bug#1112: 23.0.60; Child process not cleaned up properly

[Brent Goodrick]

Please write in English if possible, because the Emacs maintainers
usually do not have translators to read other languages for them.

Your bug report will be posted to the emacs-pretest-bug@gnu.org mailing list.

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

1. M-x compile
2. Enter in: sudo apt-get install gimp-help-en
3. See the apt-get prompt:
   Reading package lists... 0%
   <snip>
   The following extra packages will be installed:
     gimp-help-common
   The following NEW packages will be installed:
     gimp-help-common gimp-help-en
   0 upgraded, 2 newly installed, 0 to remove and 1 not upgraded.
   Need to get 15.9MB of archives.
   After this operation, 27.5MB of additional disk space will be used.
   Do you want to continue [Y/n]?
4. Kill the buffer, and expect the underlying process to die, just
   like you would have if you had typed the above command in a shell
   buffer.
5. Open up a shell, and type ps to see that the apt-get process still
   exists
6. Go through step 1 again and notice now that a lock is being
   reported by the second apt-get session because the first process
   was not properly torn down by the act of killing the previous
   compilation buffer.

My assessment: The shell mode somehow works differently than the
compilation mode since the compilation mode does not allow user
input. Fair enough, but the two modes should work the same in terms of
tearing down the two processes if the buffers are killed, and should
not ever leave dormant child processes.

If Emacs crashed, and you have the Emacs process in the gdb debugger,
please include the output from the following gdb commands:
    `bt full' and `xbacktrace'.
If you would like to further debug the crash, please read the file
/home/brentg/emacs_from_source/install/share/emacs/23.0.60/etc/DEBUG
for instructions.

Emacs did not crash.

In GNU Emacs 23.0.60.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.12.11)
 of 2008-10-03 on hungover
Windowing system distributor `The X.Org Foundation', version 11.0.10402000
configured using `configure  '--with-x-toolkit' '--with-xft'
'--prefix=/home/brentg/emacs_from_source/install''

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_US.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default-enable-multibyte-characters: t

Major mode: Apropos

Minor modes in effect:
  desktop-save-mode: t
  iswitchb-mode: t
  erc-services-mode: t
  erc-networks-mode: t
  display-time-mode: t
  shell-dirtrack-mode: t
  delete-selection-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  global-auto-composition-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: 1
  transient-mark-mode: t

Recent input:
o m p i <return> C-1 d C-x h <backspace> <return> M-P
<return> C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p
C-p C-a C-n C-f C-f C-f C-f C-f C-f C-f C-f C-f C-f
C-f C-b C-b C-M-SPC C-z M-> C-4 M-P <return> k i l
l C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-a
C-n C-n C-n C-n C-p C-p C-p C-p C-n C-f C-f C-f C-f
C-f C-f C-f C-f C-f C-M-SPC C-z M-> SPC C-v C-a <return>
M-P C-a s u d i <backspace> o SPC <return> C-4 M-P
C-k C-g C-v <return> C-1 C-c d p s f <return> C-r a
p t - C-g C-g M-> a p t = g e t <backspace> <backspace>
<backspace> <backspace> <C-backspace> C-r a p t - g
e t C-g C-f M-> M-x a p r o <tab> <return> p t y <backspace>
t y <backspace> <backspace> y <return> C-x o C-s c
o m i n t C-b <return> C-x o C-M-SPC C-z C-c d C-x
h <backspace> M-P SPC | SPC g r e p SPC a p t - g e
t <return> M-x M-P C-g C-4 M-p <return> C-x o M-: C-v
<return> <down-mouse-1> <mouse-1> C-1 M-P <return>
s u d o SPC k i l l SPC a p t = <backspace> - g e t
<backspace> <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> 1 2 2 5 <backspace> 6 0 <return>
M-x a p r o <tab> <return> e m a c s . * f <backspace>
b u g <return> C-x o C-n C-n C-n C-n C-n C-n C-n C-n
C-n C-n <return> M-x r e p o r t - e m a c s = <backspace>
- b u g <tab> <return>

Recent messages:
Not applicable. It is repeatable.