Bug 354790

Application: plasmashell (5.4.2)

Qt Version: 5.4.2
Operating System: Linux 4.2.4-040204-lowlatency x86_64
Distribution: Ubuntu 15.10

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

I was trying to adjust systray settings to display/hide some mini-icons.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f3fe8ec1800 (LWP 1915))]

Thread 7 (Thread 0x7f3fd452e700 (LWP 1921)):
#0  0x00007f3fe367d8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f3fe76c4bd2 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f3fe76c674f in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f3fd6878a39 in QXcbEventReader::run() (this=0xb698e0) at qxcbconnection.cpp:1105
#4  0x00007f3fe3d702be in QThreadPrivate::start(void*) (arg=0xb698e0) at thread/qthread_unix.cpp:337
#5  0x00007f3fe2e5f6aa in start_thread (arg=0x7f3fd452e700) at pthread_create.c:333
#6  0x00007f3fe3688eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f3fc66e1700 (LWP 2717)):
#0  0x00007f3fe046f884 in g_mutex_unlock (mutex=0x7f3fb8000990) at /build/glib2.0-ajuDY6/glib2.0-2.46.1/./glib/gthread-posix.c:1350
#1  0x00007f3fe042a770 in g_main_context_prepare (context=context@entry=0x7f3fb8000990, priority=priority@entry=0x7f3fc66e0c70) at /build/glib2.0-ajuDY6/glib2.0-2.46.1/./glib/gmain.c:3440
#2  0x00007f3fe042b11b in g_main_context_iterate (context=context@entry=0x7f3fb8000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-ajuDY6/glib2.0-2.46.1/./glib/gmain.c:3820
#3  0x00007f3fe042b2fc in g_main_context_iteration (context=0x7f3fb8000990, may_block=may_block@entry=1) at /build/glib2.0-ajuDY6/glib2.0-2.46.1/./glib/gmain.c:3901
#4  0x00007f3fe3fa729b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f3fb80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f3fe3f4d75a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f3fc66e0da0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f3fe3d6b3d4 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f3fe6593f85 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f3fe3d702be in QThreadPrivate::start(void*) (arg=0xdb3e60) at thread/qthread_unix.cpp:337
#9  0x00007f3fe2e5f6aa in start_thread (arg=0x7f3fc66e1700) at pthread_create.c:333
#10 0x00007f3fe3688eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f3fb6fe6700 (LWP 2718)):
#0  0x00007f3fe367d8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f3fe042b1ec in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7f3fb0003270, timeout=<optimized out>, context=0x7f3fb0000990) at /build/glib2.0-ajuDY6/glib2.0-2.46.1/./glib/gmain.c:4135
#2  0x00007f3fe042b1ec in g_main_context_iterate (context=context@entry=0x7f3fb0000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-ajuDY6/glib2.0-2.46.1/./glib/gmain.c:3835
#3  0x00007f3fe042b2fc in g_main_context_iteration (context=0x7f3fb0000990, may_block=may_block@entry=1) at /build/glib2.0-ajuDY6/glib2.0-2.46.1/./glib/gmain.c:3901
#4  0x00007f3fe3fa729b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f3fb00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f3fe3f4d75a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f3fb6fe5da0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f3fe3d6b3d4 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f3fe6593f85 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f3fe3d702be in QThreadPrivate::start(void*) (arg=0x10977d0) at thread/qthread_unix.cpp:337
#9  0x00007f3fe2e5f6aa in start_thread (arg=0x7f3fb6fe6700) at pthread_create.c:333
#10 0x00007f3fe3688eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f3fb4f6e700 (LWP 2721)):
#0  0x00007f3fe367d8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f3fe042b1ec in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7f3fa8002e70, timeout=<optimized out>, context=0x7f3fa8000990) at /build/glib2.0-ajuDY6/glib2.0-2.46.1/./glib/gmain.c:4135
#2  0x00007f3fe042b1ec in g_main_context_iterate (context=context@entry=0x7f3fa8000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-ajuDY6/glib2.0-2.46.1/./glib/gmain.c:3835
#3  0x00007f3fe042b2fc in g_main_context_iteration (context=0x7f3fa8000990, may_block=may_block@entry=1) at /build/glib2.0-ajuDY6/glib2.0-2.46.1/./glib/gmain.c:3901
#4  0x00007f3fe3fa729b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f3fa80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f3fe3f4d75a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f3fb4f6dda0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f3fe3d6b3d4 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f3fe6593f85 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f3fe3d702be in QThreadPrivate::start(void*) (arg=0x1207f80) at thread/qthread_unix.cpp:337
#9  0x00007f3fe2e5f6aa in start_thread (arg=0x7f3fb4f6e700) at pthread_create.c:333
#10 0x00007f3fe3688eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f3faf5f7700 (LWP 2726)):
#0  0x00007f3fe2e64da0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f3fe891f114 in QTWTF::TCMalloc_PageHeap::scavengerThread() (this=0x7f3fe8a07ee0 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007f3fe891f159 in QTWTF::TCMalloc_PageHeap::runScavengerThread(void*) (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007f3fe2e5f6aa in start_thread (arg=0x7f3faf5f7700) at pthread_create.c:333
#4  0x00007f3fe3688eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f3facdbc700 (LWP 2732)):
#0  0x00007f3fe3d684e5 in QMutex::lock() (currentValue=<synthetic pointer>, newValue=0x1, expectedValue=0x0, _q_value=@0x1449ca8: 0x0) at ../../include/QtCore/../../src/corelib/arch/qatomic_x86.h:259
#1  0x00007f3fe3d684e5 in QMutex::lock() (currentValue=<synthetic pointer>, newValue=<optimized out>, expectedValue=0x0, _q_value=@0x1449ca8: 0x0) at ../../include/QtCore/../../src/corelib/thread/qgenericatomic.h:166
#2  0x00007f3fe3d684e5 in QMutex::lock() (currentValue=<synthetic pointer>, newValue=<optimized out>, expectedValue=0x0, this=0x1449ca8, this@entry=0x29) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:270
#3  0x00007f3fe3d684e5 in QMutex::lock() (current=<synthetic pointer>, this=0x1449ca8, this@entry=0x29) at thread/qmutex.h:82
#4  0x00007f3fe3d684e5 in QMutex::lock() (this=this@entry=0x1449ca8) at thread/qmutex.cpp:212
#5  0x00007f3fe3fa6af9 in postEventSourceCheck(GSource*) (m=0x1449ca8, this=<synthetic pointer>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:128
#6  0x00007f3fe3fa6af9 in postEventSourceCheck(GSource*) (this=0x1449c80) at ../../include/QtCore/5.4.2/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:243
#7  0x00007f3fe3fa6af9 in postEventSourceCheck(GSource*) (timeout=<synthetic pointer>, s=0x7f3f240012d0) at kernel/qeventdispatcher_glib.cpp:254
#8  0x00007f3fe3fa6af9 in postEventSourceCheck(GSource*) (source=0x7f3f240012d0) at kernel/qeventdispatcher_glib.cpp:264
#9  0x00007f3fe042ac21 in g_main_context_check (context=context@entry=0x7f3f24000990, max_priority=2147483647, fds=fds@entry=0x7f3f24003260, n_fds=n_fds@entry=1) at /build/glib2.0-ajuDY6/glib2.0-2.46.1/./glib/gmain.c:3681
#10 0x00007f3fe042b190 in g_main_context_iterate (context=context@entry=0x7f3f24000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-ajuDY6/glib2.0-2.46.1/./glib/gmain.c:3837
#11 0x00007f3fe042b2fc in g_main_context_iteration (context=0x7f3f24000990, may_block=may_block@entry=1) at /build/glib2.0-ajuDY6/glib2.0-2.46.1/./glib/gmain.c:3901
#12 0x00007f3fe3fa729b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f3f240008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#13 0x00007f3fe3f4d75a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f3facdbbd50, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#14 0x00007f3fe3d6b3d4 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:503
#15 0x00007f3fe6f0fef6 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#16 0x00007f3fe3d702be in QThreadPrivate::start(void*) (arg=0x1449f50) at thread/qthread_unix.cpp:337
#17 0x00007f3fe2e5f6aa in start_thread (arg=0x7f3facdbc700) at pthread_create.c:333
#18 0x00007f3fe3688eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f3fe8ec1800 (LWP 1915)):
[KCrash Handler]
#6  0x00007f3fe647387d in QV4::WeakValue::markOnce(QV4::ExecutionEngine*) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f3fe64d8004 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f3fe64d800f in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f3fe64d833b in QV4::QObjectWrapper::markObjects(QV4::Managed*, QV4::ExecutionEngine*) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007f3fe647c209 in QV4::MemoryManager::mark() () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#11 0x00007f3fe647cb88 in QV4::MemoryManager::runGC() () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#12 0x00007f3fe647da63 in QV4::MemoryManager::allocData(unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#13 0x00007f3fe646a945 in QV4::ExecutionEngine::newString(QString const&) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#14 0x00007f3fe65960b0 in QV8Engine::fromVariant(QVariant const&) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#15 0x00007f3fe64df39c in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#16 0x00007f3fe64dfa25 in QV4::QObjectWrapper::getProperty(QObject*, QV4::ExecutionContext*, QQmlPropertyData*, bool) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#17 0x00007f3fe64e056f in QV4::QObjectWrapper::getQmlProperty(QV4::ExecutionContext*, QQmlContextData*, QV4::String*, QV4::QObjectWrapper::RevisionMode, bool*, bool) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#18 0x00007f3fe64e0a11 in QV4::QObjectWrapper::get(QV4::Managed*, QV4::String*, bool*) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#19 0x00007f3fe64e8fe3 in QV4::Runtime::getElement(QV4::ExecutionContext*, QV4::ValueRef, QV4::ValueRef) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#20 0x00007f3fb40642af in  ()
#21 0x0000000000000000 in  ()

Reported using DrKonqi