Bug 355728

Application: plasmashell (5.4.2)

Qt Version: 5.5.0
Operating System: Linux 4.1.12-1-default x86_64
Distribution (Platform): openSUSE RPMs

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

Tray to close Kate, while some files not saved.
Notification about not saved files and changed by other programs files appears.
Plasma restarted.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f621b9077c0 (LWP 12298))]

Thread 8 (Thread 0x7f62053f5700 (LWP 12300)):
#0  0x00007f6214e75c1d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f6219d7b422 in poll (__timeout=-1, __nfds=1, __fds=0x7f62053f4d00) at /usr/include/bits/poll2.h:46
#2  _xcb_conn_wait (c=c@entry=0x1ba67a0, cond=cond@entry=0x1ba67e0, vector=vector@entry=0x0, count=count@entry=0x0) at xcb_conn.c:459
#3  0x00007f6219d7d00f in xcb_wait_for_event (c=0x1ba67a0) at xcb_in.c:693
#4  0x00007f6207545c29 in QXcbEventReader::run (this=0x1bb4d30) at qxcbconnection.cpp:1214
#5  0x00007f621556c55f in QThreadPrivate::start (arg=0x1bb4d30) at thread/qthread_unix.cpp:331
#6  0x00007f621467f0a4 in start_thread (arg=0x7f62053f5700) at pthread_create.c:309
#7  0x00007f6214e7e04d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 7 (Thread 0x7f61feb7a700 (LWP 12301)):
#0  0x00007f6214e75c1d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f6211566e64 in g_main_context_poll (priority=2147483647, n_fds=1, fds=0x7f61f8003070, timeout=-1, context=0x7f61f8000990) at gmain.c:4103
#2  g_main_context_iterate (context=context@entry=0x7f61f8000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3803
#3  0x00007f6211566f7c in g_main_context_iteration (context=0x7f61f8000990, may_block=1) at gmain.c:3869
#4  0x00007f621579da5b in QEventDispatcherGlib::processEvents (this=0x7f61f80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f6215744a63 in QEventLoop::exec (this=this@entry=0x7f61feb79df0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f621556784a in QThread::exec (this=this@entry=0x1c84760) at thread/qthread.cpp:503
#7  0x00007f62188375f8 in QQmlThreadPrivate::run (this=0x1c84760) at /usr/src/debug/qtdeclarative-opensource-src-5.5.0/src/qml/qml/ftw/qqmlthread.cpp:141
#8  0x00007f621556c55f in QThreadPrivate::start (arg=0x1c84760) at thread/qthread_unix.cpp:331
#9  0x00007f621467f0a4 in start_thread (arg=0x7f61feb7a700) at pthread_create.c:309
#10 0x00007f6214e7e04d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 6 (Thread 0x7f61eb6f0700 (LWP 12307)):
#0  g_mutex_unlock (mutex=0x7f61e4000990) at gthread-posix.c:1348
#1  0x00007f6211566759 in g_main_context_query (context=context@entry=0x7f61e4000990, max_priority=2147483647, timeout=timeout@entry=0x7f61eb6efcbc, fds=fds@entry=0x7f61e4002e70, n_fds=n_fds@entry=1) at gmain.c:3557
#2  0x00007f6211566dcf in g_main_context_iterate (context=context@entry=0x7f61e4000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3790
#3  0x00007f6211566f7c in g_main_context_iteration (context=0x7f61e4000990, may_block=1) at gmain.c:3869
#4  0x00007f621579da5b in QEventDispatcherGlib::processEvents (this=0x7f61e40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f6215744a63 in QEventLoop::exec (this=this@entry=0x7f61eb6efdf0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f621556784a in QThread::exec (this=this@entry=0x1d9b480) at thread/qthread.cpp:503
#7  0x00007f62188375f8 in QQmlThreadPrivate::run (this=0x1d9b480) at /usr/src/debug/qtdeclarative-opensource-src-5.5.0/src/qml/qml/ftw/qqmlthread.cpp:141
#8  0x00007f621556c55f in QThreadPrivate::start (arg=0x1d9b480) at thread/qthread_unix.cpp:331
#9  0x00007f621467f0a4 in start_thread (arg=0x7f61eb6f0700) at pthread_create.c:309
#10 0x00007f6214e7e04d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 5 (Thread 0x7f61e9d14700 (LWP 12310)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f621afdf7eb in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7f621b2c6ea0 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007f621afdf819 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007f621467f0a4 in start_thread (arg=0x7f61e9d14700) at pthread_create.c:309
#4  0x00007f6214e7e04d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7f61e8d49700 (LWP 12311)):
#0  g_main_context_prepare (context=context@entry=0x7f615c000990, priority=priority@entry=0x7f61e8d48cb8) at gmain.c:3480
#1  0x00007f6211566d80 in g_main_context_iterate (context=context@entry=0x7f615c000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3788
#2  0x00007f6211566f7c in g_main_context_iteration (context=0x7f615c000990, may_block=1) at gmain.c:3869
#3  0x00007f621579da5b in QEventDispatcherGlib::processEvents (this=0x7f615c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f6215744a63 in QEventLoop::exec (this=this@entry=0x7f61e8d48df0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f621556784a in QThread::exec (this=this@entry=0x1ea52f0) at thread/qthread.cpp:503
#6  0x00007f62188375f8 in QQmlThreadPrivate::run (this=0x1ea52f0) at /usr/src/debug/qtdeclarative-opensource-src-5.5.0/src/qml/qml/ftw/qqmlthread.cpp:141
#7  0x00007f621556c55f in QThreadPrivate::start (arg=0x1ea52f0) at thread/qthread_unix.cpp:331
#8  0x00007f621467f0a4 in start_thread (arg=0x7f61e8d49700) at pthread_create.c:309
#9  0x00007f6214e7e04d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7f616111d700 (LWP 12312)):
#0  0x00007f6214e75c1d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f6211566e64 in g_main_context_poll (priority=2147483647, n_fds=1, fds=0x7f6158003120, timeout=-1, context=0x7f6158000990) at gmain.c:4103
#2  g_main_context_iterate (context=context@entry=0x7f6158000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3803
#3  0x00007f6211566f7c in g_main_context_iteration (context=0x7f6158000990, may_block=1) at gmain.c:3869
#4  0x00007f621579da5b in QEventDispatcherGlib::processEvents (this=0x7f61580008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f6215744a63 in QEventLoop::exec (this=this@entry=0x7f616111cdb0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f621556784a in QThread::exec (this=this@entry=0x2066590) at thread/qthread.cpp:503
#7  0x00007f62193c3f82 in QQuickPixmapReader::run (this=0x2066590) at /usr/src/debug/qtdeclarative-opensource-src-5.5.0/src/quick/util/qquickpixmapcache.cpp:754
#8  0x00007f621556c55f in QThreadPrivate::start (arg=0x2066590) at thread/qthread_unix.cpp:331
#9  0x00007f621467f0a4 in start_thread (arg=0x7f616111d700) at pthread_create.c:309
#10 0x00007f6214e7e04d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7f614c36f700 (LWP 12323)):
#0  g_main_context_prepare (context=context@entry=0x7f6144000990, priority=priority@entry=0x7f614c36ec98) at gmain.c:3410
#1  0x00007f6211566d80 in g_main_context_iterate (context=context@entry=0x7f6144000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3788
#2  0x00007f6211566f7c in g_main_context_iteration (context=0x7f6144000990, may_block=1) at gmain.c:3869
#3  0x00007f621579da5b in QEventDispatcherGlib::processEvents (this=0x7f61440008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f6215744a63 in QEventLoop::exec (this=this@entry=0x7f614c36edd0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f621556784a in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f614d9bcb77 in KCupsConnection::run() () from /usr/lib64/libkcupslib.so
#7  0x00007f621556c55f in QThreadPrivate::start (arg=0x2f2ffe0) at thread/qthread_unix.cpp:331
#8  0x00007f621467f0a4 in start_thread (arg=0x7f614c36f700) at pthread_create.c:309
#9  0x00007f6214e7e04d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f621b9077c0 (LWP 12298)):
[KCrash Handler]
#6  ref<int> (_q_value=@0xa1: <error reading variable>) at ../../src/corelib/arch/qatomic_x86.h:181
#7  ref (this=0xa1) at ../../src/corelib/thread/qbasicatomic.h:129
#8  QtSharedPointer::ExternalRefCountData::getAndRef (obj=obj@entry=0x33b1b50) at tools/qsharedpointer.cpp:1332
#9  0x00007f62187762a2 in QWeakPointer<QObject> (ptr=0x33b1b50, this=0x7f613f148e18) at /usr/include/qt5/QtCore/qsharedpointer_impl.h:696
#10 QPointer (p=0x33b1b50, this=0x7f613f148e18) at /usr/include/qt5/QtCore/qpointer.h:62
#11 QObjectWrapper (object=0x33b1b50, engine=0x1ed8df0, this=0x7f613f148df0) at /usr/src/debug/qtdeclarative-opensource-src-5.5.0/src/qml/jsruntime/qv4qobjectwrapper.cpp:237
#12 alloc<QV4::QObjectWrapper, QV4::ExecutionEngine*, QObject*> (arg1=0x1ed8df0, arg1=0x1ed8df0, arg2=0x33b1b50, this=<optimized out>) at /usr/src/debug/qtdeclarative-opensource-src-5.5.0/src/qml/jsruntime/qv4mm_p.h:117
#13 QV4::QObjectWrapper::create (engine=engine@entry=0x1ed8df0, object=object@entry=0x33b1b50) at /usr/src/debug/qtdeclarative-opensource-src-5.5.0/src/qml/jsruntime/qv4qobjectwrapper.cpp:689
#14 0x00007f6218777815 in QV4::QObjectWrapper::wrap (engine=engine@entry=0x1ed8df0, object=0x33b1b50) at /usr/src/debug/qtdeclarative-opensource-src-5.5.0/src/qml/jsruntime/qv4qobjectwrapper.cpp:594
#15 0x00007f62186f8a2c in QV4::ExecutionEngine::fromVariant (this=this@entry=0x1ed8df0, variant=...) at /usr/src/debug/qtdeclarative-opensource-src-5.5.0/src/qml/jsruntime/qv4engine.cpp:1418
#16 0x00007f6218828061 in QV4::QmlContextWrapper::get (m=<optimized out>, name=<optimized out>, hasProperty=<optimized out>) at /usr/src/debug/qtdeclarative-opensource-src-5.5.0/src/qml/qml/qqmlcontextwrapper.cpp:232
#17 0x00007f6218700e29 in get (hasProperty=0x7ffe9724b230, name=0x7f61638010e0, this=<optimized out>) at /usr/src/debug/qtdeclarative-opensource-src-5.5.0/src/qml/jsruntime/qv4object_p.h:276
#18 QV4::ExecutionContext::getProperty (this=0x7f61638010e8, name=0x7f61638010e0) at /usr/src/debug/qtdeclarative-opensource-src-5.5.0/src/qml/jsruntime/qv4context.cpp:383
#19 0x00007f621878eb87 in QV4::Runtime::getActivationProperty (engine=0x1ed8df0, nameIndex=<optimized out>) at /usr/src/debug/qtdeclarative-opensource-src-5.5.0/src/qml/jsruntime/qv4runtime.cpp:690
#20 0x00007f61615d07cd in ?? ()
#21 0x0000000001ba53e0 in ?? ()
#22 0x0000000000000000 in ?? ()

Reported using DrKonqi