Error in ConnectionLine when trying to change the source handle on an edge that has a target that is an output type node

[ImBaedin]

Example here: https://codesandbox.io/s/bold-breeze-nlg5s?file=/src/App.js

[ImBaedin]

I think I may have found a lead. It seems that when you grab the source handle, the end of the connection line attaches to the source of the target node.

For this, all I did was click and drag the source of the line to the right a bit. You can see that the connection point is no longer the target, but the source. An output type node doesn't have a source though, so it's erroring out.

[sginn]

I ran into this problem as well. The updatable-edge example reproduces the awkward positioning of a dragged edge, and if you change Node C to an "Output" node, you can recreate the crash

sourceNode.__rf.handleBounds[connectionHandleType] is null

If we change this line to the below, everything appears to work again:

const handleType = isTarget ? 'target' : 'source';

@moklick I was going to submit a PR for this change, but saw that change would likely regress #982

I'm not sure if there's an answer that gets us both issues...

[moklick]

I will take a look at this issue. Thanks for the input here!

[moklick]

Could you try v9.5.5 ?

[sginn]

This is great! Thanks for the really fast turnaround!
The upgrade fixed the issue for us.