Bug 335281

Summary: Crash when ejecting DVD
Product: [Applications] k3b Reporter: Simon Reed <BugZilla>
Component: generalAssignee: k3b developers <k3b>
Status: RESOLVED WORKSFORME    
Severity: crash CC: kdenis, trueg
Priority: NOR Keywords: drkonqi
Version: 2.0.2   
Target Milestone: ---   
Platform: Ubuntu   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description Simon Reed 2014-05-24 14:28:26 UTC 
Application: k3b (2.0.2)
KDE Platform Version: 4.11.5
Qt Version: 4.8.4
Operating System: Linux 3.11.0-20-generic x86_64
Distribution: Ubuntu 13.10

-- Information about the crash:
- What I was doing when the application crashed:

I had burned a (Linux .ISO) DVD.  After completion, I inserted the DVD, opened a terminal session and made the DVD my default directory ( cd /media/simon/Xubuntu\ 12.04.4\ LTS\ amd64/ ), checked the contents ( md5sum -c md5sum.txt ) (they were OK), exited the terminal session then, in PCManFM 1.1.2 I clicked on the Eject icon for the drive.  That is when the crash occurred.

-- Backtrace:
Application: K3b (k3b), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fb6895bc800 (LWP 15106))]

Thread 9 (Thread 0x7fb66908f700 (LWP 15107)):
#0  0x00007fb682a2c6bd in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fb678e09e61 in ?? () from /usr/lib/nvidia-319-updates/tls/libnvidia-tls.so.319.60
#2  0x00007fb67ddef670 in read (__nbytes=16, __buf=0x7fb66908eca0, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
#3  g_wakeup_acknowledge (wakeup=0xc38690) at /build/buildd/glib2.0-2.38.1/./glib/gwakeup.c:212
#4  0x00007fb67ddb01cc in g_main_context_check (context=context@entry=0xc39470, max_priority=2147483647, fds=fds@entry=0x7fb6640010e0, n_fds=n_fds@entry=1) at /build/buildd/glib2.0-2.38.1/./glib/gmain.c:3513
#5  0x00007fb67ddb063b in g_main_context_iterate (context=0xc39470, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.38.1/./glib/gmain.c:3709
#6  0x00007fb67ddb0b0a in g_main_loop_run (loop=0xc39400) at /build/buildd/glib2.0-2.38.1/./glib/gmain.c:3906
#7  0x00007fb66fd43b66 in gdbus_shared_thread_func (user_data=0xc39440) at /build/buildd/glib2.0-2.38.1/./gio/gdbusprivate.c:278
#8  0x00007fb67ddd50f5 in g_thread_proxy (data=0xbec940) at /build/buildd/glib2.0-2.38.1/./glib/gthread.c:798
#9  0x00007fb67d027f6e in start_thread (arg=0x7fb66908f700) at pthread_create.c:311
#10 0x00007fb682a3a9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 8 (Thread 0x7fb66888e700 (LWP 15108)):
#0  0x00007fb682a2df7d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fb67ddb06a4 in g_main_context_poll (priority=2147483647, n_fds=2, fds=0x7fb65c0008c0, timeout=-1, context=0x8da700) at /build/buildd/glib2.0-2.38.1/./glib/gmain.c:4006
#2  g_main_context_iterate (context=context@entry=0x8da700, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.38.1/./glib/gmain.c:3707
#3  0x00007fb67ddb07ac in g_main_context_iteration (context=0x8da700, may_block=may_block@entry=1) at /build/buildd/glib2.0-2.38.1/./glib/gmain.c:3773
#4  0x00007fb67ddb07f9 in glib_worker_main (data=<optimized out>) at /build/buildd/glib2.0-2.38.1/./glib/gmain.c:5472
#5  0x00007fb67ddd50f5 in g_thread_proxy (data=0xbec8a0) at /build/buildd/glib2.0-2.38.1/./glib/gthread.c:798
#6  0x00007fb67d027f6e in start_thread (arg=0x7fb66888e700) at pthread_create.c:311
#7  0x00007fb682a3a9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 7 (Thread 0x7fb656c6f700 (LWP 15110)):
#0  0x00007fb67ddf00ea in g_mutex_get_impl (mutex=0x7fb6500009a0) at /build/buildd/glib2.0-2.38.1/./glib/gthread-posix.c:124
#1  0x00007fb67ddf03c9 in g_mutex_unlock (mutex=mutex@entry=0x7fb6500009a0) at /build/buildd/glib2.0-2.38.1/./glib/gthread-posix.c:232
#2  0x00007fb67ddafdd8 in g_main_context_prepare (context=context@entry=0x7fb6500009a0, priority=priority@entry=0x7fb656c6ebf8) at /build/buildd/glib2.0-2.38.1/./glib/gmain.c:3404
#3  0x00007fb67ddb05c3 in g_main_context_iterate (context=context@entry=0x7fb6500009a0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.38.1/./glib/gmain.c:3692
#4  0x00007fb67ddb07ac in g_main_context_iteration (context=0x7fb6500009a0, may_block=1) at /build/buildd/glib2.0-2.38.1/./glib/gmain.c:3773
#5  0x00007fb6840efa76 in QEventDispatcherGlib::processEvents (this=0x7fb6500008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007fb6840c15ef in QEventLoop::processEvents (this=this@entry=0x7fb656c6ed30, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007fb6840c18e5 in QEventLoop::exec (this=this@entry=0x7fb656c6ed30, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007fb683fc088f in QThread::exec (this=this@entry=0xb51b50) at thread/qthread.cpp:542
#9  0x00007fb6840a2d13 in QInotifyFileSystemWatcherEngine::run (this=0xb51b50) at io/qfilesystemwatcher_inotify.cpp:265
#10 0x00007fb683fc2f2f in QThreadPrivate::start (arg=0xb51b50) at thread/qthread_unix.cpp:338
#11 0x00007fb67d027f6e in start_thread (arg=0x7fb656c6f700) at pthread_create.c:311
#12 0x00007fb682a3a9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 6 (Thread 0x7fb64e155700 (LWP 15703)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb6871501cd in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007fb687150209 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007fb67d027f6e in start_thread (arg=0x7fb64e155700) at pthread_create.c:311
#4  0x00007fb682a3a9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 5 (Thread 0x7fb64d1bf700 (LWP 15704)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb686e90bbd in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007fb68717fa76 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007fb67d027f6e in start_thread (arg=0x7fb64d1bf700) at pthread_create.c:311
#4  0x00007fb682a3a9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 4 (Thread 0x7fb64c9be700 (LWP 15705)):
#0  0x00007fb682a2df7d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fb67ddb06a4 in g_main_context_poll (priority=2147483647, n_fds=1, fds=0x7fb5ec001bc0, timeout=5935, context=0x7fb5ec0009a0) at /build/buildd/glib2.0-2.38.1/./glib/gmain.c:4006
#2  g_main_context_iterate (context=context@entry=0x7fb5ec0009a0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.38.1/./glib/gmain.c:3707
#3  0x00007fb67ddb07ac in g_main_context_iteration (context=0x7fb5ec0009a0, may_block=1) at /build/buildd/glib2.0-2.38.1/./glib/gmain.c:3773
#4  0x00007fb6840efa76 in QEventDispatcherGlib::processEvents (this=0x7fb5ec0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#5  0x00007fb6840c15ef in QEventLoop::processEvents (this=this@entry=0x7fb64c9bdd70, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007fb6840c18e5 in QEventLoop::exec (this=this@entry=0x7fb64c9bdd70, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007fb683fc088f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#8  0x00007fb683fc2f2f in QThreadPrivate::start (arg=0x14ec9b0) at thread/qthread_unix.cpp:338
#9  0x00007fb67d027f6e in start_thread (arg=0x7fb64c9be700) at pthread_create.c:311
#10 0x00007fb682a3a9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 3 (Thread 0x7fb663fff700 (LWP 18007)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1  0x00007fb683fc1b7a in thread_sleep (ti=ti@entry=0x7fb663ffed40) at thread/qthread_unix.cpp:475
#2  0x00007fb683fc22d6 in QThread::sleep (secs=secs@entry=2) at thread/qthread_unix.cpp:489
#3  0x00007fb688eaf7f5 in K3b::MediaCache::PollThread::run (this=0x171e500) at /build/buildd/k3b-2.0.2/libk3b/tools/k3bmediacache.cpp:106
#4  0x00007fb683fc2f2f in QThreadPrivate::start (arg=0x171e500) at thread/qthread_unix.cpp:338
#5  0x00007fb67d027f6e in start_thread (arg=0x7fb663fff700) at pthread_create.c:311
#6  0x00007fb682a3a9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 2 (Thread 0x7fb5ebd8f700 (LWP 18008)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1  0x00007fb683fc1b7a in thread_sleep (ti=ti@entry=0x7fb5ebd8ed40) at thread/qthread_unix.cpp:475
#2  0x00007fb683fc22d6 in QThread::sleep (secs=secs@entry=2) at thread/qthread_unix.cpp:489
#3  0x00007fb688eaf7f5 in K3b::MediaCache::PollThread::run (this=0x163ad30) at /build/buildd/k3b-2.0.2/libk3b/tools/k3bmediacache.cpp:106
#4  0x00007fb683fc2f2f in QThreadPrivate::start (arg=0x163ad30) at thread/qthread_unix.cpp:338
#5  0x00007fb67d027f6e in start_thread (arg=0x7fb5ebd8f700) at pthread_create.c:311
#6  0x00007fb682a3a9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 1 (Thread 0x7fb6895bc800 (LWP 15106)):
[KCrash Handler]
#6  0x00000000004f53a6 in K3b::MetaItemModel::slotRowsAboutToBeRemoved (this=0x0, parent=..., start=0, end=0) at /build/buildd/k3b-2.0.2/src/k3bmetaitemmodel.cpp:902
#7  0x00007fb6840d6a58 in QMetaObject::activate (sender=sender@entry=0x1207cc0, m=m@entry=0x7fb6844256a0 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=6, argv=argv@entry=0x7fffa6b63190) at kernel/qobject.cpp:3539
#8  0x00007fb684120714 in QAbstractItemModel::rowsAboutToBeRemoved (this=this@entry=0x1207cc0, _t1=..., _t2=_t2@entry=0, _t3=_t3@entry=0) at .moc/release-shared/moc_qabstractitemmodel.cpp:204
#9  0x00007fb6840b9315 in QAbstractItemModel::beginRemoveRows (this=0x1207cc0, parent=..., first=0, last=0) at kernel/qabstractitemmodel.cpp:2470
#10 0x00007fb68374f685 in QSortFilterProxyModelPrivate::remove_proxy_interval (this=this@entry=0x12080a0, source_to_proxy=..., proxy_to_source=..., proxy_start=<optimized out>, proxy_end=0, proxy_parent=..., orient=orient@entry=Qt::Vertical, emit_signal=emit_signal@entry=true) at itemviews/qsortfilterproxymodel.cpp:557
#11 0x00007fb683753b0f in QSortFilterProxyModelPrivate::remove_source_items (this=this@entry=0x12080a0, source_to_proxy=..., proxy_to_source=..., source_items=..., source_parent=..., orient=orient@entry=Qt::Vertical, emit_signal=emit_signal@entry=true) at itemviews/qsortfilterproxymodel.cpp:539
#12 0x00007fb683753d2d in QSortFilterProxyModelPrivate::source_items_about_to_be_removed (this=0x12080a0, source_parent=..., start=0, end=0, orient=Qt::Vertical) at itemviews/qsortfilterproxymodel.cpp:840
#13 0x00007fb6840d6a58 in QMetaObject::activate (sender=sender@entry=0x96e880, m=m@entry=0x7fb6844256a0 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=6, argv=argv@entry=0x7fffa6b634d0) at kernel/qobject.cpp:3539
#14 0x00007fb684120714 in QAbstractItemModel::rowsAboutToBeRemoved (this=this@entry=0x96e880, _t1=..., _t2=_t2@entry=0, _t3=_t3@entry=0) at .moc/release-shared/moc_qabstractitemmodel.cpp:204
#15 0x00007fb6840b9315 in QAbstractItemModel::beginRemoveRows (this=0x96e880, parent=..., first=first@entry=0, last=last@entry=0) at kernel/qabstractitemmodel.cpp:2470
#16 0x00007fb688575fa6 in KDirModelPrivate::_k_slotDeleteItems (this=0x11f8cb0, items=...) at ../../kio/kio/kdirmodel.cpp:474
#17 0x00007fb6840d6a58 in QMetaObject::activate (sender=0x975d00, m=m@entry=0x7fb6888ecd60 <KDirLister::staticMetaObject>, local_signal_index=local_signal_index@entry=13, argv=argv@entry=0x7fffa6b63790) at kernel/qobject.cpp:3539
#18 0x00007fb68855ded5 in KDirLister::itemsDeleted (this=<optimized out>, _t1=...) at ./kdirlister.moc:309
#19 0x00007fb68855f815 in KDirLister::Private::emitItemsDeleted (this=0x1206e30, _items=...) at ../../kio/kio/kdirlister.cpp:2553
#20 0x00007fb6885667df in KDirListerCache::itemsDeleted (this=this@entry=0x954ae0, listers=..., deletedItems=...) at ../../kio/kio/kdirlister.cpp:1893
#21 0x00007fb6885669be in KDirListerCache::deleteUnmarkedItems (this=this@entry=0x954ae0, listers=..., lstItems=...) at ../../kio/kio/kdirlister.cpp:1887
#22 0x00007fb6885688cf in KDirListerCache::slotUpdateResult (this=<optimized out>, j=<optimized out>) at ../../kio/kio/kdirlister.cpp:1823
#23 0x00007fb6840d6a58 in QMetaObject::activate (sender=sender@entry=0x1900ed0, m=m@entry=0x7fb6848e2600 <KJob::staticMetaObject>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7fffa6b63b10) at kernel/qobject.cpp:3539
#24 0x00007fb684552752 in KJob::result (this=this@entry=0x1900ed0, _t1=_t1@entry=0x1900ed0) at ./kjob.moc:208
#25 0x00007fb684552790 in KJob::emitResult (this=this@entry=0x1900ed0) at ../../kdecore/jobs/kjob.cpp:318
#26 0x00007fb688547a4a in KIO::SimpleJob::slotFinished (this=this@entry=0x1900ed0) at ../../kio/kio/job.cpp:496
#27 0x00007fb68854c44e in KIO::ListJob::slotFinished (this=0x1900ed0) at ../../kio/kio/job.cpp:2716
#28 0x00007fb6840d6a58 in QMetaObject::activate (sender=0xaaf3e0, m=m@entry=0x7fb6888f0580 <KIO::SlaveInterface::staticMetaObject>, local_signal_index=local_signal_index@entry=4, argv=argv@entry=0x0) at kernel/qobject.cpp:3539
#29 0x00007fb6885e5953 in KIO::SlaveInterface::finished (this=<optimized out>) at ./slaveinterface.moc:185
#30 0x00007fb6885e6e96 in KIO::SlaveInterface::dispatch (this=<optimized out>, _cmd=104, rawdata=...) at ../../kio/kio/slaveinterface.cpp:176
#31 0x00007fb6885e498e in KIO::SlaveInterface::dispatch (this=0xaaf3e0) at ../../kio/kio/slaveinterface.cpp:92
#32 0x00007fb6885d95f6 in KIO::Slave::gotInput (this=0xaaf3e0) at ../../kio/kio/slave.cpp:344
#33 0x00007fb6840d6a58 in QMetaObject::activate (sender=0x16d7e80, m=m@entry=0x7fb6888e9aa0 <KIO::Connection::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3539
#34 0x00007fb6885151e0 in KIO::Connection::readyRead (this=<optimized out>) at ./connection.moc:106
#35 0x00007fb6885158d1 in KIO::ConnectionPrivate::dequeue (this=0x11d1430) at ../../kio/kio/connection.cpp:82
#36 0x00007fb6840dadce in QObject::event (this=0x16d7e80, e=<optimized out>) at kernel/qobject.cpp:1194
#37 0x00007fb6831d9dfc in QApplicationPrivate::notify_helper (this=this@entry=0xa27080, receiver=receiver@entry=0x16d7e80, e=e@entry=0x15e3c90) at kernel/qapplication.cpp:4567
#38 0x00007fb6831e0470 in QApplication::notify (this=this@entry=0x7fffa6b648f0, receiver=receiver@entry=0x16d7e80, e=e@entry=0x15e3c90) at kernel/qapplication.cpp:4353
#39 0x00007fb684b19a6a in KApplication::notify (this=0x7fffa6b648f0, receiver=0x16d7e80, event=0x15e3c90) at ../../kdeui/kernel/kapplication.cpp:311
#40 0x00007fb6840c28bd in QCoreApplication::notifyInternal (this=0x7fffa6b648f0, receiver=receiver@entry=0x16d7e80, event=event@entry=0x15e3c90) at kernel/qcoreapplication.cpp:946
#41 0x00007fb6840c5e1f in sendEvent (event=0x15e3c90, receiver=0x16d7e80) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#42 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x8ca220) at kernel/qcoreapplication.cpp:1570
#43 0x00007fb6840c62c3 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1463
#44 0x00007fb6840f0073 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#45 postEventSourceDispatch (s=s@entry=0x9f20c0) at kernel/qeventdispatcher_glib.cpp:279
#46 0x00007fb67ddb03b6 in g_main_dispatch (context=0xa27430) at /build/buildd/glib2.0-2.38.1/./glib/gmain.c:3065
#47 g_main_context_dispatch (context=context@entry=0xa27430) at /build/buildd/glib2.0-2.38.1/./glib/gmain.c:3641
#48 0x00007fb67ddb0708 in g_main_context_iterate (context=context@entry=0xa27430, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.38.1/./glib/gmain.c:3712
#49 0x00007fb67ddb07ac in g_main_context_iteration (context=0xa27430, may_block=1) at /build/buildd/glib2.0-2.38.1/./glib/gmain.c:3773
#50 0x00007fb6840efa55 in QEventDispatcherGlib::processEvents (this=0x8cbb00, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#51 0x00007fb68327b9d6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#52 0x00007fb6840c15ef in QEventLoop::processEvents (this=this@entry=0x7fffa6b64710, flags=...) at kernel/qeventloop.cpp:149
#53 0x00007fb6840c18e5 in QEventLoop::exec (this=this@entry=0x7fffa6b64710, flags=...) at kernel/qeventloop.cpp:204
#54 0x00007fb6840c6e5b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#55 0x00007fb6831d834c in QApplication::exec () at kernel/qapplication.cpp:3828
#56 0x00000000004449a2 in main (argc=<optimized out>, argv=0x7fffa6b64a38) at /build/buildd/k3b-2.0.2/src/main.cpp:165

Possible duplicates by query: bug 331348, bug 323117, bug 285327.

Reported using DrKonqi
Comment 1 Denis Kurz 2018-01-31 16:05:02 UTC 
You might want to consider if this was caused by a Qt bug that was resolved fixed in 5.8, as described in Bug 361895, Comment 1.
Comment 2 Justin Zobel 2020-12-17 05:33:51 UTC 
Thank you for the crash report.

As it has been a while since this was reported, can you please test and confirm if this issue is still occurring or if this bug report can be marked as resolved.

I have set the bug status to "needsinfo" pending your response, please change back to "reported" or "resolved/worksforme" when you respond, thank you.
Comment 3 Bug Janitor Service 2021-01-01 04:34:57 UTC 
Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!
Comment 4 Bug Janitor Service 2021-01-16 04:34:15 UTC 
This bug has been in NEEDSINFO status with no change for at least
30 days. The bug is now closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

Thank you for helping us make KDE software even better for everyone!