Also adviced to include the comint-prompt-regexp:

comint-prompt-regexp is a variable defined in `comint.el'.
Its value is "^[]a-zA-Z0-9.[]*\\([>+.] \\)*[+>] "
Local in buffer *R*; global value is "^"



On Mon, May 19, 2014 at 10:40 PM, Torbjørn Lindahl <
torbjorn.lindahl@gmail.com> wrote:

> Oh and here is backtrace, the auto-generated email was so long I just
> thought it would be in there:
>
> http://fpaste.org/103119/40051358/
>
> Debugger entered--Lisp error: (wrong-type-argument integer-or-marker-p nil)
>   buffer-substring-no-properties(nil 9745)
>   he-init-string(nil 9745)
>   try-expand-line(nil)
>   apply(try-expand-line nil)
>   hippie-expand(nil)
>   call-interactively(hippie-expand record nil)
>   command-execute(hippie-expand record)
>   execute-extended-command(nil "hippie-expand")
>   call-interactively(execute-extended-command nil nil)
>
>
> On Mon, May 19, 2014 at 10:37 PM, Torbjørn Lindahl <
> torbjorn.lindahl@gmail.com> wrote:
>
>> Hi, I tried but don't know how to.
>>
>> I did this:
>>
>> 1. open a text file and apply major mode: "ESS[S] modedefined in
>> 'ess.mode.el' , according to C-h m
>>  2. Start R from that process (need to have R installed, a statistics
>> program)
>> 3. In the inferior R process, try running hippie-expand , that's how I
>> got the error.
>>
>> I have been asking in #emacs @freenonde on how to load ess-mode from -Q,
>> ill tell you when i know
>>
>>
>>
>> On Mon, May 19, 2014 at 6:26 PM, Glenn Morris <rgm@gnu.org> wrote:
>>
>>>
>>> Thanks for the report, but please give us some (any!) details.
>>> Can you give a recipe starting from emacs -Q that shows how to
>>> reproduce the problem?
>>>
>>> Can you do:
>>> M-x toggle-debug-no-error
>>> repeat the problem, and send the backtrace?
>>>
>>> Buried in the automated part of your report, I see the problem was:
>>>
>>>    he-init-string: Wrong type argument: integer-or-marker-p, nil
>>>
>>
>>
>>
>> --
>> mvh
>> Torbjørn Lindahl
>>
>
>
>
> --
> mvh
> Torbjørn Lindahl
>



-- 
mvh
Torbjørn Lindahl