qtdbus-5.6.0_rc causes segfault

qtdbus-5.6.0-beta is fine.

When starting kdevelop:

Thread 3 "QDBusConnection" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffecd4c700 (LWP 3432)]
dbus_connection_dispatch (connection=0x0) at /var/tmp/portage/sys-apps/dbus-1.10.6/work/dbus-1.10.6/dbus/dbus-connection.c:4589
4589 CONNECTION_LOCK (connection);
(gdb) bt
#0 dbus_connection_dispatch (connection=0x0) at /var/tmp/portage/sys-apps/dbus-1.10.6/work/dbus-1.10.6/dbus/dbus-connection.c:4589
#1 0x00007ffff7e87151 in q_dbus_connection_dispatch (connection=<optimized out>) at qdbus_symbols_p.h:189
#2 QDBusConnectionPrivate::doDispatch (this=0x7fffe000d2e0) at qdbusintegrator.cpp:1113
#3 0x00007ffff680fd2c in QObject::event (this=0x7fffe000d2e0, e=<optimized out>) at kernel/qobject.cpp:1256
#4 0x00007ffff67e6c3a in doNotify (receiver=<optimized out>, event=<optimized out>) at kernel/qcoreapplication.cpp:1090
#5 0x00007ffff67e6d4b in QCoreApplication::notifyInternal2 (receiver=0x7fffe000d2e0, event=event@entry=0x1256ef0) at kernel/qcoreapplication.cpp:1014
#6 0x00007ffff67e8dc9 in QCoreApplication::sendEvent (event=0x1256ef0, receiver=<optimized out>) at kernel/qcoreapplication.h:227
#7 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=0, event_type@entry=32767, data=0x486f00) at kernel/qcoreapplication.cpp:1650
#8 0x00007ffff67e92ea in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=32767, event_type@entry=0) at kernel/qcoreapplication.cpp:1508
#9 0x00007ffff6834ff3 in postEventSourceDispatch (s=0x7fffe00012d0) at kernel/qeventdispatcher_glib.cpp:270
#10 0x00007ffff2872c2e in g_main_dispatch (context=0x7fffe0000990) at /var/tmp/portage/dev-libs/glib-2.46.2-r1/work/glib-2.46.2/glib/gmain.c:3154
#11 g_main_context_dispatch (context=context@entry=0x7fffe0000990) at /var/tmp/portage/dev-libs/glib-2.46.2-r1/work/glib-2.46.2/glib/gmain.c:3769
#12 0x00007ffff2872e78 in g_main_context_iterate (context=context@entry=0x7fffe0000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>)
at /var/tmp/portage/dev-libs/glib-2.46.2-r1/work/glib-2.46.2/glib/gmain.c:3840
#13 0x00007ffff2872f2c in g_main_context_iteration (context=0x7fffe0000990, may_block=may_block@entry=1)
at /var/tmp/portage/dev-libs/glib-2.46.2-r1/work/glib-2.46.2/glib/gmain.c:3901
#14 0x00007ffff683507f in QEventDispatcherGlib::processEvents (this=0x7fffe00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:417
#15 0x00007ffff67e5b6a in QEventLoop::exec (this=this@entry=0x7fffecd4be10, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#16 0x00007ffff664c33b in QThread::exec (this=this@entry=0x7ffff7ee73c0 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:503
#17 0x00007ffff7e75259 in QDBusConnectionManager::run (this=0x7ffff7ee73c0 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:181
#18 0x00007ffff6650912 in QThreadPrivate::start (arg=0x7ffff7ee73c0 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:340
#19 0x00007ffff31827bd in start_thread (arg=0x7fffecd4c700) at pthread_create.c:333
#20 0x00007ffff616a4cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109