bug#13906: 24.3; Display problems in Python shell

[Konrad Hinsen]

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Please write in English if possible, as the Emacs maintainers
usually do not have translators for other languages.

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':

I have been using Python mode with the Python shell configured for
IPython (as explained in the comments in python.el) for a while with
Emacs 24.2.92 and now with 24.3rc2. It has worked perfectly fine in
24.2.92, but in 24.3rc2 I get frequent display problems which
unfortunately I have not yet been able to make reproducible. The
trouble always starts with the display of a Python
traceback. Somewhere in the middle of the traceback, terminal escape
characters (used by IPython for coloring) are shown instead of being
executed. Here is an example (a screen capture is attached):

/Users/hinsen/Programs/MMTK/main_python_path/MMTK/Trajectory.pyc in 
__getattr__(self, name)
    254             var = self.trajectory.file.variables[name]
    255         except KeyError:
--> 256             raise AttributeError("no variable named " + name)
    257         if 'atom_number' in var.dimensions:
    258             return 
TrajectoryVariable(self.universe,
 self, name)

AttributeError: no variable named file
> /Users/hinsen/Programs/MMTK/main_python_path/MMTK/Trajectory.py(256)__getattr__()
    255         except 
KeyError:
--> 256             raise 
AttributeError("no variable named " + 
name)
    257         if 'atom_number' 
in 
var.dimensions:

ipdb>

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
/Users/hinsen/Applications/Emacs_24.3.app/Contents/Resources/etc/DEBUG.


In GNU Emacs 24.3.1 (x86_64-apple-darwin11.4.2, NS apple-appkit-1138.51)
 of 2013-03-08 on Konrad-Hinsens-MacBook-Pro.local
Windowing system distributor `Apple', version 10.3.1138
Configured using:
 `configure '--with-ns''

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

Major mode: Inferior Python

Minor modes in effect:
  compilation-shell-minor-mode: t
  global-auto-revert-mode: t
  recentf-mode: t
  show-paren-mode: t
  shell-dirtrack-mode: t
  diff-auto-refine-mode: t
  global-undo-tree-mode: t
  undo-tree-mode: t
  yas-global-mode: t
  yas-minor-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
t e r s SPC a r e SPC s h o w n SPC i n s t e a d SPC 
o f SPC b e i n g SPC e x e c u t e d C-a M-f M-f SPC 
( u s e d SPC b y SPC I P y t h o n SPC f p r SPC <backspace> 
<backspace> <backspace> o r SPC c o l o r i n g ) M-q 
<down> . SPC H e r e SPC i s SPC a n SPC e x a m p 
l : <backspace> e : <return> <return> M-` <up> <up> 
<up> <up> <up> <up> <up> <up> <up> <up> C-a C-SPC <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <up> <right> 
<down> <right> <right> <right> M-w M-` C-y <up> <up> 
<up> <up> <up> <up> <up> <up> <up> <up> <up> <up> <up> 
<up> <up> <up> <up> <up> <up> <up> <up> <up> M-` <switch-frame> 
M-` M-` <down-mouse-1> <mouse-movement> <mouse-1> <up> 
<up> C-e <up> C-e <backspace> SPC ( a l s o SPC s h 
o w <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
s c r e e n SPC c a p t u r e SPC a <backspace> M-b 
M-b a SPC C-e i s SPC a t t a c h e d ) : <right> <down> 
<down> <down> <down> <down> C-x 1 <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<ns-drag-file> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> M-` M-x r e p o r t - e m <tab> b <tab> <re
turn>

Recent messages:
Checking 1 files in 
/Users/hinsen/Applications/Emacs_24.3.app/Contents/Resources/leim...
Checking for load-path shadows...done
byte-code: Beginning of buffer
Auto-saving...done
Auto-saving...done
Auto-saving...done
Auto-saving...done
Mark set
byte-code: End of buffer
Mark set

Load-path shadows:
~/.emacs.d/lisp/org-vm hides 
/Users/hinsen/Applications/Emacs_24.3.app/Contents/Resources/lisp/org/org-vm
~/.emacs.d/lisp/org-eshell hides 
/Users/hinsen/Applications/Emacs_24.3.app/Contents/Resources/lisp/org/org-eshell
/Users/hinsen/.emacs.d/elpa/magit-20130216.838/.dir-locals hides 
/Users/hinsen/Applications/Emacs_24.3.app/Contents/Resources/lisp/gnus/.dir-locals

Features:
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vm-toolbar vm-virtual vm-summary-faces vm-mouse vm-page vm compile
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em-script em-prompt em-ls em-hist em-pred em-glob em-dirs em-cmpl
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esh-cmd esh-opt esh-ext esh-proc esh-arg eldoc help-fns esh-groups
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magithub-autoloads finder-inf magit-autoloads markdown-mode-autoloads
marmalade-autoloads furl-autoloads monky-autoloads
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clojure-mode-autoloads oauth2-autoloads paredit-autoloads
parenface-plus-autoloads popup-autoloads pymacs-autoloads
python-mode-autoloads python-pep8-autoloads python-pylint-autoloads
pyvirtualenv-autoloads virtualenv-autoloads yasnippet-autoloads
package cl-macs gv timezone whitespace cl cl-lib filesets easymenu
time-date tooltip ediff-hook vc-hooks lisp-float-type mwheel ns-win
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 ns multi-tty emacs)