[Orgmode] [BUG - low] capture with region selected in read only erc buffer

[Richard Riley]

If I select a region in, in this case, an erc (emacs irc client) buffer
in the read only section and then use my global keys to create a new
item using the following "j" template while the text is still selected

 ("j" "Journal" entry
  (file+datetree "journal.org")
  "* %T %?\n  %i\n  %a")

then I get the following backtrace :-

Debugger entered--Lisp error: (error "Capture abort: (text-read-only)")
  signal(error ("Capture abort: (text-read-only)"))
  error("Capture abort: %s" (text-read-only))
  byte-code("\301\302!\203\n