Application: dolphin (17.12.2)

Qt Version: 5.9.4
Frameworks Version: 5.44.0
Operating System: Linux 4.16.5-200.fc27.x86_64 x86_64
Distribution: "Fedora release 27 (Twenty Seven)"

-- Information about the crash:
- What I was doing when the application crashed:
The crash happens when copying/moving files between local disk and external USB drive, and when selecting the properties options to do file size calculations in directories or selected files. 

- Unusual behavior I noticed:
While the local file system is busy with hard drive, or file copies there is a considerable delay in machine functions. when copies or disk activity is little, then machine is responsive again. This is from using F26 onwards. Previous versions did not display such lag. and then when a lag occurs, it sometimes crahes/closes.

-- Backtrace:
Application: Dolphin (dolphin), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f43f32bf940 (LWP 6068))]

Thread 7 (Thread 0x7f43b7777700 (LWP 6075)):
#0  0x00007f43e24083d9 in g_mutex_lock () at /lib64/libglib-2.0.so.0
#1  0x00007f43e23c1ec4 in g_main_context_release () at /lib64/libglib-2.0.so.0
#2  0x00007f43e23c2e56 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#3  0x00007f43e23c2fac in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x00007f43eb9b9c4b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f43eb96796a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f43eb7b88ca in QThread::exec() () at /lib64/libQt5Core.so.5
#7  0x00007f43eb7bcde2 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f43e6d8f50b in start_thread () at /lib64/libpthread.so.0
#9  0x00007f43eab6516f in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7f43bcaf7700 (LWP 6074)):
#0  0x00007f43e6d9582d in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f43cb0357ab in thread_function () at /usr/lib64/dri/swrast_dri.so
#2  0x00007f43cb035627 in impl_thrd_routine () at /usr/lib64/dri/swrast_dri.so
#3  0x00007f43e6d8f50b in start_thread () at /lib64/libpthread.so.0
#4  0x00007f43eab6516f in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7f43c8945700 (LWP 6073)):
#0  0x00007f43e6d9582d in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f43cb0357ab in thread_function () at /usr/lib64/dri/swrast_dri.so
#2  0x00007f43cb035627 in impl_thrd_routine () at /usr/lib64/dri/swrast_dri.so
#3  0x00007f43e6d8f50b in start_thread () at /lib64/libpthread.so.0
#4  0x00007f43eab6516f in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7f43c9146700 (LWP 6072)):
#0  0x00007f43e6d9582d in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f43cb0357ab in thread_function () at /usr/lib64/dri/swrast_dri.so
#2  0x00007f43cb035627 in impl_thrd_routine () at /usr/lib64/dri/swrast_dri.so
#3  0x00007f43e6d8f50b in start_thread () at /lib64/libpthread.so.0
#4  0x00007f43eab6516f in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f43c9947700 (LWP 6071)):
#0  0x00007f43e6d9582d in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f43cb0357ab in thread_function () at /usr/lib64/dri/swrast_dri.so
#2  0x00007f43cb035627 in impl_thrd_routine () at /usr/lib64/dri/swrast_dri.so
#3  0x00007f43e6d8f50b in start_thread () at /lib64/libpthread.so.0
#4  0x00007f43eab6516f in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f43d1cf7700 (LWP 6070)):
#0  0x00007f43eab5ac6b in poll () at /lib64/libc.so.6
#1  0x00007f43e23c2e99 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f43e23c2fac in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f43eb9b9c4b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f43eb96796a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f43eb7b88ca in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f43ed99d449 in QDBusConnectionManager::run() () at /lib64/libQt5DBus.so.5
#7  0x00007f43eb7bcde2 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f43e6d8f50b in start_thread () at /lib64/libpthread.so.0
#9  0x00007f43eab6516f in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f43f32bf940 (LWP 6068)):
[KCrash Handler]
#6  0x00007f43eb8c72eb in QUrl::QUrl(QUrl const&) () at /lib64/libQt5Core.so.5
#7  0x00007f43eee7db1a in KIO::CopyJobPrivate::skip(QUrl const&, bool) () at /lib64/libKF5KIOCore.so.5
#8  0x00007f43eee82a86 in KIO::CopyJobPrivate::slotResultErrorCopyingFiles(KJob*) () at /lib64/libKF5KIOCore.so.5
#9  0x00007f43eee83052 in KIO::CopyJobPrivate::slotResultCopyingFiles(KJob*) () at /lib64/libKF5KIOCore.so.5
#10 0x00007f43eee84e6b in KIO::CopyJob::slotResult(KJob*) () at /lib64/libKF5KIOCore.so.5
#11 0x00007f43eb991637 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#12 0x00007f43ed72ba9c in KJob::result(KJob*, KJob::QPrivateSignal) () at /lib64/libKF5CoreAddons.so.5
#13 0x00007f43ed72c5d1 in KJob::finishJob(bool) () at /lib64/libKF5CoreAddons.so.5
#14 0x00007f43eeec5779 in KIO::FileCopyJob::slotResult(KJob*) () at /lib64/libKF5KIOCore.so.5
#15 0x00007f43eb991637 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#16 0x00007f43ed72ba9c in KJob::result(KJob*, KJob::QPrivateSignal) () at /lib64/libKF5CoreAddons.so.5
#17 0x00007f43ed72c5d1 in KJob::finishJob(bool) () at /lib64/libKF5CoreAddons.so.5
#18 0x00007f43eeed4aa8 in KIO::SimpleJob::slotFinished() () at /lib64/libKF5KIOCore.so.5
#19 0x00007f43eeed2e5b in KIO::SimpleJob::slotError(int, QString const&) () at /lib64/libKF5KIOCore.so.5
#20 0x00007f43eb991637 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#21 0x00007f43eeeaa656 in KIO::SlaveInterface::error(int, QString const&) () at /lib64/libKF5KIOCore.so.5
#22 0x00007f43eeeae6f2 in KIO::SlaveInterface::dispatch(int, QByteArray const&) () at /lib64/libKF5KIOCore.so.5
#23 0x00007f43eeeaacd7 in KIO::SlaveInterface::dispatch() () at /lib64/libKF5KIOCore.so.5
#24 0x00007f43eeeb01d1 in KIO::Slave::gotInput() () at /lib64/libKF5KIOCore.so.5
#25 0x00007f43eb991513 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#26 0x00007f43eee54439 in KIO::ConnectionPrivate::dequeue() [clone .part.12] () at /lib64/libKF5KIOCore.so.5
#27 0x00007f43eb99226a in QObject::event(QEvent*) () at /lib64/libQt5Core.so.5
#28 0x00007f43ecca192c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#29 0x00007f43ecca9174 in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#30 0x00007f43eb968be7 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#31 0x00007f43eb96b36b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /lib64/libQt5Core.so.5
#32 0x00007f43eb9b9e43 in postEventSourceDispatch(_GSource*, int (*)(void*), void*) () at /lib64/libQt5Core.so.5
#33 0x00007f43e23c2b77 in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#34 0x00007f43e23c2f20 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#35 0x00007f43e23c2fac in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#36 0x00007f43eb9b9c2f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#37 0x00007f43eb96796a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#38 0x00007f43ece8cf47 in QDialog::exec() () at /lib64/libQt5Widgets.so.5
#39 0x00007f43f0e8db90 in KIO::JobUiDelegate::askSkip(KJob*, QFlags<KIO::SkipDialog_Option>, QString const&) () at /lib64/libKF5KIOWidgets.so.5
#40 0x00007f43eee82a4f in KIO::CopyJobPrivate::slotResultErrorCopyingFiles(KJob*) () at /lib64/libKF5KIOCore.so.5
#41 0x00007f43eee83052 in KIO::CopyJobPrivate::slotResultCopyingFiles(KJob*) () at /lib64/libKF5KIOCore.so.5
#42 0x00007f43eee84e6b in KIO::CopyJob::slotResult(KJob*) () at /lib64/libKF5KIOCore.so.5
#43 0x00007f43eb991637 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#44 0x00007f43ed72ba9c in KJob::result(KJob*, KJob::QPrivateSignal) () at /lib64/libKF5CoreAddons.so.5
#45 0x00007f43ed72c5d1 in KJob::finishJob(bool) () at /lib64/libKF5CoreAddons.so.5
#46 0x00007f43eeec5779 in KIO::FileCopyJob::slotResult(KJob*) () at /lib64/libKF5KIOCore.so.5
#47 0x00007f43eb991637 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#48 0x00007f43ed72ba9c in KJob::result(KJob*, KJob::QPrivateSignal) () at /lib64/libKF5CoreAddons.so.5
#49 0x00007f43ed72c5d1 in KJob::finishJob(bool) () at /lib64/libKF5CoreAddons.so.5
#50 0x00007f43eeed4aa8 in KIO::SimpleJob::slotFinished() () at /lib64/libKF5KIOCore.so.5
#51 0x00007f43eeed2e5b in KIO::SimpleJob::slotError(int, QString const&) () at /lib64/libKF5KIOCore.so.5
#52 0x00007f43eb991637 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#53 0x00007f43eeeaa656 in KIO::SlaveInterface::error(int, QString const&) () at /lib64/libKF5KIOCore.so.5
#54 0x00007f43eeeae6f2 in KIO::SlaveInterface::dispatch(int, QByteArray const&) () at /lib64/libKF5KIOCore.so.5
#55 0x00007f43eeeaacd7 in KIO::SlaveInterface::dispatch() () at /lib64/libKF5KIOCore.so.5
#56 0x00007f43eeeb01d1 in KIO::Slave::gotInput() () at /lib64/libKF5KIOCore.so.5
#57 0x00007f43eb991513 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#58 0x00007f43eee54439 in KIO::ConnectionPrivate::dequeue() [clone .part.12] () at /lib64/libKF5KIOCore.so.5
#59 0x00007f43eb99226a in QObject::event(QEvent*) () at /lib64/libQt5Core.so.5
#60 0x00007f43ecca192c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#61 0x00007f43ecca9174 in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#62 0x00007f43eb968be7 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#63 0x00007f43eb96b36b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /lib64/libQt5Core.so.5
#64 0x00007f43eb9b9e43 in postEventSourceDispatch(_GSource*, int (*)(void*), void*) () at /lib64/libQt5Core.so.5
#65 0x00007f43e23c2b77 in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#66 0x00007f43e23c2f20 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#67 0x00007f43e23c2fac in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#68 0x00007f43eb9b9c2f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#69 0x00007f43eb96796a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#70 0x00007f43eb970094 in QCoreApplication::exec() () at /lib64/libQt5Core.so.5
#71 0x00007f43f2e6bcfa in kdemain () at /lib64/libkdeinit5_dolphin.so
#72 0x00007f43eaa90f2a in __libc_start_main () at /lib64/libc.so.6
#73 0x0000556dadc7baea in _start ()

Reported using DrKonqi