bug#7361: 23.2; python-describe-symbol fails

[Andrey Paramonov]

Hello!

python-describe-symbol fails for me, i.e. on the following minimal
example (| shows cursor pos):

import os.path
os.path.abspath|

Instead of description of abspath, C-c C-f shows a backtrace:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/share/emacs/23.2/etc/emacs2.py", line 202, in ehelp
    except: help (name)
  File "/usr/lib/python2.6/site.py", line 432, in __call__
    return pydoc.help(*args, **kwds)
  File "/usr/lib/python2.6/pydoc.py", line 1730, in __call__
    self.help(request)
  File "/usr/lib/python2.6/pydoc.py", line 1775, in help
    elif request: doc(request, 'Help on %s:')
  File "/usr/lib/python2.6/pydoc.py", line 1515, in doc
    pager(render_doc(thing, title, forceload))
  File "/usr/lib/python2.6/pydoc.py", line 1321, in pager
    pager = getpager()
  File "/usr/lib/python2.6/pydoc.py", line 1328, in getpager
    if not sys.stdin.isatty() or not sys.stdout.isatty():
ValueError: I/O operation on closed file

Not reproducible with emacs -Q, but I don't see how my customizations
could interfere:

(custom-set-variables
  ;; custom-set-variables was added by Custom.
  ;; If you edit it by hand, you could mess it up, so be careful.
  ;; Your init file should contain only one such instance.
  ;; If there is more than one, they won't work right.
 '(TeX-PDF-mode t)
 '(TeX-save-query nil)
 '(case-fold-search t)
 '(column-number-mode t)
 '(csv-align-style (quote right))
 '(current-language-environment "UTF-8")
 '(default-input-method "russian-computer")
 '(dictionary-create-buttons nil)
 '(dictionary-default-dictionary "ru-en--en-ru")
 '(dictionary-server "dict.dvo.ru")
 '(dired-listing-switches "-l --group-directories-first")
 '(ediff-split-window-function (quote split-window-horizontally))
 '(ediff-window-setup-function (quote ediff-setup-windows-plain))
 '(global-visual-line-mode t)
 '(gnus-select-method (quote (nntp "news.gmane.org")))
 '(ibuffer-enable t)
 '(ibuffer-never-show-predicates (quote ("^\\*.*")) nil (ibuf-ext))
 '(kill-whole-line t)
 '(list-directory-brief-switches "-CF --group-directories-first")
 '(list-directory-verbose-switches "-l --group-directories-first")
 '(mouse-wheel-mode t)
 '(org-insert-mode-line-in-empty-file t)
 '(org-support-shift-select (quote always))
 '(pc-selection-mode t)
 '(pp^L-^L-string-function (lambda (window) (make-string (1- (window-width 
window)) 32)))
 '(pp^L-^L-string-pre "")
 '(pretty-control-l-mode t)
 '(reftex-plug-into-AUCTeX t)
 '(ropemacs-enable-autoimport t)
 '(scroll-conservatively 50)
 '(scroll-margin 5)
 '(scroll-preserve-screen-position t)
 '(sentence-end-double-space nil)
 '(show-paren-mode t)
 '(svn-status-default-export-directory "~/study")
 '(svn-status-fancy-file-state-in-modeline nil)
 '(svn-status-preserve-window-configuration t)
 '(text-mode-hook (quote (turn-on-auto-fill text-mode-hook-identify)))
 '(tool-bar-mode nil)
 '(truncate-lines t)
 '(use-dialog-box nil)
 '(w3m-coding-system (quote utf-8))
 '(w3m-default-coding-system (quote utf-8))
 '(w3m-file-coding-system (quote utf-8))
 '(w3m-file-name-coding-system (quote utf-8))
 '(w3m-terminal-coding-system (quote utf-8))
 '(w3m-use-cookies t)
 '(x-select-enable-clipboard t)
 '(x-select-request-type (quote UTF8_STRING) t))
(custom-set-faces
  ;; custom-set-faces was added by Custom.
  ;; If you edit it by hand, you could mess it up, so be careful.
  ;; Your init file should contain only one such instance.
  ;; If there is more than one, they won't work right.
 '(pp^L-highlight ((t (:inherit shadow :strike-through t))))
 '(tooltip ((((class color)) (:inherit variable-pitch :background "lightyellow" 
:foreground "black" :height 0.83333)))))


;; --- AucTeX ---
(add-hook 'LaTeX-mode-hook 'turn-on-reftex)
(eval-after-load "tex"
  '(setcdr (assoc "^pdf$" TeX-output-view-style)
           '("." "evince %o")))


;; --- Key bindings ---
(global-set-key [f15] 'toggle-input-method)
(global-set-key [(control tab)] 'next-buffer)
(global-set-key [(control shift iso-lefttab)] 'previous-buffer)
(global-set-key [(control f4)] 'kill-this-buffer)

(global-set-key [(f5)] 'delete-other-windows)
;(global-set-key [(f6)] 'other-window)

(global-set-key [(f9)] 'ibuffer)
;(global-set-key [(f10)] 'menu-bar-open)
(global-set-key [(f11)] 'svn-status)

(global-set-key [(f12)] '(lambda() (interactive) (find-file 
remember-data-file)))
(global-set-key [(control f12)] 'remember)

(global-set-key [(control \`)] 'dictionary-search)
(global-set-key [(meta \?)] 'find-name-dired)

I'm ready to provide any additional info,
Andrey Paramonov

In GNU Emacs 23.2.1 (i486-pc-linux-gnu, GTK+ Version 2.20.0)
 of 2010-08-15 on raven, modified by Debian
Windowing system distributor `The X.Org Foundation', version 11.0.10707000
configured using `configure  '--build' 'i486-linux-gnu' '--build' 
'i486-linux-gnu' '--prefix=/usr' '--sharedstatedir=/var/lib' 
'--libexecdir=/usr/lib' '--localstatedir=/var/lib' '--infodir=/usr/share/info' 
'--mandir=/usr/share/man' '--with-pop=yes' 
'--enable-locallisppath=/etc/emacs23:/etc/emacs:/usr/local/share/emacs/23.2/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/23.2/site-lisp:/usr/share/emacs/site-lisp:/usr/share/emacs/23.2/leim'
 '--with-x=yes' '--with-x-toolkit=gtk' '--with-toolkit-scroll-bars' 
'build_alias=i486-linux-gnu' 'CFLAGS=-DDEBIAN -g -O2' 'LDFLAGS=-g' 'CPPFLAGS=''

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: ru_RU.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: Python

Minor modes in effect:
  global-semanticdb-minor-mode: t
  semantic-idle-scheduler-mode: t
  semantic-mode: t
  delete-selection-mode: t
  show-paren-mode: t
  pc-selection-mode: t
  shell-dirtrack-mode: t
  pretty-control-l-mode: t
  tooltip-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-encryption-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  global-visual-line-mode: t
  visual-line-mode: t
  transient-mark-mode: t

Load-path shadows:
/usr/share/emacs/23.2/site-lisp/auctex/tex-style hides 
/usr/share/emacs/site-lisp/auctex/tex-style
/usr/share/emacs/23.2/site-lisp/auctex/tex-font hides 
/usr/share/emacs/site-lisp/auctex/tex-font
/usr/share/emacs/23.2/site-lisp/auctex/bib-cite hides 
/usr/share/emacs/site-lisp/auctex/bib-cite
/usr/share/emacs/23.2/site-lisp/auctex/tex-buf hides 
/usr/share/emacs/site-lisp/auctex/tex-buf
/usr/share/emacs/23.2/site-lisp/auctex/context-nl hides 
/usr/share/emacs/site-lisp/auctex/context-nl
/usr/share/emacs/23.2/site-lisp/auctex/tex-info hides 
/usr/share/emacs/site-lisp/auctex/tex-info
/usr/share/emacs/23.2/site-lisp/auctex/tex hides 
/usr/share/emacs/site-lisp/auctex/tex
/usr/share/emacs/23.2/site-lisp/auctex/font-latex hides 
/usr/share/emacs/site-lisp/auctex/font-latex
/usr/share/emacs/23.2/site-lisp/auctex/context hides 
/usr/share/emacs/site-lisp/auctex/context
/usr/share/emacs/23.2/site-lisp/auctex/tex-fptex hides 
/usr/share/emacs/site-lisp/auctex/tex-fptex
/usr/share/emacs/23.2/site-lisp/auctex/context-en hides 
/usr/share/emacs/site-lisp/auctex/context-en
/usr/share/emacs/23.2/site-lisp/auctex/latex hides 
/usr/share/emacs/site-lisp/auctex/latex
/usr/share/emacs/23.2/site-lisp/auctex/tex-fold hides 
/usr/share/emacs/site-lisp/auctex/tex-fold
/usr/share/emacs/23.2/site-lisp/auctex/tex-jp hides 
/usr/share/emacs/site-lisp/auctex/tex-jp
/usr/share/emacs/23.2/site-lisp/auctex/multi-prompt hides 
/usr/share/emacs/site-lisp/auctex/multi-prompt
/usr/share/emacs/23.2/site-lisp/auctex/texmathp hides 
/usr/share/emacs/site-lisp/auctex/texmathp
/usr/share/emacs/23.2/site-lisp/auctex/tex-bar hides 
/usr/share/emacs/site-lisp/auctex/tex-bar
/usr/share/emacs/23.2/site-lisp/auctex/tex-mik hides 
/usr/share/emacs/site-lisp/auctex/tex-mik
/usr/share/emacs/23.2/site-lisp/auctex/toolbar-x hides 
/usr/share/emacs/site-lisp/auctex/toolbar-x
/usr/share/emacs/23.2/site-lisp/debian-startup hides 
/usr/share/emacs/site-lisp/debian-startup
/usr/share/emacs23/site-lisp/flim/md4 hides /usr/share/emacs/23.2/lisp/md4
/usr/share/emacs23/site-lisp/flim/hex-util hides 
/usr/share/emacs/23.2/lisp/hex-util
/usr/share/emacs23/site-lisp/flim/sha1 hides /usr/share/emacs/23.2/lisp/sha1
/usr/share/emacs23/site-lisp/dictionaries-common/flyspell hides 
/usr/share/emacs/23.2/lisp/textmodes/flyspell
/usr/share/emacs23/site-lisp/dictionaries-common/ispell hides 
/usr/share/emacs/23.2/lisp/textmodes/ispell
/usr/share/emacs23/site-lisp/flim/ntlm hides /usr/share/emacs/23.2/lisp/net/ntlm
/usr/share/emacs23/site-lisp/flim/sasl-cram hides 
/usr/share/emacs/23.2/lisp/net/sasl-cram
/usr/share/emacs23/site-lisp/flim/sasl hides /usr/share/emacs/23.2/lisp/net/sasl
/usr/share/emacs23/site-lisp/flim/sasl-ntlm hides 
/usr/share/emacs/23.2/lisp/net/sasl-ntlm
/usr/share/emacs23/site-lisp/flim/sasl-digest hides 
/usr/share/emacs/23.2/lisp/net/sasl-digest
/usr/share/emacs23/site-lisp/flim/hmac-md5 hides 
/usr/share/emacs/23.2/lisp/net/hmac-md5
/usr/share/emacs23/site-lisp/flim/hmac-def hides 
/usr/share/emacs/23.2/lisp/net/hmac-def

Features:
(shadow sort mail-extr message sendmail ecomplete rfc822 mml mml-sec
password-cache mm-decode mm-bodies mm-encode mailcap mail-parse rfc2231
rfc2047 rfc2045 qp ietf-drums mailabbrev gmm-utils mailheader canlock
sha1 sha1-el hex-util hashcash emacsbug semantic/edit semantic/tag-file
semantic/find semantic/senator semantic/analyze/complete
semantic/analyze semantic/sort semantic/scope semantic/analyze/fcn
noutline outline goto-addr info semantic/tag-write thai-util thai-word
mule-util lao-util etags help-fns pp imenu cus-edit semantic/db-file
cedet-files semantic/wisent/python semantic/decorate/include
semantic/db-find semantic/db-ref semantic/decorate/mode
semantic/decorate pulse semantic/dep semantic/wisent/python-wy
semantic/wisent semantic/wisent/wisent semantic/db-mode semantic/db
eieio-base semantic/idle semantic/format ezimage semantic/tag-ls
semantic/ctxt semantic/util-modes semantic/util semantic semantic/tag
semantic/lex semantic/fw eieio byte-opt bytecomp byte-compile mode-local
cedet quail multi-isearch dired vc-dispatcher vc-svn python-21 python
help-mode view server ibuf-ext ibuffer delsel disp-table paren pc-select
gnus gnus-ems nnheader gnus-util netrc time-date mail-utils mm-util
mail-prsvr wid-edit cus-start cus-load pp-c-l debian-el
debian-el-loaddefs w3m-load compile ess-toolbar ess-mouse mouseme
thingatpt browse-url ess-menu ess-swv ess-noweb noweb-font-lock-mode
ess-bugs-l essd-els ess-sas-d ess-sas-l ess-sas-a executable shell
ess-arc-d ess-vst-d ess-xls-d ess-lsp-l ess-sta-d ess-sta-l cc-vars
cc-defs make-regexp ess-sp6-d ess-sp5-d ess-sp3-d ess-r-d ess-r-args
assoc ess-s-l ess-inf ess-utils comint ring ess-mode noweb-mode ess
ess-custom regexp-opt easymenu ess-compat ess-site emacs-goodies-el
emacs-goodies-custom emacs-goodies-loaddefs easy-mmode preview-latex
tex-site auto-loads cyril-util tooltip ediff-hook vc-hooks
lisp-float-type mwheel x-win x-dnd font-setting tool-bar dnd fontset
image fringe lisp-mode register page menu-bar rfn-eshadow timer select
scroll-bar mldrag 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 loaddefs button minibuffer faces cus-face files
text-properties overlay md5 base64 format env code-pages mule custom
widget hashtable-print-readable backquote make-network-process dbusbind
system-font-setting font-render-setting gtk x-toolkit x multi-tty emacs)