[Interest] QGraphicsScene/View getting stuck

[maitai]

Hello,

I have a QGraphicsScene (Qt 5.6 / Windows 10) in which I am injecting 
quite a lot of items (around 10,000). After a while, the application 
freezes (i.e the main thread in which the QGraphicsScene/View resides is 
not responding anymore).

After much digging, my conclusion is that the scene is never returning 
from a private slot, namely _q_processDirtyItems(). The last events 
processed by the main thread are:

Metacall: "_q_processDirtyItems()"
processing event QEvent::Type(MetaCall) 0x1554
event in view QEvent::Type(Paint)
event in view ok 0x1554
And here I normally have a qWarning() saying that the metacall has 
returned, which I never get, so I believe it enters in an infinite loop 
somewhere.

At that point of the application no items were ever deleted, just added.

I had a look at qt sources but couldn't find anything relevant to my 
case.

I am sure I do not update/manipulate/etc any items or QGraphicsScene 
related object from another thread.

Any insight that can help understanding what is going on here?

Thanks
Philippe