Application: ksysguard (5.4.2)

Qt Version: 5.4.2
Operating System: Linux 4.2.0-18-generic x86_64
Distribution: Ubuntu 15.10

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

i just closed KSysGuard with the top right X-Button in the Title bar.
the window closed - but than the Crash-Report opend up.
this was right after my system wakeup from sleep.

-- Backtrace:
Application: System Monitor (ksysguard), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7feeed92b840 (LWP 2754))]

Thread 2 (Thread 0x7feeeaec0700 (LWP 2755)):
#0  0x00007fef05b088dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007feefb7adbd2 in poll (__timeout=-1, __nfds=1, __fds=0x7feeeaebfc80) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#2  _xcb_conn_wait (c=c@entry=0x1003070, cond=cond@entry=0x10030b0, vector=vector@entry=0x0, count=count@entry=0x0) at ../../src/xcb_conn.c:459
#3  0x00007feefb7af74f in xcb_wait_for_event (c=0x1003070) at ../../src/xcb_in.c:623
#4  0x00007feeed459a39 in QXcbEventReader::run (this=0x1010b50) at qxcbconnection.cpp:1105
#5  0x00007fef01ab92be in QThreadPrivate::start (arg=0x1010b50) at thread/qthread_unix.cpp:337
#6  0x00007feefb38a6aa in start_thread (arg=0x7feeeaec0700) at pthread_create.c:333
#7  0x00007fef05b13eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7feeed92b840 (LWP 2754)):
[KCrash Handler]
#6  QXcbConnection::finalizeXInput2 (this=this@entry=0x10019c0) at qxcbconnection_xi2.cpp:261
#7  0x00007feeed459d67 in QXcbConnection::~QXcbConnection (this=0x10019c0, __in_chrg=<optimized out>) at qxcbconnection.cpp:424
#8  0x00007feeed45a229 in QXcbConnection::~QXcbConnection (this=0x10019c0, __in_chrg=<optimized out>) at qxcbconnection.cpp:450
#9  0x00007feeed45da4e in qDeleteAll<QList<QXcbConnection*>::const_iterator> (end=..., begin=...) at ../../../../include/QtCore/../../src/corelib/tools/qalgorithms.h:315
#10 qDeleteAll<QList<QXcbConnection*> > (c=...) at ../../../../include/QtCore/../../src/corelib/tools/qalgorithms.h:323
#11 QXcbIntegration::~QXcbIntegration (this=0xfe9090, __in_chrg=<optimized out>) at qxcbintegration.cpp:189
#12 0x00007feeed45db49 in QXcbIntegration::~QXcbIntegration (this=0xfe9090, __in_chrg=<optimized out>) at qxcbintegration.cpp:190
#13 0x00007fef01fb213e in QGuiApplicationPrivate::~QGuiApplicationPrivate (this=0xfe6180, __in_chrg=<optimized out>) at kernel/qguiapplication.cpp:1374
#14 0x00007fef02561c49 in QApplicationPrivate::~QApplicationPrivate (this=0xfe6180, __in_chrg=<optimized out>) at kernel/qapplication.cpp:183
#15 0x00007fef01cd1668 in QScopedPointerDeleter<QObjectData>::cleanup (pointer=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:54
#16 QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> >::~QScopedPointer (this=0x7ffd5d523c68, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:101
#17 QObject::~QObject (this=<optimized out>, __in_chrg=<optimized out>) at kernel/qobject.cpp:882
#18 0x00007fef025639ab in QApplication::~QApplication (this=0x7ffd5d523c60, __in_chrg=<optimized out>) at kernel/qapplication.cpp:803
#19 0x00007fef05e4ed31 in kdemain () from /usr/lib/x86_64-linux-gnu/libkdeinit5_ksysguard.so
#20 0x00007fef05a2da40 in __libc_start_main (main=0x400730 <main>, argc=1, argv=0x7ffd5d523da8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd5d523d98) at libc-start.c:289
#21 0x0000000000400769 in _start ()

Reported using DrKonqi