Hello Org's developpers,

Some time ago I tried to export in html form an org file containing many
src blocks and ended with the following message :

org-html-do-format-code: Buffer is read-only: #<killed buffer>

After narrowing down my file here are the steps to reproduce :

emacs -q
(require 'htmlize) ;; this is important else `org-html-fontify-code`
                   ;; will keep the wrong branch

;; open the ecm-org-src-ro.org ([1])
;; try to export as html

I've also attached a patch ([2]) to fix this.

I've also opened the bug 41641 with the sames informations.

Pierre