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 dont know why this is always crash

The crash can be reproduced every time.

-- 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 0x7fe30fc118c0 (LWP 3604))]

Thread 2 (Thread 0x7fe2f5cde700 (LWP 3606)):
#0  0x00007fe30f54474d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fe30252e38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe30252e49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe30978b5cb in QEventDispatcherGlib::processEvents (this=0x7fe2e80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007fe30973264a in QEventLoop::exec (this=this@entry=0x7fe2f5cddcd0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007fe309552554 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:522
#6  0x00007fe309bae2c5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007fe3095576eb in QThreadPrivate::start (arg=0x7fe309e22d60) at thread/qthread_unix.cpp:376
#8  0x00007fe3048726ba in start_thread (arg=0x7fe2f5cde700) at pthread_create.c:333
#9  0x00007fe30f55041d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fe30fc118c0 (LWP 3604)):
[KCrash Handler]
#6  0x00007fe30f17670b in ?? () from /usr/lib/x86_64-linux-gnu/libdolphinprivate.so.5
#7  0x00007fe30f1b2d08 in KStandardItem::setDataValue(QByteArray const&, QVariant const&) () from /usr/lib/x86_64-linux-gnu/libdolphinprivate.so.5
#8  0x00007fe30f1b301a in KStandardItem::setIcon(QString const&) () from /usr/lib/x86_64-linux-gnu/libdolphinprivate.so.5
#9  0x00007fe30f87d6e6 in ?? () from /usr/lib/x86_64-linux-gnu/libkdeinit5_dolphin.so
#10 0x00007fe3097617b6 in QtPrivate::QSlotObjectBase::call (a=0x7ffd44a94e00, r=0x7fe30faec5e0, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:378
#11 QMetaObject::activate (sender=0x7fe30faec5e0, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3749
#12 0x00007fe30f8a551f in ?? () from /usr/lib/x86_64-linux-gnu/libkdeinit5_dolphin.so
#13 0x00007fe30f872b46 in ?? () from /usr/lib/x86_64-linux-gnu/libkdeinit5_dolphin.so
#14 0x00007fe3097617b6 in QtPrivate::QSlotObjectBase::call (a=0x7ffd44a94f30, r=0x7fe30faec5e0, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:378
#15 QMetaObject::activate (sender=sender@entry=0x1eea650, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x0) at kernel/qobject.cpp:3749
#16 0x00007fe309761d97 in QMetaObject::activate (sender=sender@entry=0x1eea650, m=m@entry=0x7fe30dd70760 <KCoreDirLister::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x0) at kernel/qobject.cpp:3628
#17 0x00007fe30daf8473 in KCoreDirLister::completed (this=this@entry=0x1eea650) at /workspace/build/obj-x86_64-linux-gnu/src/core/moc_kcoredirlister.cpp:481
#18 0x00007fe30db0c27c in KCoreDirListerCache::slotUpdateResult (this=0x7fe30dd741e0 <(anonymous namespace)::Q_QGS_kDirListerCache::innerFunction()::holder>, j=<optimized out>) at /workspace/build/src/core/kcoredirlister.cpp:1885
#19 0x00007fe30db0c58c in KCoreDirListerCache::qt_static_metacall (_o=0x7fe30dd741e0 <(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 0x00007fe309761489 in QMetaObject::activate (sender=0x203a690, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3766
#21 0x00007fe30b0bbc6c in KJob::result(KJob*, KJob::QPrivateSignal) () from /usr/lib/x86_64-linux-gnu/libKF5CoreAddons.so.5
#22 0x00007fe30b0bc781 in KJob::finishJob(bool) () from /usr/lib/x86_64-linux-gnu/libKF5CoreAddons.so.5
#23 0x00007fe30dabd015 in KIO::SimpleJob::slotFinished (this=this@entry=0x203a690) at /workspace/build/src/core/simplejob.cpp:232
#24 0x00007fe30dab4f9e in KIO::ListJob::slotFinished (this=0x203a690) at /workspace/build/src/core/listjob.cpp:247
#25 0x00007fe3097617b6 in QtPrivate::QSlotObjectBase::call (a=0x7ffd44a95520, r=0x203a690, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:378
#26 QMetaObject::activate (sender=sender@entry=0x207e4e0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=4, argv=argv@entry=0x0) at kernel/qobject.cpp:3749
#27 0x00007fe309761d97 in QMetaObject::activate (sender=sender@entry=0x207e4e0, m=m@entry=0x7fe30dd6e760 <KIO::SlaveInterface::staticMetaObject>, local_signal_index=local_signal_index@entry=4, argv=argv@entry=0x0) at kernel/qobject.cpp:3628
#28 0x00007fe30da93763 in KIO::SlaveInterface::finished (this=this@entry=0x207e4e0) at /workspace/build/obj-x86_64-linux-gnu/src/core/moc_slaveinterface.cpp:437
#29 0x00007fe30da95771 in KIO::SlaveInterface::dispatch (this=0x207e4e0, _cmd=<optimized out>, rawdata=...) at /workspace/build/src/core/slaveinterface.cpp:160
#30 0x00007fe30da93d77 in KIO::SlaveInterface::dispatch (this=0x207e4e0) at /workspace/build/src/core/slaveinterface.cpp:89
#31 0x00007fe30da98e31 in KIO::Slave::gotInput (this=0x207e4e0) at /workspace/build/src/core/slave.cpp:406
#32 0x00007fe30db29015 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 0x00007fe309761489 in QMetaObject::activate (sender=0x207f7a0, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3766
#34 0x00007fe3097624c9 in QObject::event (this=0x207f7a0, e=<optimized out>) at kernel/qobject.cpp:1246
#35 0x00007fe30a700acc in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x207f7a0, e=0x1970030) at kernel/qapplication.cpp:3732
#36 0x00007fe30a708417 in QApplication::notify (this=0x7ffd44a95f10, receiver=0x207f7a0, e=0x1970030) at kernel/qapplication.cpp:3491
#37 0x00007fe3097343c8 in QCoreApplication::notifyInternal2 (receiver=0x207f7a0, event=event@entry=0x1970030) at kernel/qcoreapplication.cpp:1044
#38 0x00007fe309736fcb in QCoreApplication::sendEvent (event=0x1970030, 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=0x18790c0) at kernel/qcoreapplication.cpp:1719
#40 0x00007fe309737438 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1573
#41 0x00007fe30978bfa3 in postEventSourceDispatch (s=0x18cd070) at kernel/qeventdispatcher_glib.cpp:276
#42 0x00007fe30252e197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#43 0x00007fe30252e3f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#44 0x00007fe30252e49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#45 0x00007fe30978b5af in QEventDispatcherGlib::processEvents (this=this@entry=0x18cebe0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#46 0x00007fe2fa6101a1 in QPAEventDispatcherGlib::processEvents (this=0x18cebe0, flags=...) at qeventdispatcher_glib.cpp:69
#47 0x00007fe30973264a in QEventLoop::exec (this=this@entry=0x7ffd44a95dd0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#48 0x00007fe30973b854 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1332
#49 0x00007fe30f85715a in kdemain () from /usr/lib/x86_64-linux-gnu/libkdeinit5_dolphin.so
#50 0x00007fe30f469830 in __libc_start_main (main=0x4006b0, argc=2, argv=0x7ffd44a96098, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd44a96088) at ../csu/libc-start.c:291
#51 0x00000000004006e9 in _start ()

Reported using DrKonqi