Application: krita (2.4 Alpha 1)
KDE Platform Version: 4.5.5 (KDE 4.5.5)
Qt Version: 4.7.0
Operating System: Linux 2.6.35-28-generic x86_64
Distribution: Ubuntu 10.10

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

Testing krita-ui_improvements-silvioheinrich

Open Krita, create new document, select sketch brush , try to draw : crash
(only if I do select other things before, like change blending mode, presets, other brush engines, then select sketch brush it doesn't crash.. only if I select it at first)

The crash can be reproduced every time.

-- Backtrace:
Application: Krita (krita), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f4fbb63d7a0 (LWP 15040))]

Thread 5 (Thread 0x7f4fa8e6b700 (LWP 15041)):
#0  0x00007f4fb2c67a73 in g_main_context_query () from /lib/libglib-2.0.so.0
#1  0x00007f4fb2c6cefc in ?? () from /lib/libglib-2.0.so.0
#2  0x00007f4fb2c6d7b5 in g_main_loop_run () from /lib/libglib-2.0.so.0
#3  0x00007f4fa95a23c4 in ?? () from /usr/lib/libgio-2.0.so.0
#4  0x00007f4fb2c927e4 in ?? () from /lib/libglib-2.0.so.0
#5  0x00007f4fb97c0953 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#6  0x00007f4fbabb3971 in start_thread () from /lib/libpthread.so.0
#7  0x00007f4fb381a92d in clone () from /lib/libc.so.6
#8  0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f4f8deff700 (LWP 15052)):
#0  0x00007f4fbabb7e09 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007f4fbae3eda2 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#2  0x00007f4fbae33da2 in ?? () from /usr/lib/libQtCore.so.4
#3  0x00007f4fbae3e27e in ?? () from /usr/lib/libQtCore.so.4
#4  0x00007f4fb97c0953 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#5  0x00007f4fbabb3971 in start_thread () from /lib/libpthread.so.0
#6  0x00007f4fb381a92d in clone () from /lib/libc.so.6
#7  0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f4f8213d700 (LWP 15053)):
#0  0x00007f4fbabb7e09 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007f4fbae3eda2 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#2  0x00007f4fbae33da2 in ?? () from /usr/lib/libQtCore.so.4
#3  0x00007f4fbae3e27e in ?? () from /usr/lib/libQtCore.so.4
#4  0x00007f4fb97c0953 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#5  0x00007f4fbabb3971 in start_thread () from /lib/libpthread.so.0
#6  0x00007f4fb381a92d in clone () from /lib/libc.so.6
#7  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f4f8113b700 (LWP 15059)):
[KCrash Handler]
#6  KisSketchPaintOp::updateBrushMask (this=0x7cfac80, info=..., scale=<value optimized out>, rotation=<value optimized out>) at /home/timo/kde4/src/calligra/krita/plugins/paintops/sketch/kis_sketch_paintop.cpp:99
#7  0x00007f4f8f1350b7 in KisSketchPaintOp::paintLine (this=0x7cfac80, pi1=<value optimized out>, pi2=..., savedDist=<value optimized out>) at /home/timo/kde4/src/calligra/krita/plugins/paintops/sketch/kis_sketch_paintop.cpp:154
#8  0x00007f4fba317c42 in paintBezierCurve (paintOp=0x7cfac80, pi1=..., control1=..., control2=..., pi2=..., savedDist=...) at /home/timo/kde4/src/calligra/krita/image/brushengine/kis_paintop.cc:122
#9  0x00007f4fba317ce5 in KisPaintOp::paintBezierCurve (this=0x0, pi1=..., control1=<value optimized out>, control2=<value optimized out>, pi2=..., savedDist=...) at /home/timo/kde4/src/calligra/krita/image/brushengine/kis_paintop.cc:149
#10 0x00007f4fba30652d in KisPainter::paintBezierCurve (this=0x7b5aa50, pi1=..., control1=..., control2=..., pi2=..., savedDist=...) at /home/timo/kde4/src/calligra/krita/image/kis_painter.cc:1129
#11 0x00007f4fba8c3760 in FreehandPaintBezierJob::run (this=0x8a10ad0) at /home/timo/kde4/src/calligra/krita/ui/tool/kis_tool_freehand_p.cpp:110
#12 0x00007f4fbae33d02 in ?? () from /usr/lib/libQtCore.so.4
#13 0x00007f4fbae3e27e in ?? () from /usr/lib/libQtCore.so.4
#14 0x00007f4fb97c0953 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#15 0x00007f4fbabb3971 in start_thread () from /lib/libpthread.so.0
#16 0x00007f4fb381a92d in clone () from /lib/libc.so.6
#17 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f4fbb63d7a0 (LWP 15040)):
#0  0x00007f4fb37e9497 in sched_yield () from /lib/libc.so.6
#1  0x00007f4fb033fc9a in ?? () from /usr/lib/nvidia-current/libnvidia-glcore.so.260.19.06
#2  0x00007f4fb033fddb in ?? () from /usr/lib/nvidia-current/libnvidia-glcore.so.260.19.06
#3  0x00007f4fb02e6875 in ?? () from /usr/lib/nvidia-current/libnvidia-glcore.so.260.19.06
#4  0x00007f4fb027f018 in ?? () from /usr/lib/nvidia-current/libnvidia-glcore.so.260.19.06
#5  0x00007f4fb0260e8d in ?? () from /usr/lib/nvidia-current/libnvidia-glcore.so.260.19.06
#6  0x00007f4fb0260d41 in ?? () from /usr/lib/nvidia-current/libnvidia-glcore.so.260.19.06
#7  0x00007f4fb97a1c25 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#8  0x00007f4fbb47979c in ?? () from /lib64/ld-linux-x86-64.so.2
#9  0x00007f4fb376d4f2 in exit () from /lib/libc.so.6
#10 0x00007f4fa358a746 in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#11 0x00007f4fb5e31e98 in KApplication::xioErrhandler(_XDisplay*) () from /usr/lib/libkdeui.so.5
#12 0x00007f4fb943386e in _XIOError () from /usr/lib/libX11.so.6
#13 0x00007f4fb943b415 in ?? () from /usr/lib/libX11.so.6
#14 0x00007f4fb943bd07 in _XEventsQueued () from /usr/lib/libX11.so.6
#15 0x00007f4fb942447f in XEventsQueued () from /usr/lib/libX11.so.6
#16 0x00007f4fb5192be8 in ?? () from /usr/lib/libQtGui.so.4
#17 0x00007f4fbaf30a02 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#18 0x00007f4fbaf30dec in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#19 0x00007f4fbaf34ebb in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#20 0x00007f4fbb2682d5 in kdemain (argc=<value optimized out>, argv=<value optimized out>) at /home/timo/kde4/src/calligra/krita/main.cc:49
#21 0x00007f4fb3752d8e in __libc_start_main () from /lib/libc.so.6
#22 0x0000000000400869 in _start ()

Reported using DrKonqi