstractSlider::SliderAction) () at /usr/lib64/libQt5Widgets.so.5 #23 0x00007fc248623418 in QSlider::mouseMoveEvent(QMouseEvent*) () at /usr/lib64/libQt5Widgets.so.5 #24 0x00007fc2484d784e in QWidget::event(QEvent*) () at /usr/lib64/libQt5Widgets.so.5 #25 0x00007fc248623a66 in QSlider::event(QEvent*) () at /usr/lib64/libQt5Widgets.so.5 #26 0x00007fc248495e3c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5 #27 0x00007fc24849ad14 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5 #28 0x00007fc246daafc5 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5 #29 0x00007fc248499a10 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () at /usr/lib64/libQt5Widgets.so.5 #30 0x00007fc2484f0911 in () at /usr/lib64/libQt5Widgets.so.5 #31 0x00007fc2484f2eb3 in () at /usr/lib64/libQt5Widgets.so.5 #32 0x00007fc248495e3c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5 #33 0x00007fc24849a49a in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5 #34 0x00007fc246daafc5 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5 #35 0x00007fc2472ff68b in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () at /usr/lib64/libQt5Gui.so.5 #36 0x00007fc247300e05 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /usr/lib64/libQt5Gui.so.5 #37 0x00007fc2472e2eeb in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Gui.so.5 #38 0x00007fc2357b7bc0 in () at /usr/lib64/libQt5XcbQpa.so.5 #39 0x00007fc2401d5134 in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0 #40 0x00007fc2401d5388 in () at /usr/lib64/libglib-2.0.so.0 #41 0x00007fc2401d542c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0 #42 0x00007fc246dfb30c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #43 0x00007fc246da8fdb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #44 0x00007fc246db0ec6 in QCoreApplication::exec() () at /usr/lib64/libQt5Core.so.5 #45 0x000000000043431b in () #46 0x00007fc2464296e5 in __libc_start_main () at /lib64/libc.so.6 #47 0x0000000000434619 in _start () Reported using DrKonqi
It seems to only happen if I use the slider widget in the bottom left. Control + mouse wheel does not crash.
Furthermore it only seems to happen with grayscale (png) images. With rgb png I cannot reproduce the crash, regardless of mousewheel or slider.
Hello. Can you please share an image which leads to crash ? I will test it on my then.
Created attachment 102319 [details] Test image Hello. I just did reproduce a bug and it caused a crash. All you need is to use a slider on UI with an grayscale image. Gwenview Version 16.04.3 Kubuntu 16.10 KDE Plasma Version : 5.7.5 KDE Frameworks Version : 5.26.0 Qt Version : 5.6.1 Kernel Version : 4.8.0-22-generic OS Type: 64-bit
*** This bug has been marked as a duplicate of bug 357548 ***