Bug 428374 - Dolphin crashes when typing in filter bar in specific folder
Summary: Dolphin crashes when typing in filter bar in specific folder
Status: RESOLVED FIXED
Alias: None
Product: dolphin
Classification: Applications
Component: bars: filter (show other bugs)
Version: unspecified
Platform: Other Linux
: VHI crash
Target Milestone: ---
Assignee: Dolphin Bug Assignee
URL:
Keywords: regression
: 428252 428532 428546 (view as bug list)
Depends on:
Blocks:
 
Reported: 2020-10-28 07:53 UTC by Leszek Lesner
Modified: 2020-11-08 22:02 UTC (History)
11 users (show)

See Also:
Latest Commit: https://invent.kde.org/system/dolphin/commit/ee4ab8ce699bd0fd10fe664e053eb6f26da94268
Version Fixed In: 20.11.80
Sentry Crash Report:

Attachments
New crash information added by DrKonqi (13.10 KB, text/plain)
2020-11-03 19:59 UTC, Ismael Asensio 		Details
View All Add an attachment

Note You need to log in before you can comment on or make changes to this bug.
Description Leszek Lesner 2020-10-28 07:53:53 UTC 
SUMMARY
As soon as I type in a letter in the filter bar in one specific folder it crashes dolphin

STEPS TO REPRODUCE
1. 
2. 
3. 

OBSERVED RESULT


EXPECTED RESULT


SOFTWARE/OS VERSIONS
Linux/KDE Plasma: master
(available in About System)
KDE Plasma Version: master
KDE Frameworks Version: master
Qt Version: 5.15.2

ADDITIONAL INFORMATION


Application: Dolphin (dolphin), signal: Aborted
Content of s_kcrashErrorMessage: (null)
[KCrash Handler]
#5  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#6  0x00007f6eff7e6535 in __GI_abort () at abort.c:79
#7  0x00007f6effd9ea05 in qt_message_fatal (context=..., message=<synthetic pointer>...) at /home/leszek/kde/src/Qt5/qtbase/src/corelib/global/qlogging.cpp:1914
#8  QMessageLogger::fatal (this=this@entry=0x7ffd2195d9d0, msg=msg@entry=0x7f6f0006fea0 "ASSERT: \"%s\" in file %s, line %d") at /home/leszek/kde/src/Qt5/qtbase/src/corelib/global/qlogging.cpp:893
#9  0x00007f6effd9df23 in qt_assert (assertion=<optimized out>, file=<optimized out>, line=<optimized out>) at ../../include/QtCore/../../../../../src/Qt5/qtbase/src/corelib/global/qlogging.h:90
#10 0x00007f6f0271edd2 in KItemListView::slotItemsRemoved (this=0x55a2f6f73770, itemRanges=...) at /home/leszek/kde/src/dolphin/src/kitemviews/kitemlistview.cpp:1199
#11 0x00007f6f026d3bcb in KFileItemListView::slotItemsRemoved (this=0x55a2f6f73770, itemRanges=...) at /home/leszek/kde/src/dolphin/src/kitemviews/kfileitemlistview.cpp:309
#12 0x00007f6f0272de7e in QtPrivate::FunctorCall<QtPrivate::IndexesList<0>, QtPrivate::List<KItemRangeList const&>, void, void (KItemListView::*)(KItemRangeList const&)>::call (f=&virtual table offset 536, o=0x55a2f6f73770, arg=0x7ffd2195dce0) at /home/leszek/kde/qt5/include/QtCore/qobjectdefs_impl.h:152
#13 0x00007f6f0272d16a in QtPrivate::FunctionPointer<void (KItemListView::*)(KItemRangeList const&)>::call<QtPrivate::List<KItemRangeList const&>, void> (f=&virtual table offset 536, o=0x55a2f6f73770, arg=0x7ffd2195dce0) at /home/leszek/kde/qt5/include/QtCore/qobjectdefs_impl.h:185
#14 0x00007f6f0272c0db in QtPrivate::QSlotObject<void (KItemListView::*)(KItemRangeList const&), QtPrivate::List<KItemRangeList const&>, void>::impl (which=1, this_=0x55a2f6f75860, r=0x55a2f6f73770, a=0x7ffd2195dce0, ret=0x0) at /home/leszek/kde/qt5/include/QtCore/qobjectdefs_impl.h:418
#15 0x00007f6efffcd66c in QtPrivate::QSlotObjectBase::call (a=0x7ffd2195dce0, r=0x55a2f6f73770, this=0x55a2f6f75860) at ../../include/QtCore/../../../../../src/Qt5/qtbase/src/corelib/kernel/qobjectdefs_impl.h:398
#16 doActivate<false> (sender=0x55a2f6ec3e70, signal_index=4, argv=0x7ffd2195dce0) at /home/leszek/kde/src/Qt5/qtbase/src/corelib/kernel/qobject.cpp:3886
#17 0x00007f6f026c4e0b in KItemModelBase::itemsRemoved (this=0x55a2f6ec3e70, _t1=...) at /home/leszek/kde/build/dolphin/src/dolphinprivate_autogen/Z3MQH7AOBD/moc_kitemmodelbase.cpp:253
#18 0x00007f6f026de3e4 in KFileItemModel::removeItems (this=0x55a2f6ec3e70, itemRanges=..., behavior=KFileItemModel::KeepItemData) at /home/leszek/kde/src/dolphin/src/kitemviews/kfileitemmodel.cpp:1317
#19 0x00007f6f026dbe10 in KFileItemModel::applyFilters (this=0x55a2f6ec3e70) at /home/leszek/kde/src/dolphin/src/kitemviews/kfileitemmodel.cpp:704
#20 0x00007f6f026dbbae in KFileItemModel::setNameFilter (this=0x55a2f6ec3e70, nameFilter=...) at /home/leszek/kde/src/dolphin/src/kitemviews/kfileitemmodel.cpp:658
#21 0x00007f6f0276b61d in DolphinView::setNameFilter (this=0x55a2f6f77fe0, nameFilter=...) at /home/leszek/kde/src/dolphin/src/views/dolphinview.cpp:484
#22 0x00007f6f028aa31c in DolphinViewContainer::setNameFilter (this=0x55a2f6fc6c80, nameFilter=...) at /home/leszek/kde/src/dolphin/src/dolphinviewcontainer.cpp:667
#23 0x00007f6f028ae10d in QtPrivate::FunctorCall<QtPrivate::IndexesList<0>, QtPrivate::List<QString const&>, void, void (DolphinViewContainer::*)(QString const&)>::call (f=(void (DolphinViewContainer::*)(class DolphinViewContainer * const, const class QString &)) 0x7f6f028aa2e0 <DolphinViewContainer::setNameFilter(QString const&)>, o=0x55a2f6fc6c80, arg=0x7ffd2195e060) at /home/leszek/kde/qt5/include/QtCore/qobjectdefs_impl.h:152
#24 0x00007f6f028adc2e in QtPrivate::FunctionPointer<void (DolphinViewContainer::*)(QString const&)>::call<QtPrivate::List<QString const&>, void> (f=(void (DolphinViewContainer::*)(class DolphinViewContainer * const, const class QString &)) 0x7f6f028aa2e0 <DolphinViewContainer::setNameFilter(QString const&)>, o=0x55a2f6fc6c80, arg=0x7ffd2195e060) at /home/leszek/kde/qt5/include/QtCore/qobjectdefs_impl.h:185
#25 0x00007f6f028ad1e7 in QtPrivate::QSlotObject<void (DolphinViewContainer::*)(QString const&), QtPrivate::List<QString const&>, void>::impl (which=1, this_=0x55a2f6b7ad90, r=0x55a2f6fc6c80, a=0x7ffd2195e060, ret=0x0) at /home/leszek/kde/qt5/include/QtCore/qobjectdefs_impl.h:418
#26 0x00007f6efffcd66c in QtPrivate::QSlotObjectBase::call (a=0x7ffd2195e060, r=0x55a2f6fc6c80, this=0x55a2f6b7ad90) at ../../include/QtCore/../../../../../src/Qt5/qtbase/src/corelib/kernel/qobjectdefs_impl.h:398
#27 doActivate<false> (sender=0x55a2f6f2df90, signal_index=7, argv=0x7ffd2195e060) at /home/leszek/kde/src/Qt5/qtbase/src/corelib/kernel/qobject.cpp:3886
#28 0x00007f6f0290ad09 in FilterBar::filterChanged (this=0x55a2f6f2df90, _t1=...) at /home/leszek/kde/build/dolphin/src/dolphinstatic_autogen/A7DZ2KMSNA/moc_filterbar.cpp:174
#29 0x00007f6f028baadf in QtPrivate::FunctorCall<QtPrivate::IndexesList<0>, QtPrivate::List<QString const&>, void, void (FilterBar::*)(QString const&)>::call (f=(void (FilterBar::*)(class FilterBar * const, const class QString &)) 0x7f6f0290acba <FilterBar::filterChanged(QString const&)>, o=0x55a2f6f2df90, arg=0x7ffd2195e210) at /home/leszek/kde/qt5/include/QtCore/qobjectdefs_impl.h:152
#30 0x00007f6f028ba9ca in QtPrivate::FunctionPointer<void (FilterBar::*)(QString const&)>::call<QtPrivate::List<QString const&>, void> (f=(void (FilterBar::*)(class FilterBar * const, const class QString &)) 0x7f6f0290acba <FilterBar::filterChanged(QString const&)>, o=0x55a2f6f2df90, arg=0x7ffd2195e210) at /home/leszek/kde/qt5/include/QtCore/qobjectdefs_impl.h:185
#31 0x00007f6f028ba8ef in QtPrivate::QSlotObject<void (FilterBar::*)(QString const&), QtPrivate::List<QString const&>, void>::impl (which=1, this_=0x55a2f6b7ac50, r=0x55a2f6f2df90, a=0x7ffd2195e210, ret=0x0) at /home/leszek/kde/qt5/include/QtCore/qobjectdefs_impl.h:418
#32 0x00007f6efffcd66c in QtPrivate::QSlotObjectBase::call (a=0x7ffd2195e210, r=0x55a2f6f2df90, this=0x55a2f6b7ac50) at ../../include/QtCore/../../../../../src/Qt5/qtbase/src/corelib/kernel/qobjectdefs_impl.h:398
#33 doActivate<false> (sender=0x55a2f6b7f5d0, signal_index=7, argv=0x7ffd2195e210) at /home/leszek/kde/src/Qt5/qtbase/src/corelib/kernel/qobject.cpp:3886
#34 0x00007f6efffc7982 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7f6f0100ff80 <QLineEdit::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffd2195e210) at /home/leszek/kde/src/Qt5/qtbase/src/corelib/kernel/qobject.cpp:3946
#35 0x00007f6f00c78002 in QLineEdit::textChanged (this=<optimized out>, _t1=...) at .moc/moc_qlineedit.cpp:447
#36 0x00007f6f00c7e209 in QLineEdit::qt_static_metacall (_o=0x55a2f6b7f5d0, _c=<optimized out>, _id=<optimized out>, _a=0x7ffd2195e350) at .moc/moc_qlineedit.cpp:255
#37 0x00007f6efffcd69d in doActivate<false> (sender=0x55a2f6ec7460, signal_index=6, argv=0x7ffd2195e350) at ../../include/QtCore/../../../../../src/Qt5/qtbase/src/corelib/kernel/qobjectdefs_impl.h:395
#38 0x00007f6efffc7982 in QMetaObject::activate (sender=sender@entry=0x55a2f6ec7460, m=m@entry=0x7f6f01010040 <QWidgetLineControl::staticMetaObject>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7ffd2195e350) at /home/leszek/kde/src/Qt5/qtbase/src/corelib/kernel/qobject.cpp:3946
#39 0x00007f6f00c7edd5 in QWidgetLineControl::textChanged (this=this@entry=0x55a2f6ec7460, _t1=...) at .moc/moc_qwidgetlinecontrol_p.cpp:273
#40 0x00007f6f00c81e61 in QWidgetLineControl::finishChange (this=0x55a2f6ec7460, validateFromState=<optimized out>, update=<optimized out>, edited=<optimized out>) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/widgets/qwidgetlinecontrol.cpp:736
#41 0x00007f6f00c84ef9 in QWidgetLineControl::processKeyEvent (this=0x55a2f6ec7460, event=event@entry=0x7ffd2195e990) at ../../include/QtCore/../../../../../src/Qt5/qtbase/src/corelib/tools/qrefcount.h:60
#42 0x00007f6f00c780aa in QLineEdit::keyPressEvent (this=0x55a2f6b7f5d0, event=0x7ffd2195e990) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/widgets/qlineedit.cpp:1794
#43 0x00007f6f00b83b07 in QWidget::event (this=this@entry=0x55a2f6b7f5d0, event=event@entry=0x7ffd2195e990) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/kernel/qwidget.cpp:8678
#44 0x00007f6f00c7db4a in QLineEdit::event (this=0x55a2f6b7f5d0, e=0x7ffd2195e990) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/widgets/qlineedit.cpp:1531
#45 0x00007f6f00b4611e in QApplicationPrivate::notify_helper (this=this@entry=0x55a2f6a50570, receiver=receiver@entry=0x55a2f6b7f5d0, e=e@entry=0x7ffd2195e990) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/kernel/qapplication.cpp:3632
#46 0x00007f6f00b4d251 in QApplication::notify (this=<optimized out>, receiver=0x55a2f6b7f5d0, e=0x7ffd2195e990) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/kernel/qapplication.cpp:2994
#47 0x00007f6efff9aba9 in QCoreApplication::notifyInternal2 (receiver=0x55a2f6b7f5d0, event=0x7ffd2195e990) at ../../include/QtCore/5.15.2/QtCore/private/../../../../../../../../src/Qt5/qtbase/src/corelib/thread/qthread_p.h:325
#48 0x00007f6f00ba064e in QWidgetWindow::event (event=0x7ffd2195e990, this=0x55a2f6d32c40) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/kernel/qwidgetwindow.cpp:293
#49 QWidgetWindow::event (this=0x55a2f6d32c40, event=0x7ffd2195e990) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/kernel/qwidgetwindow.cpp:239
#50 0x00007f6f00b4611e in QApplicationPrivate::notify_helper (this=this@entry=0x55a2f6a50570, receiver=receiver@entry=0x55a2f6d32c40, e=e@entry=0x7ffd2195e990) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/kernel/qapplication.cpp:3632
#51 0x00007f6f00b4c9a0 in QApplication::notify (this=0x7ffd2195ed80, receiver=0x55a2f6d32c40, e=0x7ffd2195e990) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/kernel/qapplication.cpp:3156
#52 0x00007f6efff9aba9 in QCoreApplication::notifyInternal2 (receiver=0x55a2f6d32c40, event=0x7ffd2195e990) at ../../include/QtCore/5.15.2/QtCore/private/../../../../../../../../src/Qt5/qtbase/src/corelib/thread/qthread_p.h:325
#53 0x00007f6f004902a3 in QGuiApplicationPrivate::processKeyEvent (e=0x55a2f76db1c0) at /home/leszek/kde/src/Qt5/qtbase/src/gui/kernel/qguiapplication.cpp:2414
#54 0x00007f6f00494b55 in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x55a2f76db1c0) at /home/leszek/kde/src/Qt5/qtbase/src/gui/kernel/qguiapplication.cpp:2008
#55 0x00007f6f0047017b in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at /home/leszek/kde/src/Qt5/qtbase/src/gui/kernel/qwindowsysteminterface.cpp:1169
#56 0x00007f6ef994b870 in userEventSourceDispatch (source=<optimized out>) at /home/leszek/kde/src/Qt5/qtbase/src/platformsupport/eventdispatchers/qeventdispatcher_glib.cpp:74
#57 0x00007f6efbf7df2e in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#58 0x00007f6efbf7e1c8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#59 0x00007f6efbf7e25c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#60 0x00007f6efffee354 in QEventDispatcherGlib::processEvents (this=0x55a2f6aeda00, flags=...) at /home/leszek/kde/src/Qt5/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:423
#61 0x00007f6efff99853 in QEventLoop::exec (this=this@entry=0x7ffd2195ec70, flags=..., flags@entry=...) at ../../include/QtCore/../../../../../src/Qt5/qtbase/src/corelib/global/qflags.h:141
#62 0x00007f6efffa16cc in QCoreApplication::exec () at ../../include/QtCore/../../../../../src/Qt5/qtbase/src/corelib/global/qflags.h:121
#63 0x00007f6f0288117f in kdemain (argc=1, argv=0x7ffd2195f3b8) at /home/leszek/kde/src/dolphin/src/main.cpp:204
#64 0x000055a2f555b177 in main (argc=1, argv=0x7ffd2195f3b8) at /home/leszek/kde/build/dolphin/src/dolphin_dummy.cpp:3
[Inferior 1 (process 8996) detached]
Comment 1 Ahmad Samir 2020-10-28 20:20:55 UTC 
This possibly has already been fixed by https://invent.kde.org/system/dolphin/-/commit/2448f88c5f42d7a2040fcf3bcd3c5f2a2f62cd03
Comment 2 Leszek Lesner 2020-10-28 21:02:33 UTC 
You are right. After your notice I did a fresh recompile of dolphin and it seems not to crash. Thanks for taking the time to look into it.
Comment 3 Leszek Lesner 2020-10-30 01:26:16 UTC 
Apparently not really fixed. Had it fixed for the other it failed before but now I have this issue again in a completely different folder. Here is the debug output: 


Application: Dolphin (dolphin), signal: Aborted
Content of s_kcrashErrorMessage: (null)
[KCrash Handler]
#5  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#6  0x00007fd0fb694535 in __GI_abort () at abort.c:79
#7  0x00007fd0fbc4ca05 in qt_message_fatal (context=..., message=<synthetic pointer>...) at /home/leszek/kde/src/Qt5/qtbase/src/corelib/global/qlogging.cpp:1914
#8  QMessageLogger::fatal (this=this@entry=0x7ffc16e66e80, msg=msg@entry=0x7fd0fbf1dea0 "ASSERT: \"%s\" in file %s, line %d") at /home/leszek/kde/src/Qt5/qtbase/src/corelib/global/qlogging.cpp:893
#9  0x00007fd0fbc4bf23 in qt_assert (assertion=<optimized out>, file=<optimized out>, line=<optimized out>) at ../../include/QtCore/../../../../../src/Qt5/qtbase/src/corelib/global/qlogging.h:90
#10 0x00007fd0fe5ccdd2 in KItemListView::slotItemsRemoved (this=0x55cdc6621d80, itemRanges=...) at /home/leszek/kde/src/dolphin/src/kitemviews/kitemlistview.cpp:1199
#11 0x00007fd0fe581bcb in KFileItemListView::slotItemsRemoved (this=0x55cdc6621d80, itemRanges=...) at /home/leszek/kde/src/dolphin/src/kitemviews/kfileitemlistview.cpp:309
#12 0x00007fd0fe5dbe7e in QtPrivate::FunctorCall<QtPrivate::IndexesList<0>, QtPrivate::List<KItemRangeList const&>, void, void (KItemListView::*)(KItemRangeList const&)>::call (f=&virtual table offset 536, o=0x55cdc6621d80, arg=0x7ffc16e67190) at /home/leszek/kde/qt5/include/QtCore/qobjectdefs_impl.h:152
#13 0x00007fd0fe5db16a in QtPrivate::FunctionPointer<void (KItemListView::*)(KItemRangeList const&)>::call<QtPrivate::List<KItemRangeList const&>, void> (f=&virtual table offset 536, o=0x55cdc6621d80, arg=0x7ffc16e67190) at /home/leszek/kde/qt5/include/QtCore/qobjectdefs_impl.h:185
#14 0x00007fd0fe5da0db in QtPrivate::QSlotObject<void (KItemListView::*)(KItemRangeList const&), QtPrivate::List<KItemRangeList const&>, void>::impl (which=1, this_=0x55cdc661d770, r=0x55cdc6621d80, a=0x7ffc16e67190, ret=0x0) at /home/leszek/kde/qt5/include/QtCore/qobjectdefs_impl.h:418
#15 0x00007fd0fbe7b66c in QtPrivate::QSlotObjectBase::call (a=0x7ffc16e67190, r=0x55cdc6621d80, this=0x55cdc661d770) at ../../include/QtCore/../../../../../src/Qt5/qtbase/src/corelib/kernel/qobjectdefs_impl.h:398
#16 doActivate<false> (sender=0x55cdc65a8870, signal_index=4, argv=0x7ffc16e67190) at /home/leszek/kde/src/Qt5/qtbase/src/corelib/kernel/qobject.cpp:3886
#17 0x00007fd0fe572e0b in KItemModelBase::itemsRemoved (this=0x55cdc65a8870, _t1=...) at /home/leszek/kde/build/dolphin/src/dolphinprivate_autogen/Z3MQH7AOBD/moc_kitemmodelbase.cpp:253
#18 0x00007fd0fe58c3e4 in KFileItemModel::removeItems (this=0x55cdc65a8870, itemRanges=..., behavior=KFileItemModel::KeepItemData) at /home/leszek/kde/src/dolphin/src/kitemviews/kfileitemmodel.cpp:1317
#19 0x00007fd0fe589e10 in KFileItemModel::applyFilters (this=0x55cdc65a8870) at /home/leszek/kde/src/dolphin/src/kitemviews/kfileitemmodel.cpp:704
#20 0x00007fd0fe589bae in KFileItemModel::setNameFilter (this=0x55cdc65a8870, nameFilter=...) at /home/leszek/kde/src/dolphin/src/kitemviews/kfileitemmodel.cpp:658
#21 0x00007fd0fe61961d in DolphinView::setNameFilter (this=0x55cdc62267d0, nameFilter=...) at /home/leszek/kde/src/dolphin/src/views/dolphinview.cpp:484
#22 0x00007fd0fe75831c in DolphinViewContainer::setNameFilter (this=0x55cdc6577200, nameFilter=...) at /home/leszek/kde/src/dolphin/src/dolphinviewcontainer.cpp:667
#23 0x00007fd0fe75c10d in QtPrivate::FunctorCall<QtPrivate::IndexesList<0>, QtPrivate::List<QString const&>, void, void (DolphinViewContainer::*)(QString const&)>::call (f=(void (DolphinViewContainer::*)(class DolphinViewContainer * const, const class QString &)) 0x7fd0fe7582e0 <DolphinViewContainer::setNameFilter(QString const&)>, o=0x55cdc6577200, arg=0x7ffc16e67510) at /home/leszek/kde/qt5/include/QtCore/qobjectdefs_impl.h:152
#24 0x00007fd0fe75bc2e in QtPrivate::FunctionPointer<void (DolphinViewContainer::*)(QString const&)>::call<QtPrivate::List<QString const&>, void> (f=(void (DolphinViewContainer::*)(class DolphinViewContainer * const, const class QString &)) 0x7fd0fe7582e0 <DolphinViewContainer::setNameFilter(QString const&)>, o=0x55cdc6577200, arg=0x7ffc16e67510) at /home/leszek/kde/qt5/include/QtCore/qobjectdefs_impl.h:185
#25 0x00007fd0fe75b1e7 in QtPrivate::QSlotObject<void (DolphinViewContainer::*)(QString const&), QtPrivate::List<QString const&>, void>::impl (which=1, this_=0x55cdc6692950, r=0x55cdc6577200, a=0x7ffc16e67510, ret=0x0) at /home/leszek/kde/qt5/include/QtCore/qobjectdefs_impl.h:418
#26 0x00007fd0fbe7b66c in QtPrivate::QSlotObjectBase::call (a=0x7ffc16e67510, r=0x55cdc6577200, this=0x55cdc6692950) at ../../include/QtCore/../../../../../src/Qt5/qtbase/src/corelib/kernel/qobjectdefs_impl.h:398
#27 doActivate<false> (sender=0x55cdc65aca60, signal_index=7, argv=0x7ffc16e67510) at /home/leszek/kde/src/Qt5/qtbase/src/corelib/kernel/qobject.cpp:3886
#28 0x00007fd0fe7b8d09 in FilterBar::filterChanged (this=0x55cdc65aca60, _t1=...) at /home/leszek/kde/build/dolphin/src/dolphinstatic_autogen/A7DZ2KMSNA/moc_filterbar.cpp:174
#29 0x00007fd0fe768adf in QtPrivate::FunctorCall<QtPrivate::IndexesList<0>, QtPrivate::List<QString const&>, void, void (FilterBar::*)(QString const&)>::call (f=(void (FilterBar::*)(class FilterBar * const, const class QString &)) 0x7fd0fe7b8cba <FilterBar::filterChanged(QString const&)>, o=0x55cdc65aca60, arg=0x7ffc16e676c0) at /home/leszek/kde/qt5/include/QtCore/qobjectdefs_impl.h:152
#30 0x00007fd0fe7689ca in QtPrivate::FunctionPointer<void (FilterBar::*)(QString const&)>::call<QtPrivate::List<QString const&>, void> (f=(void (FilterBar::*)(class FilterBar * const, const class QString &)) 0x7fd0fe7b8cba <FilterBar::filterChanged(QString const&)>, o=0x55cdc65aca60, arg=0x7ffc16e676c0) at /home/leszek/kde/qt5/include/QtCore/qobjectdefs_impl.h:185
#31 0x00007fd0fe7688ef in QtPrivate::QSlotObject<void (FilterBar::*)(QString const&), QtPrivate::List<QString const&>, void>::impl (which=1, this_=0x55cdc6692810, r=0x55cdc65aca60, a=0x7ffc16e676c0, ret=0x0) at /home/leszek/kde/qt5/include/QtCore/qobjectdefs_impl.h:418
#32 0x00007fd0fbe7b66c in QtPrivate::QSlotObjectBase::call (a=0x7ffc16e676c0, r=0x55cdc65aca60, this=0x55cdc6692810) at ../../include/QtCore/../../../../../src/Qt5/qtbase/src/corelib/kernel/qobjectdefs_impl.h:398
#33 doActivate<false> (sender=0x55cdc65ab890, signal_index=7, argv=0x7ffc16e676c0) at /home/leszek/kde/src/Qt5/qtbase/src/corelib/kernel/qobject.cpp:3886
#34 0x00007fd0fbe75982 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7fd0fcebdf80 <QLineEdit::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffc16e676c0) at /home/leszek/kde/src/Qt5/qtbase/src/corelib/kernel/qobject.cpp:3946
#35 0x00007fd0fcb26002 in QLineEdit::textChanged (this=<optimized out>, _t1=...) at .moc/moc_qlineedit.cpp:447
#36 0x00007fd0fcb2c209 in QLineEdit::qt_static_metacall (_o=0x55cdc65ab890, _c=<optimized out>, _id=<optimized out>, _a=0x7ffc16e67800) at .moc/moc_qlineedit.cpp:255
#37 0x00007fd0fbe7b69d in doActivate<false> (sender=0x55cdc65a2700, signal_index=6, argv=0x7ffc16e67800) at ../../include/QtCore/../../../../../src/Qt5/qtbase/src/corelib/kernel/qobjectdefs_impl.h:395
#38 0x00007fd0fbe75982 in QMetaObject::activate (sender=sender@entry=0x55cdc65a2700, m=m@entry=0x7fd0fcebe040 <QWidgetLineControl::staticMetaObject>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7ffc16e67800) at /home/leszek/kde/src/Qt5/qtbase/src/corelib/kernel/qobject.cpp:3946
#39 0x00007fd0fcb2cdd5 in QWidgetLineControl::textChanged (this=this@entry=0x55cdc65a2700, _t1=...) at .moc/moc_qwidgetlinecontrol_p.cpp:273
#40 0x00007fd0fcb2fe61 in QWidgetLineControl::finishChange (this=0x55cdc65a2700, validateFromState=<optimized out>, update=<optimized out>, edited=<optimized out>) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/widgets/qwidgetlinecontrol.cpp:736
#41 0x00007fd0fcb32ef9 in QWidgetLineControl::processKeyEvent (this=0x55cdc65a2700, event=event@entry=0x7ffc16e67e40) at ../../include/QtCore/../../../../../src/Qt5/qtbase/src/corelib/tools/qrefcount.h:60
#42 0x00007fd0fcb260aa in QLineEdit::keyPressEvent (this=0x55cdc65ab890, event=0x7ffc16e67e40) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/widgets/qlineedit.cpp:1794
#43 0x00007fd0fca31b07 in QWidget::event (this=this@entry=0x55cdc65ab890, event=event@entry=0x7ffc16e67e40) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/kernel/qwidget.cpp:8678
#44 0x00007fd0fcb2bb4a in QLineEdit::event (this=0x55cdc65ab890, e=0x7ffc16e67e40) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/widgets/qlineedit.cpp:1531
#45 0x00007fd0fc9f411e in QApplicationPrivate::notify_helper (this=this@entry=0x55cdc60fa570, receiver=receiver@entry=0x55cdc65ab890, e=e@entry=0x7ffc16e67e40) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/kernel/qapplication.cpp:3632
#46 0x00007fd0fc9fb251 in QApplication::notify (this=<optimized out>, receiver=0x55cdc65ab890, e=0x7ffc16e67e40) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/kernel/qapplication.cpp:2994
#47 0x00007fd0fbe48ba9 in QCoreApplication::notifyInternal2 (receiver=0x55cdc65ab890, event=0x7ffc16e67e40) at ../../include/QtCore/5.15.2/QtCore/private/../../../../../../../../src/Qt5/qtbase/src/corelib/thread/qthread_p.h:325
#48 0x00007fd0fca4e64e in QWidgetWindow::event (event=0x7ffc16e67e40, this=0x55cdc63d1c00) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/kernel/qwidgetwindow.cpp:293
#49 QWidgetWindow::event (this=0x55cdc63d1c00, event=0x7ffc16e67e40) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/kernel/qwidgetwindow.cpp:239
#50 0x00007fd0fc9f411e in QApplicationPrivate::notify_helper (this=this@entry=0x55cdc60fa570, receiver=receiver@entry=0x55cdc63d1c00, e=e@entry=0x7ffc16e67e40) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/kernel/qapplication.cpp:3632
#51 0x00007fd0fc9fa9a0 in QApplication::notify (this=0x7ffc16e68230, receiver=0x55cdc63d1c00, e=0x7ffc16e67e40) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/kernel/qapplication.cpp:3156
#52 0x00007fd0fbe48ba9 in QCoreApplication::notifyInternal2 (receiver=0x55cdc63d1c00, event=0x7ffc16e67e40) at ../../include/QtCore/5.15.2/QtCore/private/../../../../../../../../src/Qt5/qtbase/src/corelib/thread/qthread_p.h:325
#53 0x00007fd0fc33e2a3 in QGuiApplicationPrivate::processKeyEvent (e=0x55cdc6b30b30) at /home/leszek/kde/src/Qt5/qtbase/src/gui/kernel/qguiapplication.cpp:2414
#54 0x00007fd0fc342b55 in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x55cdc6b30b30) at /home/leszek/kde/src/Qt5/qtbase/src/gui/kernel/qguiapplication.cpp:2008
#55 0x00007fd0fc31e17b in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at /home/leszek/kde/src/Qt5/qtbase/src/gui/kernel/qwindowsysteminterface.cpp:1169
#56 0x00007fd0f57f9870 in userEventSourceDispatch (source=<optimized out>) at /home/leszek/kde/src/Qt5/qtbase/src/platformsupport/eventdispatchers/qeventdispatcher_glib.cpp:74
#57 0x00007fd0f7e2bf2e in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#58 0x00007fd0f7e2c1c8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#59 0x00007fd0f7e2c25c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#60 0x00007fd0fbe9c354 in QEventDispatcherGlib::processEvents (this=0x55cdc61977d0, flags=...) at /home/leszek/kde/src/Qt5/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:423
#61 0x00007fd0fbe47853 in QEventLoop::exec (this=this@entry=0x7ffc16e68120, flags=..., flags@entry=...) at ../../include/QtCore/../../../../../src/Qt5/qtbase/src/corelib/global/qflags.h:141
#62 0x00007fd0fbe4f6cc in QCoreApplication::exec () at ../../include/QtCore/../../../../../src/Qt5/qtbase/src/corelib/global/qflags.h:121
#63 0x00007fd0fe72f17f in kdemain (argc=1, argv=0x7ffc16e68868) at /home/leszek/kde/src/dolphin/src/main.cpp:204
#64 0x000055cdc50ba177 in main (argc=1, argv=0x7ffc16e68868) at /home/leszek/kde/build/dolphin/src/dolphin_dummy.cpp:3
[Inferior 1 (process 87732) detached]
Comment 4 Leszek Lesner 2020-10-30 02:23:31 UTC 
I searched a bit more and found the commit that breaks it for me: 

https://invent.kde.org/system/dolphin/-/commit/a24327cd50ef17b953ecb908d260b73460158107
Comment 5 Alexander Lohnau 2020-10-30 07:11:04 UTC 
What have you done to trigger the second crash?
Comment 6 Leszek Lesner 2020-10-30 07:14:05 UTC 
Used the filter function in my plasma master installation path plasmoids folder  to search for "sys" as soon as I type in the y it crashes
Comment 7 Alexander Lohnau 2020-10-30 07:18:22 UTC 
Hmm, it works for me. Are you sure you have the latest build + your build prefix applied when running dolphin (Sorry for asking, just want to be sure).
Comment 8 Leszek Lesner 2020-10-30 07:36:31 UTC 
Yes. Master build of dolphin and it is the version running
Comment 9 Ismael Asensio 2020-11-03 19:51:57 UTC 
*** Bug 428546 has been marked as a duplicate of this bug. ***
Comment 10 Ismael Asensio 2020-11-03 19:52:14 UTC 
*** Bug 428532 has been marked as a duplicate of this bug. ***
Comment 11 Ismael Asensio 2020-11-03 19:59:18 UTC 
Created attachment 133000 [details]
New crash information added by DrKonqi

dolphin (20.11.70) using Qt 5.15.2

- What I was doing when the application crashed:

I can reproduce it on master:
- on a folder with enough content (I tried ~/kde/src)
- typing in the filter bar several letters, then deleting some of them and continuing typing
- sometimes it requires more attemps than others but it'll eventually crash after playing a little bit with it
- it happens with either preview enabled or disabled

-- Backtrace (Reduced):
#5  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:49
#6  0x00007f8adb62d864 in __GI_abort () at abort.c:79
#7  0x00007f8ad8c59c99 in qt_message_fatal (message=<synthetic pointer>..., context=...) at /home/isma/kde/src/Qt5/qtbase/src/corelib/global/qlogging.cpp:1914
#8  QMessageLogger::fatal (this=this@entry=0x7ffd2993f8a8, msg=msg@entry=0x7f8ad8f64ea0 "ASSERT: \"%s\" in file %s, line %d") at /home/isma/kde/src/Qt5/qtbase/src/corelib/global/qlogging.cpp:893
#9  0x00007f8ad8c59058 in qt_assert (assertion=<optimized out>, file=<optimized out>, line=<optimized out>) at ../../include/QtCore/../../../../../src/Qt5/qtbase/src/corelib/global/qlogging.h:90
Comment 12 Justin Zobel 2020-11-04 23:20:45 UTC 
Confirmed by second user.
Comment 13 Tony 2020-11-05 19:06:04 UTC 
(In reply to Ahmad Samir from comment #1)
> This possibly has already been fixed by
> https://invent.kde.org/system/dolphin/-/commit/
> 2448f88c5f42d7a2040fcf3bcd3c5f2a2f62cd03

Please retest. This commint or one of the few that fallowed it seem to have fixed this one, at least it working correctly for me already.
Comment 14 Ahmad Samir 2020-11-05 19:30:36 UTC 
FTR, I can reproduce this bug, it's intermittent, and takes a bit of fast typing/backspace'ing in the filter bar to occur...
Comment 15 Leszek Lesner 2020-11-05 22:12:35 UTC 
Can still confirm that typing to quickly in filter bar sometimes crashes dolphin. Here my backtrace: 

Application: Dolphin (dolphin), signal: Aborted
Content of s_kcrashErrorMessage: (null)
[KCrash Handler]
#5  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#6  0x00007faa07387535 in __GI_abort () at abort.c:79
#7  0x00007faa0793fa05 in qt_message_fatal (context=..., message=<synthetic pointer>...) at /home/leszek/kde/src/Qt5/qtbase/src/corelib/global/qlogging.cpp:1914
#8  QMessageLogger::fatal (this=this@entry=0x7ffdfc211140, msg=msg@entry=0x7faa07c10ea0 "ASSERT: \"%s\" in file %s, line %d") at /home/leszek/kde/src/Qt5/qtbase/src/corelib/global/qlogging.cpp:893
#9  0x00007faa0793ef23 in qt_assert (assertion=<optimized out>, file=<optimized out>, line=<optimized out>) at ../../include/QtCore/../../../../../src/Qt5/qtbase/src/corelib/global/qlogging.h:90
#10 0x00007faa0a2c032c in KItemListView::slotItemsRemoved (this=0x5595aebfc950, itemRanges=...) at /home/leszek/kde/src/dolphin/src/kitemviews/kitemlistview.cpp:1199
#11 0x00007faa0a274eaf in KFileItemListView::slotItemsRemoved (this=0x5595aebfc950, itemRanges=...) at /home/leszek/kde/src/dolphin/src/kitemviews/kfileitemlistview.cpp:339
#12 0x00007faa0a2cf3d6 in QtPrivate::FunctorCall<QtPrivate::IndexesList<0>, QtPrivate::List<KItemRangeList const&>, void, void (KItemListView::*)(KItemRangeList const&)>::call (f=&virtual table offset 536, o=0x5595aebfc950, arg=0x7ffdfc211450) at /home/leszek/kde/qt5/include/QtCore/qobjectdefs_impl.h:152
#13 0x00007faa0a2ce6c2 in QtPrivate::FunctionPointer<void (KItemListView::*)(KItemRangeList const&)>::call<QtPrivate::List<KItemRangeList const&>, void> (f=&virtual table offset 536, o=0x5595aebfc950, arg=0x7ffdfc211450) at /home/leszek/kde/qt5/include/QtCore/qobjectdefs_impl.h:185
#14 0x00007faa0a2cd633 in QtPrivate::QSlotObject<void (KItemListView::*)(KItemRangeList const&), QtPrivate::List<KItemRangeList const&>, void>::impl (which=1, this_=0x5595aec0ff30, r=0x5595aebfc950, a=0x7ffdfc211450, ret=0x0) at /home/leszek/kde/qt5/include/QtCore/qobjectdefs_impl.h:418
#15 0x00007faa07b6e66c in QtPrivate::QSlotObjectBase::call (a=0x7ffdfc211450, r=0x5595aebfc950, this=0x5595aec0ff30) at ../../include/QtCore/../../../../../src/Qt5/qtbase/src/corelib/kernel/qobjectdefs_impl.h:398
#16 doActivate<false> (sender=0x5595aec7e050, signal_index=4, argv=0x7ffdfc211450) at /home/leszek/kde/src/Qt5/qtbase/src/corelib/kernel/qobject.cpp:3886
#17 0x00007faa0a265e8b in KItemModelBase::itemsRemoved (this=0x5595aec7e050, _t1=...) at /home/leszek/kde/build/dolphin/src/dolphinprivate_autogen/Z3MQH7AOBD/moc_kitemmodelbase.cpp:253
#18 0x00007faa0a27f6fa in KFileItemModel::removeItems (this=0x5595aec7e050, itemRanges=..., behavior=KFileItemModel::KeepItemData) at /home/leszek/kde/src/dolphin/src/kitemviews/kfileitemmodel.cpp:1319
#19 0x00007faa0a27d126 in KFileItemModel::applyFilters (this=0x5595aec7e050) at /home/leszek/kde/src/dolphin/src/kitemviews/kfileitemmodel.cpp:706
#20 0x00007faa0a27cec4 in KFileItemModel::setNameFilter (this=0x5595aec7e050, nameFilter=...) at /home/leszek/kde/src/dolphin/src/kitemviews/kfileitemmodel.cpp:660
#21 0x00007faa0a30ccff in DolphinView::setNameFilter (this=0x5595ae781cb0, nameFilter=...) at /home/leszek/kde/src/dolphin/src/views/dolphinview.cpp:484
#22 0x00007faa0a44eb78 in DolphinViewContainer::setNameFilter (this=0x5595aec3a4e0, nameFilter=...) at /home/leszek/kde/src/dolphin/src/dolphinviewcontainer.cpp:667
#23 0x00007faa0a452969 in QtPrivate::FunctorCall<QtPrivate::IndexesList<0>, QtPrivate::List<QString const&>, void, void (DolphinViewContainer::*)(QString const&)>::call (f=(void (DolphinViewContainer::*)(class DolphinViewContainer * const, const class QString &)) 0x7faa0a44eb3c <DolphinViewContainer::setNameFilter(QString const&)>, o=0x5595aec3a4e0, arg=0x7ffdfc2117d0) at /home/leszek/kde/qt5/include/QtCore/qobjectdefs_impl.h:152
#24 0x00007faa0a45248a in QtPrivate::FunctionPointer<void (DolphinViewContainer::*)(QString const&)>::call<QtPrivate::List<QString const&>, void> (f=(void (DolphinViewContainer::*)(class DolphinViewContainer * const, const class QString &)) 0x7faa0a44eb3c <DolphinViewContainer::setNameFilter(QString const&)>, o=0x5595aec3a4e0, arg=0x7ffdfc2117d0) at /home/leszek/kde/qt5/include/QtCore/qobjectdefs_impl.h:185
#25 0x00007faa0a451a43 in QtPrivate::QSlotObject<void (DolphinViewContainer::*)(QString const&), QtPrivate::List<QString const&>, void>::impl (which=1, this_=0x5595aebc4320, r=0x5595aec3a4e0, a=0x7ffdfc2117d0, ret=0x0) at /home/leszek/kde/qt5/include/QtCore/qobjectdefs_impl.h:418
#26 0x00007faa07b6e66c in QtPrivate::QSlotObjectBase::call (a=0x7ffdfc2117d0, r=0x5595aec3a4e0, this=0x5595aebc4320) at ../../include/QtCore/../../../../../src/Qt5/qtbase/src/corelib/kernel/qobjectdefs_impl.h:398
#27 doActivate<false> (sender=0x5595aeb984a0, signal_index=7, argv=0x7ffdfc2117d0) at /home/leszek/kde/src/Qt5/qtbase/src/corelib/kernel/qobject.cpp:3886
#28 0x00007faa0a4b255b in FilterBar::filterChanged (this=0x5595aeb984a0, _t1=...) at /home/leszek/kde/build/dolphin/src/dolphinstatic_autogen/A7DZ2KMSNA/moc_filterbar.cpp:174
#29 0x00007faa0a45f33b in QtPrivate::FunctorCall<QtPrivate::IndexesList<0>, QtPrivate::List<QString const&>, void, void (FilterBar::*)(QString const&)>::call (f=(void (FilterBar::*)(class FilterBar * const, const class QString &)) 0x7faa0a4b250c <FilterBar::filterChanged(QString const&)>, o=0x5595aeb984a0, arg=0x7ffdfc211980) at /home/leszek/kde/qt5/include/QtCore/qobjectdefs_impl.h:152
#30 0x00007faa0a45f226 in QtPrivate::FunctionPointer<void (FilterBar::*)(QString const&)>::call<QtPrivate::List<QString const&>, void> (f=(void (FilterBar::*)(class FilterBar * const, const class QString &)) 0x7faa0a4b250c <FilterBar::filterChanged(QString const&)>, o=0x5595aeb984a0, arg=0x7ffdfc211980) at /home/leszek/kde/qt5/include/QtCore/qobjectdefs_impl.h:185
#31 0x00007faa0a45f14b in QtPrivate::QSlotObject<void (FilterBar::*)(QString const&), QtPrivate::List<QString const&>, void>::impl (which=1, this_=0x5595aebc41e0, r=0x5595aeb984a0, a=0x7ffdfc211980, ret=0x0) at /home/leszek/kde/qt5/include/QtCore/qobjectdefs_impl.h:418
#32 0x00007faa07b6e66c in QtPrivate::QSlotObjectBase::call (a=0x7ffdfc211980, r=0x5595aeb984a0, this=0x5595aebc41e0) at ../../include/QtCore/../../../../../src/Qt5/qtbase/src/corelib/kernel/qobjectdefs_impl.h:398
#33 doActivate<false> (sender=0x5595aec7f9a0, signal_index=7, argv=0x7ffdfc211980) at /home/leszek/kde/src/Qt5/qtbase/src/corelib/kernel/qobject.cpp:3886
#34 0x00007faa07b68982 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7faa08bb0f80 <QLineEdit::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffdfc211980) at /home/leszek/kde/src/Qt5/qtbase/src/corelib/kernel/qobject.cpp:3946
#35 0x00007faa08819002 in QLineEdit::textChanged (this=<optimized out>, _t1=...) at .moc/moc_qlineedit.cpp:447
#36 0x00007faa0881f209 in QLineEdit::qt_static_metacall (_o=0x5595aec7f9a0, _c=<optimized out>, _id=<optimized out>, _a=0x7ffdfc211ac0) at .moc/moc_qlineedit.cpp:255
#37 0x00007faa07b6e69d in doActivate<false> (sender=0x5595aeb586e0, signal_index=6, argv=0x7ffdfc211ac0) at ../../include/QtCore/../../../../../src/Qt5/qtbase/src/corelib/kernel/qobjectdefs_impl.h:395
#38 0x00007faa07b68982 in QMetaObject::activate (sender=sender@entry=0x5595aeb586e0, m=m@entry=0x7faa08bb1040 <QWidgetLineControl::staticMetaObject>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7ffdfc211ac0) at /home/leszek/kde/src/Qt5/qtbase/src/corelib/kernel/qobject.cpp:3946
#39 0x00007faa0881fdd5 in QWidgetLineControl::textChanged (this=this@entry=0x5595aeb586e0, _t1=...) at .moc/moc_qwidgetlinecontrol_p.cpp:273
#40 0x00007faa08822e61 in QWidgetLineControl::finishChange (this=0x5595aeb586e0, validateFromState=<optimized out>, update=<optimized out>, edited=<optimized out>) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/widgets/qwidgetlinecontrol.cpp:736
#41 0x00007faa08825ef9 in QWidgetLineControl::processKeyEvent (this=0x5595aeb586e0, event=event@entry=0x7ffdfc212100) at ../../include/QtCore/../../../../../src/Qt5/qtbase/src/corelib/tools/qrefcount.h:60
#42 0x00007faa088190aa in QLineEdit::keyPressEvent (this=0x5595aec7f9a0, event=0x7ffdfc212100) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/widgets/qlineedit.cpp:1794
#43 0x00007faa08724b07 in QWidget::event (this=this@entry=0x5595aec7f9a0, event=event@entry=0x7ffdfc212100) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/kernel/qwidget.cpp:8678
#44 0x00007faa0881eb4a in QLineEdit::event (this=0x5595aec7f9a0, e=0x7ffdfc212100) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/widgets/qlineedit.cpp:1531
#45 0x00007faa086e711e in QApplicationPrivate::notify_helper (this=this@entry=0x5595ae6e6570, receiver=receiver@entry=0x5595aec7f9a0, e=e@entry=0x7ffdfc212100) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/kernel/qapplication.cpp:3632
#46 0x00007faa086ee251 in QApplication::notify (this=<optimized out>, receiver=0x5595aec7f9a0, e=0x7ffdfc212100) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/kernel/qapplication.cpp:2994
#47 0x00007faa07b3bba9 in QCoreApplication::notifyInternal2 (receiver=0x5595aec7f9a0, event=0x7ffdfc212100) at ../../include/QtCore/5.15.2/QtCore/private/../../../../../../../../src/Qt5/qtbase/src/corelib/thread/qthread_p.h:325
#48 0x00007faa0874164e in QWidgetWindow::event (event=0x7ffdfc212100, this=0x5595ae9c8e50) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/kernel/qwidgetwindow.cpp:293
#49 QWidgetWindow::event (this=0x5595ae9c8e50, event=0x7ffdfc212100) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/kernel/qwidgetwindow.cpp:239
#50 0x00007faa086e711e in QApplicationPrivate::notify_helper (this=this@entry=0x5595ae6e6570, receiver=receiver@entry=0x5595ae9c8e50, e=e@entry=0x7ffdfc212100) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/kernel/qapplication.cpp:3632
#51 0x00007faa086ed9a0 in QApplication::notify (this=0x7ffdfc2124f0, receiver=0x5595ae9c8e50, e=0x7ffdfc212100) at /home/leszek/kde/src/Qt5/qtbase/src/widgets/kernel/qapplication.cpp:3156
#52 0x00007faa07b3bba9 in QCoreApplication::notifyInternal2 (receiver=0x5595ae9c8e50, event=0x7ffdfc212100) at ../../include/QtCore/5.15.2/QtCore/private/../../../../../../../../src/Qt5/qtbase/src/corelib/thread/qthread_p.h:325
#53 0x00007faa080312a3 in QGuiApplicationPrivate::processKeyEvent (e=0x5595aefdf010) at /home/leszek/kde/src/Qt5/qtbase/src/gui/kernel/qguiapplication.cpp:2414
#54 0x00007faa08035b55 in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x5595aefdf010) at /home/leszek/kde/src/Qt5/qtbase/src/gui/kernel/qguiapplication.cpp:2008
#55 0x00007faa0801117b in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at /home/leszek/kde/src/Qt5/qtbase/src/gui/kernel/qwindowsysteminterface.cpp:1169
#56 0x00007faa0145a870 in userEventSourceDispatch (source=<optimized out>) at /home/leszek/kde/src/Qt5/qtbase/src/platformsupport/eventdispatchers/qeventdispatcher_glib.cpp:74
#57 0x00007faa03a8cf2e in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#58 0x00007faa03a8d1c8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#59 0x00007faa03a8d25c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#60 0x00007faa07b8f354 in QEventDispatcherGlib::processEvents (this=0x5595ae712fa0, flags=...) at /home/leszek/kde/src/Qt5/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:423
#61 0x00007faa07b3a853 in QEventLoop::exec (this=this@entry=0x7ffdfc2123e0, flags=..., flags@entry=...) at ../../include/QtCore/../../../../../src/Qt5/qtbase/src/corelib/global/qflags.h:141
#62 0x00007faa07b426cc in QCoreApplication::exec () at ../../include/QtCore/../../../../../src/Qt5/qtbase/src/corelib/global/qflags.h:121
#63 0x00007faa0a425609 in kdemain (argc=1, argv=0x7ffdfc212b68) at /home/leszek/kde/src/dolphin/src/main.cpp:222
#64 0x00005595ac6cb177 in main (argc=1, argv=0x7ffdfc212b68) at /home/leszek/kde/build/dolphin/src/dolphin_dummy.cpp:3
[Inferior 1 (process 201933) detached]
Comment 16 Elvis Angelaccio 2020-11-05 23:32:05 UTC 
*** Bug 428252 has been marked as a duplicate of this bug. ***
Comment 17 Tony 2020-11-05 23:50:44 UTC 
(In reply to Ahmad Samir from comment #14)
> FTR, I can reproduce this bug, it's intermittent, and takes a bit of fast
> typing/backspace'ing in the filter bar to occur...

Ok, yes still present is harder to trigger now though. Before i just had to typed a single character/letter into the filter bar to trigger it.
Comment 18 Bug Janitor Service 2020-11-06 20:35:26 UTC 
A possibly relevant merge request was started @ https://invent.kde.org/system/dolphin/-/merge_requests/97
Comment 19 Elvis Angelaccio 2020-11-08 22:00:37 UTC 
Git commit ee4ab8ce699bd0fd10fe664e053eb6f26da94268 by Elvis Angelaccio, on behalf of Ismael Asensio.
Committed on 08/11/2020 at 21:59.
Pushed by elvisangelaccio into branch 'release/20.12'.

Iterate over a const copy list of containers

This effectively reverts the mutable iterations approach on
2448f88c5f42d7a2040fcf3bcd3c5f2a2f62cd03, and fix crashes
and ghost items when using the filter bar

M  +3    -3    src/kitemviews/kfileitemmodel.cpp
M  +3    -3    src/kitemviews/kfileitemmodelrolesupdater.cpp
M  +4    -4    src/kitemviews/kitemlistview.cpp

https://invent.kde.org/system/dolphin/commit/ee4ab8ce699bd0fd10fe664e053eb6f26da94268