Application: dolphin (18.04.0)
 (Compiled from sources)
Qt Version: 5.10.0
Frameworks Version: 5.45.0
Operating System: Linux 4.13.0-38-generic x86_64
Distribution: KDE neon Developer Edition

-- Information about the crash:
i don't know why it crash but it suddently became crash and force close

The crash can be reproduced sometimes.

-- Backtrace:
Application: Dolphin (dolphin), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fbf549c58c0 (LWP 14299))]

Thread 2 (Thread 0x7fbf368c3700 (LWP 14302)):
#0  0x00007fbf47326a94 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fbf472e2381 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbf472e249c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbf4e53f5cb in QEventDispatcherGlib::processEvents (this=0x7fbf300008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007fbf4e4e664a in QEventLoop::exec (this=this@entry=0x7fbf368c2cd0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007fbf4e306554 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:522
#6  0x00007fbf4e9622c5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007fbf4e30b6eb in QThreadPrivate::start (arg=0x7fbf4ebd6d60) at thread/qthread_unix.cpp:376
#8  0x00007fbf496266ba in start_thread (arg=0x7fbf368c3700) at pthread_create.c:333
#9  0x00007fbf5430441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fbf549c58c0 (LWP 14299)):
[KCrash Handler]
#6  0x00007fbf53f2a70b in ?? () from /usr/lib/x86_64-linux-gnu/libdolphinprivate.so.5
#7  0x00007fbf53f66d08 in KStandardItem::setDataValue(QByteArray const&, QVariant const&) () from /usr/lib/x86_64-linux-gnu/libdolphinprivate.so.5
#8  0x00007fbf53f6701a in KStandardItem::setIcon(QString const&) () from /usr/lib/x86_64-linux-gnu/libdolphinprivate.so.5
#9  0x00007fbf546316e6 in ?? () from /usr/lib/x86_64-linux-gnu/libkdeinit5_dolphin.so
#10 0x00007fbf4e5157b6 in QtPrivate::QSlotObjectBase::call (a=0x7ffe7b62f3e0, r=0x7fbf548a05e0, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:378
#11 QMetaObject::activate (sender=0x7fbf548a05e0, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3749
#12 0x00007fbf5465951f in ?? () from /usr/lib/x86_64-linux-gnu/libkdeinit5_dolphin.so
#13 0x00007fbf54626b46 in ?? () from /usr/lib/x86_64-linux-gnu/libkdeinit5_dolphin.so
#14 0x00007fbf4e5157b6 in QtPrivate::QSlotObjectBase::call (a=0x7ffe7b62f510, r=0x7fbf548a05e0, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:378
#15 QMetaObject::activate (sender=sender@entry=0x1989bd0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x0) at kernel/qobject.cpp:3749
#16 0x00007fbf4e515d97 in QMetaObject::activate (sender=sender@entry=0x1989bd0, m=m@entry=0x7fbf52b24760 <KCoreDirLister::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x0) at kernel/qobject.cpp:3628
#17 0x00007fbf528ac473 in KCoreDirLister::completed (this=this@entry=0x1989bd0) at /workspace/build/obj-x86_64-linux-gnu/src/core/moc_kcoredirlister.cpp:481
#18 0x00007fbf528c027c in KCoreDirListerCache::slotUpdateResult (this=0x7fbf52b281e0 <(anonymous namespace)::Q_QGS_kDirListerCache::innerFunction()::holder>, j=<optimized out>) at /workspace/build/src/core/kcoredirlister.cpp:1885
#19 0x00007fbf528c058c in KCoreDirListerCache::qt_static_metacall (_o=0x7fbf52b281e0 <(anonymous namespace)::Q_QGS_kDirListerCache::innerFunction()::holder>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /workspace/build/obj-x86_64-linux-gnu/src/core/moc_kcoredirlister_p.cpp:139
#20 0x00007fbf4e515489 in QMetaObject::activate (sender=0x1d54d70, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3766
#21 0x00007fbf4fe6fc6c in KJob::result(KJob*, KJob::QPrivateSignal) () from /usr/lib/x86_64-linux-gnu/libKF5CoreAddons.so.5
#22 0x00007fbf4fe70781 in KJob::finishJob(bool) () from /usr/lib/x86_64-linux-gnu/libKF5CoreAddons.so.5
#23 0x00007fbf52871015 in KIO::SimpleJob::slotFinished (this=this@entry=0x1d54d70) at /workspace/build/src/core/simplejob.cpp:232
#24 0x00007fbf52868f9e in KIO::ListJob::slotFinished (this=0x1d54d70) at /workspace/build/src/core/listjob.cpp:247
#25 0x00007fbf4e5157b6 in QtPrivate::QSlotObjectBase::call (a=0x7ffe7b62fb00, r=0x1d54d70, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:378
#26 QMetaObject::activate (sender=sender@entry=0x1b1bab0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=4, argv=argv@entry=0x0) at kernel/qobject.cpp:3749
#27 0x00007fbf4e515d97 in QMetaObject::activate (sender=sender@entry=0x1b1bab0, m=m@entry=0x7fbf52b22760 <KIO::SlaveInterface::staticMetaObject>, local_signal_index=local_signal_index@entry=4, argv=argv@entry=0x0) at kernel/qobject.cpp:3628
#28 0x00007fbf52847763 in KIO::SlaveInterface::finished (this=this@entry=0x1b1bab0) at /workspace/build/obj-x86_64-linux-gnu/src/core/moc_slaveinterface.cpp:437
#29 0x00007fbf52849771 in KIO::SlaveInterface::dispatch (this=0x1b1bab0, _cmd=<optimized out>, rawdata=...) at /workspace/build/src/core/slaveinterface.cpp:160
#30 0x00007fbf52847d77 in KIO::SlaveInterface::dispatch (this=0x1b1bab0) at /workspace/build/src/core/slaveinterface.cpp:89
#31 0x00007fbf5284ce31 in KIO::Slave::gotInput (this=0x1b1bab0) at /workspace/build/src/core/slave.cpp:406
#32 0x00007fbf528dd015 in KIO::Slave::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /workspace/build/obj-x86_64-linux-gnu/src/core/moc_slave.cpp:89
#33 0x00007fbf4e515489 in QMetaObject::activate (sender=0x1afdc20, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3766
#34 0x00007fbf4e5164c9 in QObject::event (this=0x1afdc20, e=<optimized out>) at kernel/qobject.cpp:1246
#35 0x00007fbf4f4b4acc in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x1afdc20, e=0x191e470) at kernel/qapplication.cpp:3732
#36 0x00007fbf4f4bc417 in QApplication::notify (this=0x7ffe7b6304f0, receiver=0x1afdc20, e=0x191e470) at kernel/qapplication.cpp:3491
#37 0x00007fbf4e4e83c8 in QCoreApplication::notifyInternal2 (receiver=0x1afdc20, event=event@entry=0x191e470) at kernel/qcoreapplication.cpp:1044
#38 0x00007fbf4e4eafcb in QCoreApplication::sendEvent (event=0x191e470, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#39 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x13180c0) at kernel/qcoreapplication.cpp:1719
#40 0x00007fbf4e4eb438 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1573
#41 0x00007fbf4e53ffa3 in postEventSourceDispatch (s=0x136be40) at kernel/qeventdispatcher_glib.cpp:276
#42 0x00007fbf472e2197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#43 0x00007fbf472e23f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#44 0x00007fbf472e249c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#45 0x00007fbf4e53f5af in QEventDispatcherGlib::processEvents (this=this@entry=0x1358cb0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#46 0x00007fbf3f3c41a1 in QPAEventDispatcherGlib::processEvents (this=0x1358cb0, flags=...) at qeventdispatcher_glib.cpp:69
#47 0x00007fbf4e4e664a in QEventLoop::exec (this=this@entry=0x7ffe7b6303b0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#48 0x00007fbf4e4ef854 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1332
#49 0x00007fbf5460b15a in kdemain () from /usr/lib/x86_64-linux-gnu/libkdeinit5_dolphin.so
#50 0x00007fbf5421d830 in __libc_start_main (main=0x4006b0, argc=2, argv=0x7ffe7b630678, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe7b630668) at ../csu/libc-start.c:291
#51 0x00000000004006e9 in _start ()

Reported using DrKonqi