help needed debugging a crash

[Dag]

:Hi, I have a crash in plan on exit which I don't know how to squash.
https://bugs.kde.org/show_bug.cgi?id=298075

It happends sometimes (today: once in ~30 runs). I hoped it was a koffice issue 
because I had not seen it in calligra untill a few days ago.

The crash is always in a dbus object in qobject.cpp:854 where it tries to 
access a declarative data object:

853 if (d->declarativeData)
854      QAbstractDeclarativeData::destroyed(d->declarativeData, this);

When running gdb, I can see that d->declarativeData != 0, but the destroyed() 
function pointer == 0, hence crash.

I cannot find any use of declaratives in dbus, but I might not have looked in 
the right place.

The only theory I have is that there a bug somewhere that overwrites
d->declarativeData.

How to catch this?
Anybody?
-- 
Mvh.
Dag Andersen