Created attachment 184446 [details]
New crash information added by DrKonqi

DrKonqi auto-attaching complete backtrace.

Searchable backtrace


Thread 1 (Thread 0x7faca6b7cdc0 (LWP 3559)):
[KCrash Handler]
#5  0x00007facaf933a8b in QArrayDataPointer<QString>::QArrayDataPointer (this=0x7ffdc44cbb70, other=...) at /usr/include/qt6/QtCore/qarraydatapointer.h:38
#6  QList<QString>::QList (this=0x7ffdc44cbb70, this=<optimized out>) at /usr/include/qt6/QtCore/qlist.h:76
#7  KFilePlacesModel::supportedSchemes (this=0x56191bd1e950) at /usr/src/debug/kf6-kio-6.17.0-1.fc42.x86_64/src/filewidgets/kfileplacesmodel.cpp:1536
#8  0x00007facaf915985 in KFileWidget::slotOk (this=<optimized out>) at /usr/include/c++/15/bits/unique_ptr.h:193
#9  0x00007facac5657ba in QtPrivate::QSlotObjectBase::call (this=0x56191c044b10, r=0x56191c023d40, a=0x7ffdc44cbd50) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobjectdefs_impl.h:461
#10 doActivate<false> (sender=0x56191c053d40, signal_index=9, argv=argv@entry=0x7ffdc44cbd50) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobject.cpp:4146
#11 0x00007facac55c089 in QMetaObject::activate (sender=sender@entry=0x56191c053d40, m=m@entry=0x7facadfa7f20, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x7ffdc44cbd50) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobject.cpp:4206
#12 0x00007facad988dba in QMetaObject::activate<void, bool> (sender=0x56191c053d40, mo=0x7facadfa7f20, local_signal_index=2, ret=0x0) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobjectdefs.h:306
#13 QAbstractButton::clicked (this=this@entry=0x56191c053d40, _t1=<optimized out>) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/redhat-linux-build/src/widgets/Widgets_autogen/include/moc_qabstractbutton.cpp:252
#14 0x00007facad989043 in QAbstractButtonPrivate::emitClicked (this=0x56191be0f5c0) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/widgets/widgets/qabstractbutton.cpp:381
#15 0x00007facad98a743 in QAbstractButtonPrivate::click (this=0x56191be0f5c0) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/widgets/widgets/qabstractbutton.cpp:374
#16 0x00007facad98a96d in QAbstractButton::mouseReleaseEvent (this=0x56191c053d40, e=0x7ffdc44cc380) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/widgets/widgets/qabstractbutton.cpp:976
#17 0x00007facad8a6908 in QWidget::event (this=0x56191c053d40, event=0x7ffdc44cc380) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/widgets/kernel/qwidget.cpp:9367
#18 0x00007facad83d97f in QApplicationPrivate::notify_helper (this=this@entry=0x56191b990020, receiver=receiver@entry=0x56191c053d40, e=e@entry=0x7ffdc44cc380) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/widgets/kernel/qapplication.cpp:3303
#19 0x00007facad848593 in QApplication::notify (this=<optimized out>, receiver=<optimized out>, e=0x7ffdc44cc380) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/widgets/kernel/qapplication.cpp:2780
#20 0x00007facac4f9f38 in QCoreApplication::notifyInternal2 (receiver=0x56191c053d40, event=0x7ffdc44cc380) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qcoreapplication.cpp:1106
#21 0x00007facac4fa1ad in QCoreApplication::sendSpontaneousEvent (receiver=<optimized out>, event=<optimized out>) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qcoreapplication.cpp:1560
#22 0x00007facad846e29 in QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x56191c053d40, event=event@entry=0x7ffdc44cc380, alienWidget=<optimized out>, nativeWidget=nativeWidget@entry=0x56191c369710, buttonDown=buttonDown@entry=0x7facadfeb9d0 <qt_button_down>, lastMouseReceiver=..., spontaneous=true, onlyDispatchEnterLeave=false) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/widgets/kernel/qapplication.cpp:2361
#23 0x00007facad8bc3b5 in QWidgetWindow::handleMouseEvent (this=0x56191be2a100, event=0x7ffdc44cc610) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/widgets/kernel/qwidgetwindow.cpp:669
#24 0x00007facad8beeb3 in QWidgetWindow::event (this=<optimized out>, event=<optimized out>) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/widgets/kernel/qwidgetwindow.cpp:292
#25 0x00007facad83d97f in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x56191be2a100, e=0x7ffdc44cc610) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/widgets/kernel/qapplication.cpp:3303
#26 0x00007facac4f9f38 in QCoreApplication::notifyInternal2 (receiver=0x56191be2a100, event=0x7ffdc44cc610) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qcoreapplication.cpp:1106
#27 0x00007facac4fa1ad in QCoreApplication::sendSpontaneousEvent (receiver=<optimized out>, event=<optimized out>) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qcoreapplication.cpp:1560
#28 0x00007facaccf22a9 in QGuiApplicationPrivate::processMouseEvent (e=0x7fac8c002ff0) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/gui/kernel/qguiapplication.cpp:2476
#29 0x00007facacd5c76c in QWindowSystemInterface::sendWindowSystemEvents (flags=flags@entry=...) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/gui/kernel/qwindowsysteminterface.cpp:1113
#30 0x00007facacd5c988 in QWindowSystemInterface::flushWindowSystemEvents (flags=...) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/gui/kernel/qwindowsysteminterface.cpp:1082
#31 0x00007facac565c5a in doActivate<false> (sender=0x56191b992bd0, signal_index=4, argv=0x7ffdc44cc8b8, argv@entry=0x0) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobject.cpp:4158
#32 0x00007facac55c089 in QMetaObject::activate (sender=sender@entry=0x56191b992bd0, m=m@entry=0x7facacaa16e0 <QAbstractEventDispatcher::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x0) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobject.cpp:4206
#33 0x00007facac4f2cc7 in QAbstractEventDispatcher::awake (this=this@entry=0x56191b992bd0) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/redhat-linux-build/src/corelib/Core_autogen/include/moc_qabstracteventdispatcher.cpp:128
#34 0x00007facac80f9eb in QEventDispatcherGlib::processEvents (this=0x56191b992bd0, flags=...) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qeventdispatcher_glib.cpp:406
#35 0x00007facac507b03 in QEventLoop::exec (this=this@entry=0x7ffdc44cc9f0, flags=..., flags@entry=...) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/global/qflags.h:77
#36 0x00007facac503419 in QCoreApplication::exec () at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qcoreapplication.cpp:1449
#37 0x00007facaccddbad in QGuiApplication::exec () at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/gui/kernel/qguiapplication.cpp:1986
#38 0x00007facad83d8e9 in QApplication::exec () at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/widgets/kernel/qapplication.cpp:2570
#39 0x0000561907fd16fc in main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/xdg-desktop-portal-kde-6.4.4-1.fc42.x86_64/src/xdg-desktop-portal-kde.cpp:68

I'm not able to reproduce this in Plasma 6.4.4 or git-master

Testing steps:
1. Use Firefox to upload a file to my Nextcloud instance (6.4.4), or open it with Gwenview (git-master). These use the same File Open dialog
2. Select the file /tmp/signal-2025-08-25-161600.jpeg
3. Double click Open

I'll leave this open so others can try to reproduce.

Please attach the two files directly to this report. Resources on the Internet can disappear. You'll have to reduce the size of the recording.

*** Bug 508547 has been marked as a duplicate of this bug. ***

Things we know:
 - KFileWidget is alive for most of slotOk, otherwise we wouldn't get this far
 - m_model is dangling
- m_model has the same lifespan as KFileWidget

ergo KFileWidget is being deleted midway through slotOk.

That would be one of these:

        int res = statJob->exec();

this is obviously bad.

Worst case it needs a lazy QPointer guard of 'this' round every invocation.

Created attachment 184487 [details]
Video recording from cell phone of reproduction of bug

Created attachment 184488 [details]
the file used to reproduce, signal-2025-08-25-161600.jpeg

(In reply to TraceyC from comment #3)
> I'm not able to reproduce this in Plasma 6.4.4 or git-master
> 
> Testing steps:
> 1. Use Firefox to upload a file to my Nextcloud instance (6.4.4), or open it
> with Gwenview (git-master). These use the same File Open dialog
> 2. Select the file /tmp/signal-2025-08-25-161600.jpeg
> 3. Double click Open
> 
> I'll leave this open so others can try to reproduce.
> 
> Please attach the two files directly to this report. Resources on the
> Internet can disappear. You'll have to reduce the size of the recording.

it may specifically need to be flatpak without filesystem access. 

I didnt know i could attach files, so i will do that now.

I'm going to attach another drkonqui backtrace that i think may be related, i got a similar kde portals crash when selecting a save location for an image (in /tmp) for signal desktop. I cannot repro, but maybe the additional backtrace will be useful

Created attachment 184491 [details]
Portal crash when selecting save location in signal desktop flatpak

(In reply to jjj333.p.1325 from comment #10)
> Created attachment 184491 [details]
> Portal crash when selecting save location in signal desktop flatpak

That backtrace looks entirely different from the one originally reported. Can you please open a new bug report and attach that backtrace to it? Thanks.