There appers to be a compatibility issue between latest org-mode and

goto-addr.el in emacs 25.1. Specifically, the 'goto-address-prog-mode

funciton. When this function is added to prog-mode-hook, opening an org

file with src blocks results in an org-mode fontification error. 

Minimal init.el used to reproduce this issue is

;; -------------- Start init.el ---------------------------------------

(require 'package)

(setq package-enable-at-startup nil)

(add-to-list 'package-archives '("org" . "http://orgmode.org/elpa/"))

(package-initialize)

(unless (package-installed-p 'org-plus-contrib)

  (package-refresh-contents)

  (package-install 'org-plus-contrib))

(require 'org)

(require 'goto-addr)

(add-hook 'prog-mode-hook 'goto-address-prog-mode)

;; ------------------------ End init.el ------------------------------

minimal test org file used to reporduce the problem

;; ----------------------- Start test.org -----------------------------

* Test

  This is a simple test org file

  #+BEGIN_SRC emacs-lisp

    (message "A Test")

  #+END_SRC

;; ------------------------ End test.org -----------------------------

used emacs -Q -l .emacs.d/init.el to load the init after ensuring .emacs.d/elpa is empty.  After startup and download/install of org-plus-contrib, open test.org and get the org-mode fontificaiton error message

Emacs  : GNU Emacs 25.1.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.18.9)

 of 2017-02-25

Package: Org mode version 9.0.5 (9.0.5-elpaplus @ /home/tim/.emacs.d/elpa/org-plus-contrib-20170210/)

current state:

==============

(setq

 org-tab-first-hook '(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-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 '((closure (*this* org-babel-confirm-evaluate-answer-no t) nil

 (add-hook (quote change-major-mode-hook)

  (quote org-babel-show-result-all) (quote append)

  (quote local))

 )

#[0 "\300\301\302\303\304$\207"

  [add-hook change-major-mode-hook org-show-block-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-eldoc-load)

 org-archive-hook '(org-attach-archive-delete-maybe)

 org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-hide-drawers

 org-cycle-show-empty-lines

 org-optimize-window-after-visibility-change)

 org-confirm-elisp-link-function 'yes-or-no-p

 org-metadown-hook '(org-babel-pop-to-session-maybe)

 org-link-parameters '(("id" :follow org-id-open)

      ("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)

      ("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") ("doi" :follow org--open-doi-link)

      ("elisp" :follow org--open-elisp-link)

      ("file" :complete org-file-complete-link)

      ("ftp" :follow

(lambda (path) (browse-url (concat "ftp:" path))))

      ("help" :follow org--open-help-link)

      ("http" :follow

(lambda (path) (browse-url (concat "http:" path))))

      ("https" :follow

(lambda (path) (browse-url (concat "https:" path))))

      ("mailto" :follow

(lambda (path) (browse-url (concat "mailto:" path))))

      ("message" :follow

(lambda (path) (browse-url (concat "message:" path))))

      ("news" :follow

(lambda (path) (browse-url (concat "news:" path))))

      ("shell" :follow org--open-shell-link))

 org-clock-out-hook '(org-clock-remove-empty-clock-drawer)

 )