Application: kmix (4.5)
KDE Platform Version: 4.14.9
Qt Version: 4.8.6
Operating System: Linux 4.0.4-202.fc21.x86_64 x86_64
Distribution: "Fedora release 21 (Twenty One)"

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

I was streaming a Flash video in a Windows 10 VirtualBox VM.

- Unusual behaviour I noticed:

On clicking the sound icon on the taskbar to bring up the Kmix box with the level adjusters it will continually flicker and eventually crash.

However if you stop the flash video then the flicker in stops and if you start it again it restarts etc. etc.

-- Backtrace:
Application: KMix (kmix), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
81	T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
[Current thread is 1 (Thread 0x7f6005a09900 (LWP 1878))]

Thread 2 (Thread 0x7f5fec97f700 (LWP 1936)):
#0  0x0000003959af4c8d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x000000395c249b34 in g_main_context_poll (priority=2147483647, n_fds=1, fds=0x7f5fe8003430, timeout=-1, context=0x7f5fe80009c0) at gmain.c:4076
#2  g_main_context_iterate (context=context@entry=0x7f5fe80009c0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3776
#3  0x000000395c249c4c in g_main_context_iteration (context=0x7f5fe80009c0, may_block=1) at gmain.c:3842
#4  0x0000003e29db557e in QEventDispatcherGlib::processEvents (this=0x7f5fe80008e0, flags=...) at kernel/qeventdispatcher_glib.cpp:452
#5  0x0000003e29d84d81 in QEventLoop::processEvents (this=this@entry=0x7f5fec97ec80, flags=...) at kernel/qeventloop.cpp:149
#6  0x0000003e29d850e5 in QEventLoop::exec (this=this@entry=0x7f5fec97ec80, flags=...) at kernel/qeventloop.cpp:204
#7  0x0000003e29c79bb9 in QThread::exec (this=this@entry=0x11924b0) at thread/qthread.cpp:538
#8  0x0000003e29d656e3 in QInotifyFileSystemWatcherEngine::run (this=0x11924b0) at io/qfilesystemwatcher_inotify.cpp:265
#9  0x0000003e29c7c41f in QThreadPrivate::start (arg=0x11924b0) at thread/qthread_unix.cpp:349
#10 0x0000003959e0752a in start_thread (arg=0x7f5fec97f700) at pthread_create.c:310
#11 0x0000003959b0022d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f6005a09900 (LWP 1878)):
[KCrash Handler]
#6  parent (this=0xe43ae0) at ../../src/corelib/kernel/qobject.h:273
#7  parentWidget (this=0xe43ae0) at ../../src/gui/kernel/qwidget.h:1036
#8  QWidget::window (this=this@entry=0xe43af0) at kernel/qwidget.cpp:4348
#9  0x0000003acf3cdc17 in QApplicationPrivate::dispatchEnterLeave (enter=enter@entry=0xedd670, leave=0xe43af0) at kernel/qapplication.cpp:2756
#10 0x0000003acf3ce20b in QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0xedd670, event=event@entry=0x7fffa166ec20, alienWidget=<optimized out>, alienWidget@entry=0xedd670, nativeWidget=nativeWidget@entry=0x116c680, buttonDown=buttonDown@entry=0x3acfeea478 <qt_button_down>, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:3185
#11 0x0000003acf4448fa in QETWidget::translateMouseEvent (this=this@entry=0x116c680, event=event@entry=0x7fffa166ef50) at kernel/qapplication_x11.cpp:4474
#12 0x0000003acf442f5c in QApplication::x11ProcessEvent (this=0xb93220, event=event@entry=0x7fffa166ef50) at kernel/qapplication_x11.cpp:3663
#13 0x0000003acf46aff4 in x11EventSourceDispatch (s=0xb9c880, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:148
#14 0x000000395c2497fb in g_main_dispatch (context=0xbb1ca0) at gmain.c:3111
#15 g_main_context_dispatch (context=context@entry=0xbb1ca0) at gmain.c:3710
#16 0x000000395c249b98 in g_main_context_iterate (context=context@entry=0xbb1ca0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3781
#17 0x000000395c249c4c in g_main_context_iteration (context=0xbb1ca0, may_block=1) at gmain.c:3842
#18 0x0000003e29db555e in QEventDispatcherGlib::processEvents (this=0xaef7e0, flags=...) at kernel/qeventdispatcher_glib.cpp:450
#19 0x0000003acf46b176 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:207
#20 0x0000003e29d84d81 in QEventLoop::processEvents (this=this@entry=0x7fffa166f330, flags=...) at kernel/qeventloop.cpp:149
#21 0x0000003e29d850e5 in QEventLoop::exec (this=this@entry=0x7fffa166f330, flags=...) at kernel/qeventloop.cpp:204
#22 0x0000003e29d8a7c9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#23 0x00007f600bb8c49c in kdemain () from /lib64/libkdeinit4_kmix.so
#24 0x0000003959a1ffe0 in __libc_start_main (main=0x400810 <main>, argc=3, argv=0x7fffa166f578, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffa166f568) at libc-start.c:289
#25 0x000000000040083e in _start ()

Reported using DrKonqi