I was able to reproduce the crash. This time it occurred when unplugging a USB flash drive while a file transfer was in process from an internal HDD to an external HDD. As soon as the USB flash drive was unplugged, Dolphin crashed and the tile transfer failed.

Application: Dolphin (dolphin), signal: Segmentation fault

[KCrash Handler]
#4  0x00007f94126dbf24 in QList<QPointer<QObject> >::Node::t (this=0x559d26965180) at ../../include/QtCore/../../src/corelib/tools/qlist.h:153
#5  QList<QPointer<QObject> >::at (i=0, this=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qlist.h:572
#6  QCoreApplicationPrivate::sendThroughObjectEventFilters (receiver=receiver@entry=0x559faef2a1e0, event=event@entry=0x7ffffe4096a0) at kernel/qcoreapplication.cpp:1183
#7  0x00007f94133a53ee in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x559faef2a1e0, e=0x7ffffe4096a0) at kernel/qapplication.cpp:3631
#8  0x00007f94126dc178 in QCoreApplication::notifyInternal2 (receiver=0x559faef2a1e0, event=0x7ffffe4096a0) at kernel/qcoreapplication.cpp:1064
#9  0x00007f94133e80cb in QWidget::setParent (this=this@entry=0x559faf5f8470, parent=<optimized out>, parent@entry=0x559faef2a1e0, f=...) at kernel/qwidget.cpp:10497
#10 0x00007f94133e85a6 in QWidgetPrivate::init (this=0x559faf3fdb40, parentWidget=<optimized out>, f=...) at kernel/qwidget.cpp:1044
#11 0x00007f94135ac42c in QDialog::QDialog (this=this@entry=0x559faf5f8470, parent=0x559faef2a1e0, f=..., f@entry=...) at dialogs/qdialog.cpp:400
#12 0x00007f94144c5e79 in KIO::SkipDialog::SkipDialog (this=<optimized out>, parent=<optimized out>, options=..., _error_text=..., this=<optimized out>, parent=<optimized out>, options=..., _error_text=...) at /usr/include/qt5/QtCore/qflags.h:120
#13 0x00007f94144d0a3f in KIO::WidgetsAskUserActionHandler::askUserSkip (this=0x559faf660460, job=0x559faf661e20, options=..., errorText=...) at /usr/src/debug/kio-5.98.0-1.1.x86_64/src/widgets/widgetsaskuseractionhandler.cpp:176
#14 0x00007f941424564a in KIO::CopyJobPrivate::slotResultErrorCopyingFiles (this=<optimized out>, job=0x559fb05f3340) at /usr/src/debug/kio-5.98.0-1.1.x86_64/src/core/copyjob.cpp:1766
#15 0x00007f941271305d in QtPrivate::QSlotObjectBase::call (a=0x7ffffe409b20, r=0x559faf661e20, this=0x559fb0a7fdf0) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
#16 doActivate<false> (sender=0x559fb05f3340, signal_index=6, argv=0x7ffffe409b20) at kernel/qobject.cpp:3919
#17 0x00007f941270c4df in QMetaObject::activate (sender=sender@entry=0x559fb05f3340, m=<optimized out>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7ffffe409b20) at kernel/qobject.cpp:3979
#18 0x00007f9413aaabd5 in KJob::result (this=this@entry=0x559fb05f3340, _t1=<optimized out>, _t1@entry=0x559fb05f3340, _t2=...) at /usr/src/debug/kcoreaddons-5.98.0-1.1.x86_64/build/src/lib/KF5CoreAddons_autogen/include/moc_kjob.cpp:633
#19 0x00007f9413aaee1b in KJob::finishJob (this=0x559fb05f3340, emitResult=<optimized out>) at /usr/src/debug/kcoreaddons-5.98.0-1.1.x86_64/src/lib/jobs/kjob.cpp:98
#20 0x00007f941271305d in QtPrivate::QSlotObjectBase::call (a=0x7ffffe409c40, r=0x559fb05f3340, this=0x559fb0666630) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
#21 doActivate<false> (sender=0x559fb00958f0, signal_index=6, argv=0x7ffffe409c40) at kernel/qobject.cpp:3919
#22 0x00007f941270c4df in QMetaObject::activate (sender=sender@entry=0x559fb00958f0, m=<optimized out>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7ffffe409c40) at kernel/qobject.cpp:3979
#23 0x00007f9413aaabd5 in KJob::result (this=this@entry=0x559fb00958f0, _t1=<optimized out>, _t1@entry=0x559fb00958f0, _t2=...) at /usr/src/debug/kcoreaddons-5.98.0-1.1.x86_64/build/src/lib/KF5CoreAddons_autogen/include/moc_kjob.cpp:633
#24 0x00007f9413aaee1b in KJob::finishJob (this=0x559fb00958f0, emitResult=<optimized out>) at /usr/src/debug/kcoreaddons-5.98.0-1.1.x86_64/src/lib/jobs/kjob.cpp:98
#25 0x00007f941271305d in QtPrivate::QSlotObjectBase::call (a=0x7ffffe409d60, r=0x559fb00958f0, this=0x559fb1075c80) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
#26 doActivate<false> (sender=0x559faefedd10, signal_index=5, argv=0x7ffffe409d60) at kernel/qobject.cpp:3919
#27 0x00007f941270c4df in QMetaObject::activate (sender=sender@entry=0x559faefedd10, m=<optimized out>, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x7ffffe409d60) at kernel/qobject.cpp:3979
#28 0x00007f94142689e6 in KIO::SlaveInterface::error (this=this@entry=0x559faefedd10, _t1=<optimized out>, _t2=...) at /usr/src/debug/kio-5.98.0-1.1.x86_64/build/src/core/KF5KIOCore_autogen/include/moc_slaveinterface.cpp:452
#29 0x00007f941426d838 in KIO::SlaveInterface::dispatch (this=0x559faefedd10, _cmd=102, rawdata=...) at /usr/src/debug/kio-5.98.0-1.1.x86_64/src/core/slaveinterface.cpp:181
#30 0x00007f9414268826 in KIO::SlaveInterface::dispatch (this=0x559faefedd10) at /usr/src/debug/kio-5.98.0-1.1.x86_64/src/core/slaveinterface.cpp:78
#31 0x00007f941426ae99 in KIO::Slave::gotInput (this=0x559faefedd10) at /usr/src/debug/kio-5.98.0-1.1.x86_64/src/core/slave.cpp:346
#32 0x00007f941271305d in QtPrivate::QSlotObjectBase::call (a=0x7ffffe409f70, r=0x559faefedd10, this=0x559faf10e0e0) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
#33 doActivate<false> (sender=0x559faea1b100, signal_index=3, argv=0x7ffffe409f70) at kernel/qobject.cpp:3919
#34 0x00007f94127079d0 in QObject::event (this=0x559faea1b100, e=0x559faf598560) at kernel/qobject.cpp:1347
#35 0x00007f94133a53fe in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x559faea1b100, e=0x559faf598560) at kernel/qapplication.cpp:3637
#36 0x00007f94126dc178 in QCoreApplication::notifyInternal2 (receiver=0x559faea1b100, event=0x559faf598560) at kernel/qcoreapplication.cpp:1064
#37 0x00007f94126df111 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x559fae72cad0) at kernel/qcoreapplication.cpp:1821
#38 0x00007f9412734003 in postEventSourceDispatch (s=0x559fae8ac350) at kernel/qeventdispatcher_glib.cpp:277
#39 0x00007f9410320a50 in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#40 0x00007f9410320e08 in ?? () from /lib64/libglib-2.0.so.0
#41 0x00007f9410320e9c in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#42 0x00007f9412733806 in QEventDispatcherGlib::processEvents (this=0x559fae8ba810, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#43 0x00007f94126dabeb in QEventLoop::exec (this=this@entry=0x7ffffe40a360, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:69
#44 0x00007f94126e2d56 in QCoreApplication::exec () at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#45 0x0000559fada38244 in main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/dolphin-22.08.1-1.1.x86_64/src/main.cpp:223
[Inferior 1 (process 21510) detached]

Created attachment 157794 [details]
New crash information added by DrKonqi

dolphin (22.12.3) using Qt 5.15.8

I think this is the same issue here. I was copying 134,1 GiB of files to a Network  drive. The network drive went offline, so I paused the file transfer and resumed it after the drive was back online. Some time after that (I'm not sure how long it took, if it was immediately or after some time), Dolphin crashed

-- Backtrace (Reduced):
#6  0x00007fd27c398f55 in QWidget::testAttribute_helper(Qt::WidgetAttribute) const () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#7  0x00007fd27c3a22af in QWidgetPrivate::createWinId() () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#8  0x00007fd27c3a202d in QWidget::create(unsigned long long, bool, bool) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#9  0x00007fd27c3af34e in QWidgetPrivate::setVisible(bool) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#10 0x00007fd27c5804c8 in QDialog::setVisible(bool) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5

How did you initiate the file transfer exactly ?

Was it in dolphin by drag and drop ? Or using Copy+Paste ? Another way ?

Did you the origin directory and destination directories have any file with the same name ?

(In reply to niklas312 from comment #2)
> Created attachment 157794 [details]
> New crash information added by DrKonqi
> 
> dolphin (22.12.3) using Qt 5.15.8
> 
> I think this is the same issue here. I was copying 134,1 GiB of files to a
> Network  drive. The network drive went offline, so I paused the file
> transfer and resumed it after the drive was back online. Some time after
> that (I'm not sure how long it took, if it was immediately or after some
> time), Dolphin crashed
> 
> -- Backtrace (Reduced):
> #6  0x00007fd27c398f55 in QWidget::testAttribute_helper(Qt::WidgetAttribute)
> const () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
> #7  0x00007fd27c3a22af in QWidgetPrivate::createWinId() () from
> /lib/x86_64-linux-gnu/libQt5Widgets.so.5
> #8  0x00007fd27c3a202d in QWidget::create(unsigned long long, bool, bool) ()
> from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
> #9  0x00007fd27c3af34e in QWidgetPrivate::setVisible(bool) () from
> /lib/x86_64-linux-gnu/libQt5Widgets.so.5
> #10 0x00007fd27c5804c8 in QDialog::setVisible(bool) () from
> /lib/x86_64-linux-gnu/libQt5Widgets.so.5

Could you install framework kio debug symbols ?

(In reply to Méven Car from comment #3)
> How did you initiate the file transfer exactly ?
> 
> Was it in dolphin by drag and drop ? Or using Copy+Paste ? Another way ?
> 
> Did you the origin directory and destination directories have any file with
> the same name ?
> 
> (In reply to niklas312 from comment #2)
> > Created attachment 157794 [details]
> > New crash information added by DrKonqi
> > 
> > dolphin (22.12.3) using Qt 5.15.8
> > 
> > I think this is the same issue here. I was copying 134,1 GiB of files to a
> > Network  drive. The network drive went offline, so I paused the file
> > transfer and resumed it after the drive was back online. Some time after
> > that (I'm not sure how long it took, if it was immediately or after some
> > time), Dolphin crashed
> > 
> > -- Backtrace (Reduced):
> > #6  0x00007fd27c398f55 in QWidget::testAttribute_helper(Qt::WidgetAttribute)
> > const () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
> > #7  0x00007fd27c3a22af in QWidgetPrivate::createWinId() () from
> > /lib/x86_64-linux-gnu/libQt5Widgets.so.5
> > #8  0x00007fd27c3a202d in QWidget::create(unsigned long long, bool, bool) ()
> > from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
> > #9  0x00007fd27c3af34e in QWidgetPrivate::setVisible(bool) () from
> > /lib/x86_64-linux-gnu/libQt5Widgets.so.5
> > #10 0x00007fd27c5804c8 in QDialog::setVisible(bool) () from
> > /lib/x86_64-linux-gnu/libQt5Widgets.so.5
> 
> Could you install framework kio debug symbols ?

I initiated the file transfer with Copy+Paste inside two different Dolphin-tabs.
The source and destination didn't have any same files, since I copied a completely new folder.

As for the "framework kio debug symbols", of course I can install them I just don't know the package name

(In reply to niklas312 from comment #4)
> (In reply to Méven Car from comment #3)
> > 
> > Could you install framework kio debug symbols ?
> 
> I initiated the file transfer with Copy+Paste inside two different
> Dolphin-tabs.
> The source and destination didn't have any same files, since I copied a
> completely new folder.

Thanks.

> 
> As for the "framework kio debug symbols", of course I can install them I
> just don't know the package name

It would depend on your distro.
This should be libkf5kiocore5-dbgsym and libkf5kiofilewidgets5-dbgsym for debian and ubuntu for instance.

(In reply to Méven Car from comment #5)
> It would depend on your distro.
> This should be libkf5kiocore5-dbgsym and libkf5kiofilewidgets5-dbgsym for
> debian and ubuntu for instance.

Thanks, I installed them now.

*** Bug 468345 has been marked as a duplicate of this bug. ***

*** This bug has been marked as a duplicate of bug 448532 ***