Application: krita (2.3 Alpha 1)
KDE Platform Version: 4.4.2 (KDE 4.4.2)
Qt Version: 4.6.3
Operating System: Linux 2.6.32-23-generic x86_64
Distribution: Ubuntu 10.04 LTS

-- Information about the crash:
I was testing the smudge tool, at big size (>200px), and did see it made some blocky artefacts. then it crashed while I was using it.

The crash can be reproduced some of the time.

 -- Backtrace:
Application: Krita (krita), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f4c826157c0 (LWP 9554))]

Thread 3 (Thread 0x7f4c6ebc1710 (LWP 9555)):
#0  0x00007f4c81cba85c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007f4c81f46fdb in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#2  0x00007f4c81f42d64 in QSemaphore::acquire(int) () from /usr/lib/libQtCore.so.4
#3  0x00007f4c81493efe in KisTileDataPooler::waitForWork (this=0x7f4c817f6000) at /home/timo/kde4/src/koffice/krita/image/tiles3/kis_tile_data_pooler.cc:129
#4  0x00007f4c814940d8 in KisTileDataPooler::run (this=0x7f4c817f6000) at /home/timo/kde4/src/koffice/krita/image/tiles3/kis_tile_data_pooler.cc:158
#5  0x00007f4c81f45f95 in ?? () from /usr/lib/libQtCore.so.4
#6  0x00007f4c81cb59ca in start_thread () from /lib/libpthread.so.0
#7  0x00007f4c7a1b76fd in clone () from /lib/libc.so.6
#8  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f4c4e6d9710 (LWP 10048)):
[KCrash Handler]
#5  0x00007f4c8152e954 in KisSharedPtr<KisNode>::operator== (this=<value optimized out>, node=) at /home/timo/kde4/src/koffice/krita/image/kis_shared_ptr.h:128
#6  QList<KisSharedPtr<KisNode> >::contains (this=<value optimized out>, node=) at /usr/include/qt4/QtCore/qlist.h:760
#7  KisNode::index (this=<value optimized out>, node=) at /home/timo/kde4/src/koffice/krita/image/kis_node.cpp:179
#8  0x00007f4c8152f89d in KisNode::prevSibling (this=0x7f4c495f1700) at /home/timo/kde4/src/koffice/krita/image/kis_node.cpp:150
#9  0x00007f4c8150801f in KisMergeWalker::startTrip (this=0x1296c1a0, startWith=) at /home/timo/kde4/src/koffice/krita/image/kis_merge_walker.cc:40
#10 0x00007f4c8150d179 in KisBaseRectsWalker::collectRects (this=0x7f4c49941e10, node=<value optimized out>, rc=<value optimized out>, cropRect=<value optimized out>)
    at /home/timo/kde4/src/koffice/krita/image/kis_base_rects_walker.h:84
#11 KisSimpleUpdateQueue::addJob (this=0x7f4c49941e10, node=<value optimized out>, rc=<value optimized out>, cropRect=<value optimized out>)
    at /home/timo/kde4/src/koffice/krita/image/kis_simple_update_queue.cpp:106
#12 0x00007f4c8150e342 in KisUpdateScheduler::updateProjection (this=0x7f4c4bc2e9c0, node=<value optimized out>, rc=...) at /home/timo/kde4/src/koffice/krita/image/kis_update_scheduler.cpp:52
#13 0x00007f4c815163e3 in KisImage::updateProjection (this=<value optimized out>, node=) at /home/timo/kde4/src/koffice/krita/image/kis_image.cc:1075
#14 0x00007f4c81526276 in KisLayer::setDirty (this=0x7f4c495f1700, rect=...) at /home/timo/kde4/src/koffice/krita/image/kis_layer.cc:224
#15 0x00007f4c81530239 in KisNode::setDirty (this=0x7f4c495f1700, region=...) at /home/timo/kde4/src/koffice/krita/image/kis_node.cpp:303
#16 0x00007f4c819e8e20 in KisToolFreehand::setDirty (this=0x7f4c49f7cb80, region=...) at /home/timo/kde4/src/koffice/krita/ui/tool/kis_tool_freehand.cc:510
#17 0x00007f4c819ee7ce in FreehandPaintBezierJob::run (this=0x7f4c14196860) at /home/timo/kde4/src/koffice/krita/ui/tool/kis_tool_freehand_p.cpp:111
#18 0x00007f4c81f3be7f in ?? () from /usr/lib/libQtCore.so.4
#19 0x00007f4c81f45f95 in ?? () from /usr/lib/libQtCore.so.4
#20 0x00007f4c81cb59ca in start_thread () from /lib/libpthread.so.0
#21 0x00007f4c7a1b76fd in clone () from /lib/libc.so.6
#22 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f4c826157c0 (LWP 9554)):
#0  0x00007f4c7a1aaf83 in poll () from /lib/libc.so.6
#1  0x00007f4c758be29a in ?? () from /usr/lib/libxcb.so.1
#2  0x00007f4c758be7d7 in ?? () from /usr/lib/libxcb.so.1
#3  0x00007f4c758bea85 in xcb_writev () from /usr/lib/libxcb.so.1
#4  0x00007f4c7fd496fa in _XSend () from /usr/lib/libX11.so.6
#5  0x00007f4c7fd49839 in _XReply () from /usr/lib/libX11.so.6
#6  0x00007f4c804f8e44 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#7  0x00007f4c804d3c81 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#8  0x00007f4c804a83a1 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#9  0x00007f4c804a9170 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#10 0x00007f4c76c61a0b in ?? () from /usr/lib/nvidia-current/libGLcore.so.1
#11 0x00007f4c76c61ddb in ?? () from /usr/lib/nvidia-current/libGLcore.so.1
#12 0x00007f4c7698d82f in ?? () from /usr/lib/nvidia-current/libGLcore.so.1
#13 0x00007f4c76991b51 in ?? () from /usr/lib/nvidia-current/libGLcore.so.1
#14 0x00007f4c7697284a in ?? () from /usr/lib/nvidia-current/libGLcore.so.1
#15 0x00007f4c7697bac8 in ?? () from /usr/lib/nvidia-current/libGLcore.so.1
#16 0x00007f4c804a79e3 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#17 0x00007f4c804cfeb7 in glXSwapBuffers () from /usr/lib/nvidia-current/libGL.so.1
#18 0x00007f4c7f072f0f in QGLContext::swapBuffers() const () from /usr/lib/libQtOpenGL.so.4
#19 0x00007f4c7f0292ca in ?? () from /usr/lib/libQtOpenGL.so.4
#20 0x00007f4c7f062a29 in QGL2PaintEngineEx::end() () from /usr/lib/libQtOpenGL.so.4
#21 0x00007f4c7b88dc99 in QPainter::end() () from /usr/lib/libQtGui.so.4
#22 0x00007f4c819d1c3f in KisOpenGLCanvas2::paintEvent (this=0x7f4c383b85c0) at /home/timo/kde4/src/koffice/krita/ui/opengl/kis_opengl_canvas2.cpp:153
#23 0x00007f4c7b78baf2 in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#24 0x00007f4c7f01b281 in QGLWidget::event(QEvent*) () from /usr/lib/libQtOpenGL.so.4
#25 0x00007f4c7b735c0c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#26 0x00007f4c7b73c0eb in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#27 0x00007f4c7c444526 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#28 0x00007f4c82035d9c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#29 0x00007f4c7b7940ed in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () from /usr/lib/libQtGui.so.4
#30 0x00007f4c7b94cffc in QWidgetPrivate::repaint_sys(QRegion const&) () from /usr/lib/libQtGui.so.4
#31 0x00007f4c7b785a04 in QWidgetPrivate::syncBackingStore() () from /usr/lib/libQtGui.so.4
#32 0x00007f4c7b78c1f5 in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#33 0x00007f4c7f01b281 in QGLWidget::event(QEvent*) () from /usr/lib/libQtOpenGL.so.4
#34 0x00007f4c7b735c0c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#35 0x00007f4c7b73c0eb in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#36 0x00007f4c7c444526 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#37 0x00007f4c82035d9c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#38 0x00007f4c82039454 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQtCore.so.4
#39 0x00007f4c82062ca0 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#40 0x00007f4c7b7e6f77 in ?? () from /usr/lib/libQtGui.so.4
#41 0x00007f4c820346c2 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#42 0x00007f4c82034a9c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#43 0x00007f4c8203973b in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#44 0x00007f4c8234f105 in kdemain (argc=<value optimized out>, argv=<value optimized out>) at /home/timo/kde4/src/koffice/krita/main.cc:49
#45 0x00007f4c7a0efc4d in __libc_start_main () from /lib/libc.so.6
#46 0x00000000004008e9 in _start ()

This bug may be a duplicate of or related to bug 229012.

Possible duplicates by query: bug 244763, bug 235278.

Reported using DrKonqi