Rhino WIP open gh file Rhino will stop running

I wrote in rhino 5 gh in normal operation.

But using rhino6WIP open, Rhino will stop running. This is a bug ?

gh file.
123.zip (20.3 KB)

Thanks, I have reported this as https://mcneel.myjetbrains.com/youtrack/issue/RH-34087

The next release of Rhino WIP will have this fix, thanks.