Application: kamoso (1.0.1)
KDE Platform Version: 4.5.1 (KDE 4.5.1)
Qt Version: 4.7.0
Operating System: Linux 2.6.35-22-generic x86_64
Distribution: Ubuntu 10.10

-- Information about the crash:
Title is clear enough. Bug is observed in git commit # 1be69f3c0065ca6158269f389ef9e148f2e9d066

To reproduce in my system, compile kamoso, open it without a webcam connected and press the "Take picture" button. Program crashes after the 3-seconds delay.

The crash can be reproduced every time.

-- Backtrace:
Application: Kamoso (kamoso), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fba91aaa760 (LWP 28156))]

Thread 10 (Thread 0x7fba47f59710 (LWP 28160)):
#0  0x00007fba8da08a9c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007fba8fafc262 in ?? () from /usr/lib/libvlccore.so.4
#2  0x00007fba8da04971 in start_thread () from /lib/libpthread.so.0
#3  0x00007fba8c2d991d in clone () from /lib/libc.so.6
#4  0x0000000000000000 in ?? ()

Thread 9 (Thread 0x7fba453b8710 (LWP 28161)):
#0  0x00007fba8da08e09 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007fba475180d1 in ?? () from /usr/lib/libxine.so.1
#2  0x00007fba8da04971 in start_thread () from /lib/libpthread.so.0
#3  0x00007fba8c2d991d in clone () from /lib/libc.so.6
#4  0x0000000000000000 in ?? ()

Thread 8 (Thread 0x7fba44bb7710 (LWP 28162)):
#0  0xffffffffff60017b in ?? ()
#1  0x00007fba44bb6a70 in ?? ()
#2  0x00007fff9ab50852 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 7 (Thread 0x7fba3bffe710 (LWP 28163)):
#0  0x00007fba8c2cd1d3 in poll () from /lib/libc.so.6
#1  0x00007fba89a4940f in ?? () from /usr/lib/libpulse.so.0
#2  0x00007fba89a38d76 in pa_mainloop_poll () from /usr/lib/libpulse.so.0
#3  0x00007fba89a3a7f9 in pa_mainloop_iterate () from /usr/lib/libpulse.so.0
#4  0x00007fba89a3a8b0 in pa_mainloop_run () from /usr/lib/libpulse.so.0
#5  0x00007fba89a4920b in ?? () from /usr/lib/libpulse.so.0
#6  0x00007fba860ebfb8 in ?? () from /usr/lib/libpulsecommon-0.9.21.so
#7  0x00007fba8da04971 in start_thread () from /lib/libpthread.so.0
#8  0x00007fba8c2d991d in clone () from /lib/libc.so.6
#9  0x0000000000000000 in ?? ()

Thread 6 (Thread 0x7fba377fc710 (LWP 28164)):
#0  0x00007fba8da08a9c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007fba47528e83 in ?? () from /usr/lib/libxine.so.1
#2  0x00007fba8da04971 in start_thread () from /lib/libpthread.so.0
#3  0x00007fba8c2d991d in clone () from /lib/libc.so.6
#4  0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7fba369d6710 (LWP 28165)):
#0  0x00007fba8c2d22b3 in select () from /lib/libc.so.6
#1  0x00007fba47541385 in xine_usec_sleep () from /usr/lib/libxine.so.1
#2  0x00007fba47525d09 in ?? () from /usr/lib/libxine.so.1
#3  0x00007fba8da04971 in start_thread () from /lib/libpthread.so.0
#4  0x00007fba8c2d991d in clone () from /lib/libc.so.6
#5  0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7fba35dec710 (LWP 28166)):
#0  0x00007fba8da08a9c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007fba4751b98b in ?? () from /usr/lib/libxine.so.1
#2  0x00007fba47521a2d in ?? () from /usr/lib/libxine.so.1
#3  0x00007fba8da04971 in start_thread () from /lib/libpthread.so.0
#4  0x00007fba8c2d991d in clone () from /lib/libc.so.6
#5  0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7fba3541e710 (LWP 28167)):
#0  0x00007fba8da08a9c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007fba4751b98b in ?? () from /usr/lib/libxine.so.1
#2  0x00007fba47522a85 in ?? () from /usr/lib/libxine.so.1
#3  0x00007fba8da04971 in start_thread () from /lib/libpthread.so.0
#4  0x00007fba8c2d991d in clone () from /lib/libc.so.6
#5  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fba34c1d710 (LWP 28168)):
#0  0x00007fba8da08a9c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007fba4752c00b in ?? () from /usr/lib/libxine.so.1
#2  0x00007fba8da04971 in start_thread () from /lib/libpthread.so.0
#3  0x00007fba8c2d991d in clone () from /lib/libc.so.6
#4  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fba91aaa760 (LWP 28156)):
[KCrash Handler]
#6  0x00007fba8e3c879b in KConfigBase::group(QString const&) () from /usr/lib/libkdecore.so.5
#7  0x00000000004235ba in Device::brightness (this=<value optimized out>) at /opt/builds/kamoso/src/device.cpp:111
#8  0x00000000004202a3 in WebcamWidget::playing (this=0x9cb860) at /opt/builds/kamoso/src/webcamwidget.cpp:204
#9  0x000000000042197c in WebcamWidget::takePhoto (this=0x7fff9aa2c7c0, dest=...) at /opt/builds/kamoso/src/webcamwidget.cpp:236
#10 0x000000000041708b in Kamoso::takePhoto (this=0x9ea5c0) at /opt/builds/kamoso/src/kamoso.cpp:459
#11 0x0000000000412463 in Kamoso::qt_metacall (this=0x9ea5c0, _c=QMetaObject::InvokeMetaMethod, _id=10268640, _a=0x7fff9aa2ca80) at /opt/builds/kamoso/src/moc_kamoso.cpp:124
#12 0x00007fba8dd9ab27 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#13 0x0000000000412808 in CountdownWidget::qt_metacall (this=0xa461a0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff9aa2cb90) at /opt/builds/kamoso/src/moc_countdownwidget.cpp:76
#14 0x00007fba8dd9ab27 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#15 0x00007fba8dd948f9 in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#16 0x00007fba8ceccfdc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#17 0x00007fba8ced2aed in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#18 0x00007fba914bd156 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#19 0x00007fba8dd82cdc in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#20 0x00007fba8ddb26f2 in ?? () from /usr/lib/libQtCore.so.4
#21 0x00007fba8ddaf4c8 in ?? () from /usr/lib/libQtCore.so.4
#22 0x00007fba87c13342 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#23 0x00007fba87c172a8 in ?? () from /lib/libglib-2.0.so.0
#24 0x00007fba87c1745c in g_main_context_iteration () from /lib/libglib-2.0.so.0
#25 0x00007fba8ddaf193 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#26 0x00007fba8cf7fa4e in ?? () from /usr/lib/libQtGui.so.4
#27 0x00007fba8dd81a02 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#28 0x00007fba8dd81dec in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#29 0x00007fba8dd85ebb in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#30 0x000000000041e219 in main (argc=<value optimized out>, argv=<value optimized out>) at /opt/builds/kamoso/src/main.cpp:39

Reported using DrKonqi