bug#3998: 23.1; process status

bug#3998: 23.1; process status

[Dieter Wilhelm, H.]

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 bug-gnu-emacs@gnu.org mailing list,
and to the gnu.emacs.bug news group.

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

(process-status nil) returns an error (please see below) in spite of
it's documentation
claiming that it's argument can indeed be nil.

                 Buffer gasket_tilting.mac has no process

And this works (not ;-)) for all of my buffers.

Many thanks for Emacs 23

   Dieter

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
/appl/emacs/emacs-23.1/etc/DEBUG for instructions.


In GNU Emacs 23.1.1 (x86_64-unknown-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2009-07-30 on sbav102x
Windowing system distributor `The X.Org Foundation', version 11.0.60802000
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: de_DE.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default-enable-multibyte-characters: t

Major mode: Help

Minor modes in effect:
  shell-dirtrack-mode: t
  auto-insert-mode: t
  iswitchb-mode: t
  display-time-mode: t
  show-paren-mode: t
  tooltip-mode: t
  mouse-wheel-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: t
  transient-mark-mode: t
  abbrev-mode: t
  view-mode: t

Recent input:
C-s C-s C-s C-s C-s C-s C-s C-s C-s C-s C-s C-s M-b
M-b C-s C-w C-w C-w C-w C-s C-s C-s C-a C-x r m t o
d o <return> C-n <help-echo> C-M-d C-M-f C-M-d C-M-f
C-M-SPC M-w C-s C-s C-s C-s C-g C-g C-f C-M-SPC M-w
C-s C-y M-e <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
<return> C-s C-s C-s C-s C-s C-s C-s C-s C-s C-s C-s
C-s C-s C-s C-s C-s C-s C-s C-s C-r C-r C-r C-r C-r
C-r C-r C-r C-r C-r C-r C-r C-r C-r C-r C-s C-s C-r
C-r C-s C-s <return> C-n C-n C-n C-n C-n C-n C-n C-n
C-n C-n C-n C-n C-n C-n C-n C-p C-p C-h f <return>
C-h f p r o c e s s <tab> - s t q <tab> <backspace>
<tab> <return> C-x 4 b <return> M-: M-( p r o c e s
s - s t a t u s SPC a n s y s - p r o c e s s <return>
q M-: M-p M-f M-f M-f <M-backspace> M-d n i l <return>
q C-h f M-p <return> M-x v e r s i o n <return> <C-down-mouse-1>
<down-mouse-1> <mouse-1> C-v M-v C-v C-x k <return>
C-x b . m <return> M-v M-v M-v M-v M-v M-v M-v M-v
M-v M-v M-v M-v M-v M-v M-v M-v M-v M-v M-> M-v M-<
C-v C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-d
C-x C-s C-x r b <return> M-} M-} C-c C-u <help-echo>
<help-echo> M-: M-p M-f M-f M-f <M-backspace> M-" g
a s k e t _ b u c k l i n g . m a c <return> <down-mouse-1>
<mouse-movement> <mouse-1> M-x r e p o r t <tab> <
return>

Recent messages:
Back to top level.
Entering debugger...
Back to top level.
Type C-x 4 C-o RET to restore the other window.
GNU Emacs 23.1.1 (x86_64-unknown-linux-gnu, X toolkit, Xaw3d scroll
bars) of 2009-07-30 on sbav102x
string=: Buffer gasket_tilting.mac has no process
Mark set [2 times]
Saving file /disk/disk1/project/gasket_buckling/gasket_buckling.mac...
Wrote /disk/disk1/project/gasket_buckling/gasket_buckling.mac
Copied from beginning of buffer to cursor.
nil


-- 
H. Dieter Wilhelm
Darmstadt Germany

bug#3998: 23.1; process status

[Stefan Monnier]

> (process-status nil) returns an error (please see below) in spite of
> it's documentation claiming that it's argument can indeed be nil.

It says that if the argument is nil, process-status will use the current
buffer's process.  But if the current buffer doesn't have any process,
then of course it'll signal an error.  That's why the error is:

                 Buffer gasket_tilting.mac has no process
rather than
                 nil is not a valid process


-- Stefan