Application: dragon (17.04.3)

Qt Version: 5.9.1
Frameworks Version: 5.36.0
Operating System: Linux 4.8.0-58-generic x86_64
Distribution: KDE neon User Edition 5.10

-- Information about the crash:
The first video I click on in dolphin usually opens in DragonPlayer just fine. However, it often happens that the next video crashes Dragon Player (without even showing its interface).

The crash can be reproduced sometimes.

-- 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 0x7f4b104508c0 (LWP 9499))]

Thread 3 (Thread 0x7f4af6d00700 (LWP 9501)):
#0  0x00007f4b0c13224d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4b07c696f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4b07c25e74 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4b07c26330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4b07c2649c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f4b0cd6794b in QEventDispatcherGlib::processEvents (this=0x7f4af00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f4b0cd107ca in QEventLoop::exec (this=this@entry=0x7f4af6cffcd0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#7  0x00007f4b0cb39cd4 in QThread::exec (this=this@entry=0x7f4b105d7da0 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:515
#8  0x00007f4b10561b75 in QDBusConnectionManager::run (this=0x7f4b105d7da0 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:178
#9  0x00007f4b0cb3e989 in QThreadPrivate::start (arg=0x7f4b105d7da0 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:368
#10 0x00007f4b0a1216ba in start_thread (arg=0x7f4af6d00700) at pthread_create.c:333
#11 0x00007f4b0c1423dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f4afde91700 (LWP 9500)):
#0  0x00007f4b0c13670d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4b09cebc62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f4b09ced8d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f4b003e9329 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f4b0cb3e989 in QThreadPrivate::start (arg=0x921de0) at thread/qthread_unix.cpp:368
#5  0x00007f4b0a1216ba in start_thread (arg=0x7f4afde91700) at pthread_create.c:333
#6  0x00007f4b0c1423dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f4b104508c0 (LWP 9499)):
[KCrash Handler]
#6  Phonon::MediaObject::currentSource (this=0x63006e00450065) at /workspace/build/phonon/mediaobject.cpp:253
#7  0x00000000004212d1 in Dragon::VideoWindow::eject (this=0xb83380) at /workspace/build/src/app/videoWindow.cpp:804
#8  0x00000000004219a8 in Dragon::VideoWindow::load (this=0xb83380, url=...) at /workspace/build/src/app/videoWindow.cpp:180
#9  0x0000000000430295 in Dragon::MainWindow::load (this=0x9798a0, url=...) at /workspace/build/src/app/mainWindow.cpp:578
#10 0x0000000000435de4 in Dragon::MainWindow::open (this=0x9798a0, url=...) at /workspace/build/src/app/mainWindow.cpp:521
#11 0x000000000042d4a5 in Dragon::PlayerApplication::newInstance (this=0x7ffc73c161c0, playDisc=<optimized out>, uris=...) at /workspace/build/src/app/playerApplication.cpp:81
#12 0x000000000042dd3b in Dragon::PlayerApplication::slotActivateRequested (this=0x7ffc73c161c0, arguments=..., workingDirectory=...) at /workspace/build/src/app/playerApplication.cpp:54
#13 0x00007f4b0cd3ef46 in QtPrivate::QSlotObjectBase::call (a=0x7ffc73c13db0, r=0x7ffc73c161c0, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:101
#14 QMetaObject::activate (sender=sender@entry=0x7ffc73c161e0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffc73c13db0) at kernel/qobject.cpp:3749
#15 0x00007f4b0cd3f527 in QMetaObject::activate (sender=sender@entry=0x7ffc73c161e0, m=m@entry=0x7f4b0f157d00 <KDBusService::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffc73c13db0) at kernel/qobject.cpp:3628
#16 0x00007f4b0ef52cc7 in KDBusService::activateRequested (this=this@entry=0x7ffc73c161e0, _t1=..., _t2=...) at /workspace/build/obj-x86_64-linux-gnu/src/moc_kdbusservice.cpp:197
#17 0x00007f4b0ef4d204 in KDBusService::CommandLine (this=0x7ffc73c161e0, arguments=..., workingDirectory=..., platform_data=...) at /workspace/build/src/kdbusservice.cpp:241
#18 0x00007f4b0ef52b2d in KDBusServiceExtensionsAdaptor::CommandLine (platform_data=..., working_dir=..., arguments=..., this=this@entry=0x9693c0) at /workspace/build/obj-x86_64-linux-gnu/src/kdbusserviceextensions_adaptor.cpp:39
#19 KDBusServiceExtensionsAdaptor::qt_static_metacall (_o=_o@entry=0x9693c0, _a=_a@entry=0x7ffc73c13f20, _id=0, _c=QMetaObject::InvokeMetaMethod) at /workspace/build/obj-x86_64-linux-gnu/src/kdbusserviceextensions_adaptor.moc:93
#20 0x00007f4b0ef52c47 in KDBusServiceExtensionsAdaptor::qt_static_metacall (_a=0x7ffc73c13f20, _id=0, _c=QMetaObject::InvokeMetaMethod, _o=0x9693c0) at /workspace/build/obj-x86_64-linux-gnu/src/kdbusserviceextensions_adaptor.moc:130
#21 KDBusServiceExtensionsAdaptor::qt_metacall (this=0x9693c0, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0x7ffc73c13f20) at /workspace/build/obj-x86_64-linux-gnu/src/kdbusserviceextensions_adaptor.moc:126
#22 0x00007f4b1056dee3 in QDBusConnectionPrivate::deliverCall (this=this@entry=0x7f4af00030f0, object=object@entry=0x9693c0, msg=..., metaTypes=..., slotIdx=<optimized out>) at qdbusintegrator.cpp:998
#23 0x00007f4b10572958 in QDBusConnectionPrivate::activateCall (this=this@entry=0x7f4af00030f0, object=0x9693c0, flags=flags@entry=273, msg=...) at qdbusintegrator.cpp:908
#24 0x00007f4b105730ab in QDBusConnectionPrivate::activateObject (this=0x7f4af00030f0, node=..., msg=..., pathStartPos=<optimized out>) at qdbusintegrator.cpp:1491
#25 0x00007f4b1057596e in QDBusActivateObjectEvent::placeMetaCall (this=0x7f4af00194a0) at qdbusintegrator.cpp:1611
#26 0x00007f4b0cd3fc59 in QObject::event (this=0x7ffc73c161e0, e=<optimized out>) at kernel/qobject.cpp:1246
#27 0x00007f4b0d67a3fc in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x7ffc73c161e0, e=0x7f4af00194a0) at kernel/qapplication.cpp:3717
#28 0x00007f4b0d681e07 in QApplication::notify (this=0x7ffc73c161c0, receiver=0x7ffc73c161e0, e=0x7f4af00194a0) at kernel/qapplication.cpp:3476
#29 0x00007f4b0cd12798 in QCoreApplication::notifyInternal2 (receiver=0x7ffc73c161e0, event=event@entry=0x7f4af00194a0) at kernel/qcoreapplication.cpp:1018
#30 0x00007f4b0cd14f7b in QCoreApplication::sendEvent (event=0x7f4af00194a0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:233
#31 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x907e10) at kernel/qcoreapplication.cpp:1678
#32 0x00007f4b0cd153e8 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1532
#33 0x00007f4b0cd68323 in postEventSourceDispatch (s=0x944d90) at kernel/qeventdispatcher_glib.cpp:276
#34 0x00007f4b07c26197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007f4b07c263f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#36 0x00007f4b07c2649c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#37 0x00007f4b0cd6792f in QEventDispatcherGlib::processEvents (this=0x950570, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#38 0x00007f4b0cd107ca in QEventLoop::exec (this=0x7ffc73c146b0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#39 0x00007f4b0e2df6be in KJob::exec (this=this@entry=0xb6a400) at /workspace/build/src/lib/jobs/kjob.cpp:198
#40 0x0000000000430263 in Dragon::MainWindow::load (this=0x9798a0, url=...) at /workspace/build/src/app/mainWindow.cpp:566
#41 0x0000000000435de4 in Dragon::MainWindow::open (this=0x9798a0, url=...) at /workspace/build/src/app/mainWindow.cpp:521
#42 0x000000000042d4a5 in Dragon::PlayerApplication::newInstance (this=0x7ffc73c161c0, playDisc=<optimized out>, uris=...) at /workspace/build/src/app/playerApplication.cpp:81
#43 0x000000000042dd3b in Dragon::PlayerApplication::slotActivateRequested (this=0x7ffc73c161c0, arguments=..., workingDirectory=...) at /workspace/build/src/app/playerApplication.cpp:54
#44 0x00007f4b0cd3ef46 in QtPrivate::QSlotObjectBase::call (a=0x7ffc73c14a90, r=0x7ffc73c161c0, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:101
#45 QMetaObject::activate (sender=sender@entry=0x7ffc73c161e0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffc73c14a90) at kernel/qobject.cpp:3749
#46 0x00007f4b0cd3f527 in QMetaObject::activate (sender=sender@entry=0x7ffc73c161e0, m=m@entry=0x7f4b0f157d00 <KDBusService::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffc73c14a90) at kernel/qobject.cpp:3628
#47 0x00007f4b0ef52cc7 in KDBusService::activateRequested (this=this@entry=0x7ffc73c161e0, _t1=..., _t2=...) at /workspace/build/obj-x86_64-linux-gnu/src/moc_kdbusservice.cpp:197
#48 0x00007f4b0ef4d204 in KDBusService::CommandLine (this=0x7ffc73c161e0, arguments=..., workingDirectory=..., platform_data=...) at /workspace/build/src/kdbusservice.cpp:241
#49 0x00007f4b0ef52b2d in KDBusServiceExtensionsAdaptor::CommandLine (platform_data=..., working_dir=..., arguments=..., this=this@entry=0x9693c0) at /workspace/build/obj-x86_64-linux-gnu/src/kdbusserviceextensions_adaptor.cpp:39
#50 KDBusServiceExtensionsAdaptor::qt_static_metacall (_o=_o@entry=0x9693c0, _a=_a@entry=0x7ffc73c14c00, _id=0, _c=QMetaObject::InvokeMetaMethod) at /workspace/build/obj-x86_64-linux-gnu/src/kdbusserviceextensions_adaptor.moc:93
#51 0x00007f4b0ef52c47 in KDBusServiceExtensionsAdaptor::qt_static_metacall (_a=0x7ffc73c14c00, _id=0, _c=QMetaObject::InvokeMetaMethod, _o=0x9693c0) at /workspace/build/obj-x86_64-linux-gnu/src/kdbusserviceextensions_adaptor.moc:130
#52 KDBusServiceExtensionsAdaptor::qt_metacall (this=0x9693c0, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0x7ffc73c14c00) at /workspace/build/obj-x86_64-linux-gnu/src/kdbusserviceextensions_adaptor.moc:126
#53 0x00007f4b1056dee3 in QDBusConnectionPrivate::deliverCall (this=this@entry=0x7f4af00030f0, object=object@entry=0x9693c0, msg=..., metaTypes=..., slotIdx=<optimized out>) at qdbusintegrator.cpp:998
#54 0x00007f4b10572958 in QDBusConnectionPrivate::activateCall (this=this@entry=0x7f4af00030f0, object=0x9693c0, flags=flags@entry=273, msg=...) at qdbusintegrator.cpp:908
#55 0x00007f4b105730ab in QDBusConnectionPrivate::activateObject (this=0x7f4af00030f0, node=..., msg=..., pathStartPos=<optimized out>) at qdbusintegrator.cpp:1491
#56 0x00007f4b1057596e in QDBusActivateObjectEvent::placeMetaCall (this=0x7f4af001a400) at qdbusintegrator.cpp:1611
#57 0x00007f4b0cd3fc59 in QObject::event (this=0x7ffc73c161e0, e=<optimized out>) at kernel/qobject.cpp:1246
#58 0x00007f4b0d67a3fc in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x7ffc73c161e0, e=0x7f4af001a400) at kernel/qapplication.cpp:3717
#59 0x00007f4b0d681e07 in QApplication::notify (this=0x7ffc73c161c0, receiver=0x7ffc73c161e0, e=0x7f4af001a400) at kernel/qapplication.cpp:3476
#60 0x00007f4b0cd12798 in QCoreApplication::notifyInternal2 (receiver=0x7ffc73c161e0, event=event@entry=0x7f4af001a400) at kernel/qcoreapplication.cpp:1018
#61 0x00007f4b0cd14f7b in QCoreApplication::sendEvent (event=0x7f4af001a400, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:233
#62 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x907e10) at kernel/qcoreapplication.cpp:1678
#63 0x00007f4b0cd153e8 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1532
#64 0x00007f4b0cd68323 in postEventSourceDispatch (s=0x944d90) at kernel/qeventdispatcher_glib.cpp:276
#65 0x00007f4b07c26197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#66 0x00007f4b07c263f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#67 0x00007f4b07c2649c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#68 0x00007f4b0cd6792f in QEventDispatcherGlib::processEvents (this=0x950570, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#69 0x00007f4b0cd107ca in QEventLoop::exec (this=0x7ffc73c15390, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#70 0x00007f4b0e2df6be in KJob::exec (this=this@entry=0xb39770) at /workspace/build/src/lib/jobs/kjob.cpp:198
#71 0x0000000000430263 in Dragon::MainWindow::load (this=0x9798a0, url=...) at /workspace/build/src/app/mainWindow.cpp:566
#72 0x0000000000435de4 in Dragon::MainWindow::open (this=0x9798a0, url=...) at /workspace/build/src/app/mainWindow.cpp:521
#73 0x000000000042d4a5 in Dragon::PlayerApplication::newInstance (this=0x7ffc73c161c0, playDisc=<optimized out>, uris=...) at /workspace/build/src/app/playerApplication.cpp:81
#74 0x000000000042dd3b in Dragon::PlayerApplication::slotActivateRequested (this=0x7ffc73c161c0, arguments=..., workingDirectory=...) at /workspace/build/src/app/playerApplication.cpp:54
#75 0x00007f4b0cd3ef46 in QtPrivate::QSlotObjectBase::call (a=0x7ffc73c15770, r=0x7ffc73c161c0, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:101
#76 QMetaObject::activate (sender=sender@entry=0x7ffc73c161e0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffc73c15770) at kernel/qobject.cpp:3749
#77 0x00007f4b0cd3f527 in QMetaObject::activate (sender=sender@entry=0x7ffc73c161e0, m=m@entry=0x7f4b0f157d00 <KDBusService::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffc73c15770) at kernel/qobject.cpp:3628
#78 0x00007f4b0ef52cc7 in KDBusService::activateRequested (this=this@entry=0x7ffc73c161e0, _t1=..., _t2=...) at /workspace/build/obj-x86_64-linux-gnu/src/moc_kdbusservice.cpp:197
#79 0x00007f4b0ef4d204 in KDBusService::CommandLine (this=0x7ffc73c161e0, arguments=..., workingDirectory=..., platform_data=...) at /workspace/build/src/kdbusservice.cpp:241
#80 0x00007f4b0ef52b2d in KDBusServiceExtensionsAdaptor::CommandLine (platform_data=..., working_dir=..., arguments=..., this=this@entry=0x9693c0) at /workspace/build/obj-x86_64-linux-gnu/src/kdbusserviceextensions_adaptor.cpp:39
#81 KDBusServiceExtensionsAdaptor::qt_static_metacall (_o=_o@entry=0x9693c0, _a=_a@entry=0x7ffc73c158e0, _id=0, _c=QMetaObject::InvokeMetaMethod) at /workspace/build/obj-x86_64-linux-gnu/src/kdbusserviceextensions_adaptor.moc:93
#82 0x00007f4b0ef52c47 in KDBusServiceExtensionsAdaptor::qt_static_metacall (_a=0x7ffc73c158e0, _id=0, _c=QMetaObject::InvokeMetaMethod, _o=0x9693c0) at /workspace/build/obj-x86_64-linux-gnu/src/kdbusserviceextensions_adaptor.moc:130
#83 KDBusServiceExtensionsAdaptor::qt_metacall (this=0x9693c0, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0x7ffc73c158e0) at /workspace/build/obj-x86_64-linux-gnu/src/kdbusserviceextensions_adaptor.moc:126
#84 0x00007f4b1056dee3 in QDBusConnectionPrivate::deliverCall (this=this@entry=0x7f4af00030f0, object=object@entry=0x9693c0, msg=..., metaTypes=..., slotIdx=<optimized out>) at qdbusintegrator.cpp:998
#85 0x00007f4b1057279a in QDBusConnectionPrivate::activateCall (this=this@entry=0x7f4af00030f0, object=0x9693c0, flags=flags@entry=273, msg=...) at qdbusintegrator.cpp:901
#86 0x00007f4b105730ab in QDBusConnectionPrivate::activateObject (this=0x7f4af00030f0, node=..., msg=..., pathStartPos=<optimized out>) at qdbusintegrator.cpp:1491
#87 0x00007f4b1057596e in QDBusActivateObjectEvent::placeMetaCall (this=0x7f4af0017790) at qdbusintegrator.cpp:1611
#88 0x00007f4b0cd3fc59 in QObject::event (this=0x7ffc73c161e0, e=<optimized out>) at kernel/qobject.cpp:1246
#89 0x00007f4b0d67a3fc in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x7ffc73c161e0, e=0x7f4af0017790) at kernel/qapplication.cpp:3717
#90 0x00007f4b0d681e07 in QApplication::notify (this=0x7ffc73c161c0, receiver=0x7ffc73c161e0, e=0x7f4af0017790) at kernel/qapplication.cpp:3476
#91 0x00007f4b0cd12798 in QCoreApplication::notifyInternal2 (receiver=0x7ffc73c161e0, event=event@entry=0x7f4af0017790) at kernel/qcoreapplication.cpp:1018
#92 0x00007f4b0cd14f7b in QCoreApplication::sendEvent (event=0x7f4af0017790, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:233
#93 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x907e10) at kernel/qcoreapplication.cpp:1678
#94 0x00007f4b0cd153e8 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1532
#95 0x00007f4b0cd68323 in postEventSourceDispatch (s=0x944d90) at kernel/qeventdispatcher_glib.cpp:276
#96 0x00007f4b07c26197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#97 0x00007f4b07c263f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#98 0x00007f4b07c2649c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#99 0x00007f4b0cd6792f in QEventDispatcherGlib::processEvents (this=0x950570, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#100 0x00007f4b0cd107ca in QEventLoop::exec (this=this@entry=0x7ffc73c16070, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#101 0x00007f4b0cd19704 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1291
#102 0x000000000041a9a1 in main (argc=2, argv=<optimized out>) at /workspace/build/src/app/main.cpp:91

Reported using DrKonqi