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

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

From: David Engster <deng <at> randomsample.de>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.0.50;
	'byte-compile-error-on-warn' no effect on 'defvar ignored because X
	is let-bound' warning
Date: Mon, 18 Apr 2011 11:22:40 +0200

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

Message #8 received at 8518 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: David Engster <deng <at> randomsample.de>
Cc: 8518 <at> debbugs.gnu.org
Subject: Re: bug#8518: 24.0.50;
	'byte-compile-error-on-warn' no effect on 'defvar ignored because X
	is let-bound' warning
Date: Mon, 18 Apr 2011 13:37:45 -0400

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

Message #13 received at 8518-done <at> debbugs.gnu.org (full text, mbox):

From: David Engster <deng <at> randomsample.de>
To: Glenn Morris <rgm <at> gnu.org>
Cc: 8518-done <at> debbugs.gnu.org
Subject: Re: bug#8518: 24.0.50;
	'byte-compile-error-on-warn' no effect on 'defvar ignored because X
	is let-bound' warning
Date: Tue, 19 Apr 2011 07:39:50 +0200

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

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