Bug 357644

Summary:	Plasma crashed affter delete new standart panel
Product:	[Plasma] plasmashell	Reporter:	Vladimir <v_bolvin>
Component:	general	Assignee:	David Edmundson <kde>
Status:	RESOLVED FIXED
Severity:	crash	CC:	bshah, plasma-bugs-null
Priority:	NOR	Keywords:	drkonqi
Version First Reported In:	5.4.2
Target Milestone:	1.0
Platform:	Ubuntu
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Vladimir 2016-01-07 10:09:10 UTC

Application: plasmashell (5.4.2)

Qt Version: 5.4.2
Operating System: Linux 4.2.0-22-generic x86_64
Distribution: Ubuntu 15.10

-- Information about the crash:
- What I was doing when the application crashed:
add new panel
changed setting work room by "Settings Folder"
run VirtualBox -> start guest system->(one time) in kubuntu delete new panel
Crashed

-- 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 0x7fa2835aa800 (LWP 1178))]

Thread 9 (Thread 0x7fa26ead1700 (LWP 1182)):
#0  0x00007fa27dd528dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa281d99bd2 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fa281d9b74f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fa270e1ba39 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
#4  0x00007fa27e4452be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fa27d5346aa in start_thread (arg=0x7fa26ead1700) at pthread_create.c:333
#6  0x00007fa27dd5deed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7fa267fff700 (LWP 1185)):
#0  0x00007fa27dd528dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa27aaff1ec in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa27aaff2fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa27e67c29b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fa27e62275a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fa27e4403d4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fa280c68f85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fa27e4452be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fa27d5346aa in start_thread (arg=0x7fa267fff700) at pthread_create.c:333
#9  0x00007fa27dd5deed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7fa25e0db700 (LWP 1190)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fa265a9a4da in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#2  0x00007fa265a99c17 in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#3  0x00007fa27d5346aa in start_thread (arg=0x7fa25e0db700) at pthread_create.c:333
#4  0x00007fa27dd5deed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7fa259cec700 (LWP 1200)):
#0  0x00007fa27ab43869 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fa27aafe2c4 in g_main_context_release () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa27aaff1a6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa27aaff2fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fa27e67c29b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fa27e62275a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fa27e4403d4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fa280c68f85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007fa27e4452be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fa27d5346aa in start_thread (arg=0x7fa259cec700) at pthread_create.c:333
#10 0x00007fa27dd5deed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7fa253484700 (LWP 1212)):
#0  0x00007fa27dd4e49d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa27ab424e0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa27aafecd4 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa27aaff190 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fa27aaff2fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fa27e67c29b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fa27e62275a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fa27e4403d4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fa280c68f85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007fa27e4452be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fa27d5346aa in start_thread (arg=0x7fa253484700) at pthread_create.c:333
#11 0x00007fa27dd5deed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7fa251bb0700 (LWP 1219)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fa282ff4114 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007fa282ff4159 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007fa27d5346aa in start_thread (arg=0x7fa251bb0700) at pthread_create.c:333
#4  0x00007fa27dd5deed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fa24b0f5700 (LWP 1221)):
#0  0x00007fa27aafe657 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fa27aaff11b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa27aaff2fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa27e67c29b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fa27e62275a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fa27e4403d4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fa2815e4ef6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fa27e4452be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fa27d5346aa in start_thread (arg=0x7fa24b0f5700) at pthread_create.c:333
#9  0x00007fa27dd5deed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fa1b6aa7700 (LWP 1379)):
#0  0x00007fa27dd4e4a1 in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa27ab424e0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa27aafecd4 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa27aaff190 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fa27aaff2fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fa27e67c29b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fa27e62275a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fa27e4403d4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fa1b8d3e8f7 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#9  0x00007fa27e4452be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fa27d5346aa in start_thread (arg=0x7fa1b6aa7700) at pthread_create.c:333
#11 0x00007fa27dd5deed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fa2835aa800 (LWP 1178)):
[KCrash Handler]
#6  0x00007fa27e65d2b5 in QObject::~QObject() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fa26c125a37 in IconItem::~IconItem (this=0x3b04ed0, __in_chrg=<optimized out>) at ../../../../src/declarativeimports/core/iconitem.cpp:77
#8  0x00007fa26c1047f6 in QQmlPrivate::QQmlElement<IconItem>::~QQmlElement (this=0x3b04ed0, __in_chrg=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtQml/qqmlprivate.h:98
#9  QQmlPrivate::QQmlElement<IconItem>::~QQmlElement (this=0x3b04ed0, __in_chrg=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtQml/qqmlprivate.h:98
#10 0x00007fa27e653d2b in QObjectPrivate::deleteChildren() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007fa27e65d620 in QObject::~QObject() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007fa2816752bd in QQuickItem::~QQuickItem() () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#13 0x00007fa28168f7c6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#14 0x00007fa27e653d2b in QObjectPrivate::deleteChildren() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00007fa27e65d620 in QObject::~QObject() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007fa2816752bd in QQuickItem::~QQuickItem() () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#17 0x00007fa28168fb96 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#18 0x00007fa27e656670 in QObject::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007fa28167310b in QQuickItem::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#20 0x00007fa27f102b8c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x00007fa27f108230 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#22 0x00007fa27e624f1b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007fa27e627057 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007fa27e67be73 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007fa27aafeff7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007fa27aaff250 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007fa27aaff2fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007fa27e67c27f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007fa27e62275a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007fa27e62a2cc in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00000000004322c3 in main (argc=2, argv=<optimized out>) at ../../shell/main.cpp:176

Reported using DrKonqi

Comment 1 David Edmundson 2016-01-09 14:49:42 UTC

I did fix a crash with removing panels for 5.5.3

Though the backtrace doesn't match yours exactly, so I'm not 100% convinced it's the same. I checked out the code your trace points to, and everything is in order; nothing there that could crash. 

I'm going to assume it's the same bug and your trace is corrupted (which happens). 
Please reopen if you see this again with an up-to-date Plasma.