Not a bug. See inline.
> On Sep 3, 2020, at 12:37 AM, Enze Chi <enze.chi@gmail.com> wrote:
>
>
> 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.
> ------------------------------------------------------------------------
>
> I have a org file like this (test_tangle.org):
>
> #+begin_src emacs-lisp
> (setq foo "hello") ;
> #+end_src
>
There was no :tangle header arg specified for this block. Hence it is never tangled. I believe this is well documented in the manual.
Running `org-babel-view-src-block-info' (C-c C-v C-i) with point in the src block will confirm this this by listing the header args including `:tangle no'
If you want all src blocks to be tangled, you should study
(info "(org) Using Header Arguments")
to set a system-wide or buffer wide default.
HTH,
Chuck
> #+begin_src emacs-lisp :tangle yes
> (setq bar "world")
> #+end_src
>
>
> After I run "(org-babel-tangle nil nil)"
>
> I expect both of them are tangled to "test_tangle.el":
>
> (setq foo "hello")
> (setq bar "world")
>
>
> But I only got:
>
> (setq bar "world")
>
>
>
> Emacs : GNU Emacs 27.1.50 (build 1, x86_64-apple-darwin19.6.0, NS appkit-1894.60 Version 10.15.6 (Build 19G73))
> of 2020-08-14
> Package: Org mode version 9.4 (nil @ /Users/ezchi/.emacs.d/.local/straight/build/org-mode/)
>
> 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-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-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-babel-pre-tangle-hook '(save-buffer)
> org-tab-first-hook '(org-babel-hide-result-toggle-maybe
> org-babel-header-arg-expand)
> org-agenda-loop-over-headlines-in-active-region nil
> org-occur-hook '(org-first-headline-recenter)
> 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-export-before-parsing-hook '(org-attach-expand-links)
> org-confirm-shell-link-function 'yes-or-no-p
> org-link-parameters '(("attachment" :follow org-attach-follow :complete
> org-attach-complete-link)
> ("id" :follow org-id-open)
> ("eww" :follow org-eww-open :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
> #[514 "\301\300\302Q\"\207"
> ["news" browse-url ":"] 6 "\n\n(fn URL ARG)"]
> )
> ("mailto" :follow
> #[514 "\301\300\302Q\"\207"
> ["mailto" browse-url ":"] 6 "\n\n(fn URL ARG)"]
> )
> ("https" :follow
> #[514 "\301\300\302Q\"\207"
> ["https" browse-url ":"] 6 "\n\n(fn URL ARG)"]
> )
> ("http" :follow
> #[514 "\301\300\302Q\"\207"
> ["http" browse-url ":"] 6 "\n\n(fn URL ARG)"]
> )
> ("ftp" :follow
> #[514 "\301\300\302Q\"\207" ["ftp" browse-url ":"]
> 6 "\n\n(fn URL ARG)"]
> )
> ("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-link-elisp-confirm-function 'yes-or-no-p
> )
>