[ESS] BUG orgmode incompability

[Andreas Leha]

Hi all,

I just upgraded ess from 13.05 to 13.09-1 (current git).

Now, evaluation from orgmode when in session mode fails.

Here is a test org file (do C-c C-c inside the src block):

--8<---------------cut here---------------start------------->8---
* Test
#+name: testblk
#+begin_src R :session *dtrn*
  library("ggplot2")
#+end_src
--8<---------------cut here---------------end--------------->8---

Here is the backtrace I get:


--8<---------------cut here---------------start------------->8---
Debugger entered--Lisp error: (wrong-type-argument stringp nil)
  file-name-nondirectory(nil)
  ess--make-source-refd-command(1 19 nil)
  ess-tracebug-send-region(#<process R> 1 19 nil "Eval buffer" buffer)
  ess-eval-region(1 19 nil "Eval buffer" buffer)
  ess-eval-buffer(nil)
  org-babel-R-evaluate-session("*dtrn*" "library(\"ggplot2\")" value ("replace") nil nil)
  org-babel-R-evaluate("*dtrn*" "library(\"ggplot2\")" value ("replace") nil nil)
  org-babel-execute:R("library(\"ggplot2\")" ((:comments . "") (:shebang . "") (:cache . "no") (:padline . "") (:noweb . "no") (:tangle . "no") (:exports . "code") (:results . "replace") (:hlines . "no") (:session . "*dtrn*") (:result-type . value) (:result-params "replace") (:rowname-names) (:colname-names)))
  org-babel-execute-src-block(nil)
  org-babel-execute-src-block-maybe()
  org-babel-execute-maybe()
  org-babel-execute-safely-maybe()
  run-hook-with-args-until-success(org-babel-execute-safely-maybe)
  org-ctrl-c-ctrl-c(nil)
  call-interactively(org-ctrl-c-ctrl-c nil nil)
--8<---------------cut here---------------end--------------->8---


I get the same with `emacs -Q`.  If important, my orgmode version is
8.2.1 (release_8.2.1-113-g24c49a)

Regards,
Andreas