[O] Bug: org-export-as-latex fails [7.7]

[Rick Frankel]

Your bug report will be posted to the Org-mode mailing list.
------------------------------------------------------------------------

running org-export-as-latex on the following file works in org v7.5
and fails in org v7.7 (not sure about v7.6) with the error:

        org-export-latex-preprocess: Wrong type argument: stringp, nil

==== cut here ===
* Test
  #+begin_src perl
    $a=[0];
  #+end_src
==== end file ===

Emacs  : GNU Emacs 23.3.6 (sparc-sun-solaris2.10, GTK+ Version 2.8.20)
 of 2011-06-13 on localhost
Package: Org-mode version 7.7

current state:
==============
(setq
 org-export-latex-default-class "my-class"
 org-export-with-LaTeX-fragments nil
 org-emphasis-alist '(("*" bold "<b>" "</b>") ("/" italic "<i>" "</i>")
                      ("_" underline "<span 
style=\"text-decoration:underline;\">"
                       "</span>")
                      ("`" org-code "<code>" "</code>")
                      ("=" org-code "<code>" "</code>" verbatim)
                      ("~" org-verbatim "<code>" "</code>" verbatim)
                      ("+" (:strike-through t) "<del>" "</del>"))
 org-export-latex-after-initial-vars-hook 
'(org-beamer-after-initial-vars)
 org-export-latex-listings 'minted
 org-startup-align-all-tables t
 org-speed-command-hook '(org-speed-command-default-hook
                          org-babel-speed-command-hook)
 org-src-fontify-natively t
 org-export-latex-tables-centered nil
 org-babel-load-languages '((perl . t) (dot . t) (mscgen . t) (sh . t)
                            (emacs-lisp . t))
 org-hide-leading-stars t
 org-export-html-validation-link ""
 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 '(("perl" . "pl") ("emacs-lisp" . "el"))
 org-export-pdf-logfiles '("tex" "aux" "idx" "log" "out" "toc" "nav" 
"snm" "vrb")
 org-export-blocks-postblock-hook '(org-exp-res/src-name-cleanup)
 org-startup-with-inline-images t
 org-export-latex-format-toc-function 'my-toc-default
 org-latex-to-pdf-process '("PDFLATEX='pdflatex -shell-escape' texi2dvi 
-p -q -o %o -c %f")
 org-export-time-stamp-file nil
 org-src-lang-modes '(("ocaml" . tuareg) ("elisp" . emacs-lisp) 
("ditaa" . artist)
                      ("asymptote" . asy) ("dot" . graphviz-dot)
                      ("graphviz" . graphviz-dot) ("mscgen" . 
graphviz-dot)
                      ("sql-src" . sql-edit) ("sql" . sql-edit)
                      ("sqlite" . sql-edit) ("plantuml" . plantuml)
                      ("calc" . fundamental))
 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 '((lambda nil (setq require-final-newline nil))
                     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-startup-indented t
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-M-RET-may-split-line '((default))
 org-babel-sh-var-quote-fmt "$(cat <<BABEL_TABLE\n%s\nBABEL_TABLE\n)"
 outline-mode-hook '((lambda nil (require (quote outline-magic))
                      (define-key outline-minor-mode-map [(tab)]
                       (quote outline-cycle))
                      )
                     )
 org-export-html-use-infojs 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-latex-classes '(("my-class"
                             "\\documentclass{ca-article}\n    
[NO-DEFAULT-PACKAGES]\n    [EXTRA]"
                             ("\\section{%s}" . "\\section*{%s}")
                             ("\\subsection{%s}" . "\\subsection*{%s}")
                             ("\\subsubsection{%s}" . 
"\\subsubsection*{%s}")
                             ("\\paragraph{%s}" . "\\paragraph*{%s}")
                             ("\\subparagraph{%s}" . 
"\\subparagraph*{%s}"))
                            ("article" "\\documentclass[11pt]{article}"
                             ("\\section{%s}" . "\\section*{%s}")
                             ("\\subsection{%s}" . "\\subsection*{%s}")
                             ("\\subsubsection{%s}" . 
"\\subsubsection*{%s}")
                             ("\\paragraph{%s}" . "\\paragraph*{%s}")
                             ("\\subparagraph{%s}" . 
"\\subparagraph*{%s}"))
                            ("report" "\\documentclass[11pt]{report}"
                             ("\\part{%s}" . "\\part*{%s}")
                             ("\\chapter{%s}" . "\\chapter*{%s}")
                             ("\\section{%s}" . "\\section*{%s}")
                             ("\\subsection{%s}" . "\\subsection*{%s}")
                             ("\\subsubsection{%s}" . 
"\\subsubsection*{%s}"))
                            ("book" "\\documentclass[11pt]{book}"
                             ("\\part{%s}" . "\\part*{%s}")
                             ("\\chapter{%s}" . "\\chapter*{%s}")
                             ("\\section{%s}" . "\\section*{%s}")
                             ("\\subsection{%s}" . "\\subsection*{%s}")
                             ("\\subsubsection{%s}" . 
"\\subsubsection*{%s}"))
                            ("beamer" "\\documentclass{beamer}"
                             org-beamer-sectioning)
                            )
 org-export-preprocess-before-normalizing-links-hook 
'(org-remove-file-link-modifiers)
 outline-cycle-emulate-tab t
 org-mode-hook '(imenu-add-menubar-index turn-on-auto-fill 
expand-tabs-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-export-htmlize-output-type 'css
 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-latex-title-command "\\maketitle\\thispagestyle{empty}"
 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-babel-after-execute-hook '(org-display-inline-images)
 org-occur-hook '(org-first-headline-recenter)
 org-from-is-user-regexp "\\<Rick Frankel\\>"
 org-export-babel-evaluate nil
 org-export-preprocess-before-selecting-backend-code-hook 
'(org-beamer-select-beamer-code)
 org-export-with-section-numbers nil
 org-confirm-babel-evaluate nil
 org-modules '(org-bbdb org-bibtex org-docview org-gnus org-info 
org-jsinfo org-irc
               org-mew org-mhe org-rmail org-vm org-wl org-w3m)
 org-infojs-options '((path . "http://orgmode.org/org-info.js";) (view . 
"showall")
                      (toc . "t") (ftoc . "0") (tdepth . "max") (sdepth 
. "max")
                      (mouse . "underline") (buttons . "nil") (ltoc . 
"nil")
                      (up . :link-up) (home . :link-home))
 outline-minor-mode-hook '((lambda nil (require (quote outline-magic))
                            (define-key outline-minor-mode-map [(tab)]
                             (quote outline-cycle))
                            )
                           )
 org-ellipsis 'org-warning
 org-export-html-style-extra "\n<link rel=\"stylesheet\" 
href=\"http://localhost:8080/stylesheets/default.css\"; />\n<link 
rel=\"stylesheet\" href=\"http://localhost:8080/stylesheets/org.css\"; 
/>\n<link rel=\"stylesheet\" 
href=\"http://localhost:8080/stylesheets/org-ie.css\"; />\n<link 
rel=\"stylesheet\" href=\"extra.css\" />\n"
 org-export-latex-minted-options '(("linenos" "true") ("stepnumber" 
"5")
                                   ("numbersep" "0.25em") ("frame" 
"leftline")
                                   ("framerule" "1pt")
                                   ("rulecolor" "\\color{framecolor}"))
 org-use-sub-superscripts '{}
 org-export-latex-final-hook '(my-class:org-latex-filter 
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-link-abbrev-alist '(("jira" . "https://localhost/jira/browse/";))
 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))
 )