Bug 371056

Kdevelop will crash every time when quit by clicking on the close button of the window.

Reproducible: Always

Steps to Reproduce:
1. Open kdevelop
2. Close kdevelop by the close button on the title bar

Actual Results:  
A window popup declaring a crash of kdevelop

Expected Results:  
Close normally

Version 5.0.2
Using:
KDE Frameworks 5.27.0
Qt 5.7.0 (built against 5.7.0)
The xcb windowing system

The following are obtained from the popup window after crash.

Executable: kdevelop PID: 12084 Signal: Segmentation fault (11) Time: 2016/10/18 09:58:49

Application: kdevelop (kdevelop), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fac336c0800 (LWP 12084))]

Thread 2 (Thread 0x7fac0bfff700 (LWP 12086)):
[KCrash Handler]
#6  0x00007fac30dcf9cf in QObject::disconnect(QObject const*, char const*, QObject const*, char const*) () at /usr/lib/libQt5Core.so.5
#7  0x00007fac32902530 in  () at /usr/lib/libQt5DBus.so.5
#8  0x00007fac32902784 in  () at /usr/lib/libQt5DBus.so.5
#9  0x00007fac32902ab9 in  () at /usr/lib/libQt5DBus.so.5
#10 0x00007fac328eef2e in  () at /usr/lib/libQt5DBus.so.5
#11 0x00007fac30bc5d78 in  () at /usr/lib/libQt5Core.so.5
#12 0x00007fac29da9454 in start_thread () at /usr/lib/libpthread.so.0
#13 0x00007fac304db7df in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7fac336c0800 (LWP 12084)):
#0  0x00007fac29daf10f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fac30bc6c2b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007fac30bc591e in QThread::wait(unsigned long) () at /usr/lib/libQt5Core.so.5
#3  0x00007fac328eecc6 in  () at /usr/lib/libQt5DBus.so.5
#4  0x00007fac328eed59 in  () at /usr/lib/libQt5DBus.so.5
#5  0x00007fac30428990 in __run_exit_handlers () at /usr/lib/libc.so.6
#6  0x00007fac304289ea in  () at /usr/lib/libc.so.6
#7  0x00007fac30413298 in __libc_start_main () at /usr/lib/libc.so.6
#8  0x000000000040c0ea in _start ()