Application: dolphin (20.12.2)

Qt Version: 5.15.2
Frameworks Version: 5.78.0
Operating System: Linux 5.10.0-6-amd64 x86_64
Windowing system: X11
Distribution: Debian GNU/Linux bullseye/sid

-- Information about the crash:
- What I was doing when the application crashed:
I was navigating inside a folder created by the docker instance of Cocalc.
This folder, I had to change permissions to acces from the user in the host.
This has been working since the begining 4 moths ago.
When I clicked a folder inside this Cocalc  project folder, Dolphin did not opened it and crashed.
Apparently, it happens at random.

-- Backtrace:
Application: Dolphin (dolphin), signal: Aborted

[KCrash Handler]
#4  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#5  0x00007ff2e87fd537 in __GI_abort () at abort.c:79
#6  0x00007ff2e8856768 in __libc_message (action=action@entry=do_abort, fmt=fmt@entry=0x7ff2e8964c24 "*** %s ***: terminated\n") at ../sysdeps/posix/libc_fatal.c:155
#7  0x00007ff2e88e5652 in __GI___fortify_fail (msg=msg@entry=0x7ff2e8964c0c "stack smashing detected") at fortify_fail.c:26
#8  0x00007ff2e88e5630 in __stack_chk_fail () at stack_chk_fail.c:24
#9  0x00007ff2e872800b in KFileItemModel::index(QUrl const&) const () from /lib/x86_64-linux-gnu/libdolphinprivate.so.5
#10 0x00007ff2e87280a0 in KFileItemModel::index(KFileItem const&) const () from /lib/x86_64-linux-gnu/libdolphinprivate.so.5
#11 0x00007ff2e8736969 in KFileItemModelRolesUpdater::slotGotPreview(KFileItem const&, QPixmap const&) () from /lib/x86_64-linux-gnu/libdolphinprivate.so.5
#12 0x00007ff2e68c3546 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007ff2e8441cd7 in KIO::PreviewJob::gotPreview(KFileItem const&, QPixmap const&) () from /lib/x86_64-linux-gnu/libKF5KIOWidgets.so.5
#14 0x00007ff2e8444cf3 in ?? () from /lib/x86_64-linux-gnu/libKF5KIOWidgets.so.5
#15 0x00007ff2e84457ac in ?? () from /lib/x86_64-linux-gnu/libKF5KIOWidgets.so.5
#16 0x00007ff2e68c3580 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007ff2e81f3734 in KIO::TransferJob::data(KIO::Job*, QByteArray const&) () from /lib/x86_64-linux-gnu/libKF5KIOCore.so.5
#18 0x00007ff2e68c3546 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007ff2e81d23d2 in KIO::SlaveInterface::data(QByteArray const&) () from /lib/x86_64-linux-gnu/libKF5KIOCore.so.5
#20 0x00007ff2e81d46e3 in KIO::SlaveInterface::dispatch(int, QByteArray const&) () from /lib/x86_64-linux-gnu/libKF5KIOCore.so.5
#21 0x00007ff2e81d2b09 in KIO::SlaveInterface::dispatch() () from /lib/x86_64-linux-gnu/libKF5KIOCore.so.5
#22 0x00007ff2e81d642a in KIO::Slave::gotInput() () from /lib/x86_64-linux-gnu/libKF5KIOCore.so.5
#23 0x00007ff2e68c3546 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007ff2e68b8f91 in QObject::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007ff2e734e15f in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#26 0x00007ff2e688cf6a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007ff2e688f9a1 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00007ff2e68e4e33 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007ff2e45dee6b in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x00007ff2e45df118 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#31 0x00007ff2e45df1cf in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#32 0x00007ff2e68e44bf in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#33 0x00007ff2e688b92b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#34 0x00007ff2e6893ba0 in QCoreApplication::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#35 0x00007ff2e89ea9e0 in kdemain () from /lib/x86_64-linux-gnu/libkdeinit5_dolphin.so
#36 0x00007ff2e87fed0a in __libc_start_main (main=0x559fde0b6050, argc=3, argv=0x7ffd7ff287b8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd7ff287a8) at ../csu/libc-start.c:308
#37 0x0000559fde0b608a in _start ()
[Inferior 1 (process 1598) detached]

Possible duplicates by query: bug 435068, bug 434860, bug 434456, bug 434435, bug 433897.

Reported using DrKonqi