Eshell - `Text is read-only`

[deech]

Hi all,
I've run into the dreaded `Text is read-only` bug which stops eshell from 
closing and Emacs from exiting. I got this in a previous version of Emacs and 
fixed it with the following snippet:
(setq eshell-prompt-function
  (lambda ()
    (concat (eshell/pwd) "\n$"))
  eshell-prompt-regexp (concat "^" (regexp-quote "$")))

I'm currently using Emacs 24.3.50.1 and it appears to be back and the above 
snippet doesn't seem to work.

Any help is appreciated.

-deech