[O] [BUG] babel call lines broken

[Andreas Leha]

Hi all,

there seems to be a bug in evaluating #+call lines.

To reproduce, consider this file:
,----
| * Some Headline
| #+name: parameters
| #+BEGIN_SRC R
|   ttt <- 1
| #+END_SRC
| 
| * Some Other Headline
| #+call: parameters() :results silent :exports none
`----
and do C-c C-c on the #+call: line.

For me that results in:
,----
| Debugger entered--Lisp error: (wrong-type-argument stringp nil)
|   replace-match(nil nil nil nil 3)
|   org-babel-set-current-result-hash(nil)
|   org-babel-lob-execute(("parameters()" ":results silent :exports none" 0))
|   org-babel-lob-execute-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)
`----

Regards,
Andreas

PS: I am on emacs24.2.50.1