Debugger entered--Lisp error: (wrong-type-argument number-or-marker-p nil)
  <=(13 nil)
  (cond ((>= ... lim-down) (throw ... ...)) ((get-text-property ... ...) (goto-char ...)) ((and ... ...) (throw ... ...)) ((looking-at "^[ 	]*#\\+begin_") (re-search-forward "^[ 	]*#\\+end_") (forward-line 1)) ((looking-at drawers-re) (re-search-forward "^[ 	]*:END:" nil t) (forward-line 1)) ((and inlinetask-re ...) (org-inlinetask-goto-end)) ((looking-at "^[ 	]*$") (forward-line 1)) ((looking-at item-re) (push ... itm-lst-2) (push ... end-lst-2) (forward-line 1)) ((eq org-list-ending-method ...) (forward-line 1)) ((<= ind ...) (throw ... ...)) ((<= ind ...) (push ... end-lst-2) (forward-line 1)) (t (forward-line 1)))
  (let ((ind ...)) (cond (... ...) (... ...) (... ...) (... ... ...) (... ... ...) (... ...) (... ...) (... ... ... ...) (... ...) (... ...) (... ... ...) (t ...)))
  (while t (let (...) (cond ... ... ... ... ... ... ... ... ... ... ... ...)))
  (catch (quote exit) (while t (let ... ...)))
  (let* ((case-fold-search t) (context ...) (lim-up ...) (lim-down ...) (text-min-ind 10000) (item-re ...) (drawers-re ...) (inlinetask-re ...) (beg-cell ...) ind itm-lst itm-lst-2 end-lst end-lst-2 struct (assoc-at-point ...) (end-before-blank ...)) (save-excursion (catch ... ...)) (catch (quote exit) (while t ...)) (setq struct (append itm-lst ...)) (setq end-lst (append end-lst ...)) (let (...) (mapc ... struct)) (org-list-struct-assoc-end struct end-lst) struct)
  (save-excursion (beginning-of-line) (let* (... ... ... ... ... ... ... ... ... ind itm-lst itm-lst-2 end-lst end-lst-2 struct ... ...) (save-excursion ...) (catch ... ...) (setq struct ...) (setq end-lst ...) (let ... ...) (org-list-struct-assoc-end struct end-lst) struct))
  org-list-struct()
  (let* ((struct ...) (prevs ...) (s ...)) (setq struct (org-list-insert-item ... struct prevs nil s)) (org-list-write-struct struct (org-list-parents-alist struct)) (looking-at org-list-full-item-re) (goto-char (match-end 0)))
  (cond ((and itemp ...) (let* ... ... ... ... ...)) (itemp (error "This is not a timer list")) (t (beginning-of-line) (org-indent-line-function) (insert "- ") (org-timer ...) (insert ":: ")))
  (let ((itemp ...)) (cond (... ...) (itemp ...) (t ... ... ... ... ...)))
  org-timer-item()
  (progn (org-timer-item) t)
  (if (save-excursion (goto-char itemp) (org-at-item-timer-p)) (progn (org-timer-item) t) (goto-char itemp) (let* (... ... ... ...) (setq struct ...) (org-list-write-struct struct ...) (when checkp ...) (looking-at org-list-full-item-re) (goto-char ...) t))
  (if (or (not itemp) (save-excursion ... ...)) nil (if (save-excursion ... ...) (progn ... t) (goto-char itemp) (let* ... ... ... ... ... ... t)))
  (unless (or (not itemp) (save-excursion ... ...)) (if (save-excursion ... ...) (progn ... t) (goto-char itemp) (let* ... ... ... ... ... ... t)))
  (let ((itemp ...) (pos ...)) (unless (or ... ...) (if ... ... ... ...)))
  org-insert-item()
  (not (org-insert-item))
  (or force-heading (not (org-insert-item)))
  (if (or force-heading (not ...)) (progn (let* ... ... ... ... ... ... ... ... ...)))
  (when (or force-heading (not ...)) (let* (... ... ... ... ... ... pos hide-previous previous-pos) (cond ... ... ...) (insert head) (just-one-space) (setq pos ...) (end-of-line 1) (unless ... ... ...) (when ... ...) (run-hooks ...)))
  (if (or (= ... 0) (and ... ...)) (progn (insert "\n* ") (run-hooks ...)) (when (or force-heading ...) (let* ... ... ... ... ... ... ... ... ...)))
  org-insert-heading(nil)
  call-interactively(org-insert-heading)
  (cond ((run-hook-with-args-until-success ...)) ((org-at-table-p) (call-interactively ...)) (t (call-interactively ...)))
  org-meta-return(nil)
  call-interactively(org-meta-return)
  recursive-edit()
  byte-code("Æ	@Ç=! ÈÉÊ\"ËÉ!A@)¢Ì=! ÈÍÊ\"Î!Ï Ð	!\fc Ñed\"VW ebÒ¥y`dbÒ¥Zy`|)ÓcebÔÕÖ \"× ÔØ!ÙÊÔØ!Ú +Ù" [unread-command-char debugger-args x debugger-buffer noninteractive debugger-batch-max-lines -1 debug backtrace-debug 4 t backtrace-frame lambda 5 pop-to-buffer debugger-mode debugger-setup-buffer count-lines 2 "...\n" message "%s" buffer-string kill-emacs "" nil recursive-edit middlestart buffer-read-only standard-output] 4)
  debug(error (wrong-type-argument number-or-marker-p nil))
  byte-code("Æ`Ç\" ÈÉ \\`	Y! ÊËÈ\n BB\"æ Æ`Ì\"3 Í`ÌÎ	$bæ \fÏ=M Ð!M ÊËÈ`BB\"æ ÐÑ!] ÒÓ!Ôyæ Ð!p ÒÕÎÖ#Ôyæ  Ð! × æ ÐØ! Ôyæ Ð!ª !B`BBÔyæ \fÙ=¶ Ôyæ AXÍ ÊËÈ\n BB\"address@hidden@Xã `BBÔyæ Ôy)  " [ind lim-down end-before-blank end-lst-2 org-list-ending-method org-list-end-re get-text-property original-indentation 0 org-get-indentation throw exit org-example next-single-property-change nil indent looking-at "^[ 	]*#\\+begin_" re-search-forward "^[ 	]*#\\+end_" 1 "^[ 	]*:END:" t org-inlinetask-goto-end "^[ 	]*$" regexp drawers-re inlinetask-re item-re assoc-at-point itm-lst-2 beg-cell] 5)
  org-list-struct()
  org-timer-item()
  org-insert-item()
  org-insert-heading(nil)
  call-interactively(org-insert-heading)
  org-meta-return(nil)
  call-interactively(org-meta-return)