I can reproduce this. Add a grid to a form, then open the columns editor. Once it is shown, right-click the form and click "View as Text" and it will crash.
It's really annoying and inconvenient since I've lost unsaved work to this a number of times. I didn't know what was causing it since Delphi crashes all the time I thought it was due to that. I was able to narrow it down to the editor so I felt I should report it so at least you're aware.