Same thing on Rhino 6 WIP and Grasshopper 1.0, and also the native Rhino EditPythonScript editor of both Rhino 5 and Rhino 6 WIP. Simply commenting the clr. line restores completion.
First use a series component with start=1, step=42, count=3
Use the output to create a new series component with start=existingseries, step=1, count=11
Start Rhino, run _Grasshopper.
Officially the edit-and-continue feature allows you to rebuild the code while it's running, but I have never been able to make it work.…
Added by David Rutten at 2:14am on February 24, 2016