An old bug is living in Org.
=C-c C-x C-y= ~org-paste-subtree~ fails just after Emacs start.
Maybe there are more similar issues.
- Start *new* instance of emacs.
- Copy some text that is Org subtree from some
*external* application (not Emacs).
I usually come across this issue when I copy capture
from my Firefox extension. Alternative:
#+begin_src elisp :results silent
(require 'ob-shell)
#+end_src
#+begin_src bash :results silent
printf '%b' '* Heading\n\nbody\n' |
xclip -in -selection clipborad >/dev/null
# xsel --input --clipboard
#+end_src
- Try =C-c C-x C-y= or [[elisp:(org-paste-subtree)]]
+ Actual result is the following message:
: user-error: The kill is not a (set of) tree(s). Use ‘C-y’ to
yank anyway
+ Expected result is a heading pasted at the end of the buffer.
+ The result may be achieved by calling [[elisp:(org-paste-subtree)]]
once more.
- The problem is ~(and kill-ring (current-kill 0))~ expression
in the definition of ~org-paste-subtree~.
Restart emacs and repeat steps above skipping ~org-paste-subtree~.
Notice that ~(current-kill 0)~ call changes value of ~kill-ring~.
#+begin_src elisp :results pp
(list (and kill-ring t) (current-kill 0) (and kill-ring t))
#+end_src
#+RESULTS:
: (nil "* Heading\n\nbody\n" t)
I suppose, it is better to let the error from ~current-kill~ to
propagate (in the case of empty `kill-ring' and clipboard). I do not
have Windows machine available to test the change.
There is another occurence of ~(and (current-kill 0))~
in ~org-kill-is-subtree-p~. I would rather transform it
to ~org~subtree-p~ to avoid call of ~current-kill~ inside, but this
patch does not include such change.
>From 04bbf6359f370bddb6ca5fff1d8c7737e7ac5ee7 Mon Sep 17 00:00:00 2001
From: Max Nikulin <maniku...@gmail.com>
Date: Mon, 29 Nov 2021 18:54:43 +0700
Subject: [PATCH] org.el: Fix first call of `org-paste-subtree'
* lisp/org.el (org-paste-subtree): Do not check `kill-ring' before
calling `current-kill' since the latter can pull content of clipboard.
First call of `org-paste-subtree' failed if nothing had been yanked
before since Emacs start but system clipboard had text with valid
subtree originating from other application. The bug was where since
the commit adding `org-paste-subtree'.
If both `kill-ring' and system clipboard are empty then `current-kill'
generates meaningful error.
---
lisp/org.el | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lisp/org.el b/lisp/org.el
index 025513e7a..55953e97b 100644
--- a/lisp/org.el
+++ b/lisp/org.el
@@ -7774,7 +7774,7 @@ the inserted text when done.
When REMOVE is non-nil, remove the subtree from the clipboard."
(interactive "P")
- (setq tree (or tree (and kill-ring (current-kill 0))))
+ (setq tree (or tree (current-kill 0)))
(unless (org-kill-is-subtree-p tree)
(user-error
(substitute-command-keys
--
2.25.1
