Subject: bug#8518: closed (Re: bug#8518: 24.0.50; 'byte-compile-error-on-warn' no effect on 'defvar ignored because X is let-bound' warning)

From: [email-masked] (GNU bug Tracking System)
Date: Tue, 19 Apr 2011 05:41:02 +0000

Your bug report

#8518: 24.0.50; 'byte-compile-error-on-warn' no effect on 'defvar ignored because X is let-bound' warning

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to [email-masked].

-- 
8518: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=8518
GNU Bug Tracking System
Contact [email-masked] with problems

Subject: Re: bug#8518: 24.0.50; 'byte-compile-error-on-warn' no effect on 'defvar ignored because X is let-bound' warning
From: David Engster <[email-masked]>
To: Glenn Morris <[email-masked]>
Cc: [email-masked]
Date: Tue, 19 Apr 2011 07:39:50 +0200
List-Id: <debbugs-submit.debbugs.gnu.org>

Glenn Morris writes:
> The warning does not come from the compiler, it comes from when the
> code is evaluated. You get the same result with:
>
> emacs -batch -L . -l ./test.el

Oh, you're right, of course. Sorry for the noise.

-David

Subject: 24.0.50; 'byte-compile-error-on-warn' no effect on 'defvar ignored because X is let-bound' warning
From: David Engster <[email-masked]>
To: [email-masked]
Date: Mon, 18 Apr 2011 11:22:40 +0200
List-Id: <debbugs-submit.debbugs.gnu.org>

Here's the recipe:

* Create files

--- test.el ----
 (eval-when-compile
   (let ((test-something nil))
     (require 'test2)))
----------------

--- test2.el ----
 (defvar test-something t)
 (provide 'test2)
-----------------

* Now byte-compile the first file with

emacs --batch -L . --eval "(setq byte-compile-error-on-warn t)" -f batch-byte-compile test.el

Output will be:

Warning: defvar ignored because test-something is let-bound
Wrote /home/user/test.elc

with an exit code 0.

* Expected behavior: batch-byte-compile should return the warning as
  an error with exit code >0.

This was tested with Emacs bzr revno. 103887.

-David