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[debbugs-tracker] bug#29857: closed (27.0.50; error: "Loading `nil': old


From: GNU bug Tracking System
Subject: [debbugs-tracker] bug#29857: closed (27.0.50; error: "Loading `nil': old-style backquotes detected!")
Date: Sun, 07 Jan 2018 13:28:02 +0000

Your message dated Sun, 07 Jan 2018 13:26:46 +0000
with message-id <address@hidden>
and subject line Re: bug#29857: 27.0.50; error: "Loading `nil': old-style 
backquotes detected!"
has caused the debbugs.gnu.org bug report #29857,
regarding 27.0.50; error: "Loading `nil': old-style backquotes detected!"
to be marked as done.

(If you believe you have received this mail in error, please contact
address@hidden)


-- 
29857: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=29857
GNU Bug Tracking System
Contact address@hidden with problems
--- Begin Message --- Subject: 27.0.50; error: "Loading `nil': old-style backquotes detected!" Date: Tue, 26 Dec 2017 15:38:42 +0100
Hello,

Insert into a fresh buffer (e.g. *scratch*):

#+begin_src emacs-lisp
`(progn
   (add-to-list 'rcirc-client-commands ,(concat "/" (symbol-name command)))
   (defun ,(intern (concat "rcirc-cmd-" (symbol-name command)))
       (,@argument &optional process target)
     ,(concat docstring "\n\nNote: If PROCESS or TARGET are nil, the values 
given"
              "\nby `rcirc-buffer-process' and `rcirc-target' will be used.")
     ,interactive-form
     (let ((process (or process (rcirc-buffer-process)))
           (target (or target rcirc-target)))
       (ignore target) ; mark `target' variable as ignorable
       ,@body)))
#+end_src

(that's the body of the `defun-rcirc-command' macro in rcirc.el).  Put
point after the starting backquote character, at the position of the
outermost opening paren.  Then (read (current-buffer)) errors with

| Debugger entered--Lisp error: (error "Loading `nil': old-style backquotes 
detected!")
|   read(#<buffer *scratch*>)
|   [...]

I think raising this error is not justified, as there are no old-style
backquotes there AFAIK.  Also, the error message saying loading `nil'
failed is confusing, it took me a while to find out where I tried to
load `nil' (nowhere).

Finally, let me say that `read' raising such errors about old-style
backquotes, may it be justified or not, breaks "el-search" which relies
heavily on `read' at diverse buffer positions to succeed.


TIA,

Michael.



In GNU Emacs 27.0.50 (build 25, x86_64-pc-linux-gnu, GTK+ Version 3.22.24)
 of 2017-12-21 built on drachen
Repository revision: e45499a6c1bae4577af2e86397e9bab23fd63bf1
Windowing system distributor 'The X.Org Foundation', version 11.0.11905000
System Description: Debian GNU/Linux testing (buster)




--- End Message ---
--- Begin Message --- Subject: Re: bug#29857: 27.0.50; error: "Loading `nil': old-style backquotes detected!" Date: Sun, 07 Jan 2018 13:26:46 +0000


Michael Heerdegen <address@hidden> schrieb am Sa., 30. Dez. 2017 um 23:33 Uhr:
Hi Philipp,

thanks for working on this.

>  > It would be reasonable and easy to remove the "Loading `nil'" part in
>  > the case where no file is being loaded.
>
>  Yes, I think that would be good.
>
> OK, I've sent a patch to do that:
> https://lists.gnu.org/archive/html/emacs-devel/2017-12/msg00901.html

Yes, that should be ok, I think.

>  > Otherwise I'd accept introducing a variable to control whether
>  > oldstyle backquotes should raise an error or get interpreted as
>  > newstyle.
>
>  That would be optimal for my case.
>
> I've sent a patch for this as well:
> https://lists.gnu.org/archive/html/emacs-devel/2017-12/msg00902.html

Thanks.  Looks like it does what I want.


OK, I've now pushed both patches to master. 

--- End Message ---

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