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bug#332: accept-process-output hangs (incompatibility)

From: Ulrich Neumerkel
Subject: bug#332: accept-process-output hangs (incompatibility)
Date: Wed, 28 May 2008 13:33:01 +0200

--text follows this line--

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 address@hidden 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:

Note: I reported that bug yesterday for an intermediary pre 22.2
version.  The same problem occurs in 22.2 and is incompatible with
previous versions:

C-x C-e the following two expressions

  (setq my-process
        (start-process "mine" "mine" "sleep" "1h"))

(accept-process-output my-process nil 400)

We create a process mine, that sleeps for an hour.
accept-process-output will hang, whereas it should return after 400
milliseconds.  However, if argument SECONDS is replaced by 0 it will
eval as expected.

In GNU Emacs 22.2.1 (i686-pc-linux-gnu, X toolkit)
 of 2008-05-28 on gupu.complang.tuwien.ac.at
Windowing system distributor `The XFree86 Project, Inc', version 11.0.4003
configured using `configure  '--without-toolkit-scroll-bars' '--prefix' 
'/opt/gupu' '--with-git=no''

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
  locale-coding-system: iso-8859-1
  default-enable-multibyte-characters: t

Major mode: Emacs-Lisp

Minor modes in effect:
  tooltip-mode: t
  tool-bar-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
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  auto-compression-mode: t
  line-number-mode: t

Recent input:
<help-echo> <help-echo> <help-echo> <down-mouse-1> 
<mouse-1> M-x C-g C-x C-f ~ / l f t <tab> e m <tab> 
a <tab> <tab> <tab> / <tab> <tab> e <tab> <return> 
<down> <down> C-x C-g <down> C-k <down> <down> <down> 
<down> <down> <down> <down> <down> <down> C-y C-a <up> 
<up> <up> <up> <up> <up> <up> <up> C-SPC <up> <up> 
<up> C-w C-k C-k C-k C-k C-x C-s <down> <down> <down> 
<down> C-x C-e C-w <down> C-x C-g C-/ <down> C-x C-e 
C-g <help-echo> <help-echo> <help-echo> <help-echo> 
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo> 
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo> 
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo> 
<menu-bar> <help-menu> <send-emacs-bug-report>

Recent messages:
Loading help-mode...done
Making completion list... [2 times]
Mark set [2 times]
Wrote /home/ulrich/lftp/emacs/e19.el
Quit [2 times]
Loading emacsbug...
Loading regexp-opt...done
Loading emacsbug...done

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