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bug#10744: 24.0.93; dbus notification callback error

From: Ken Raeburn
Subject: bug#10744: 24.0.93; dbus notification callback error
Date: Mon, 06 Feb 2012 20:29:03 -0500

Using a gnome desktop environment, start emacs -Q.

M-x set-variable RET debug-on-error RET t RET
M-x load-library RET notifications RET

Have some other application send a notification (specifically, using
service org.freedesktop.Notifications), which pops up on the desktop.
(In my test case, it's another emacs process where I call
dbus-call-method in some code I wrote before finding
notifications.el. :-)

Wait for the notification to time out and go away.

An error pops up indicating that notifications-on-closed-signal is
passed one argument instead of the expected two:

Debugger entered--Lisp error: (wrong-number-of-arguments #[(id reason) ...] 1)
  apply(notifications-on-closed-signal 673)
  byte-code(... [result event dbus-message-type-error 
dbus-message-type-method-call nil dbus-check-event 2 signal dbus-error 9 apply 
8 err ...
  dbus-handle-event((dbus-event :session 4 1352 ":1.12" 
"/org/freedesktop/Notifications" "org.freedesktop.Notifications" 
"NotificationClosed" notifications-on-closed-signal 673))
  call-interactively(dbus-handle-event nil [(dbus-event :session 4 1352 ":1.12" 
"/org/freedesktop/Notifications" "org.freedesktop.Notifications" 
"NotificationClosed" notifications-on-closed-signal 673)])

It's not necessary to run any extra code relating to notifications;
simply loading the library code causes registration of the handler for
desktop notifications.

In GNU Emacs (x86_64-unknown-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2012-02-03 on just-testing.permabit.com
Windowing system distributor `The X.Org Foundation', version 11.0.10402000
Configured using:
 `configure '--prefix=/permabit/user/raeburn/I64/install/emacs-24.0.93'

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: C
  value of $XMODIFIERS: nil
  locale-coding-system: nil
  default enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
<help-echo> <help-echo> <help-echo> C-f C-f C-a C-e 
C-p C-n C-n C-f C-f M-x i e l m <return> M-x C-g ( 
s e t C-g M-x v <backspace> s a t <backspace> <backspace> 
e t - v a r <tab> <return> d e b u g - o n - e r r 
o r <return> t <return> <backspace> <backspace> <backspace> 
l o a d - l i b r a r y SPC " n o t i f i c a t i o 
n s " ) <return> C-x 5 2 <switch-frame> C-h f n o t 
i f i c a t i o n s - n o t <tab> <return> C-x o C-n 
C-u C-f <return> C-x 1 <help-echo> <help-echo> <down-mouse-1> 
<mouse-movement> <mouse-1> C-x k <return> C-x 5 0 <down-mouse-1> 
<mouse-1> C-x m M-> <return> C-x o M-< M-> M-w C-x 
o C-y M-< C-u C-n C-n C-n C-u C-u C-b C-u C-f C-u C-f 
C-b C-SPC C-M-f C-M-f C-n C-n C-n C-p C-u C-f C-f C-f 
C-f C-f C-w . . . C-u C-u C-b C-u C-b C-u C-f C-M-SPC 
C-g C-b C-b C-f C-f C-M-f C-b C-SPC C-p C-p C-u C-u 
C-f C-u C-u C-b C-u C-u C-b C-u C-u C-b C-u C-b C-u 
C-f C-u C-f C-b C-w C-a C-n C-n C-n C-u C-u C-k C-x 
o C-x C-g q C-p C-p C-x k <return> M-x s e n d b u 
<tab> <backspace> <backspace> - b <tab> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
C-g M-x r e p o r t - <tab> <return>

Recent messages:
call-interactively: End of buffer [2 times]
Quit [2 times]
Loading notifications...done
Type C-x 1 to delete the help window, C-M-v to scroll help.
uncompressing notifications.el.gz...done
Entering debugger...
Mark set [7 times]
Mark set
Back to top level.

Load-path shadows:
None found.

(shadow sort mail-extr emacsbug gnus-util message format-spec rfc822 mml
mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 rfc2047 rfc2045
ietf-drums mm-util mail-prsvr mailabbrev mail-utils gmm-utils mailheader
debug jka-compr find-func help-mode view notifications dbus xml cus-edit
easymenu wid-edit cus-start cus-load help-fns ielm pp comint regexp-opt
ring time-date tooltip ediff-hook vc-hooks lisp-float-type mwheel x-win
x-dnd tool-bar dnd fontset image fringe lisp-mode register page menu-bar
rfn-eshadow timer select scroll-bar mouse jit-lock font-lock syntax
facemenu font-core frame cham georgian utf-8-lang misc-lang vietnamese
tibetan thai tai-viet lao korean japanese hebrew greek romanian slovak
czech european ethiopic indian cyrillic chinese case-table epa-hook
jka-cmpr-hook help simple abbrev minibuffer loaddefs button faces
cus-face files text-properties overlay sha1 md5 base64 format env
code-pages mule custom widget hashtable-print-readable backquote
make-network-process dbusbind dynamic-setting font-render-setting
x-toolkit x multi-tty emacs)

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