[kde] [Bug 351570] New: Plasma segfault after undocking

Jacob Godserv jacobgodserv at gmail.com
Fri Aug 21 16:02:41 BST 2015 

https://bugs.kde.org/show_bug.cgi?id=351570

            Bug ID: 351570
           Summary: Plasma segfault after undocking
           Product: kde
           Version: unspecified
          Platform: unspecified
                OS: Linux
            Status: UNCONFIRMED
          Keywords: drkonqi
          Severity: crash
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: jacobgodserv at gmail.com

Application: plasmashell (5.3.95)
 (Compiled from sources)
Qt Version: 5.4.2
Operating System: Linux 4.1.0-pf1 x86_64
Distribution: "Funtoo Linux - baselayout 2.2.0"

-- Information about the crash:
- What I was doing when the application crashed:
I removed my Dell laptop from its dock.

- Unusual behavior I noticed:
When redocking, plasma would handle the switch back to a dual-monitor setup
just fine, but it refused to paint any background on the second screen.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f0642db3800 (LWP 12316))]

Thread 7 (Thread 0x7f0642526700 (LWP 12317)):
#0  0x00000036474e0c6d in poll () from /lib64/libc.so.6
#1  0x000000364b40a922 in ?? () from /usr/lib64/libxcb.so.1
#2  0x000000364b40c3bf in xcb_wait_for_event () from /usr/lib64/libxcb.so.1
#3  0x00007f064299f639 in QXcbEventReader::run (this=0x1a89ff0) at
qxcbconnection.cpp:1105
#4  0x000000365469f82f in QThreadPrivate::start (arg=0x1a89ff0) at
thread/qthread_unix.cpp:337
#5  0x0000003647807574 in start_thread () from /lib64/libpthread.so.0
#6  0x00000036474e9add in clone () from /lib64/libc.so.6

Thread 6 (Thread 0x7f063b5ef700 (LWP 12318)):
#0  0x000000364908b5a9 in g_mutex_lock () from /usr/lib64/libglib-2.0.so.0
#1  0x0000003649047d97 in g_main_context_prepare () from
/usr/lib64/libglib-2.0.so.0
#2  0x0000003649048800 in ?? () from /usr/lib64/libglib-2.0.so.0
#3  0x00000036490489dc in g_main_context_iteration () from
/usr/lib64/libglib-2.0.so.0
#4  0x00000036548d3bfc in QEventDispatcherGlib::processEvents
(this=0x7f06340008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x000000365487caa2 in QEventLoop::exec (this=this at entry=0x7f063b5eedb0,
flags=..., flags at entry=...) at kernel/qeventloop.cpp:204
#6  0x000000365469ab4c in QThread::exec (this=this at entry=0x1b51ef0) at
thread/qthread.cpp:503
#7  0x00000036652b5255 in QQmlThreadPrivate::run (this=0x1b51ef0) at
qml/ftw/qqmlthread.cpp:141
#8  0x000000365469f82f in QThreadPrivate::start (arg=0x1b51ef0) at
thread/qthread_unix.cpp:337
#9  0x0000003647807574 in start_thread () from /lib64/libpthread.so.0
#10 0x00000036474e9add in clone () from /lib64/libc.so.6

Thread 5 (Thread 0x7f0632fe6700 (LWP 12356)):
#0  0x0000003649045aae in ?? () from /usr/lib64/libglib-2.0.so.0
#1  0x0000003649047e5b in g_main_context_prepare () from
/usr/lib64/libglib-2.0.so.0
#2  0x0000003649048800 in ?? () from /usr/lib64/libglib-2.0.so.0
#3  0x00000036490489dc in g_main_context_iteration () from
/usr/lib64/libglib-2.0.so.0
#4  0x00000036548d3bfc in QEventDispatcherGlib::processEvents
(this=0x7f062c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x000000365487caa2 in QEventLoop::exec (this=this at entry=0x7f0632fe5db0,
flags=..., flags at entry=...) at kernel/qeventloop.cpp:204
#6  0x000000365469ab4c in QThread::exec (this=this at entry=0x2413c40) at
thread/qthread.cpp:503
#7  0x00000036652b5255 in QQmlThreadPrivate::run (this=0x2413c40) at
qml/ftw/qqmlthread.cpp:141
#8  0x000000365469f82f in QThreadPrivate::start (arg=0x2413c40) at
thread/qthread_unix.cpp:337
#9  0x0000003647807574 in start_thread () from /lib64/libpthread.so.0
#10 0x00000036474e9add in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7f063119f700 (LWP 12360)):
#0  0x000000364908b5a9 in g_mutex_lock () from /usr/lib64/libglib-2.0.so.0
#1  0x00000036490487d5 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00000036490489dc in g_main_context_iteration () from
/usr/lib64/libglib-2.0.so.0
#3  0x00000036548d3bfc in QEventDispatcherGlib::processEvents
(this=0x7f06280008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x000000365487caa2 in QEventLoop::exec (this=this at entry=0x7f063119edb0,
flags=..., flags at entry=...) at kernel/qeventloop.cpp:204
#5  0x000000365469ab4c in QThread::exec (this=this at entry=0x2559c50) at
thread/qthread.cpp:503
#6  0x00000036652b5255 in QQmlThreadPrivate::run (this=0x2559c50) at
qml/ftw/qqmlthread.cpp:141
#7  0x000000365469f82f in QThreadPrivate::start (arg=0x2559c50) at
thread/qthread_unix.cpp:337
#8  0x0000003647807574 in start_thread () from /lib64/libpthread.so.0
#9  0x00000036474e9add in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7f06237bf700 (LWP 12361)):
#0  0x000000364780cadf in pthread_cond_wait@@GLIBC_2.3.2 () from
/lib64/libpthread.so.0
#1  0x00000030a7b797d4 in QTWTF::TCMalloc_PageHeap::scavengerThread
(this=0x30a7e67880) at
../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00000030a7b79819 in QTWTF::TCMalloc_PageHeap::runScavengerThread
(context=<optimized out>) at
../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x0000003647807574 in start_thread () from /lib64/libpthread.so.0
#4  0x00000036474e9add in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f05a0d46700 (LWP 12384)):
#0  0x00000036474e0c6d in poll () from /lib64/libc.so.6
#1  0x00000036490488d4 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00000036490489dc in g_main_context_iteration () from
/usr/lib64/libglib-2.0.so.0
#3  0x00000036548d3bfc in QEventDispatcherGlib::processEvents
(this=0x7f059c00e770, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x000000365487caa2 in QEventLoop::exec (this=this at entry=0x7f05a0d45d70,
flags=..., flags at entry=...) at kernel/qeventloop.cpp:204
#5  0x000000365469ab4c in QThread::exec (this=this at entry=0x3f0f110) at
thread/qthread.cpp:503
#6  0x00000036658fb9e2 in QQuickPixmapReader::run (this=0x3f0f110) at
util/qquickpixmapcache.cpp:714
#7  0x000000365469f82f in QThreadPrivate::start (arg=0x3f0f110) at
thread/qthread_unix.cpp:337
#8  0x0000003647807574 in start_thread () from /lib64/libpthread.so.0
#9  0x00000036474e9add in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f0642db3800 (LWP 12316)):
[KCrash Handler]
#6  inUse (this=0x1) at jsruntime/qv4managed_p.h:342
#7  QV4::MemoryManager::collectFromJSStack (this=this at entry=0x1b3a650) at
jsruntime/qv4mm.cpp:581
#8  0x000000366519c29f in QV4::MemoryManager::mark (this=0x1b3a650) at
jsruntime/qv4mm.cpp:295
#9  0x000000366519cd54 in QV4::MemoryManager::runGC (this=0x1b3a650) at
jsruntime/qv4mm.cpp:458
#10 0x000000366519dbc7 in QV4::MemoryManager::allocData (this=0x1b3a650,
size=112) at jsruntime/qv4mm.cpp:211
#11 0x00000036651a1ce5 in allocManaged (size=<optimized out>, this=<optimized
out>) at jsruntime/qv4mm_p.h:94
#12 QV4::ArrayData::realloc (o=o at entry=0x7f06380b10a0,
newType=newType at entry=QV4::ArrayData::Simple, requested=requested at entry=1,
enforceAttributes=enforceAttributes at entry=false) at
jsruntime/qv4arraydata.cpp:130
#13 0x000000366518bfc7 in arrayReserve (n=1, this=0x7f06380b10a0) at
jsruntime/qv4object_p.h:224
#14 QV4::ExecutionEngine::newArrayObject (this=this at entry=0x2574070,
count=<optimized out>) at jsruntime/qv4engine.cpp:539
#15 0x00000036652b386b in QQmlObjectCreator::create
(this=this at entry=0x7ffe36a66480, subComponentIndex=subComponentIndex at entry=-1,
parent=parent at entry=0x0, interrupt=interrupt at entry=0x0) at
qml/qqmlobjectcreator.cpp:212
#16 0x00000036652b2ddc in QQmlObjectCreator::createInstance
(this=0x7ffe36a67620, index=10, parent=0x4426e50, isContextObject=<optimized
out>) at qml/qqmlobjectcreator.cpp:1091
#17 0x00000036652b0255 in QQmlObjectCreator::setPropertyBinding
(this=0x7ffe36a67620, property=0x7f062802e4e8, binding=0x7f0628621fdc) at
qml/qqmlobjectcreator.cpp:774
#18 0x00000036652b0f9e in QQmlObjectCreator::setupBindings
(this=this at entry=0x7ffe36a67620, bindingsToSkip=...) at
qml/qqmlobjectcreator.cpp:733
#19 0x00000036652b190d in QQmlObjectCreator::populateInstance
(this=this at entry=0x7ffe36a67620, index=9, instance=0x4426e20,
instance at entry=0x4426e50, bindingTarget=0x4426e20,
bindingTarget at entry=0x4426e50, valueTypeProperty=valueTypeProperty at entry=0x0,
bindingsToSkip=...) at qml/qqmlobjectcreator.cpp:1348
#20 0x00000036652b25f3 in QQmlObjectCreator::createInstance (this=<optimized
out>, index=9, parent=<optimized out>, isContextObject=<optimized out>) at
qml/qqmlobjectcreator.cpp:1184
#21 0x00000036652b0255 in QQmlObjectCreator::setPropertyBinding
(this=0x7ffe36a67620, property=0x7f062802e4e8, binding=0x7f0628621e18) at
qml/qqmlobjectcreator.cpp:774
#22 0x00000036652b0f9e in QQmlObjectCreator::setupBindings
(this=this at entry=0x7ffe36a67620, bindingsToSkip=...) at
qml/qqmlobjectcreator.cpp:733
#23 0x00000036652b190d in QQmlObjectCreator::populateInstance
(this=this at entry=0x7ffe36a67620, index=7, instance=0x4425990,
instance at entry=0x4426e20, bindingTarget=0x4425990,
bindingTarget at entry=0x4426e20, valueTypeProperty=valueTypeProperty at entry=0x0,
bindingsToSkip=...) at qml/qqmlobjectcreator.cpp:1348
#24 0x00000036652b25f3 in QQmlObjectCreator::createInstance (this=<optimized
out>, index=7, parent=<optimized out>, isContextObject=<optimized out>) at
qml/qqmlobjectcreator.cpp:1184
#25 0x00000036652b0255 in QQmlObjectCreator::setPropertyBinding
(this=0x7ffe36a67620, property=0x7f062802e4e8, binding=0x7f06286219bc) at
qml/qqmlobjectcreator.cpp:774
#26 0x00000036652b0f9e in QQmlObjectCreator::setupBindings
(this=this at entry=0x7ffe36a67620, bindingsToSkip=...) at
qml/qqmlobjectcreator.cpp:733
#27 0x00000036652b190d in QQmlObjectCreator::populateInstance
(this=this at entry=0x7ffe36a67620, index=0, instance=0x0,
instance at entry=0x4425990, bindingTarget=0x1c47b30,
bindingTarget at entry=0x4425990, valueTypeProperty=valueTypeProperty at entry=0x0,
bindingsToSkip=...) at qml/qqmlobjectcreator.cpp:1348
#28 0x00000036652b25f3 in QQmlObjectCreator::createInstance
(this=this at entry=0x7ffe36a67620, index=index at entry=0, parent=parent at entry=0x0,
isContextObject=isContextObject at entry=true) at qml/qqmlobjectcreator.cpp:1184
#29 0x00000036652b32f4 in QQmlObjectCreator::create
(this=this at entry=0x7ffe36a67620, subComponentIndex=subComponentIndex at entry=-1,
parent=parent at entry=0x0, interrupt=interrupt at entry=0x0) at
qml/qqmlobjectcreator.cpp:222
#30 0x00000036652b2ddc in QQmlObjectCreator::createInstance
(this=0x7ffe36a682c0, index=8, parent=0x44212a0, isContextObject=<optimized
out>) at qml/qqmlobjectcreator.cpp:1091
#31 0x00000036652b0255 in QQmlObjectCreator::setPropertyBinding
(this=0x7ffe36a682c0, property=0x7f062802e4e8, binding=0x7f062861db3c) at
qml/qqmlobjectcreator.cpp:774
#32 0x00000036652b0f9e in QQmlObjectCreator::setupBindings
(this=this at entry=0x7ffe36a682c0, bindingsToSkip=...) at
qml/qqmlobjectcreator.cpp:733
#33 0x00000036652b190d in QQmlObjectCreator::populateInstance
(this=this at entry=0x7ffe36a682c0, index=4, instance=0x4413050,
instance at entry=0x44212a0, bindingTarget=0x4413050,
bindingTarget at entry=0x44212a0, valueTypeProperty=valueTypeProperty at entry=0x0,
bindingsToSkip=...) at qml/qqmlobjectcreator.cpp:1348
#34 0x00000036652b25f3 in QQmlObjectCreator::createInstance (this=<optimized
out>, index=4, parent=<optimized out>, isContextObject=<optimized out>) at
qml/qqmlobjectcreator.cpp:1184
#35 0x00000036652b0255 in QQmlObjectCreator::setPropertyBinding
(this=0x7ffe36a682c0, property=0x7f062801d758, binding=0x7f062861d8cc) at
qml/qqmlobjectcreator.cpp:774
#36 0x00000036652b0f9e in QQmlObjectCreator::setupBindings
(this=this at entry=0x7ffe36a682c0, bindingsToSkip=...) at
qml/qqmlobjectcreator.cpp:733
#37 0x00000036652b190d in QQmlObjectCreator::populateInstance
(this=this at entry=0x7ffe36a682c0, index=0, instance=0x0,
instance at entry=0x4413050, bindingTarget=0x7ffe36a68450,
bindingTarget at entry=0x4413050, valueTypeProperty=valueTypeProperty at entry=0x0,
bindingsToSkip=...) at qml/qqmlobjectcreator.cpp:1348
#38 0x00000036652b25f3 in QQmlObjectCreator::createInstance
(this=this at entry=0x7ffe36a682c0, index=index at entry=0, parent=parent at entry=0x0,
isContextObject=isContextObject at entry=true) at qml/qqmlobjectcreator.cpp:1184
#39 0x00000036652b32f4 in QQmlObjectCreator::create
(this=this at entry=0x7ffe36a682c0, subComponentIndex=subComponentIndex at entry=-1,
parent=parent at entry=0x0, interrupt=interrupt at entry=0x0) at
qml/qqmlobjectcreator.cpp:222
#40 0x00000036652b2ddc in QQmlObjectCreator::createInstance
(this=this at entry=0x43fd420, index=index at entry=4, parent=parent at entry=0x0,
isContextObject=isContextObject at entry=true) at qml/qqmlobjectcreator.cpp:1091
#41 0x00000036652b32f4 in QQmlObjectCreator::create (this=0x43fd420,
subComponentIndex=3, parent=parent at entry=0x0, interrupt=interrupt at entry=0x0) at
qml/qqmlobjectcreator.cpp:222
#42 0x000000366523b855 in QQmlComponentPrivate::beginCreate (this=0x43f61a0,
context=0x43e7450) at qml/qqmlcomponent.cpp:880
#43 0x000000366523be1a in beginCreate (publicContext=<optimized out>,
this=0x43f4f50) at qml/qqmlcomponent.cpp:829
#44 QQmlComponent::createObject (this=0x43f4f50, args=0x7ffe36a687a0) at
qml/qqmlcomponent.cpp:1222
#45 0x0000003665318f54 in QQmlComponent::qt_static_metacall
(_o=_o at entry=0x43f4f50, _c=_c at entry=QMetaObject::InvokeMetaMethod,
_id=_id at entry=6, _a=_a at entry=0x7ffe36a68770) at .moc/moc_qqmlcomponent.cpp:146
#46 0x0000003665319137 in QQmlComponent::qt_metacall (this=0x43f4f50,
_c=QMetaObject::InvokeMetaMethod, _id=6, _a=0x7ffe36a68770) at
.moc/moc_qqmlcomponent.cpp:205
#47 0x00000036651fedc9 in QV4::QObjectMethod::callInternal (this=<optimized
out>, callData=<optimized out>) at jsruntime/qv4qobjectwrapper.cpp:1882
#48 0x000000366520a2b7 in call (d=0x7f063019f080, this=<optimized out>) at
jsruntime/qv4object_p.h:278
#49 QV4::Runtime::callProperty (context=0x7ffe36a68960, name=0x7f0630187280,
callData=0x7f063019f080) at jsruntime/qv4runtime.cpp:930
#50 0x00007f05937f38d5 in ?? ()
#51 0x00000000043f5330 in ?? ()
#52 0x0000000000000000 in ?? ()

Possible duplicates by query: bug 351483.

Reported using DrKonqi

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