Steps to reproduce:
Include an entry like this in your org-capture-templates:
("t" "Todo" entry (file+headline "~/org/gtd.org" "Tasks")
"* TODO %?\n %i\n %a")
Now, delete everything in ~/org/gtd.org except for a lone "Tasks" headline.
Put point on the next line, and start a capture with the template
above. Move point down to the beginning of the line with the "Tasks"
link, and C-k (org-kill-line).
For me, emacs crashes with "Fatal error (6)Aborted". If I first modify
the link and undo the changes, there is no crash.
Can anyone else reproduce?