Bug 391184

Summary: Hit Alt-F2 repeatedly to open KRunner and it crashed
Product: [Plasma] krunner Reporter: swagfortress
Component: generalAssignee: Kai Uwe Broulik <kde>
Status: RESOLVED WORKSFORME    
Severity: crash CC: stefan.bruens
Priority: NOR Keywords: drkonqi, triaged
Version First Reported In: 5.12.1   
Target Milestone: ---   
Platform: Neon   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description swagfortress 2018-02-27 22:35:38 UTC 
Application: krunner (5.12.1)

Qt Version: 5.9.3
Frameworks Version: 5.43.0
Operating System: Linux 4.13.0-32-generic x86_64
Distribution: KDE neon LTS User Edition 5.12

-- Information about the crash:
- What I was doing when the application crashed:
I had a lot of windows open in multiple activities I was using most of my RAM at the time.
- Unusual behavior I noticed:
The KRunner window took a long time to open, and then when I started to type in it, it crashed.

-- Backtrace:
Application: krunner (krunner), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
[Current thread is 1 (Thread 0x7f360d1588c0 (LWP 1736))]

Thread 12 (Thread 0x7f35c5ffb700 (LWP 21038)):
#0  0x00007f3608b6930d in nanosleep () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f3608b9ad94 in usleep (useconds=<optimized out>) at ../sysdeps/posix/usleep.c:32
#2  0x00007f35d8986cca in ?? () from /usr/lib/x86_64-linux-gnu/libsqlite3.so.0
#3  0x00007f35d89b99a9 in ?? () from /usr/lib/x86_64-linux-gnu/libsqlite3.so.0
#4  0x00007f35d89c0972 in ?? () from /usr/lib/x86_64-linux-gnu/libsqlite3.so.0
#5  0x00007f35d89c4201 in ?? () from /usr/lib/x86_64-linux-gnu/libsqlite3.so.0
#6  0x00007f35d8a041fa in ?? () from /usr/lib/x86_64-linux-gnu/libsqlite3.so.0
#7  0x00007f35d8a0440a in ?? () from /usr/lib/x86_64-linux-gnu/libsqlite3.so.0
#8  0x00007f35d8a049f2 in ?? () from /usr/lib/x86_64-linux-gnu/libsqlite3.so.0
#9  0x00007f35d8c4c675 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/sqldrivers/libqsqlite.so
#10 0x00007f36046401d8 in QSqlResult::savePrepare(QString const&) () from /usr/lib/x86_64-linux-gnu/libQt5Sql.so.5
#11 0x00007f3604630675 in QSqlQuery::prepare(QString const&) () from /usr/lib/x86_64-linux-gnu/libQt5Sql.so.5
#12 0x00007f35d8e62df0 in FetchSqlite::query (this=0x3943cb0, sql=..., bindObjects=...) at /workspace/build/runners/bookmarks/fetchsqlite.cpp:74
#13 0x00007f35d8e6a2e3 in std::__atomic_base<int>::load (__m=std::memory_order_relaxed, this=0x7f35a8023f90) at /usr/include/c++/5/bits/atomic_base.h:396
#14 QAtomicOps<int>::load<int> (_q_value=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qatomic_cxx11.h:227
#15 QBasicAtomicInteger<int>::load (this=0x7f35a8023f90) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qbasicatomic.h:102
#16 QtPrivate::RefCount::deref (this=0x7f35a8023f90) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qrefcount.h:66
#17 QString::~QString (this=0x7f35c5ffaa30, __in_chrg=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qstring.h:1084
#18 Firefox::prepare (this=0x7f35c5ffab20) at /workspace/build/runners/bookmarks/browsers/firefox.cpp:59
#19 0x0000000000000000 in ?? ()

Thread 11 (Thread 0x7f35c67fc700 (LWP 21037)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f360929665b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x1ae3eb0) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1ae1d10, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f35e1abda8b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked (this=this@entry=0x1ae28e0, th=<optimized out>) at /workspace/build/src/weaver.cpp:594
#4  0x00007f35e1abe80f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait (this=0x1ae28e0, th=th@entry=0x7f35c8002d90, threadWasBusy=threadWasBusy@entry=true, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at /workspace/build/src/weaver.cpp:554
#5  0x00007f35e1ac28e8 in ThreadWeaver::WorkingHardState::applyForWork (this=0x1ae40c0, th=0x7f35c8002d90, wasBusy=<optimized out>) at /workspace/build/src/workinghardstate.cpp:66
#6  0x00007f35e1abd9ed in ThreadWeaver::Weaver::applyForWork (this=<optimized out>, th=0x7f35c8002d90, wasBusy=<optimized out>) at /workspace/build/src/weaver.cpp:568
#7  0x00007f35e1ac0460 in ThreadWeaver::Thread::run (this=0x7f35c8002d90) at /workspace/build/src/thread.cpp:103
#8  0x00007f3609295709 in QThreadPrivate::start (arg=0x7f35c8002d90) at thread/qthread_unix.cpp:368
#9  0x00007f3606b736ba in start_thread (arg=0x7f35c67fc700) at pthread_create.c:333
#10 0x00007f3608ba441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7f35c6ffd700 (LWP 21036)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f360929665b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x1ae3eb0) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1ae1d10, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f35e1abda8b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked (this=this@entry=0x1ae28e0, th=<optimized out>) at /workspace/build/src/weaver.cpp:594
#4  0x00007f35e1abe80f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait (this=0x1ae28e0, th=th@entry=0x7f35c0002f90, threadWasBusy=threadWasBusy@entry=true, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at /workspace/build/src/weaver.cpp:554
#5  0x00007f35e1ac28e8 in ThreadWeaver::WorkingHardState::applyForWork (this=0x1ae40c0, th=0x7f35c0002f90, wasBusy=<optimized out>) at /workspace/build/src/workinghardstate.cpp:66
#6  0x00007f35e1abd9ed in ThreadWeaver::Weaver::applyForWork (this=<optimized out>, th=0x7f35c0002f90, wasBusy=<optimized out>) at /workspace/build/src/weaver.cpp:568
#7  0x00007f35e1ac0460 in ThreadWeaver::Thread::run (this=0x7f35c0002f90) at /workspace/build/src/thread.cpp:103
#8  0x00007f3609295709 in QThreadPrivate::start (arg=0x7f35c0002f90) at thread/qthread_unix.cpp:368
#9  0x00007f3606b736ba in start_thread (arg=0x7f35c6ffd700) at pthread_create.c:333
#10 0x00007f3608ba441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7f35bffff700 (LWP 21035)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f360929665b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x1ae3eb0) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1ae1d10, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f35e1abda8b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked (this=this@entry=0x1ae28e0, th=<optimized out>) at /workspace/build/src/weaver.cpp:594
#4  0x00007f35e1abe80f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait (this=0x1ae28e0, th=th@entry=0x7f35d0003450, threadWasBusy=threadWasBusy@entry=true, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at /workspace/build/src/weaver.cpp:554
#5  0x00007f35e1ac28e8 in ThreadWeaver::WorkingHardState::applyForWork (this=0x1ae40c0, th=0x7f35d0003450, wasBusy=<optimized out>) at /workspace/build/src/workinghardstate.cpp:66
#6  0x00007f35e1abd9ed in ThreadWeaver::Weaver::applyForWork (this=<optimized out>, th=0x7f35d0003450, wasBusy=<optimized out>) at /workspace/build/src/weaver.cpp:568
#7  0x00007f35e1ac0460 in ThreadWeaver::Thread::run (this=0x7f35d0003450) at /workspace/build/src/thread.cpp:103
#8  0x00007f3609295709 in QThreadPrivate::start (arg=0x7f35d0003450) at thread/qthread_unix.cpp:368
#9  0x00007f3606b736ba in start_thread (arg=0x7f35bffff700) at pthread_create.c:333
#10 0x00007f3608ba441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f35c77fe700 (LWP 21034)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f360929665b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x1ae3eb0) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1ae1d10, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f35e1abda8b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked (this=this@entry=0x1ae28e0, th=<optimized out>) at /workspace/build/src/weaver.cpp:594
#4  0x00007f35e1abe80f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait (this=0x1ae28e0, th=th@entry=0x1ad5a80, threadWasBusy=threadWasBusy@entry=true, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at /workspace/build/src/weaver.cpp:554
#5  0x00007f35e1ac28e8 in ThreadWeaver::WorkingHardState::applyForWork (this=0x1ae40c0, th=0x1ad5a80, wasBusy=<optimized out>) at /workspace/build/src/workinghardstate.cpp:66
#6  0x00007f35e1abd9ed in ThreadWeaver::Weaver::applyForWork (this=<optimized out>, th=0x1ad5a80, wasBusy=<optimized out>) at /workspace/build/src/weaver.cpp:568
#7  0x00007f35e1ac0460 in ThreadWeaver::Thread::run (this=0x1ad5a80) at /workspace/build/src/thread.cpp:103
#8  0x00007f3609295709 in QThreadPrivate::start (arg=0x1ad5a80) at thread/qthread_unix.cpp:368
#9  0x00007f3606b736ba in start_thread (arg=0x7f35c77fe700) at pthread_create.c:333
#10 0x00007f3608ba441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f35c7fff700 (LWP 21033)):
[KCrash Handler]
#6  QJsonPrivate::Entry::operator>= (this=0x7f35c077191a, key=...) at json/qjson_p.h:748
#7  QJsonPrivate::Object::indexOf (this=0x7f35c00118a8, key=..., exists=exists@entry=0x7f35c7ffe017) at json/qjson.cpp:213
#8  0x00007f3609446b95 in QJsonObject::value (this=this@entry=0x7f35cc011318, key=...) at json/qjsonobject.cpp:387
#9  0x00007f36094627f2 in QLibraryPrivate::updatePluginState (this=0x7f35cc0112e0) at plugin/qlibrary.cpp:742
#10 0x00007f36094532d6 in QPluginLoader::setFileName (this=this@entry=0x7f35c7ffe360, fileName=...) at plugin/qpluginloader.cpp:364
#11 0x00007f36094533a9 in QPluginLoader::QPluginLoader (this=0x7f35c7ffe360, fileName=..., parent=<optimized out>) at plugin/qpluginloader.cpp:156
#12 0x00007f360a0bdb65 in KPluginMetaData::KPluginMetaData (this=0x7f35c7ffe3d0, file=...) at /workspace/build/src/lib/plugin/kpluginmetadata.cpp:82
#13 0x00007f360a0b8e24 in KPluginLoader::<lambda(const QString&)>::operator() (pluginPath=..., __closure=0x7f35c7ffe520) at /workspace/build/src/lib/plugin/kpluginloader.cpp:267
#14 std::_Function_handler<void(const QString&), KPluginLoader::findPlugins(const QString&, std::function<bool(const KPluginMetaData&)>)::<lambda(const QString&)> >::_M_invoke(const std::_Any_data &, const QString &) (__functor=..., __args#0=...) at /usr/include/c++/5/functional:1871
#15 0x00007f360a0b8837 in std::function<void (QString const&)>::operator()(QString const&) const (__args#0=..., this=0x7f35c7ffe520) at /usr/include/c++/5/functional:2267
#16 KPluginLoader::forEachPlugin(QString const&, std::function<void (QString const&)>) (directory=..., callback=...) at /workspace/build/src/lib/plugin/kpluginloader.cpp:257
#17 0x00007f360a0b8cf4 in KPluginLoader::findPlugins(QString const&, std::function<bool (KPluginMetaData const&)>) (directory=..., filter=...) at /workspace/build/src/lib/plugin/kpluginloader.cpp:275
#18 0x00007f360b92cbd7 in KPackage::PackageLoader::loadPackageStructure (this=this@entry=0x1a2e640, packageFormat=...) at /workspace/build/src/kpackage/packageloader.cpp:343
#19 0x00007f360b92ee8c in KPackage::PackageLoader::listPackages (this=0x1a2e640, packageFormat=..., packageRoot=...) at /workspace/build/src/kpackage/packageloader.cpp:200
#20 0x00007f360b92f342 in KPackage::PackageLoader::findPackages(QString const&, QString const&, std::function<bool (KPluginMetaData const&)>) (this=<optimized out>, packageFormat=..., packageRoot=..., filter=...) at /workspace/build/src/kpackage/packageloader.cpp:286
#21 0x00007f3608811679 in Plasma::PluginLoader::listAppletMetaData (this=<optimized out>, category=..., parentApp=...) at /workspace/build/src/plasma/pluginloader.cpp:521
#22 0x00007f35dbdf7d86 in WindowedWidgetsRunner::match (this=0x38bee60, context=...) at /workspace/build/runners/windowedwidgets/windowedwidgetsrunner.cpp:63
#23 0x00007f35e1ce4768 in Plasma::AbstractRunner::performMatch (this=0x38bee60, localContext=...) at /workspace/build/src/abstractrunner.cpp:130
#24 0x00007f35e1ac2097 in ThreadWeaver::Executor::run (this=<optimized out>, job=..., thread=<optimized out>) at /workspace/build/src/executor.cpp:52
#25 0x00007f35e1ac0bc0 in ThreadWeaver::Job::execute (this=<optimized out>, self=..., th=0x7f35d0002d90) at /workspace/build/src/job.cpp:83
#26 0x00007f35e1ac03b0 in ThreadWeaver::Thread::run (this=0x7f35d0002d90) at /workspace/build/src/thread.cpp:114
#27 0x00007f3609295709 in QThreadPrivate::start (arg=0x7f35d0002d90) at thread/qthread_unix.cpp:368
#28 0x00007f3606b736ba in start_thread (arg=0x7f35c7fff700) at pthread_create.c:333
#29 0x00007f3608ba441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f35d4d5b700 (LWP 21032)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f360929665b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x1ae3eb0) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1ae1d10, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f35e1abda8b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked (this=this@entry=0x1ae28e0, th=<optimized out>) at /workspace/build/src/weaver.cpp:594
#4  0x00007f35e1abe80f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait (this=0x1ae28e0, th=th@entry=0x3307fa0, threadWasBusy=threadWasBusy@entry=true, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at /workspace/build/src/weaver.cpp:554
#5  0x00007f35e1ac28e8 in ThreadWeaver::WorkingHardState::applyForWork (this=0x1ae40c0, th=0x3307fa0, wasBusy=<optimized out>) at /workspace/build/src/workinghardstate.cpp:66
#6  0x00007f35e1abd9ed in ThreadWeaver::Weaver::applyForWork (this=<optimized out>, th=0x3307fa0, wasBusy=<optimized out>) at /workspace/build/src/weaver.cpp:568
#7  0x00007f35e1ac0460 in ThreadWeaver::Thread::run (this=0x3307fa0) at /workspace/build/src/thread.cpp:103
#8  0x00007f3609295709 in QThreadPrivate::start (arg=0x3307fa0) at thread/qthread_unix.cpp:368
#9  0x00007f3606b736ba in start_thread (arg=0x7f35d4d5b700) at pthread_create.c:333
#10 0x00007f3608ba441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f35d555c700 (LWP 21031)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f360929665b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x1ae3eb0) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1ae1d10, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f35e1abda8b in ThreadWeaver::Weaver::blockThreadUntilJobsAreBeingAssigned_locked (this=this@entry=0x1ae28e0, th=<optimized out>) at /workspace/build/src/weaver.cpp:594
#4  0x00007f35e1abe80f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait (this=0x1ae28e0, th=th@entry=0x3848fe0, threadWasBusy=threadWasBusy@entry=true, suspendIfInactive=suspendIfInactive@entry=false, justReturning=justReturning@entry=false) at /workspace/build/src/weaver.cpp:554
#5  0x00007f35e1ac28e8 in ThreadWeaver::WorkingHardState::applyForWork (this=0x1ae40c0, th=0x3848fe0, wasBusy=<optimized out>) at /workspace/build/src/workinghardstate.cpp:66
#6  0x00007f35e1abd9ed in ThreadWeaver::Weaver::applyForWork (this=<optimized out>, th=0x3848fe0, wasBusy=<optimized out>) at /workspace/build/src/weaver.cpp:568
#7  0x00007f35e1ac0460 in ThreadWeaver::Thread::run (this=0x3848fe0) at /workspace/build/src/thread.cpp:103
#8  0x00007f3609295709 in QThreadPrivate::start (arg=0x3848fe0) at thread/qthread_unix.cpp:368
#9  0x00007f3606b736ba in start_thread (arg=0x7f35d555c700) at pthread_create.c:333
#10 0x00007f3608ba441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f35ee4a8700 (LWP 1749)):
#0  0x00007f3608b9874d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f36048af38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f36048af49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f36094bf6cb in QEventDispatcherGlib::processEvents (this=0x7f35e40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f3609467e2a in QEventLoop::exec (this=this@entry=0x7f35ee4a7ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f36092908f4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:515
#6  0x00007f360be18d25 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f3609295709 in QThreadPrivate::start (arg=0x1a40ed0) at thread/qthread_unix.cpp:368
#8  0x00007f3606b736ba in start_thread (arg=0x7f35ee4a8700) at pthread_create.c:333
#9  0x00007f3608ba441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f35f4f5e700 (LWP 1748)):
#0  0x00007f3608b9874d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f36048af38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f36048af49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f36094bf6cb in QEventDispatcherGlib::processEvents (this=0x7f35e80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f3609467e2a in QEventLoop::exec (this=this@entry=0x7f35f4f5dcd0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f36092908f4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:515
#6  0x00007f360adbd315 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f3609295709 in QThreadPrivate::start (arg=0x7f360b031d40) at thread/qthread_unix.cpp:368
#8  0x00007f3606b736ba in start_thread (arg=0x7f35f4f5e700) at pthread_create.c:333
#9  0x00007f3608ba441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f35f7397700 (LWP 1747)):
#0  0x00007f3608b9874d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f3607fd2c62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f3607fd48d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f35f96ea1f9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f3609295709 in QThreadPrivate::start (arg=0x17a20e0) at thread/qthread_unix.cpp:368
#5  0x00007f3606b736ba in start_thread (arg=0x7f35f7397700) at pthread_create.c:333
#6  0x00007f3608ba441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f360d1588c0 (LWP 1736)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f3607fd2eb9 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f3607fd4617 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f3607fd4721 in xcb_wait_for_reply () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#4  0x00007f35f970cd5e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#5  0x00007f35f970ceb3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#6  0x00007f3609a675c4 in QCursor::pos(QScreen const*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#7  0x00007f3609a677b1 in QCursor::pos() () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#8  0x00007f35e1f1e059 in Milou::MouseHelper::globalMousePosition() const () from /usr/lib/x86_64-linux-gnu/libmilou.so.5
#9  0x00007f35e1f1e449 in ?? () from /usr/lib/x86_64-linux-gnu/libmilou.so.5
#10 0x00007f35e1f1ee47 in Milou::MouseHelper::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/x86_64-linux-gnu/libmilou.so.5
#11 0x00007f360bdcc539 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#12 0x00007f360bd4c29d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#13 0x00007f360bd4ce3e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#14 0x00007f360bd4dfb0 in QV4::QObjectMethod::callInternal(QV4::CallData*, QV4::Scope&) const () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#15 0x00007f360bd6658e in QV4::Runtime::method_callProperty(QV4::ExecutionEngine*, int, QV4::CallData*) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#16 0x00007f35f401ef6a in ?? ()
#17 0x0000000000000000 in ?? ()

Reported using DrKonqi
Comment 1 Stefan Brüns 2018-09-06 01:37:24 UTC 
Likely fixed with https://phabricator.kde.org/D12683
Comment 2 Christoph Feck 2018-09-27 01:21:58 UTC 
Can you confirm it is fixed in recent KDE neon Plasma versions?
Comment 3 Andrew Crouthamel 2018-10-21 05:04:26 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 2018-11-12 16:04:34 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!