Bug: crash exporing to html [9.3 (release_9.3 @ /usr/share/emacs/27.1/lisp/org/)]

[Greg Minshall]

one line in why.org:
----
call_find-orgs()
----

then
----
emacs -Q
----

then
----
C-e h h
----

then
----
Debugger entered--Lisp error: (wrong-type-argument consp nil)
  org-babel-exp-code(nil lob)
  org-babel-exp-do-export(nil lob)
  org-babel-exp-process-buffer()
  org-export-as(html nil nil nil (:output-file "why.html"))
  org-export-to-file(html "why.html" nil nil nil nil nil)
  org-html-export-to-html(nil nil nil nil)
  org-export-dispatch(nil)
  funcall-interactively(org-export-dispatch nil)
  call-interactively(org-export-dispatch nil nil)
  command-execute(org-export-dispatch)

cheers.

Remember to cover the basics, that is, what you expected to happen and
what in fact did happen.  You don't know how to make a good report?  See

     https://orgmode.org/manual/Feedback.html#Feedback

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



Emacs  : GNU Emacs 27.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.22, 
cairo version 1.17.3)
 of 2020-08-28
Package: Org mode version 9.3 (release_9.3 @ /usr/share/emacs/27.1/lisp/org/)

current state:
==============
(setq
 org-src-mode-hook '(org-src-babel-configure-edit-buffer 
org-src-mode-configure-edit-buffer)
 org-link-shell-confirm-function 'yes-or-no-p
 org-metadown-hook '(org-babel-pop-to-session-maybe)
 org-clock-out-hook '(org-clock-remove-empty-clock-drawer)
 org-html-format-inlinetask-function 
'org-html-format-inlinetask-default-function
 org-odt-format-headline-function 'org-odt-format-headline-default-function
 org-ascii-format-inlinetask-function 'org-ascii-format-inlinetask-default
 org-mode-hook '(#[0 "\300\301\302\303\304$\207" [add-hook 
change-major-mode-hook org-show-all append local] 5]
                 #[0 "\300\301\302\303\304$\207"
                   [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-odt-format-drawer-function #[514 "\207" [] 3 "\n\n(fn NAME CONTENTS)"]
 org-archive-hook '(org-attach-archive-delete-maybe)
 org-confirm-elisp-link-function 'yes-or-no-p
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-metaup-hook '(org-babel-load-in-session-maybe)
 org-bibtex-headline-format-function #[257 "\300
\236A\207" [:title] 3 "\n\n(fn 
ENTRY)"]
 org-latex-format-drawer-function #[514 "\207" [] 3 "\n\n(fn _ CONTENTS)"]
 org-babel-pre-tangle-hook '(save-buffer)
 org-tab-first-hook '(org-babel-hide-result-toggle-maybe 
org-babel-header-arg-expand)
 org-ascii-format-drawer-function #[771 "
\207" [] 4 "\n\n(fn NAME CONTENTS 
WIDTH)"]
 org-occur-hook '(org-first-headline-recenter)
 org-export-coding-system 'utf-8
 org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-show-empty-lines
                  org-optimize-window-after-visibility-change)
 org-speed-command-hook '(org-speed-command-activate 
org-babel-speed-command-activate)
 org-odt-format-inlinetask-function 'org-odt-format-inlinetask-default-function
 org-confirm-shell-link-function 'yes-or-no-p
 org-link-parameters '(("attachment" :follow org-attach-open-link :export 
org-attach-export-link :complete
                        org-attach-complete-link)
                       ("id" :follow org-id-open) ("eww" :follow eww :store 
org-eww-store-link)
                       ("rmail" :follow org-rmail-open :store 
org-rmail-store-link)
                       ("mhe" :follow org-mhe-open :store org-mhe-store-link)
                       ("irc" :follow org-irc-visit :store org-irc-store-link 
:export org-irc-export)
                       ("info" :follow org-info-open :export org-info-export 
:store org-info-store-link)
                       ("gnus" :follow org-gnus-open :store org-gnus-store-link)
                       ("docview" :follow org-docview-open :export 
org-docview-export :store
                        org-docview-store-link)
                       ("bibtex" :follow org-bibtex-open :store 
org-bibtex-store-link)
                       ("bbdb" :follow org-bbdb-open :export org-bbdb-export 
:complete org-bbdb-complete-link
                        :store org-bbdb-store-link)
                       ("w3m" :store org-w3m-store-link) ("file+sys") 
("file+emacs")
                       ("shell" :follow org-link--open-shell)
                       ("news" :follow #[257 "\301\300\302Q!\207" ["news" 
browse-url ":"] 5 "\n\n(fn URL)"])
                       ("mailto" :follow #[257 "\301\300\302Q!\207" ["mailto" 
browse-url ":"] 5 "\n\n(fn URL)"])
                       ("https" :follow #[257 "\301\300\302Q!\207" ["https" 
browse-url ":"] 5 "\n\n(fn URL)"])
                       ("http" :follow #[257 "\301\300\302Q!\207" ["http" 
browse-url ":"] 5 "\n\n(fn URL)"])
                       ("ftp" :follow #[257 "\301\300\302Q!\207" ["ftp" 
browse-url ":"] 5 "\n\n(fn URL)"])
                       ("help" :follow org-link--open-help) ("file" :complete 
org-link-complete-file)
                       ("elisp" :follow org-link--open-elisp) ("doi" :follow 
org-link--open-doi))
 org-latex-format-headline-function 'org-latex-format-headline-default-function
 org-link-elisp-confirm-function 'yes-or-no-p
 org-latex-format-inlinetask-function 
'org-latex-format-inlinetask-default-function
 org-html-format-drawer-function #[514 "\207" [] 3 "\n\n(fn NAME CONTENTS)"]
 org-html-format-headline-function 'org-html-format-headline-default-function
 )
-- 
Greg Minshall <minshall@umich.edu>