bug#12743: 24.2.50; run-python hangs

[Left Right <olegsivokon@gmail.com>]

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Please describe exactly what actions triggered the bug, and
the precise symptoms of the bug.  If you can, give a recipe
starting from `emacs -Q':

Immediately after starting Emacs with `emacs -Q` I ran
M-x run-python
This enters an infinite loop. I can interrupt the infinite loop with
C-g. After loop was interrupted, I looked into *Messages* buffer.
This is its contents:

Sent python-shell-completion-setup-code
Sent python-ffap-setup-code
Sent python-eldoc-setup-code
Error during redisplay: (jit-lock-function 1) signaled (quit)

After the fucntion was interrupted, the *Python* buffer appeared.
The modeline in the buffer spells: (Inferior Python:run
Shell-Compile)
I'm not sure if that is how it should be. I experience similar issues
with JavaScript-2 mode when using commint buffer to M-x run-js
Some times Emacs would lock up and after interruping it with C-g it
would print a message connected to a problem with displaying a face.
Sorry, I can't provide more info at the moment, but if that is
related, will find a way to do it.

Best.

Oleg

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'.
For information about debugging Emacs, please read the file
/usr/local/share/emacs/24.2.50/etc/DEBUG.


In GNU Emacs 24.2.50.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.24.11)
 of 2012-10-14 on wvxvw-desktop
Bzr revision: 110539 rgm@gnu.org-20121014001707-nd6ld4b0oxhsyl2c
Windowing system distributor `Fedora Project', version 11.0.11203000
System Description:	Fedora release 17 (Beefy Miracle)

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: Fundamental

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:
M-x r u n - p y t h <tab> <return> C-x o C-x b <return>
M-x r e p o r t - b <tab> <return>

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Sent python-shell-completion-setup-code
Sent python-ffap-setup-code
Sent python-eldoc-setup-code
Error during redisplay: (jit-lock-function 1) signaled (quit)

Load-path shadows:
None found.

Features:
(shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml
mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev
gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util
mail-prsvr mail-utils compile python rx easymenu comint ring ansi-color
time-date tooltip ediff-hook vc-hooks lisp-float-type mwheel x-win x-dnd
tool-bar dnd fontset image regexp-opt fringe tabulated-list newcomment
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 macroexp files text-properties
overlay sha1 md5 base64 format env code-pages mule custom widget
hashtable-print-readable backquote make-network-process dbusbind
dynamic-setting system-font-setting font-render-setting move-toolbar gtk
x-toolkit x multi-tty emacs)