Subject: bug#6373: closed (Re: bug#6275: 23.2; warning-suppress-types is void after defadvice)

From: [email-masked] (GNU bug Tracking System)
Date: Wed, 09 Jun 2010 01:28:03 +0000

Your bug report

#6275: 23.2; advice.el unbinding warning-suppress-types

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].

-- 
6275: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=6275
GNU Bug Tracking System
Contact [email-masked] with problems

Subject: Re: bug#6275: 23.2; warning-suppress-types is void after defadvice
From: Stefan Monnier <[email-masked]>
To: SAITO Takuya <[email-masked]>
Date: Tue, 08 Jun 2010 21:22:25 -0400
List-Id: <debbugs-submit.debbugs.gnu.org>

forcemerge 6275 6373
thanks

> Debugger entered--Lisp error: (void-variable warning-suppress-types)
[...]
> ad-compile-function() binds warning-suppress-types with let.
> I guess warnings.el is loaded inside of that let-binding.

Indeed, thank you.  I've installed the patch below which should fix it.

        Stefan

=== modified file 'lisp/emacs-lisp/advice.el'
--- lisp/emacs-lisp/advice.el	2010-02-15 20:03:22 +0000
+++ lisp/emacs-lisp/advice.el	2010-06-09 01:16:08 +0000
@@ -2684,6 +2684,8 @@
       ;; because `byte-compile' uses `fset':
       (ad-with-auto-activation-disabled
        (require 'bytecomp)
+       (require 'warnings)              ;To define warning-suppress-types
+                                        ;before we let-bind it.
        (let ((symbol (make-symbol "advice-compilation"))
 	     (byte-compile-warnings byte-compile-warnings)
              ;; Don't pop up windows showing byte-compiler warnings.

Subject: 23.2; advice.el unbinding warning-suppress-types
From: Kevin Ryde <[email-masked]>
To: [email-masked]
Date: Tue, 08 Jun 2010 08:54:22 +1000
List-Id: <debbugs-submit.debbugs.gnu.org>

If advice.el byte-compiles a piece of advice which causes byte compiler
warnings, then it unbinds `warning-suppress-types'.  For example

    (defun foo ()
      (message "hi"))
    (defadvice foo (after my-advice activate compile)
      (car))
    (display-warning 'bar "some thing")
    =>
    Error void-variable warning-suppress-types

It seems ad-compile-function does a let bind of warning-suppress-types
without ensuring warnings.el has been loaded.

In GNU Emacs 23.2.1 (i486-pc-linux-gnu, GTK+ Version 2.20.0)
 of 2010-05-16 on raven, modified by Debian
configured using `configure  '--build' 'i486-linux-gnu' '--build' 'i486-linux-gnu' '--prefix=/usr' '--sharedstatedir=/var/lib' '--libexecdir=/usr/lib' '--localstatedir=/var/lib' '--infodir=/usr/share/info' '--mandir=/usr/share/man' '--with-pop=yes' '--enable-locallisppath=/etc/emacs23:/etc/emacs:/usr/local/share/emacs/23.2/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/23.2/site-lisp:/usr/share/emacs/site-lisp:/usr/share/emacs/23.2/leim' '--with-x=yes' '--with-x-toolkit=gtk' '--with-toolkit-scroll-bars' 'build_alias=i486-linux-gnu' 'CFLAGS=-DDEBIAN -g -O2' 'LDFLAGS=-g' 'CPPFLAGS=''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_AU
  value of $XMODIFIERS: nil
  locale-coding-system: iso-latin-1-unix
  default enable-multibyte-characters: t