[O] LaTeX export crashes

[Ken Williams]

Hi, the following document makes a LaTeX export (C-c C-e d) crash with
"Args out of range: "", -1, 0".  After that, exporting (to any format)
dies with the same error.

------------------
#+TITLE: Test doc
#+AUTHOR: Ken Williams

Some stuff.

#+begin_src R
5+5
#+end_src
------------------

Is this a known problem?

If I either omit the R source block, or add a top-level outline
element to the document, then the export succeeds.  For now as a
workaround I guess I'll add a header.

Thanks,

 -Ken



Emacs  : GNU Emacs 23.3.1 (i386-mingw-nt6.1.7600)
 of 2011-03-10 on 3249CTO
Package: Org-mode version 7.7

current state:
==============
(setq
 org-log-done 'time
 org-export-latex-after-initial-vars-hook '(org-beamer-after-initial-vars)
 org-speed-command-hook '(org-speed-command-default-hook
org-babel-speed-command-hook)
 org-babel-load-languages '((emacs-lisp) (R . t))
 org-metaup-hook '(org-babel-load-in-session-maybe)
 org-after-todo-state-change-hook '(org-clock-out-if-current)
 org-alphabetical-lists t
 org-export-blocks-postblock-hook '(org-exp-res/src-name-cleanup)
 org-export-html-style "<style type=\"text/css\">\n
<!--/*--><![CDATA[/*><!--*/\n      .src             {
background-color: #F5FFF5; position: relative; overflow: visible;
margin-right: auto; }\n      .src:before      { position: absolute;
top: -15px; background: #ffffff; padding: 1px; border: 1px solid
#000000; font-size: small; }\n      .src-sh:before   { content: 'sh';
}\n      .src-bash:before { content: 'sh'; }\n      .src-R:before    {
content: 'R'; }\n      .src-perl:before { content: 'Perl'; }\n
.src-sql:before  { content: 'SQL'; }\n      .example         {
background-color: #FFF5F5; }\n    /*]]>*/-->\n</style>"
 org-export-latex-format-toc-function 'org-export-latex-format-toc-default
 org-export-preprocess-hook '((lambda nil
                               (org-set-local (quote
 org-complex-heading-regexp)
                                "^\\(\\*+\\)[
 ]+\\(?:\\(TODO\\|DONE\\)\\>\\)?\\(?:[  ]*\\(\\[#.\\]\\)\\)?[
 ]*\\(.*?\\)\\(?:[      ]+\\(:[[:alnum:address@hidden:]+:\\)\\)?[       ]*$")
                               )
                              )
 org-tab-first-hook '(org-hide-block-toggle-maybe
org-src-native-tab-command-maybe org-babel-hide-result-toggle-maybe)
 org-src-mode-hook '(org-src-babel-configure-edit-buffer
org-src-mode-configure-edit-buffer)
 org-confirm-shell-link-function 'yes-or-no-p
 org-export-first-hook '(org-beamer-initialize-open-trackers)
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-babel-pre-tangle-hook '(save-buffer)
 org-cycle-hook '(org-cycle-hide-archived-subtrees
 org-cycle-hide-drawers org-cycle-show-empty-lines
                  org-optimize-window-after-visibility-change)
 org-export-preprocess-before-normalizing-links-hook
'(org-remove-file-link-modifiers)
 org-mode-hook '(#[nil "\300\301\302\303\304$\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 nil
 org-export-babel-evaluate nil
 org-export-preprocess-before-selecting-backend-code-hook
'(org-beamer-select-beamer-code)
 org-confirm-babel-evaluate nil
 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))
 )