[dolphin] [Bug 433218] New: Dolphin lags and then sometimes crashes when browsing locked device over KDE Connect

[Alex]

https://bugs.kde.org/show_bug.cgi?id=433218

            Bug ID: 433218
           Summary: Dolphin lags and then sometimes crashes when browsing
                    locked device over KDE Connect
           Product: dolphin
           Version: 20.12.2
          Platform: Fedora RPMs
                OS: Linux
            Status: REPORTED
          Severity: crash
          Priority: NOR
         Component: general
          Assignee: dolphin-bugs-null at kde.org
          Reporter: alex765 at protonmail.com
                CC: kfm-devel at kde.org
  Target Milestone: ---

When browsing my phone's files through KDE Connect, Dolphin works fine. The
issue occurs when I lock my phone's screen. The option to "Browse this device"
is still exposed, but after clicking it, Dolphin opens, locks up, and then
crashes.

This is on a Wayland session, Plasma 5.21, Frameworks 5.79.0, Qt 5.15.2

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

[KCrash Handler]
#4  0x00007fd725c0a292 in raise () from /lib64/libc.so.6
#5  0x00007fd725bf38a4 in abort () from /lib64/libc.so.6
#6  0x00007fd723af442d in qt_message_fatal (message=<synthetic pointer>...,
context=...) at global/qlogging.cpp:1914
#7  QMessageLogger::fatal (this=<optimized out>, msg=<optimized out>) at
global/qlogging.cpp:893
#8  0x00007fd72161aef3 in QtWaylandClient::QWaylandDisplay::checkError() const
[clone .cold] () from /lib64/libQt5WaylandClient.so.5
#9  0x00007fd7216296fa in QtWaylandClient::QWaylandDisplay::flushRequests() ()
from /lib64/libQt5WaylandClient.so.5
#10 0x00007fd723cf24fd in doActivate<false> (sender=0x56373bfeeb80,
signal_index=3, argv=0x7ffeac1c4950) at kernel/qobject.cpp:3898
#11 0x00007fd723cec9e7 in QMetaObject::activate
(sender=sender at entry=0x56373bfeeb80, m=m at entry=0x7fd723f87440
<QSocketNotifier::staticMetaObject>,
local_signal_index=local_signal_index at entry=0, argv=argv at entry=0x7ffeac1c4950)
at kernel/qobject.cpp:3946
#12 0x00007fd723cf4b3a in QSocketNotifier::activated
(this=this at entry=0x56373bfeeb80, _t1=..., _t2=<optimized out>, _t3=...) at
.moc/moc_qsocketnotifier.cpp:178
#13 0x00007fd723cf52d4 in QSocketNotifier::event (this=0x56373bfeeb80,
e=<optimized out>) at kernel/qsocketnotifier.cpp:302
#14 0x00007fd724813e73 in QApplicationPrivate::notify_helper (this=<optimized
out>, receiver=0x56373bfeeb80, e=0x7ffeac1c4a70) at
kernel/qapplication.cpp:3632
#15 0x00007fd723cc1f48 in QCoreApplication::notifyInternal2
(receiver=0x56373bfeeb80, event=0x7ffeac1c4a70) at
kernel/qcoreapplication.cpp:1063
#16 0x00007fd723d0f17f in socketNotifierSourceDispatch (source=0x56373bff1050)
at kernel/qeventdispatcher_glib.cpp:107
#17 0x00007fd721c3f0bf in g_main_context_dispatch () from
/lib64/libglib-2.0.so.0
#18 0x00007fd721c92358 in g_main_context_iterate.constprop () from
/lib64/libglib-2.0.so.0
#19 0x00007fd721c3c9b3 in g_main_context_iteration () from
/lib64/libglib-2.0.so.0
#20 0x00007fd723d0e6f8 in QEventDispatcherGlib::processEvents
(this=0x56373c0021b0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#21 0x00007fd723cc09b2 in QEventLoop::exec (this=0x7ffeac1c4c80, flags=...) at
../../include/QtCore/../../src/corelib/global/qflags.h:69
#22 0x00007fd724e12f7e in KJob::exec() () from /lib64/libKF5CoreAddons.so.5
#23 0x00007fd725b70707 in DolphinView::calculateItemCount(int&, int&, unsigned
long long&) const () from /lib64/libdolphinprivate.so.5
#24 0x00007fd725b66a57 in DolphinView::statusBarText() const () from
/lib64/libdolphinprivate.so.5
#25 0x00007fd725e02ede in DolphinViewContainer::updateStatusBar() () from
/lib64/libkdeinit5_dolphin.so
#26 0x00007fd723cf24b0 in QtPrivate::QSlotObjectBase::call (a=0x7ffeac1c4f40,
r=<optimized out>, this=0x56373c5bc1e0) at
../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
#27 doActivate<false> (sender=0x56373c5c4d00, signal_index=3,
argv=0x7ffeac1c4f40) at kernel/qobject.cpp:3886
#28 0x00007fd723cec9e7 in QMetaObject::activate (sender=<optimized out>,
m=m at entry=0x7fd723f87580 <QTimer::staticMetaObject>,
local_signal_index=local_signal_index at entry=0, argv=argv at entry=0x7ffeac1c4f40)
at kernel/qobject.cpp:3946
#29 0x00007fd723cf55ae in QTimer::timeout (this=<optimized out>, _t1=...) at
.moc/moc_qtimer.cpp:205
#30 0x00007fd723ce921f in QObject::event (this=0x56373c5c4d00,
e=0x7ffeac1c5090) at kernel/qobject.cpp:1336
#31 0x00007fd724813e73 in QApplicationPrivate::notify_helper (this=<optimized
out>, receiver=0x56373c5c4d00, e=0x7ffeac1c5090) at
kernel/qapplication.cpp:3632
#32 0x00007fd723cc1f48 in QCoreApplication::notifyInternal2
(receiver=0x56373c5c4d00, event=0x7ffeac1c5090) at
kernel/qcoreapplication.cpp:1063
#33 0x00007fd723d0d9e3 in QTimerInfoList::activateTimers (this=0x56373bffbf70)
at kernel/qtimerinfo_unix.cpp:643
#34 0x00007fd723d0e2ec in timerSourceDispatch (source=<optimized out>) at
kernel/qeventdispatcher_glib.cpp:183
#35 0x00007fd721c3f0bf in g_main_context_dispatch () from
/lib64/libglib-2.0.so.0
#36 0x00007fd721c92358 in g_main_context_iterate.constprop () from
/lib64/libglib-2.0.so.0
#37 0x00007fd721c3c9b3 in g_main_context_iteration () from
/lib64/libglib-2.0.so.0
#38 0x00007fd723d0e6f8 in QEventDispatcherGlib::processEvents
(this=0x56373c0021b0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#39 0x00007fd723cc09b2 in QEventLoop::exec (this=this at entry=0x7ffeac1c52d0,
flags=..., flags at entry=...) at
../../include/QtCore/../../src/corelib/global/qflags.h:69
#40 0x00007fd723cc8544 in QCoreApplication::exec () at
../../include/QtCore/../../src/corelib/global/qflags.h:121
#41 0x00007fd725df2d3d in kdemain () from /lib64/libkdeinit5_dolphin.so
#42 0x00007fd725bf4b75 in __libc_start_main () from /lib64/libc.so.6
#43 0x000056373abb50ae in _start ()
[Inferior 1 (process 41504) detached]

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