Application: kdeinit5 (15.04.0)

Qt Version: 5.4.1
Operating System: Linux 3.19.0-31-generic x86_64
Distribution: Ubuntu 15.04

-- Information about the crash:
What I was doing when the application crashed:  Opened up system settings, closed it and it crashed, like usual...

The crash can be reproduced sometimes.

-- Backtrace:
Application: Konsole (kdeinit5), signal: Aborted
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[KCrash Handler]
#6  0x00007fad47e1a267 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:55
#7  0x00007fad47e1beca in __GI_abort () at abort.c:89
#8  0x00007fad47e5dc53 in __libc_message (do_abort=do_abort@entry=1, fmt=fmt@entry=0x7fad47f761a8 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/posix/libc_fatal.c:175
#9  0x00007fad47e65c69 in malloc_printerr (ptr=<optimized out>, str=0x7fad47f722fa "free(): invalid pointer", action=1) at malloc.c:4965
#10 _int_free (av=<optimized out>, p=<optimized out>, have_lock=0) at malloc.c:3834
#11 0x00007fad47e6989c in __GI___libc_free (mem=<optimized out>) at malloc.c:2950
#12 0x00007fad46346293 in _xcb_in_destroy (in=in@entry=0x15b2440) at ../../src/xcb_in.c:829
#13 0x00007fad463447a0 in xcb_disconnect (c=0x15b2400) at ../../src/xcb_conn.c:354
#14 0x00007fad4870c617 in XCloseDisplay () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#15 0x00007fad359951f4 in QXcbConnection::~QXcbConnection (this=0x15b0d40, __in_chrg=<optimized out>) at qxcbconnection.cpp:444
#16 0x00007fad35995619 in QXcbConnection::~QXcbConnection (this=0x15b0d40, __in_chrg=<optimized out>) at qxcbconnection.cpp:450
#17 0x00007fad35999d3e in qDeleteAll<QList<QXcbConnection*>::const_iterator> (end=..., begin=...) at ../../../../include/QtCore/../../src/corelib/tools/qalgorithms.h:315
#18 qDeleteAll<QList<QXcbConnection*> > (c=...) at ../../../../include/QtCore/../../src/corelib/tools/qalgorithms.h:323
#19 QXcbIntegration::~QXcbIntegration (this=0x15993d0, __in_chrg=<optimized out>) at qxcbintegration.cpp:189
#20 0x00007fad35999e19 in QXcbIntegration::~QXcbIntegration (this=0x15993d0, __in_chrg=<optimized out>) at qxcbintegration.cpp:190
#21 0x00007fad491995c0 in QGuiApplicationPrivate::~QGuiApplicationPrivate (this=0x158ef70, __in_chrg=<optimized out>) at kernel/qguiapplication.cpp:1374
#22 0x00007fad468b64e9 in QApplicationPrivate::~QApplicationPrivate (this=0x158ef70, __in_chrg=<optimized out>) at kernel/qapplication.cpp:183
#23 0x00007fad484ca83b in cleanup (pointer=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:54
#24 ~QScopedPointer (this=0x7ffe88a8a2a8, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:101
#25 QObject::~QObject (this=<optimized out>, __in_chrg=<optimized out>) at kernel/qobject.cpp:882
#26 0x00007fad468b8133 in QApplication::~QApplication (this=0x7ffe88a8a2a0, __in_chrg=<optimized out>) at kernel/qapplication.cpp:803
#27 0x00007fad37c2b879 in kdemain () from /usr/lib/x86_64-linux-gnu/libkdeinit5_konsole.so
#28 0x0000000000408716 in ?? ()
#29 0x000000000040a132 in ?? ()
#30 0x000000000040a6ee in ?? ()
#31 0x000000000040501b in main ()

Possible duplicates by query: bug 348699, bug 347139, bug 347134, bug 347050, bug 346742.

Reported using DrKonqi