Application: kdeinit5 ()

Qt Version: 5.4.1
Operating System: Linux 3.19.0-15-generic i686
Distribution: Ubuntu 15.04

-- Information about the crash:
- What I was doing when the application crashed:
i start a konsole. it block in fisrt, and in second it crashed.

The crash can be reproduced every time.

-- Backtrace:
Application: kdeinit5 (kdeinit5), signal: Aborted
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[KCrash Handler]
#7  0xb7760be0 in __kernel_vsyscall ()
#8  0xb68f5057 in __GI_raise (sig=6) at ../sysdeps/unix/sysv/linux/raise.c:55
#9  0xb68f6699 in __GI_abort () at abort.c:89
#10 0xb693319e in __libc_message (do_abort=1, fmt=0xb6a2d444 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/posix/libc_fatal.c:175
#11 0xb6938de7 in malloc_printerr (action=<optimized out>, str=0xb6a2d4fc "double free or corruption (out)", ptr=0xaed00468) at malloc.c:4965
#12 0xb693954d in _int_free (av=0xb6a80840 <main_arena>, p=<optimized out>, have_lock=0) at malloc.c:3834
#13 0xb6d6a71d in QMetaCallEvent::~QMetaCallEvent() () from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
#14 0xb6d6a79a in QMetaCallEvent::~QMetaCallEvent() () from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
#15 0xb6d3ca30 in QCoreApplication::removePostedEvents(QObject*, int) () from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
#16 0xb6d6adb9 in QObjectPrivate::~QObjectPrivate() () from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
#17 0xb6d6aefa in QObjectPrivate::~QObjectPrivate() () from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
#18 0xb6d75cd3 in QObject::~QObject() () from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
#19 0xaf7eab4d in ?? () from /usr/lib/i386-linux-gnu/qt5/plugins/platforms/libqxcb.so
#20 0xaf7eac1a in ?? () from /usr/lib/i386-linux-gnu/qt5/plugins/platforms/libqxcb.so
#21 0xaf7ef5ef in ?? () from /usr/lib/i386-linux-gnu/qt5/plugins/platforms/libqxcb.so
#22 0xaf7ef6ea in ?? () from /usr/lib/i386-linux-gnu/qt5/plugins/platforms/libqxcb.so
#23 0xb725dc2f in QGuiApplicationPrivate::~QGuiApplicationPrivate() () from /usr/lib/i386-linux-gnu/sse2/libQt5Gui.so.5
#24 0xb5f3685d in QApplicationPrivate::~QApplicationPrivate() () from /usr/lib/i386-linux-gnu/libQt5Widgets.so.5
#25 0xb5f368fa in QApplicationPrivate::~QApplicationPrivate() () from /usr/lib/i386-linux-gnu/libQt5Widgets.so.5
#26 0xb6d75cd3 in QObject::~QObject() () from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
#27 0xb6d3945c in QCoreApplication::~QCoreApplication() () from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
#28 0xb725d8f1 in QGuiApplication::~QGuiApplication() () from /usr/lib/i386-linux-gnu/sse2/libQt5Gui.so.5
#29 0xb5f3885a in QApplication::~QApplication() () from /usr/lib/i386-linux-gnu/libQt5Widgets.so.5
#30 0xaf977923 in kdemain () from /usr/lib/i386-linux-gnu/libkdeinit5_kwin_rules_dialog.so
#31 0x0804f679 in ?? ()
#32 0x08050f53 in ?? ()
#33 0x080514b1 in ?? ()
#34 0x0804bf12 in main ()

Reported using DrKonqi