https://bugs.kde.org/show_bug.cgi?id=365964
--- Comment #5 from Guo Yunhe (郭云鹤) ---
Got it, here is it:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fcf1d707800 (LWP 14299))]
Thread 5 (Thread 0x7fcf00b0e700 (LWP 14313)):
#0 0x7fcf1d094293 in select () at ../sysdeps/unix/syscall-template.S:81
#1 0x7fcf1aec5179 in qt_safe_select(int, fd_set*, fd_set*, fd_set*,
timespec const*) (nfds=16, fdread=0x7fcef8000a78, fdwrite=0x7fcef8000d08,
fdexcept=0x7fcef8000f98, orig_timeout=0x0) at kernel/qcore_unix.cpp:75
#2 0x7fcf1aec6af5 in
QEventDispatcherUNIXPrivate::doSelect(QFlags,
timespec*) (this=this@entry=0x7fcef80008e0, flags=..., flags@entry=...,
timeout=0x0) at kernel/qeventdispatcher_unix.cpp:196
#3 0x7fcf1aec6f3b in
QEventDispatcherUNIX::processEvents(QFlags)
(this=0x7fcef80008c0, flags=...) at kernel/qeventdispatcher_unix.cpp:607
#4 0x7fcf1ae6fd53 in
QEventLoop::exec(QFlags)
(this=this@entry=0x7fcf00b0ddb0, flags=..., flags@entry=...) at
kernel/qeventloop.cpp:204
#5 0x7fcf1ac9161a in QThread::exec() (this=this@entry=0xfb7350) at
thread/qthread.cpp:503
#6 0x7fcf15193e18 in QQmlThreadPrivate::run() (this=0xfb7350) at
/usr/src/debug/qtdeclarative-opensource-src-5.5.1/src/qml/qml/ftw/qqmlthread.cpp:141
#7 0x7fcf1ac9632f in QThreadPrivate::start(void*) (arg=0xfb7350) at
thread/qthread_unix.cpp:331
#8 0x7fcf1c6c70a4 in start_thread (arg=0x7fcf00b0e700) at
pthread_create.c:309
#9 0x7fcf1d09b02d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:111
Thread 4 (Thread 0x7fcef25aa700 (LWP 14315)):
#0 0x7fcf1c6cb03f in pthread_cond_wait@@GLIBC_2.3.2 () at
../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1 0x7fcf19c1986b in QTWTF::TCMalloc_PageHeap::scavengerThread()
(this=0x7fcf19f00ea0 ) at
../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2 0x7fcf19c19899 in QTWTF::TCMalloc_PageHeap::runScavengerThread(void*)
(context=) at
../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3 0x7fcf1c6c70a4 in start_thread (arg=0x7fcef25aa700) at
pthread_create.c:309
#4 0x7fcf1d09b02d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:111
Thread 3 (Thread 0x7fcef1374700 (LWP 24581)):
#0 0x7fcf1c6cb3e8 in pthread_cond_timedwait@@GLIBC_2.3.2 () at
../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1 0x7fcf1ac97298 in QWaitCondition::wait(QMutex*, unsigned long)
(time=3, this=0x188bab0) at thread/qwaitcondition_unix.cpp:126
#2 0x7fcf1ac97298 in QWaitCondition::wait(QMutex*, unsigned long)
(time=3, this=0x188bab0) at thread/qwaitcondition_unix.cpp:134
#3 0x7fcf1ac97298 in QWaitCondition::wait(QMutex*, unsigned long)
(this=this@entry=0x181c950, mutex=mutex@entry=0xe30df0, time=3) at
thread/qwaitcondition_unix.cpp:208
#4 0x7fcf1ac934e6 in QThreadPoolThread::run() (this=0x181c940) at
thread/qthreadpool.cpp:127
#5 0x7fcf1ac9632f in QThreadPrivate::start(void*) (arg=0x181c940) at
thread/qthread_unix.cpp:331
#6 0x7fcf1c6c70a4 in start_thread (arg=0x7fcef1374700) at
pthread_create.c:309
#7 0x7fcf1d09b02d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:111
Thread 2 (Thread 0x7fcf01af2700 (LWP 24582)):
#0 0x7fcf1c6cb3e8 in pthread_cond_timedwait@@GLIBC_2.3.2 () at
../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1 0x7fcf1ac97298 in QWaitCondition::wait(QMutex*, unsigned long)
(time=3, this=0xe31050) at thread/qwaitcondition_unix.cpp:126
#2 0x7fcf1ac97298 in QWaitCondition::wait(QMutex*, unsigned long)
(time=3, this=0xe31050) at thread/qwaitcondition_unix.cpp:134
#3 0x7fcf1ac97298 in QWaitCondition::wait(QMutex*, unsigned long)
(this=this@entry=0xe1fb20, mutex=mutex@entry=0xe30df0, time=3) at
thread/qwaitcondition_unix.cpp:208
#4 0x7fcf1ac934e6 in QThreadPoolThread::run() (this=0xe1fb10) at
thread/qthreadpool.cpp:127
#5 0x7fcf1ac9632f in QThreadPrivate::start(void*) (arg=0xe1fb10) at
thread/qthread_unix.cpp:331
#6 0x7fcf1c6c70a4 in start_thread (arg=0x7fcf01af2700) at
pthread_create.c:309
#7 0x7fcf1d09b02d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:111
Thread 1 (Thread 0x7fcf1d707800 (LWP 14299)):
[KCrash Handler]
#6 0x7fcf1cc6facd in KWin::SceneOpenGLShadow::~SceneOpenGLShadow()
(this=0x1999890, __in_chrg=) at
/usr/src/debug/kwin-5.5.5/scene_opengl.cpp:2210
#7 0x7fcf1cc6fb89 in KWin::SceneOpenGLShadow::~SceneOpenGLShadow()
(this=0x1999890, __in_chrg=) at
/usr/src/debug/kwin-5.5.5/scene_opengl.cpp:2213
#8 0x7fcf1aea2b18 in QObject::event(QEvent*) (this=0x1999890, e=) at kernel/qobject.cpp:1230
#9 0x7fcf1bb55e7c in QApplicationPrivate::notify_helper(QObject*, QEvent*)
(this=this@entry=0xcfb910, receiver=receiver@entry=0x1999890,
e=e@entry=0x19996d0) at kernel/qapplication.cpp:3716
#10 0x7fcf1bb5acc8 in QApplication::notify(QOb
