[O] Bug: org-babel-tangle-comment-links does not honor org-babel-tangle-uncomment-comments in noweb comments [9.1.9 (release_9.1.9-65-g5e4542 @ /usr/local/share/emacs/26.2/lisp/org/)]

[immanuel]

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.
------------------------------------------------------------------------

Try the following code;
#+NAME: start
#+BEGIN_SRC emacs-lisp :tangle no
(message "start")
#+END_SRC

#+NAME: end
#+BEGIN_SRC emacs-lisp :tangle no
(message "end")
#+END_SRC

#+BEGIN_SRC emacs-lisp :tangle output.el :comments noweb :noweb yes
start
<<start>>
end
<<end>>
#+END_SRC

#+BEGIN_SRC emacs-lisp :tangle no
(let ((org-babel-tangle-comment-format-beg "start %start-line\n")
      (org-babel-tangle-comment-format-end "end %start-line\n")
      (org-babel-tangle-uncomment-comments t))
  (org-babel-tangle-file (buffer-file-name))
  (with-temp-buffer 
  (insert-file-contents "output.el")
  (buffer-string)))
#+END_SRC

#+RESULTS:
#+begin_example
start 71
start
;; start 285
(message "start")
;; end 285
;; start 1256
(message "start")
;; end 1256
end
;; start 360
(message "end")
;; end 360
;; start 1331
(message "end")
;; end 1331
end 71
#+end_example

You see the noweb comments are commented out. The reason is this cl-wrap
definition in org-babel-expand-noweb-references.

#+BEGIN_SRC emacs-lisp
(let ..
   (c-wrap (lambda (text)
                   (with-temp-buffer
                     (funcall (intern (concat lang "-mode")))
                     (comment-region (point) (progn (insert text) (point)))
                     (org-trim (buffer-string))))))
#+END_SRC



Emacs  : GNU Emacs 26.2 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.22.30)
 of 2019-07-17
Package: Org mode version 9.1.9 (release_9.1.9-65-g5e4542 @ 
/usr/local/share/emacs/26.2/lisp/org/)

current state:
==============
(setq
 org-src-mode-hook '(org-src-babel-configure-edit-buffer 
org-src-mode-configure-edit-buffer)
 org-after-todo-state-change-hook '(org-clock-out-if-current)
 org-latex-listings t
 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-plantuml-jar-path "/home/immanuel/bin/plantuml.jar"
 org-mode-hook '(#[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 
auto-fill-mode)
 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-from-is-user-regexp "\\<immanuel@prometheus\\>\\|\\<immanuel\\>"
 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-babel-load-languages '((emacs-lisp . t) (C . t) (python . t) (lilypond . 
t) (shell . t) (plantuml . t))
 org-log-done 'time
 org-ascii-format-drawer-function #[771 "\207" [] 4 "\n\n(fn NAME CONTENTS 
WIDTH)"]
 org-babel-python-command "ipython --simple-prompt -i --pylab"
 org-src-preserve-indentation t
 org-occur-hook '(org-first-headline-recenter)
 org-structure-template-alist '(("r" "#+BEGIN_SRC rust\n?\n#+END_SRC") ("p" 
"#+BEGIN_SRC plantuml\n?\n#+END_SRC")
                                ("ha" "#+BEGIN_SRC haskell\n?\n#+END_SRC")
                                ("ly"
                                 "#+LaTeX: \\linebreak\n#+ATTR_LaTeX: 
width=17cm\n#+BEGIN_SRC lilypond :file ?.png :noweb yes\n#+END_SRC")
                                ("bnf" "#+BEGIN_SRC abnf\n?\n#+END_SRC")
                                ("cpp"
                                 "#+NAME:\n#+HEADER: :tangle\n#+HEADER: :main 
no\n#+HEADER: :noeval\n#+HEADER: :noweb yes\n#+BEGIN_SRC cpp\n?\n#+END_SRC")
                                ("yp" "#+END_SRC\n?\n#+BEGIN_SRC python :noweb 
yes")
                                ("py" "#+BEGIN_SRC python :noweb 
yes\n?\n#+END_SRC") ("ab" "#+END_SRC\n#+BEGIN_SRC bash")
                                ("ba" "#+BEGIN_SRC bash?\n#+END_SRC") ("le" 
"#+END_SRC\n#+BEGIN_SRC emacs-lisp?")
                                ("el" "#+BEGIN_SRC emacs-lisp\n?\n#+END_SRC") 
("s" "#+BEGIN_SRC ?\n\n#+END_SRC")
                                ("e" "#+BEGIN_EXAMPLE\n?\n#+END_EXAMPLE") ("q" 
"#+BEGIN_QUOTE\n?\n#+END_QUOTE")
                                ("v" "#+BEGIN_VERSE\n?\n#+END_VERSE") ("V" 
"#+BEGIN_VERBATIM\n?\n#+END_VERBATIM")
                                ("c" "#+BEGIN_CENTER\n?\n#+END_CENTER") ("C" 
"#+BEGIN_COMMENT\n?\n#+END_COMMENT")
                                ("l" "#+BEGIN_EXPORT latex\n?\n#+END_EXPORT") 
("L" "#+LaTeX: ")
                                ("h" "#+BEGIN_EXPORT html\n?\n#+END_EXPORT") 
("H" "#+HTML: ")
                                ("a" "#+BEGIN_EXPORT ascii\n?\n#+END_EXPORT") 
("A" "#+ASCII: ") ("i" "#+INDEX: ?")
                                ("I" "#+INCLUDE: %file ?"))
 org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-hide-drawers 
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-babel-tangle-lang-exts '(("LilyPond" . "ly") ("python" . "py") ("D" . "d") 
("C++" . "cpp") ("emacs-lisp" . "el")
                              ("elisp" . "el"))
 org-latex-image-default-width nil
 org-confirm-shell-link-function 'yes-or-no-p
 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))))
                       ("news" :follow (lambda (path) (browse-url (concat 
"news:"; path))))
                       ("shell" :follow org--open-shell-link))
 org-latex-format-headline-function 'org-latex-format-headline-default-function
 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-latex-packages-alist '(("" "color") ("" "listings"))
 org-html-format-headline-function 'org-html-format-headline-default-function
 org-src-window-setup 'other-window
 org-confirm-babel-evaluate 'il-org-confirm-babel-evaluate
 )