[O] Bug: indenting in sh-mode org-babel source block causes 100% CPU [8.2.3c (8.2.3c-elpa @ /Users/hinmanm/.emacs.d/elpa/org-20131115/)]

[Lee Hinman]

If I have a simple org-mode file containing:

#+BEGIN_SRC sh

#+END_SRC

And I hit C-c ' to edit code in the block, then type (ignore the <<>>
for a second):

for i in {1..10}; do
<<>>
done

If I place my cursor at the <<>> and hit TAB to indent, Emacs freezes,
using 100% CPU until I quit. For reference, this works completely fine
in a regular sh-mode buffer, it only freezes if editing an org-babel
block.

I've used the profiler to narrow this down to something in the smie
indention code, but my elisp-fu is too weak to narrow any further.

;; Lee Hinman

Emacs  : GNU Emacs 24.3.50.1 (i386-apple-darwin12.5.0, NS
apple-appkit-1187.40)
 of 2013-10-28 on Xanadu.local
Package: Org-mode version 8.2.3c (8.2.3c-elpa @
/Users/hinmanm/.emacs.d/elpa/org-20131115/)

current state:
==============
(setq
 org-export-backends '(ascii html icalendar latex md)
 org-export-babel-evaluate nil
 org-tab-first-hook '(org-hide-block-toggle-maybe
org-src-native-tab-command-maybe
                      org-babel-hide-result-toggle-maybe
org-babel-header-arg-expand)
 org-speed-command-hook '(org-speed-command-default-hook
org-babel-speed-command-hook)
 org-occur-hook '(org-first-headline-recenter)
 org-metaup-hook '(org-babel-load-in-session-maybe)
 org-confirm-shell-link-function 'yes-or-no-p
 org-return-follows-link t
 org-todo-keyword-faces '(("STARTED" :foreground "deep sky blue" :weight
bold)
                          ("DONE" :foreground "SpringGreen1" :weight bold)
                          ("WAITING" :foreground "orange" :weight bold))
 org-after-todo-state-change-hook '(org-clock-out-if-current)
 org-src-mode-hook '(org-src-babel-configure-edit-buffer
org-src-mode-configure-edit-buffer)
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-babel-pre-tangle-hook '(save-buffer)
 org-mode-hook '(org-clock-load
                 #[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
                 (lambda nil (define-key org-mode-map [C-tab] (quote
other-window))
                  (flyspell-mode -1)
                  (define-key org-mode-map [C-S-tab] (lambda nil
(interactive) (other-window -1))))
                 yas-minor-mode-on)
 org-refile-targets '(("~hinmanm/org/todo.org" :level . 1)
("~hinmanm/org/notes.org" :level . 1))
 org-clock-persist 'history
 org-ctrl-c-ctrl-c-hook '(org-babel-hash-at-point
org-babel-execute-safely-maybe)
 org-directory "~/.emacs.d/"
 org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-hide-drawers
                  org-cycle-hide-inline-tasks org-cycle-show-empty-lines
                  org-optimize-window-after-visibility-change)
 org-todo-keywords '((sequence "TODO(t)" "STARTED(s)" "WAITING(w)" "|"
"DONE(x)" "CANCEL(c)")
                     (sequence "WAITING(f)" "|" "DONE(x)" "CANCEL(c)"))
 org-modules '(org-bbdb org-bibtex org-docview org-gnus org-info org-irc
org-mhe org-rmail org-w3m
               org-velocity)
 org-babel-tangle-lang-exts '(("python" . "py") ("ruby" . "rb")
("clojure" . "clj")
                              ("emacs-lisp" . "el"))
 org-confirm-elisp-link-function 'yes-or-no-p
 org-metadown-hook '(org-babel-pop-to-session-maybe)
 org-startup-truncated nil
 org-completion-use-ido t
 org-babel-load-languages '((emacs-lisp . t) (clojure . t) (sh . t)
(ruby . t) (python . t))
 org-agenda-files '("/Users/hinmanm/org/.#circuit-breaker.org"
                    "/Users/hinmanm/org/amazon-purchases.org"
"/Users/hinmanm/org/catapi.org"
                    "/Users/hinmanm/org/ch04-search.org"
"/Users/hinmanm/org/ch05-analysis.org"
                    "/Users/hinmanm/org/circuit-breaker.org"
                    "/Users/hinmanm/org/cluster-settings.org"
"/Users/hinmanm/org/companies.org"
                    "/Users/hinmanm/org/excluded-source-filter.org"
"/Users/hinmanm/org/index.org"
                    "/Users/hinmanm/org/journal.org"
"/Users/hinmanm/org/literate-es-scripts.org"
                    "/Users/hinmanm/org/malformed-in-source.org"
                    "/Users/hinmanm/org/named-queries.org"
"/Users/hinmanm/org/nested-in-all.org"
                    "/Users/hinmanm/org/notes.org"
"/Users/hinmanm/org/numeric-loading.org"
                    "/Users/hinmanm/org/simple-query-parser.org"
"/Users/hinmanm/org/todo.org"
                    "/Users/hinmanm/org/update-api-with-partial-source.org"
                    "/Users/hinmanm/org/work.org")
 org-clock-out-hook '(org-clock-remove-empty-clock-drawer)
 org-confirm-babel-evaluate nil
 org-src-fontify-natively t
 )