Affected version: 2016.2.504.45
Steps to reproduce:
1) Create a RadGrid with a GridCalculatedColumn
2) Follow the first steps outlined in the documentation to put all rows in edit mode by calling Rebind() during prerender
Link: http://docs.telerik.com/devtools/aspnet-ajax/controls/grid/how-to/data-editing/put-all-items-in-edit-mode
3) Crash
Solution:
Follow the second steps outlined in the documentation to put all rows in edit mode via OnItemCreated