Application: kmix (3.9-plus)
KDE Platform Version: 4.7.90 (4.8 Beta2 (4.7.90) (Compiled from sources)
Qt Version: 4.7.4
Operating System: Linux 3.1.4-gentoo x86_64
Distribution: "NAME=Gentoo"

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

I am not sure I can 100% reproduce this, but it happens very often when starting or stopping an audio stream (random music player, flash-applet, whatever).

When it does NOT crash, it will likely hang and eat 100% cpu until I kill and restart kmix.

The crash can be reproduced some of the time.

-- Backtrace:
Application: KMix (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fd829fd5780 (LWP 27473))]

Thread 2 (Thread 0x7fd8069bc700 (LWP 27474)):
#0  0x00007fd827661043 in poll () from /lib64/libc.so.6
#1  0x00007fd82444a128 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007fd82444a5d9 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007fd828c49fe6 in QEventDispatcherGlib::processEvents (this=0xb3b9a0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fd828c1e7c2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fd828c1e9bf in QEventLoop::exec (this=0x7fd8069bbdd0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007fd828b3708f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007fd828c01a6f in QInotifyFileSystemWatcherEngine::run (this=0xb3b080) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007fd828b39a95 in QThreadPrivate::start (arg=0xb3b080) at thread/qthread_unix.cpp:331
#9  0x00007fd8288aae1c in start_thread () from /lib64/libpthread.so.0
#10 0x00007fd82766a6ad in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7fd829fd5780 (LWP 27473)):
[KCrash Handler]
#6  0x00007fd828f46520 in typeinfo for QAbstractAnimationPrivate () from /usr/lib64/qt4/libQtCore.so.4
#7  0x00007fd815129a87 in MDWSlider::update (this=0xaff9f0) at /var/tmp/portage/kde-base/kmix-4.7.90/work/kmix-4.7.90/kmix/gui/mdwslider.cpp:990
#8  0x00007fd815125460 in ViewDockAreaPopup::refreshVolumeLevels (this=<optimized out>) at /var/tmp/portage/kde-base/kmix-4.7.90/work/kmix-4.7.90/kmix/gui/viewdockareapopup.cpp:159
#9  0x00007fd815122331 in ViewBase::qt_metacall (this=0xae4a90, _c=QMetaObject::InvokeMetaMethod, _id=<optimized out>, _a=0x7fff4b8cb6c0) at /var/tmp/portage/kde-base/kmix-4.7.90/work/kmix-4.7.90_build/kmix/viewbase.moc:90
#10 0x00007fd815125158 in ViewDockAreaPopup::qt_metacall (this=0xae4a90, _c=QMetaObject::InvokeMetaMethod, _id=<optimized out>, _a=<optimized out>) at /var/tmp/portage/kde-base/kmix-4.7.90/work/kmix-4.7.90_build/kmix/viewdockareapopup.moc:67
#11 0x00007fd828c3208a in QMetaObject::activate (sender=0xa590c0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3278
#12 0x00007fd81513e4bc in Mixer::qt_metacall (this=0xa590c0, _c=QMetaObject::InvokeMetaMethod, _id=<optimized out>, _a=0x7fff4b8cb7a0) at /var/tmp/portage/kde-base/kmix-4.7.90/work/kmix-4.7.90_build/kmix/mixer.moc:82
#13 0x00007fd828c3208a in QMetaObject::activate (sender=0xa57b60, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3278
#14 0x00007fd815104f68 in Mixer_Backend::readSetFromHW (this=0xa57b60) at /var/tmp/portage/kde-base/kmix-4.7.90/work/kmix-4.7.90/kmix/backends/mixer_backend.cpp:155
#15 0x00007fd815112ac0 in sink_input_cb (c=<optimized out>, i=0x0, eol=<optimized out>) at /var/tmp/portage/kde-base/kmix-4.7.90/work/kmix-4.7.90/kmix/backends/mixer_pulse.cpp:309
#16 0x00007fd819e0a9fc in ?? () from /usr/lib64/libpulse.so.0
#17 0x00007fd81949b423 in ?? () from /usr/lib64/libpulsecommon-1.1.so
#18 0x00007fd81949b793 in pa_pdispatch_run () from /usr/lib64/libpulsecommon-1.1.so
#19 0x00007fd819e01c8d in ?? () from /usr/lib64/libpulse.so.0
#20 0x00007fd81949ffb9 in ?? () from /usr/lib64/libpulsecommon-1.1.so
#21 0x00007fd819becda3 in ?? () from /usr/lib64/libpulse-mainloop-glib.so.0
#22 0x00007fd824449c21 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#23 0x00007fd82444a3d0 in ?? () from /usr/lib64/libglib-2.0.so.0
#24 0x00007fd82444a5d9 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#25 0x00007fd828c49f7f in QEventDispatcherGlib::processEvents (this=0x779aa0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#26 0x00007fd827e9b5be in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#27 0x00007fd828c1e7c2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#28 0x00007fd828c1e9bf in QEventLoop::exec (this=0x7fff4b8cc1f0, flags=...) at kernel/qeventloop.cpp:201
#29 0x00007fd828c22b27 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#30 0x00007fd815116e0a in kdemain (argc=5, argv=0x75e2b0) at /var/tmp/portage/kde-base/kmix-4.7.90/work/kmix-4.7.90/kmix/apps/main.cpp:72
#31 0x0000000000408987 in launch (argc=5, _name=0x720d28 "/usr/bin/kmix", args=<optimized out>, cwd=0x0, envc=<optimized out>, envs=<optimized out>, reset_env=false, tty=0x0, avoid_loops=false, startup_id_str=0x720d6b "bart;1323686211;358392;1411_TIME492540337") at /var/tmp/portage/kde-base/kdelibs-4.7.90/work/kdelibs-4.7.90/kinit/kinit.cpp:734
#32 0x0000000000409a36 in handle_launcher_request (sock=7, who=<optimized out>) at /var/tmp/portage/kde-base/kdelibs-4.7.90/work/kdelibs-4.7.90/kinit/kinit.cpp:1226
#33 0x0000000000409f5f in handle_requests (waitForPid=0) at /var/tmp/portage/kde-base/kdelibs-4.7.90/work/kdelibs-4.7.90/kinit/kinit.cpp:1419
#34 0x0000000000405a2e in main (argc=2, argv=0x7fff4b8cd370, envp=0x7fff4b8cd640) at /var/tmp/portage/kde-base/kdelibs-4.7.90/work/kdelibs-4.7.90/kinit/kinit.cpp:1907

Reported using DrKonqi