Application: dragon (16.12.3)

Qt Version: 5.7.1
Frameworks Version: 5.31.0
Operating System: Linux 4.10.0-20-generic x86_64
Distribution: Ubuntu 17.04

-- Information about the crash:
- What I was doing when the application crashed:Restoring Dota 2 in the steam client.

- Unusual behavior I noticed: Dolphin became sluggish and stopped responding. Kde desktop panel became unresponsive

-- Backtrace:
Application: Dragon Player (dragon), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fd74c6d08c0 (LWP 21441))]

Thread 3 (Thread 0x7fd732074700 (LWP 21449)):
#0  0x00007fd747b0b18d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fd742cb4576 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd742cb468c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd748737f2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fd7486e188a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fd74850efe3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fd748b4a5c5 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007fd748513c98 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fd7454746da in start_thread (arg=0x7fd732074700) at pthread_create.c:456
#9  0x00007fd747b1717f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 2 (Thread 0x7fd7396d3700 (LWP 21446)):
#0  0x00007fd747b0b18d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fd74503dc62 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fd74503f8d7 in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fd73c25ded9 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007fd748513c98 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fd7454746da in start_thread (arg=0x7fd7396d3700) at pthread_create.c:456
#6  0x00007fd747b1717f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 1 (Thread 0x7fd74c6d08c0 (LWP 21441)):
[KCrash Handler]
#6  0x00007fd749d8d4a0 in Phonon::MediaSource::MediaSource(Phonon::MediaSource const&) () at /usr/lib/x86_64-linux-gnu/libphonon4qt5.so.4
#7  0x00007fd749d89cf1 in Phonon::MediaObject::currentSource() const () at /usr/lib/x86_64-linux-gnu/libphonon4qt5.so.4
#8  0x000055746dcf0fe0 in  ()
#9  0x000055746dcf16b8 in  ()
#10 0x000055746dcfffcc in  ()
#11 0x000055746dd05b6b in  ()
#12 0x000055746dcfd1b5 in  ()
#13 0x000055746dcfda57 in  ()
#14 0x00007fd74870f81e in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00007fd74b121717 in KDBusService::activateRequested(QStringList const&, QString const&) () at /usr/lib/x86_64-linux-gnu/libKF5DBusAddons.so.5
#16 0x00007fd74b11be94 in KDBusService::CommandLine(QStringList const&, QString const&, QMap<QString, QVariant> const&) () at /usr/lib/x86_64-linux-gnu/libKF5DBusAddons.so.5
#17 0x00007fd74b12157d in  () at /usr/lib/x86_64-linux-gnu/libKF5DBusAddons.so.5
#18 0x00007fd74b121697 in  () at /usr/lib/x86_64-linux-gnu/libKF5DBusAddons.so.5
#19 0x00007fd748b54650 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#20 0x00007fd748b584fd in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#21 0x00007fd748b58da4 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#22 0x00007fd748b5b5ae in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#23 0x00007fd748710359 in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007fd74964635c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#25 0x00007fd74964db11 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#26 0x00007fd7486e38a0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007fd7486e602d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00007fd748737b03 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007fd742cb4377 in g_main_context_dispatch () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x00007fd742cb45e0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#31 0x00007fd742cb468c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#32 0x00007fd748737f0f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#33 0x00007fd7486e188a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#34 0x00007fd7486e9ffc in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#35 0x000055746dcea454 in  ()
#36 0x00007fd747a2f3f1 in __libc_start_main (main=0x55746dce9a60, argc=2, argv=0x7ffc934c22c8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc934c22b8) at ../csu/libc-start.c:291
#37 0x000055746dcea5ba in _start ()

Reported using DrKonqi