Bug 400863

Application: dolphin (18.08.3)

Qt Version: 5.11.2
Frameworks Version: 5.51.0
Operating System: Linux 4.15.0-38-generic x86_64
Distribution: KDE neon User Edition 5.14

-- Information about the crash:
- What I was doing when the application crashed:
Application crashes instantly when pressing the icon selection button in the properties dialog of a folder.
It only happens on Dolphin. Icon selection button at KDE Menu Editor still works fine.

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 0x7fab58d20e40 (LWP 18975))]

Thread 5 (Thread 0x7fab1ffff700 (LWP 18981)):
#0  0x00007fab585960b4 in __GI___libc_read (fd=20, buf=0x7fab1fffeb90, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007fab4b046a00 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fab4b001f27 in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fab4b0023e0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fab4b00254c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fab5278604b in QEventDispatcherGlib::processEvents (this=0x7fab18000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0x00007fab5272a30a in QEventLoop::exec (this=this@entry=0x7fab1fffeda0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#7  0x00007fab52555bba in QThread::exec (this=<optimized out>) at thread/qthread.cpp:525
#8  0x00007fab52560adb in QThreadPrivate::start (arg=0x56105ebc91a0) at thread/qthread_unix.cpp:367
#9  0x00007fab4d3ea6db in start_thread (arg=0x7fab1ffff700) at pthread_create.c:463
#10 0x00007fab585a788f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fab2cf6f700 (LWP 18980)):
#0  0x00007fab4d3f09f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x56105e7edd78) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x56105e7edd28, cond=0x56105e7edd50) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x56105e7edd50, mutex=0x56105e7edd28) at pthread_cond_wait.c:655
#3  0x00007fab32a1d46b in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#4  0x00007fab32a1d197 in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#5  0x00007fab4d3ea6db in start_thread (arg=0x7fab2cf6f700) at pthread_create.c:463
#6  0x00007fab585a788f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fab2dd98700 (LWP 18979)):
#0  0x00007fab4d3f09f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x56105ea983a4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x56105ea98350, cond=0x56105ea98378) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x56105ea98378, mutex=0x56105ea98350) at pthread_cond_wait.c:655
#3  0x00007fab32a1d46b in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#4  0x00007fab32a1d197 in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#5  0x00007fab4d3ea6db in start_thread (arg=0x7fab2dd98700) at pthread_create.c:463
#6  0x00007fab585a788f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fab39c70700 (LWP 18978)):
#0  0x00007fab5859abf9 in __GI___poll (fds=0x7fab3401b520, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fab4b002439 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fab4b00254c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fab5278604b in QEventDispatcherGlib::processEvents (this=0x7fab34000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fab5272a30a in QEventLoop::exec (this=this@entry=0x7fab39c6fd70, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#5  0x00007fab52555bba in QThread::exec (this=<optimized out>) at thread/qthread.cpp:525
#6  0x00007fab52bcce45 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007fab52560adb in QThreadPrivate::start (arg=0x7fab52e44d60) at thread/qthread_unix.cpp:367
#8  0x00007fab4d3ea6db in start_thread (arg=0x7fab39c70700) at pthread_create.c:463
#9  0x00007fab585a788f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fab58d20e40 (LWP 18975)):
[KCrash Handler]
#6  0x00007fab525dd836 in QString::size (this=this@entry=0x56105f11b440) at ../../include/QtCore/../../src/corelib/tools/qstring.h:239
#7  QString::lastIndexOf (this=this@entry=0x56105f11b440, ch=ch@entry=..., from=from@entry=-1, cs=cs@entry=Qt::CaseSensitive) at tools/qstring.cpp:3723
#8  0x00007fab55d94897 in sortByFileName (path1=..., path2=...) at ./src/kicondialog.cpp:418
#9  0x00007fab55d984c0 in __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(QString const&, QString const&)>::operator()<QList<QString>::iterator, QList<QString>::iterator> (__it2=..., __it1=..., this=<synthetic pointer>) at /usr/include/c++/7/bits/predefined_ops.h:143
#10 std::__unguarded_partition<QList<QString>::iterator, __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(QString const&, QString const&)> > (__comp=..., __pivot=..., __last=..., __first=...) at /usr/include/c++/7/bits/stl_algo.h:1902
#11 std::__unguarded_partition_pivot<QList<QString>::iterator, __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(QString const&, QString const&)> > (__comp=..., __last=..., __first=...) at /usr/include/c++/7/bits/stl_algo.h:1923
#12 std::__introsort_loop<QList<QString>::iterator, int, __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(QString const&, QString const&)> > (__first=..., __last=..., __depth_limit=<optimized out>, __depth_limit@entry=14, __comp=__comp@entry=...) at /usr/include/c++/7/bits/stl_algo.h:1952
#13 0x00007fab55d98520 in std::__introsort_loop<QList<QString>::iterator, int, __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(QString const&, QString const&)> > (__first=..., __last=..., __depth_limit=<optimized out>, __depth_limit@entry=15, __comp=__comp@entry=...) at /usr/include/c++/7/bits/stl_algo.h:1954
#14 0x00007fab55d98520 in std::__introsort_loop<QList<QString>::iterator, int, __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(QString const&, QString const&)> > (__first=..., __last=..., __depth_limit=<optimized out>, __depth_limit@entry=16, __comp=__comp@entry=...) at /usr/include/c++/7/bits/stl_algo.h:1954
#15 0x00007fab55d98520 in std::__introsort_loop<QList<QString>::iterator, int, __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(QString const&, QString const&)> > (__first=..., __last=..., __depth_limit=<optimized out>, __depth_limit@entry=17, __comp=__comp@entry=...) at /usr/include/c++/7/bits/stl_algo.h:1954
#16 0x00007fab55d98520 in std::__introsort_loop<QList<QString>::iterator, int, __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(QString const&, QString const&)> > (__first=..., __last=..., __depth_limit=<optimized out>, __depth_limit@entry=18, __comp=__comp@entry=...) at /usr/include/c++/7/bits/stl_algo.h:1954
#17 0x00007fab55d96861 in std::__sort<QList<QString>::iterator, __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(QString const&, QString const&)> > (__comp=..., __last=..., __first=...) at /usr/include/c++/7/bits/stl_algo.h:1968
#18 std::sort<QList<QString>::iterator, bool (*)(QString const&, QString const&)> (__comp=0x7fab55d94860 <sortByFileName(QString const&, QString const&)>, __last=..., __first=...) at /usr/include/c++/7/bits/stl_algo.h:4868
#19 KIconDialog::KIconDialogPrivate::showIcons (this=0x56105eeec4d0) at ./src/kicondialog.cpp:447
#20 0x00007fab55d987e7 in ShowEventFilter::eventFilter (this=0x56105ef3e140, watched=0x56105eeec450, event=0x7ffc01a0a400) at ./src/kicondialog.cpp:243
#21 0x00007fab5272bd6d in QCoreApplicationPrivate::sendThroughObjectEventFilters (receiver=receiver@entry=0x56105eeec450, event=event@entry=0x7ffc01a0a400) at kernel/qcoreapplication.cpp:1174
#22 0x00007fab53747df5 in QApplicationPrivate::notify_helper (this=this@entry=0x56105e7644b0, receiver=receiver@entry=0x56105eeec450, e=e@entry=0x7ffc01a0a400) at kernel/qapplication.cpp:3723
#23 0x00007fab5374f3ef in QApplication::notify (this=0x7ffc01a0b2d0, receiver=0x56105eeec450, e=0x7ffc01a0a400) at kernel/qapplication.cpp:3486
#24 0x00007fab5272bfe8 in QCoreApplication::notifyInternal2 (receiver=receiver@entry=0x56105eeec450, event=event@entry=0x7ffc01a0a400) at kernel/qcoreapplication.cpp:1048
#25 0x00007fab53783508 in QCoreApplication::sendEvent (event=0x7ffc01a0a400, receiver=0x56105eeec450) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#26 QWidgetPrivate::show_helper (this=this@entry=0x56105ed84cc0) at kernel/qwidget.cpp:8045
#27 0x00007fab5378663b in QWidget::setVisible (this=this@entry=0x56105eeec450, visible=visible@entry=true) at kernel/qwidget.cpp:8341
#28 0x00007fab539372ec in QDialog::setVisible (this=0x56105eeec450, visible=<optimized out>) at dialogs/qdialog.cpp:724
#29 0x00007fab55d93fcb in KIconButton::KIconButtonPrivate::_k_slotChangeIcon (this=0x56105eeec260) at ./src/kiconbutton.cpp:168
#30 0x00007fab5275b18f in QtPrivate::QSlotObjectBase::call (a=0x7ffc01a0a6b0, r=0x56105eeebfc0, this=0x56105eeec2a0) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:376
#31 QMetaObject::activate (sender=sender@entry=0x56105eeebfc0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x7ffc01a0a6b0) at kernel/qobject.cpp:3754
#32 0x00007fab5275b747 in QMetaObject::activate (sender=sender@entry=0x56105eeebfc0, m=m@entry=0x7fab53e17bc0 <QAbstractButton::staticMetaObject>, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x7ffc01a0a6b0) at kernel/qobject.cpp:3633
#33 0x00007fab5382cfb2 in QAbstractButton::clicked (this=this@entry=0x56105eeebfc0, _t1=<optimized out>) at .moc/moc_qabstractbutton.cpp:308
#34 0x00007fab5382d1ca in QAbstractButtonPrivate::emitClicked (this=0x56105eeec000) at widgets/qabstractbutton.cpp:414
#35 0x00007fab5382e5aa in QAbstractButtonPrivate::click (this=0x56105eeec000) at widgets/qabstractbutton.cpp:407
#36 0x00007fab5382e79d in QAbstractButton::mouseReleaseEvent (this=0x56105eeebfc0, e=0x7ffc01a0ab60) at widgets/qabstractbutton.cpp:1011
#37 0x00007fab53786a98 in QWidget::event (this=0x56105eeebfc0, event=0x7ffc01a0ab60) at kernel/qwidget.cpp:9287
#38 0x00007fab53747e1c in QApplicationPrivate::notify_helper (this=this@entry=0x56105e7644b0, receiver=receiver@entry=0x56105eeebfc0, e=e@entry=0x7ffc01a0ab60) at kernel/qapplication.cpp:3727
#39 0x00007fab5374ff87 in QApplication::notify (this=<optimized out>, receiver=0x56105eeebfc0, e=0x7ffc01a0ab60) at kernel/qapplication.cpp:3203
#40 0x00007fab5272bfe8 in QCoreApplication::notifyInternal2 (receiver=receiver@entry=0x56105eeebfc0, event=event@entry=0x7ffc01a0ab60) at kernel/qcoreapplication.cpp:1048
#41 0x00007fab5374e8d2 in QCoreApplication::sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#42 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x56105eeebfc0, event=event@entry=0x7ffc01a0ab60, alienWidget=alienWidget@entry=0x56105eeebfc0, nativeWidget=0x56105ef0b600, buttonDown=buttonDown@entry=0x7fab53e41850 <qt_button_down>, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:2695
#43 0x00007fab537a1c13 in QWidgetWindow::handleMouseEvent (this=this@entry=0x56105efb84f0, event=event@entry=0x7ffc01a0af60) at kernel/qwidgetwindow.cpp:658
#44 0x00007fab537a4229 in QWidgetWindow::event (this=0x56105efb84f0, event=0x7ffc01a0af60) at kernel/qwidgetwindow.cpp:280
#45 0x00007fab53747e1c in QApplicationPrivate::notify_helper (this=this@entry=0x56105e7644b0, receiver=receiver@entry=0x56105efb84f0, e=e@entry=0x7ffc01a0af60) at kernel/qapplication.cpp:3727
#46 0x00007fab5374f3ef in QApplication::notify (this=0x7ffc01a0b2d0, receiver=0x56105efb84f0, e=0x7ffc01a0af60) at kernel/qapplication.cpp:3486
#47 0x00007fab5272bfe8 in QCoreApplication::notifyInternal2 (receiver=receiver@entry=0x56105efb84f0, event=event@entry=0x7ffc01a0af60) at kernel/qcoreapplication.cpp:1048
#48 0x00007fab52f4b7bb in QCoreApplication::sendSpontaneousEvent (event=0x7ffc01a0af60, receiver=0x56105efb84f0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:237
#49 QGuiApplicationPrivate::processMouseEvent (e=0x56105ea5a380) at kernel/qguiapplication.cpp:2082
#50 0x00007fab52f4d335 in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x56105ea5a380) at kernel/qguiapplication.cpp:1817
#51 0x00007fab52f25f5b in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:1032
#52 0x00007fab4395276b in QPAEventDispatcherGlib::processEvents (this=0x56105e7bf5a0, flags=...) at qeventdispatcher_glib.cpp:70
#53 0x00007fab5272a30a in QEventLoop::exec (this=this@entry=0x7ffc01a0b1d0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#54 0x00007fab527334d0 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1336
#55 0x00007fab52f419cc in QGuiApplication::exec () at kernel/qguiapplication.cpp:1762
#56 0x00007fab53747d75 in QApplication::exec () at kernel/qapplication.cpp:2901
#57 0x00007fab588bb03a in kdemain (argc=<optimized out>, argv=<optimized out>) at ./src/main.cpp:166
#58 0x00007fab584a7b97 in __libc_start_main (main=0x56105c5ce720 <main>, argc=1, argv=0x7ffc01a0b458, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc01a0b448) at ../csu/libc-start.c:310
#59 0x000056105c5ce75a in _start ()

Reported using DrKonqi