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[O] Missing newline in R code causes Org-Mode eval to hang


From: Michael Hannon
Subject: [O] Missing newline in R code causes Org-Mode eval to hang
Date: Mon, 17 Oct 2011 12:57:31 -0700 (PDT)

Greetings.  The appended R code fragment executes without problem in
an ESS buffer, but it hangs indefinitely when I try to execute it
directly from the Org buffer via C-c C-c.

The solution is to add the trailing newline in the "noteToSelf"
variable:

    noteToSelf <- "Buy low.\nSell high.\n"

Obviously this isn't a big deal from my perspective, but it did
surprise me, and it does seem inconsistent.

BTW, I've appended also the details of my own (linux) configuration,
but I tried the same thing on a different OS (Mac OS 10.6.8) and got
the same results.

-- Mike

###### Org code that exhibits error

#+BABEL: :session *R* :cache yes :results output verbatim :exports both :tangle 
yes

* This is a test

#+begin_src R

  x <- 42
  noteToSelf <- "Buy low.\nSell high."
  cat(noteToSelf)
  print("All done now")

#+end_src


###### My set-up

Emacs  : GNU Emacs 23.2.1 (x86_64-redhat-linux-gnu, GTK+ Version 2.24.4)
 of 2011-05-23 on x86-12.phx2.fedoraproject.org
Package: Org-mode version 7.7 (release_7.7.328.g1a97)

current state:
==============
(setq
 org-export-latex-after-initial-vars-hook '(org-beamer-after-initial-vars)
 org-structure-template-alist '(("r" "#+begin_src R\n\n#+end_src" "<src 
lang=\"R\">\n\n</src>")
("S" "#+BEGIN_SRC ?\n\n#+END_SRC" "<src lang=\"?\">\n\n</src>")
("s" "#+begin_src ?\n\n#+end_src" "<src lang=\"?\">\n\n</src>")
("e" "#+begin_example\n?\n#+end_example" "<example>\n?\n</example>")
("q" "#+begin_quote\n?\n#+end_quote" "<quote>\n?\n</quote>")
("v" "#+begin_verse\n?\n#+end_verse" "<verse>\n?\n/verse>")
("c" "#+begin_center\n?\n#+end_center" "<center>\n?\n/center>")
("l" "#+begin_latex\n?\n#+end_latex" "<literal style=\"latex\">\n?\n</literal>")
("L" "#+latex: " "<literal style=\"latex\">?</literal>")
("h" "#+begin_html\n?\n#+end_html" "<literal style=\"html\">\n?\n</literal>")
("H" "#+html: " "<literal style=\"html\">?</literal>") ("a" 
"#+begin_ascii\n?\n#+end_ascii")
("A" "#+ascii: ") ("i" "#+index: ?" "#+index: ?")
("I" "#+include %file ?" "<include file=%file markup=\"?\">"))
 org-speed-command-hook '(org-speed-command-default-hook 
org-babel-speed-command-hook)
 org-agenda-files '("~/Documents/scratch.org")
 org-babel-load-languages '((emacs-lisp . t) (R . t) (python . t) (sh . t) 
(latex . t) (C . t) (octave \.t))
 org-metaup-hook '(org-babel-load-in-session-maybe)
 org-after-todo-state-change-hook '(org-clock-out-if-current)
 org-babel-tangle-lang-exts '(("C++" . "cpp") ("latex" . "tex") ("python" . 
"py") ("emacs-lisp" . "el"))
 org-export-blocks-postblock-hook '(org-exp-res/src-name-cleanup)
 org-export-latex-format-toc-function 'org-export-latex-format-toc-default
 org-tab-first-hook '(org-hide-block-toggle-maybe 
org-src-native-tab-command-maybe org-babel-hide-result-toggle-maybe)
 org-src-mode-hook '(org-src-babel-configure-edit-buffer 
org-src-mode-configure-edit-buffer)
 org-confirm-shell-link-function 'yes-or-no-p
 org-export-first-hook '(org-beamer-initialize-open-trackers)
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-blank-before-new-entry nil
 org-babel-pre-tangle-hook '(save-buffer)
 org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-hide-drawers 
org-cycle-show-empty-lines
 org-optimize-window-after-visibility-change)
 org-export-preprocess-before-normalizing-links-hook 
'(org-remove-file-link-modifiers)
 org-mode-hook '(#[nil "\300\301\302\303\304$\207" [org-add-hook 
change-major-mode-hook org-show-block-all append local] 5]
#[nil "\300\301\302\303\304$\207" [org-add-hook change-major-mode-hook 
org-babel-show-result-all append local] 5]
org-babel-result-hide-spec org-babel-hide-all-hashes)
 org-ctrl-c-ctrl-c-hook '(org-babel-hash-at-point 
org-babel-execute-safely-maybe)
 org-confirm-elisp-link-function 'yes-or-no-p
 org-export-interblocks '((lob org-babel-exp-lob-one-liners) (src 
org-babel-exp-inline-src-blocks))
 org-clock-out-hook '(org-clock-remove-empty-clock-drawer)
 org-occur-hook '(org-first-headline-recenter)
 org-from-is-user-regexp "\\<Michael Hannon\\>"
 org-export-preprocess-before-selecting-backend-code-hook 
'(org-beamer-select-beamer-code)
 org-confirm-babel-evaluate 'my-org-confirm-babel-evaluate
 org-export-latex-final-hook '(org-beamer-amend-header org-beamer-fix-toc 
org-beamer-auto-fragile-frames
      org-beamer-place-default-actions-for-lists)
 org-metadown-hook '(org-babel-pop-to-session-maybe)
 org-export-blocks '((src org-babel-exp-src-block nil) (comment 
org-export-blocks-format-comment t)
    (ditaa org-export-blocks-format-ditaa nil) (dot 
org-export-blocks-format-dot nil))
 )



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