segfault on removal of port connection and addition/removal of new port

[tomascelko]

What I'm doing is the following:

1. add a Node with multiple output ports attached
2. add a connection (edge) from one of the ports to another node
3. remove the connection ( without this step there is no problem)
4. insert port to the collection of ports attached to this node (alternatively remove any port from this node)
5. segfault in PortItem::updateEdges() }(see below)

void    PortItem::updateEdges()
{
    for (auto inEdgeItem: _inEdgeItems)
        if (inEdgeItem != nullptr)
            inEdgeItem->updateItem();
    for (auto outEdgeItem: _outEdgeItems)
        if (outEdgeItem != nullptr)
            outEdgeItem->updateItem(); //Here I get segfault (before any breakpoint within updateItem() is reached)
}

I'm not necessarily indicating that this is a bug. I'd be very grateful if you have any pointers on what could raise such an error. If you need more context, please ask. I'd be happy to provide it.
Many thanks.