GNU bug report logs - #21646
25.0.50; python-nav-end-of-statement sometimes gets stuck

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: immerrr again <immerrr <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 25.0.50; python-nav-end-of-statement sometimes gets stuck
Date: Thu, 8 Oct 2015 15:03:14 +0300

I have recently re-populated configuring my .emacs.d removing all the
cruft that had accumulated over several years and after that reset I
started encountering weird issues with python-mode.  Sometimes (quite
rare, couple times a day, when I try to open a file the window freezes
and stops responding even to ESC ESC ESC).

When I gdb into the process, I see the code looping indefinitely in
python-nav-end-of-statement hopping around a triple-quote string on a
statement that looked like this (with "|" being point):

my_var = ""|"
   .. some
   .. string
   .. here
"""
my_other_var = """
   .. some
   .. string
   .. here
"""


Here's the full backtrace:

"python-nav-end-of-statement" (0x906566b8)
"python-info-end-of-statement-p" (0x90656830)
"python-info-end-of-block-p" (0x906569c8)
"python-nav--forward-sexp" (0x90656b88)
"python-nav-forward-sexp" (0x90656d48)
"python-nav-backward-sexp" (0x90656f00)
"python-info-docstring-p" (0x90657088)
"python-font-lock-syntactic-face-function" (0x90657200)
"font-lock-fontify-syntactically-region" (0x90657400)
"font-lock-default-fontify-region" (0x906575f0)
"font-lock-fontify-region" (0x906577e8)
0x3bb9920 PVEC_COMPILED
"run-hook-wrapped" (0x90657af0)
"jit-lock--run-functions" (0x90657cf0)
"jit-lock-fontify-now" (0x90657f08)
"jit-lock-function" (0x90658108)
"window-end" (0x90659718)
"linum-update-window" (0x90659918)
"mapc" (0x90659a60)
"linum-update" (0x90659c60)
0x3012080 PVEC_COMPILED
"walk-windows" (0x9065a030)
"linum-after-config" (0x9065a220)
"set-window-buffer" (0x9065a3e0)
"switch-to-buffer" (0x9065a5e8)
"find-file" (0x9065a770)
"find-file-at-point" (0x9065a9a8)
"helm-find-file-or-marked" (0x9065ab50)
"helm-execute-selection-action-1" (0x9065ace0)
"helm-execute-selection-action" (0x9065aec0)
"helm-internal" (0x9065b068)
"apply" (0x9065b210)
"helm" (0x9065b3b8)
"apply" (0x9065b560)
"helm" (0x9065b730)
"helm-find-files-1" (0x9065b948)
"helm-find-files" (0x9065bbc0)
"funcall-interactively" (0x9065bbb8)
"call-interactively" (0x9065be10)
"command-execute" (0x9065bfa8)

In python-nav-end-of-statement it seems to be stuck in
(python-syntax-context 'string) branch, as sometimes I would see
re-search-forward in the backtrace, too.  Unfortunately, this issue does
not manifest itself reliably and I don't have much time to spare
debugging this issue further.

Any ideas on what to do next?


In GNU Emacs 25.0.50.4 (x86_64-unknown-linux-gnu, GTK+ Version 3.4.2)
 of 2015-10-06
Repository revision: 3248a9b6b2dff2e3c8fa41afc159efa3d594aff0
Windowing system distributor 'The X.Org Foundation', version 11.0.11103000
System Description:    Ubuntu 12.04.5 LTS

Configured using:
 'configure --prefix=/home/immerrr/.local'

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GCONF GSETTINGS
NOTIFY LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11

Important settings:
  value of $LC_TIME: en_GB.UTF-8
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Python

Minor modes in effect:
  diff-auto-refine-mode: t
  jedi-mode: t
  guide-key-mode: t
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  show-paren-mode: t
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  font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  size-indication-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent messages:

Checker definition probably flawed.
Mark set [2 times]
Buffer apiexamples.py modified; kill anyway? (y or n) y
<C-mouse-1> is undefined
Mark set
Mark saved where search started [2 times]
Ag finished
user-error: No window up from selected window
Mark saved where search started

Load-path shadows:
/home/immerrr/.emacs.d/elpa/helm-20150921.1209/helm-multi-match hides
/home/immerrr/.emacs.d/elpa/helm-core-20150921.1209/helm-multi-match

Features:
(shadow sort mail-extr align tabify two-column iso-transl face-remap
emacsbug message rfc822 mml mml-sec mailabbrev gmm-utils mailheader
sendmail descr-text cc-mode cc-fonts cc-guess cc-menus cc-cmds cc-styles
cc-align cc-engine cc-vars cc-defs ag vc-svn find-dired pulse gud vc
vc-dispatcher vc-git diff-mode ido seq misearch multi-isearch
company-elisp jka-compr eieio-opt speedbar sb-image ezimage dframe
network-stream nsm starttls warnings company-jedi jedi-core epc ctable
concurrent guide-key s ucs-normalize popwin disp-table whitespace
flycheck find-func subr-x python image-file winner traad
request-deferred request url-http tls url-auth url-gw mail-utils popup
python-environment deferred company-files company-oddmuse
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dynamic-setting system-font-setting font-render-setting move-toolbar gtk
x-toolkit x multi-tty make-network-process emacs)

Memory information:
((conses 16 527033 59339)
 (symbols 48 55696 0)
 (miscs 40 2434 1240)
 (strings 32 108846 8675)
 (string-bytes 1 3332812)
 (vectors 16 74239)
 (vector-slots 8 1837822 121059)
 (floats 8 963 1171)
 (intervals 56 10860 382)
 (buffers 976 36)
 (heap 1024 59761 5376))

Message #8 received at 21646 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: immerrr again <immerrr <at> gmail.com>
Cc: 21646 <at> debbugs.gnu.org
Subject: Re: bug#21646: 25.0.50;
 python-nav-end-of-statement sometimes gets stuck
Date: Thu, 08 Oct 2015 17:35:16 +0300

> Date: Thu, 8 Oct 2015 15:03:14 +0300
> From: immerrr again <immerrr <at> gmail.com>
> 
> I have recently re-populated configuring my .emacs.d removing all the
> cruft that had accumulated over several years and after that reset I
> started encountering weird issues with python-mode.  Sometimes (quite
> rare, couple times a day, when I try to open a file the window freezes
> and stops responding even to ESC ESC ESC).
> 
> When I gdb into the process, I see the code looping indefinitely in
> python-nav-end-of-statement hopping around a triple-quote string on a
> statement that looked like this (with "|" being point):

I think this is the same bug as 21629.

Message #11 received at 21646 <at> debbugs.gnu.org (full text, mbox):

From: immerrr again <immerrr <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 21646 <at> debbugs.gnu.org
Subject: Re: bug#21646: 25.0.50;
 python-nav-end-of-statement sometimes gets stuck
Date: Thu, 8 Oct 2015 17:41:03 +0300

Looks so indeed.

On Thu, Oct 8, 2015 at 5:35 PM, Eli Zaretskii <eliz <at> gnu.org> wrote:
>> Date: Thu, 8 Oct 2015 15:03:14 +0300
>> From: immerrr again <immerrr <at> gmail.com>
>>
>> I have recently re-populated configuring my .emacs.d removing all the
>> cruft that had accumulated over several years and after that reset I
>> started encountering weird issues with python-mode.  Sometimes (quite
>> rare, couple times a day, when I try to open a file the window freezes
>> and stops responding even to ESC ESC ESC).
>>
>> When I gdb into the process, I see the code looping indefinitely in
>> python-nav-end-of-statement hopping around a triple-quote string on a
>> statement that looked like this (with "|" being point):
>
> I think this is the same bug as 21629.

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