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bug#7016: Bug in Speedbar

From: Prashant Sachdeva
Subject: bug#7016: Bug in Speedbar
Date: Wed, 15 Sep 2010 13:48:29 +0530

The easiest way to reproduce the bug is as follows:
1. Load emacs with "emacs -Q"
2. Open the file with the above code.
3. semantic-mode
4. global-linum-mode
5. Open speedbar
6. Go to 'quick buffers' display in speedbar
7. Press space on the .cpp file opened and then press space twice on
the Variables section.

I'm trying to narrow down the problem further, but to no success yet.
But surely, it has something to do with global-linum-mode, semantic
and speedbar.

Here is the system config.

In GNU Emacs 23.2.1 (i486-pc-linux-gnu, GTK+ Version 2.20.1)
 of 2010-09-02 on rutherfordium, modified by Debian
Windowing system distributor `The X.Org Foundation', version 11.0.10706000
configured using `configure  '--build=i486-linux-gnu'
'--host=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'
'--with-x=yes' '--with-x-toolkit=gtk' '--with-toolkit-scroll-bars'
'build_alias=i486-linux-gnu' 'host_alias=i486-linux-gnu'

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_IN
  value of $XMODIFIERS: nil
  locale-coding-system: iso-latin-1-unix
  default enable-multibyte-characters: t

Major mode: C++/l

Minor modes in effect:
  global-semanticdb-minor-mode: t
  semantic-idle-scheduler-mode: t
  semantic-mode: t
  global-linum-mode: t
  linum-mode: t
  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-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t
  abbrev-mode: t


Could you please give me instructions on how exactly to run in gdb and
to get the trace. I'll do it as soon as possible.


On 15 September 2010 05:05, Glenn Morris <address@hidden> wrote:
> Prashant Sachdeva wrote:
>> 1. Edit in C++ mode.
>> 2. Open speedbar.
>> 3. When the cursor is on the "Variables" section, press space to open
>> the menu and then space to close. Emacs crashes with a segmentation
>> fault.
>> I might add I am using semantic in C++ mode and sr-speedbar is also being 
>> used.
> Please describe *exactly* what you did, starting from `emacs -Q'.
> I have no "Variables" section in my speedbar, and I do not know what
> sr-speedbar is.
> Please also include the information from M-x report-emacs-bug about
> your system and Emacs.
> If you can run Emacs under gdb, try to get a backtrace from the crash.

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