GNU bug report logs - #20123
24.4.91; Unwarranted "Unused lexical argument" for condition-case

Previous Next

To add a comment to this bug, you must first unarchive it, by sending
a message to control AT debbugs.gnu.org, with unarchive 20123 in the body.
You can then email your comments to 20123 AT debbugs.gnu.org in the normal way.

Toggle the display of automated, internal messages from the tracker.

Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Oleh Krehel <ohwoeowho <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.4.91; Unwarranted "Unused lexical argument" for condition-case
Date: Mon, 16 Mar 2015 19:42:39 +0100

Hello,

Here's an example code:

    (define-error 'unsupported-mode-error "Unsupported mode")
    (condition-case e
        (if (eq 'a 'a)
            (message "test")
          (signal 'unsupported-mode-error major-mode))
      (unsupported-mode-error
       (signal (car e) (cdr e)))
      (error
       (message "error")))

As you can see, I'm trying to re-throw some of the errors, so the variable `e' is used
inside `condition-case'. But I still get an "Unused lexical argument" warning.

regards,
Oleh

Message #8 received at 20123 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Oleh Krehel <ohwoeowho <at> gmail.com>
Cc: 20123 <at> debbugs.gnu.org
Subject: Re: bug#20123: 24.4.91;
 Unwarranted "Unused lexical argument" for condition-case
Date: Mon, 16 Mar 2015 14:57:12 -0400

Dupe of http://debbugs.gnu.org/15103

Message #13 received at 20123 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> IRO.UMontreal.CA>
To: Oleh Krehel <ohwoeowho <at> gmail.com>
Cc: 20123 <at> debbugs.gnu.org
Subject: Re: bug#20123: 24.4.91;
 Unwarranted "Unused lexical argument" for condition-case
Date: Mon, 16 Mar 2015 15:09:13 -0400

> Hello,
> Here's an example code:

>     (define-error 'unsupported-mode-error "Unsupported mode")
>     (condition-case e
>         (if (eq 'a 'a)
>             (message "test")
>           (signal 'unsupported-mode-error major-mode))
>       (unsupported-mode-error
>        (signal (car e) (cdr e)))
>       (error
>        (message "error")))

> As you can see, I'm trying to re-throw some of the errors, so the variable `e' is used
> inside `condition-case'. But I still get an "Unused lexical argument" warning.

Yes, IIRC this bug was introduced in 24.1.  It should be partially fixed
in 24.4 if you set byte-compile--use-old-handlers to nil.  It should be
fixed in 25.1 where this var defaults to nil.

Can you confirm?


        Stefan

Message #16 received at 20123 <at> debbugs.gnu.org (full text, mbox):

From: Oleh Krehel <ohwoeowho <at> gmail.com>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: 20123 <at> debbugs.gnu.org
Subject: Re: bug#20123: 24.4.91;
 Unwarranted "Unused lexical argument" for condition-case
Date: Mon, 16 Mar 2015 20:15:07 +0100

Hi Stefan,

On Mon, Mar 16, 2015 at 8:09 PM, Stefan Monnier
<monnier <at> iro.umontreal.ca> wrote:

> Yes, IIRC this bug was introduced in 24.1.  It should be partially fixed
> in 24.4 if you set byte-compile--use-old-handlers to nil.  It should be
> fixed in 25.1 where this var defaults to nil.
>
> Can you confirm?

I can confirm that this is fixed in 25.1, thanks. Sorry for the noise.

Oleh

Message #21 received at 20123-done <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> IRO.UMontreal.CA>
To: Oleh Krehel <ohwoeowho <at> gmail.com>
Cc: 20123-done <at> debbugs.gnu.org
Subject: Re: bug#20123: 24.4.91;
 Unwarranted "Unused lexical argument" for condition-case
Date: Mon, 16 Mar 2015 16:22:12 -0400

Version: 25.1

> I can confirm that this is fixed in 25.1, thanks. Sorry for the noise.

Thanks,


        Stefan

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.