https://bugs.kde.org/show_bug.cgi?id=392890

            Bug ID: 392890
           Summary: [wayland] - Blur effect crashes Latte on exit
           Product: kwin
           Version: 5.12.4
          Platform: Other
                OS: Linux
            Status: UNCONFIRMED
          Severity: crash
          Priority: NOR
         Component: wayland-generic
          Assignee: kwin-bugs-n...@kde.org
          Reporter: mvourla...@gmail.com
  Target Milestone: ---

Latte Dock uses the following functions in order to blur the background:

KWindowEffects::enableBlurBehind
KWindowEffects::enableBackgroundContrast

even though blur doesnt work in my system because of:
https://bugs.kde.org/show_bug.cgi?id=392693

the following crash occurs for Latte when exits:

-------------------------------------------------------

Application: Latte Dock (latte-dock), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f5d820eb8c0 (LWP 23560))]

Thread 10 (Thread 0x7f5d0efbd700 (LWP 23598)):
#0  0x00007f5d77af0360 in pthread_cond_wait@@GLIBC_2.3.2 () at
../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5d7c6c567b in QWaitCondition::wait(QMutex*, unsigned long)
(time=18446744073709551615, this=0x75ebf30) at
thread/qwaitcondition_unix.cpp:143
#2  0x00007f5d7c6c567b in QWaitCondition::wait(QMutex*, unsigned long)
(this=this@entry=0x39885b8, mutex=mutex@entry=0x39885b0,
time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f5d7fe818fd in QSGRenderThread::processEventsAndWaitForMore()
(wait=true, this=0x39885a8) at scenegraph/qsgthreadedrenderloop.cpp:245
#4  0x00007f5d7fe818fd in QSGRenderThread::processEventsAndWaitForMore()
(this=this@entry=0x3988530) at scenegraph/qsgthreadedrenderloop.cpp:709
#5  0x00007f5d7fe821f5 in QSGRenderThread::run() (this=0x3988530) at
scenegraph/qsgthreadedrenderloop.cpp:738
#6  0x00007f5d7c6c46eb in QThreadPrivate::start(void*) (arg=0x3988530) at
thread/qthread_unix.cpp:376
#7  0x00007f5d77aea6ba in start_thread (arg=0x7f5d0efbd700) at
pthread_create.c:333
#8  0x00007f5d7bab241d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7f5d0fffe700 (LWP 23597)):
#0  0x00007f5d7baa227d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f5d753706f0 in g_wakeup_acknowledge (__nbytes=16,
__buf=0x7f5d0fffdad0, __fd=<optimized out>) at
/usr/include/x86_64-linux-gnu/bits/unistd.h:44
#2  0x00007f5d753706f0 in g_wakeup_acknowledge (wakeup=0x7f5d14002330) at
/build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gwakeup.c:210
#3  0x00007f5d7532ce74 in g_main_context_check
(context=context@entry=0x7f5d08000990, max_priority=2147483647,
fds=fds@entry=0x7f5d08003270, n_fds=n_fds@entry=1) at
/build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3632
#4  0x00007f5d7532d330 in g_main_context_iterate
(context=context@entry=0x7f5d08000990, block=block@entry=1,
dispatch=dispatch@entry=1, self=<optimized out>) at
/build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3837
#5  0x00007f5d7532d49c in g_main_context_iteration (context=0x7f5d08000990,
may_block=may_block@entry=1) at
/build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3901
#6  0x00007f5d7c8f85cb in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x7f5d080008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#7  0x00007f5d7c89f64a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this@entry=0x7f5d0fffdce0, flags=..., flags@entry=...) at
kernel/qeventloop.cpp:212
#8  0x00007f5d7c6bf554 in QThread::exec() (this=this@entry=0x7b5fe40) at
thread/qthread.cpp:522
#9  0x00007f5d7f9a4a35 in QQmlThreadPrivate::run() (this=0x7b5fe40) at
qml/ftw/qqmlthread.cpp:147
#10 0x00007f5d7c6c46eb in QThreadPrivate::start(void*) (arg=0x7b5fe40) at
thread/qthread_unix.cpp:376
#11 0x00007f5d77aea6ba in start_thread (arg=0x7f5d0fffe700) at
pthread_create.c:333
#12 0x00007f5d7bab241d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f5d1bdfb700 (LWP 23578)):
#0  0x00007f5d7532c908 in g_main_context_prepare
(context=context@entry=0x7f5d14000990, priority=priority@entry=0x7f5d1bdfab80)
at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3440
#1  0x00007f5d7532d2bb in g_main_context_iterate
(context=context@entry=0x7f5d14000990, block=block@entry=1,
dispatch=dispatch@entry=1, self=<optimized out>) at
/build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3820
#2  0x00007f5d7532d49c in g_main_context_iteration (context=0x7f5d14000990,
may_block=may_block@entry=1) at
/build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3901
#3  0x00007f5d7c8f85cb in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x7f5d140008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f5d7c89f64a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this@entry=0x7f5d1bdfacc0, flags=..., flags@entry=...) at
kernel/qeventloop.cpp:212
#5  0x00007f5d7c6bf554 in QThread::exec() (this=<optimized out>) at
thread/qthread.cpp:522
#6  0x00007f5d211bd517 in KCupsConnection::run() () at
/usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007f5d7c6c46eb in QThreadPrivate::start(void*) (arg=0x750fc30) at
thread/qthread_unix.cpp:376
#8  0x00007f5d77aea6ba in start_thread (arg=0x7f5d1bdfb700) at
pthread_create.c:333
#9  0x00007f5d7bab241d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f5d2d4fb700 (LWP 23572)):
#0  0x00007f5d77af0360 in pthread_cond_wait@@GLIBC_2.3.2 () at
../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5d7c6c567b in QWaitCondition::wait(QMutex*, unsigned long)
(time=18446744073709551615, this=0x40e3280) at
thread/qwaitcondition_unix.cpp:143
#2  0x00007f5d7c6c567b in QWaitCondition::wait(QMutex*, unsigned long)
(this=this@entry=0x408bb78, mutex=mutex@entry=0x408bb70,
time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f5d7fe818fd in QSGRenderThread::processEventsAndWaitForMore()
(wait=true, this=0x408bb68) at scenegraph/qsgthreadedrenderloop.cpp:245
#4  0x00007f5d7fe818fd in QSGRenderThread::processEventsAndWaitForMore()
(this=this@entry=0x408baf0) at scenegraph/qsgthreadedrenderloop.cpp:709
#5  0x00007f5d7fe821f5 in QSGRenderThread::run() (this=0x408baf0) at
scenegraph/qsgthreadedrenderloop.cpp:738
#6  0x00007f5d7c6c46eb in QThreadPrivate::start(void*) (arg=0x408baf0) at
thread/qthread_unix.cpp:376
#7  0x00007f5d77aea6ba in start_thread (arg=0x7f5d2d4fb700) at
pthread_create.c:333
#8  0x00007f5d7bab241d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f5d2e4fc700 (LWP 23571)):
#0  0x00007f5d77af0360 in pthread_cond_wait@@GLIBC_2.3.2 () at
../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5d7c6c567b in QWaitCondition::wait(QMutex*, unsigned long)
(time=18446744073709551615, this=0x37193c0) at
thread/qwaitcondition_unix.cpp:143
#2  0x00007f5d7c6c567b in QWaitCondition::wait(QMutex*, unsigned long)
(this=this@entry=0x408c358, mutex=mutex@entry=0x408c350,
time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f5d7fe818fd in QSGRenderThread::processEventsAndWaitForMore()
(wait=true, this=0x408c348) at scenegraph/qsgthreadedrenderloop.cpp:245
#4  0x00007f5d7fe818fd in QSGRenderThread::processEventsAndWaitForMore()
(this=this@entry=0x408c2d0) at scenegraph/qsgthreadedrenderloop.cpp:709
#5  0x00007f5d7fe821f5 in QSGRenderThread::run() (this=0x408c2d0) at
scenegraph/qsgthreadedrenderloop.cpp:738
#6  0x00007f5d7c6c46eb in QThreadPrivate::start(void*) (arg=0x408c2d0) at
thread/qthread_unix.cpp:376
#7  0x00007f5d77aea6ba in start_thread (arg=0x7f5d2e4fc700) at
pthread_create.c:333
#8  0x00007f5d7bab241d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f5d360a9700 (LWP 23570)):
#0  0x00007f5d7baa674d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f5d7532d38c in g_main_context_iterate (priority=2147483647, n_fds=1,
fds=0x7f5d28002e70, timeout=<optimized out>, context=0x7f5d28000990) at
/build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:4135
#2  0x00007f5d7532d38c in g_main_context_iterate
(context=context@entry=0x7f5d28000990, block=block@entry=1,
dispatch=dispatch@entry=1, self=<optimized out>) at
/build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3835
#3  0x00007f5d7532d49c in g_main_context_iteration (context=0x7f5d28000990,
may_block=may_block@entry=1) at
/build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3901
#4  0x00007f5d7c8f85cb in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x7f5d280008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f5d7c89f64a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this@entry=0x7f5d360a8d00, flags=..., flags@entry=...) at
kernel/qeventloop.cpp:212
#6  0x00007f5d7c6bf554 in QThread::exec() (this=<optimized out>) at
thread/qthread.cpp:522
#7  0x00007f5d7c6c46eb in QThreadPrivate::start(void*) (arg=0x274af10) at
thread/qthread_unix.cpp:376
#8  0x00007f5d77aea6ba in start_thread (arg=0x7f5d360a9700) at
pthread_create.c:333
#9  0x00007f5d7bab241d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f5d368aa700 (LWP 23569)):
#0  0x00007f5d7baa227d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f5d753706f0 in g_wakeup_acknowledge (__nbytes=16,
__buf=0x7f5d368a9ad0, __fd=<optimized out>) at
/usr/include/x86_64-linux-gnu/bits/unistd.h:44
#2  0x00007f5d753706f0 in g_wakeup_acknowledge (wakeup=0x7f5d40002780) at
/build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gwakeup.c:210
#3  0x00007f5d7532ce74 in g_main_context_check
(context=context@entry=0x7f5d30000990, max_priority=2147483647,
fds=fds@entry=0x7f5d300013c0, n_fds=n_fds@entry=1) at
/build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3632
#4  0x00007f5d7532d330 in g_main_context_iterate
(context=context@entry=0x7f5d30000990, block=block@entry=1,
dispatch=dispatch@entry=1, self=<optimized out>) at
/build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3837
#5  0x00007f5d7532d49c in g_main_context_iteration (context=0x7f5d30000990,
may_block=may_block@entry=1) at
/build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3901
#6  0x00007f5d7c8f85cb in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x7f5d300008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#7  0x00007f5d7c89f64a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this@entry=0x7f5d368a9ce0, flags=..., flags@entry=...) at
kernel/qeventloop.cpp:212
#8  0x00007f5d7c6bf554 in QThread::exec() (this=this@entry=0x301a740) at
thread/qthread.cpp:522
#9  0x00007f5d36f071d5 in QQuickXmlQueryEngine::run() (this=0x301a740) at
qqmlxmllistmodel.cpp:323
#10 0x00007f5d7c6c46eb in QThreadPrivate::start(void*) (arg=0x301a740) at
thread/qthread_unix.cpp:376
#11 0x00007f5d77aea6ba in start_thread (arg=0x7f5d368aa700) at
pthread_create.c:333
#12 0x00007f5d7bab241d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f5d616fc700 (LWP 23564)):
#0  0x00007f5d7baa227d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f5d753706f0 in g_wakeup_acknowledge (__nbytes=16,
__buf=0x7f5d616fbad0, __fd=<optimized out>) at
/usr/include/x86_64-linux-gnu/bits/unistd.h:44
#2  0x00007f5d753706f0 in g_wakeup_acknowledge (wakeup=0x7f5d5c0025a0) at
/build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gwakeup.c:210
#3  0x00007f5d7532ce74 in g_main_context_check
(context=context@entry=0x7f5d58000990, max_priority=2147483647,
fds=fds@entry=0x7f5d58002e70, n_fds=n_fds@entry=1) at
/build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3632
#4  0x00007f5d7532d330 in g_main_context_iterate
(context=context@entry=0x7f5d58000990, block=block@entry=1,
dispatch=dispatch@entry=1, self=<optimized out>) at
/build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3837
#5  0x00007f5d7532d49c in g_main_context_iteration (context=0x7f5d58000990,
may_block=may_block@entry=1) at
/build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3901
#6  0x00007f5d7c8f85cb in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x7f5d580008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#7  0x00007f5d7c89f64a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this@entry=0x7f5d616fbce0, flags=..., flags@entry=...) at
kernel/qeventloop.cpp:212
#8  0x00007f5d7c6bf554 in QThread::exec() (this=this@entry=0x22c2740) at
thread/qthread.cpp:522
#9  0x00007f5d7f9a4a35 in QQmlThreadPrivate::run() (this=0x22c2740) at
qml/ftw/qqmlthread.cpp:147
#10 0x00007f5d7c6c46eb in QThreadPrivate::start(void*) (arg=0x22c2740) at
thread/qthread_unix.cpp:376
#11 0x00007f5d77aea6ba in start_thread (arg=0x7f5d616fc700) at
pthread_create.c:333
#12 0x00007f5d7bab241d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f5d6b55a700 (LWP 23561)):
#0  0x00007f5d75371a94 in g_mutex_unlock (mutex=0x7f5d64000990) at
/build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gthread-posix.c:1347
#1  0x00007f5d7532c38e in g_main_context_acquire (context=0x7f5d64000990) at
/build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3228
#2  0x00007f5d7532d245 in g_main_context_iterate
(context=context@entry=0x7f5d64000990, block=block@entry=1,
dispatch=dispatch@entry=1, self=<optimized out>) at
/build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3790
#3  0x00007f5d7532d49c in g_main_context_iteration (context=0x7f5d64000990,
may_block=may_block@entry=1) at
/build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3901
#4  0x00007f5d7c8f85cb in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x7f5d640008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f5d7c89f64a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this@entry=0x7f5d6b559cd0, flags=..., flags@entry=...) at
kernel/qeventloop.cpp:212
#6  0x00007f5d7c6bf554 in QThread::exec() (this=<optimized out>) at
thread/qthread.cpp:522
#7  0x00007f5d7df8e2c5 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#8  0x00007f5d7c6c46eb in QThreadPrivate::start(void*) (arg=0x7f5d7e202d60) at
thread/qthread_unix.cpp:376
#9  0x00007f5d77aea6ba in start_thread (arg=0x7f5d6b55a700) at
pthread_create.c:333
#10 0x00007f5d7bab241d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f5d820eb8c0 (LWP 23560)):
[KCrash Handler]
#4  0x00007f5d798b4cc6 in wl_proxy_marshal_constructor (proxy=0x0,
opcode=opcode@entry=0, interface=0x7f5d8148d5a0 <org_kde_kwin_blur_interface>)
at ../src/wayland-client.c:729
#5  0x00007f5d812217e0 in
KWayland::Client::BlurManager::createBlur(KWayland::Client::Surface*, QObject*)
(surface=<optimized out>, org_kde_kwin_blur_manager=<optimized out>) at
/workspace/build/obj-x86_64-linux-gnu/src/client/wayland-blur-client-protocol.h:112
#6  0x00007f5d812217e0 in
KWayland::Client::BlurManager::createBlur(KWayland::Client::Surface*, QObject*)
(this=0x27ca8f0, surface=0x354cb00, parent=0x354cb00) at
/workspace/build/src/client/blur.cpp:91
#7  0x00007f5d543767fb in  () at
/usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemKWaylandPlugin.so
#8  0x00000000004aec5f in Latte::DockView::updateEffects() ()
#9  0x00007f5d7c8ce7b6 in QMetaObject::activate(QObject*, int, int, void**)
(a=0x7fffa2cd72a0, r=0x35c16b0, this=<optimized out>) at
../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:378
#10 0x00007f5d7c8ce7b6 in QMetaObject::activate(QObject*, int, int, void**)
(sender=0x35c16b0, signalOffset=<optimized out>, local_signal_index=<optimized
out>, argv=<optimized out>) at kernel/qobject.cpp:3749
#11 0x00000000004ad389 in Latte::DockView::setEffectsArea(QRect) ()
#12 0x00000000004d4c01 in Latte::DockView::qt_static_metacall(QObject*,
QMetaObject::Call, int, void**) ()
#13 0x00000000004d85ab in Latte::DockView::qt_metacall(QMetaObject::Call, int,
void**) ()
#14 0x00007f5d7f9104ec in QQmlPropertyData::writeProperty(QObject*, void*,
QFlags<QQmlPropertyData::WriteFlag>) const (this=this@entry=0x2d101e8,
target=target@entry=0x35c16b0, value=<optimized out>, flags=...) at
../../include/QtQml/5.10.0/QtQml/private/../../../../../src/qml/qml/qqmlpropertycache_p.h:324
#15 0x00007f5d7f90efe6 in QQmlPropertyPrivate::write(QObject*, QQmlPropertyData
const&, QVariant const&, QQmlContextData*, QFlags<QQmlPropertyData::WriteFlag>)
(object=object@entry=0x35c16b0, property=..., value=..., context=0x3af2920,
flags=..., flags@entry=...) at qml/qqmlproperty.cpp:1243
#16 0x00007f5d7f8d81cf in
QV4::QObjectWrapper::setProperty(QV4::ExecutionEngine*, QObject*,
QQmlPropertyData*, QV4::Value const&) (engine=engine@entry=0x22c3770,
object=object@entry=0x35c16b0, property=0x2d101e8, value=...) at
jsruntime/qv4qobjectwrapper.cpp:550
#17 0x00007f5d7f8d8d1b in
QV4::QObjectWrapper::setQmlProperty(QV4::ExecutionEngine*, QQmlContextData*,
QObject*, QV4::String*, QV4::QObjectWrapper::RevisionMode, QV4::Value const&)
(engine=0x22c3770, qmlContext=<optimized out>, object=0x35c16b0,
name=<optimized out>, revisionMode=QV4::QObjectWrapper::IgnoreRevision,
value=...) at jsruntime/qv4qobjectwrapper.cpp:423
#18 0x00007f5d7f8d8e1d in QV4::QObjectWrapper::put(QV4::Managed*, QV4::String*,
QV4::Value const&) (m=0x7f5d606bd4e8, name=0x7f5d606bd4e0, value=...) at
jsruntime/qv4qobjectwrapper.cpp:697
#19 0x00007f5d7f8e7e1d in
QV4::Runtime::method_setProperty(QV4::ExecutionEngine*, QV4::Value const&, int,
QV4::Value const&) (v=..., name=<optimized out>, this=<optimized out>) at
jsruntime/qv4object_p.h:386
#20 0x00007f5d7f8e7e1d in
QV4::Runtime::method_setProperty(QV4::ExecutionEngine*, QV4::Value const&, int,
QV4::Value const&) (engine=0x22c3770, object=..., nameIndex=<optimized out>,
value=...) at jsruntime/qv4runtime.cpp:601
#21 0x00007f5d3d18885e in  ()
#22 0x0000000007691d38 in  ()
#23 0x0000000000000001 in  ()
#24 0x0000000000000000 in  ()

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