bug#23279: display mucks up

[Rob Dunne]

This bug report will be sent to the Bug-GNU-Emacs mailing list
and the GNU bug tracker at debbugs.gnu.org.  Please check that
the From: line contains a valid email address.  After a delay of up
to one day, you should receive an acknowledgment at that address.

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':

emacs -Q
load a file
--------------------------------------------------------------------------------
\documentclass[11pt]{article}

#type C-k on this line, twice

\begin{document}
\end{document}
stuff
--------------------------------------------------------------------------------

type C-k on the line indicated, twice. The file now looks like
--------------------------------------------------------------------------------
\documentclass[11pt]{article}


stuff
stuff
stuff
--------------------------------------------------------------------------------
Dam. It is now happening in this buffer as well. Highlighting the
display restores the text


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/share/emacs/24.3/etc/DEBUG.


In GNU Emacs 24.3.1 (x86_64-pc-linux-gnu, GTK+ Version 3.10.7)
 of 2014-03-08 on lamiak, modified by Debian
Windowing system distributor `The X.Org Foundation', version 11.0.11501000
System Description:    Ubuntu 14.04.4 LTS

Configured using:
 `configure '--build' 'x86_64-linux-gnu' '--build' 'x86_64-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/emacs24:/etc/emacs:/usr/local/share/emacs/24.3/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/24.3/site-lisp:/usr/share/emacs/site-lisp'
 '--with-crt-dir=/usr/lib/x86_64-linux-gnu' '--with-x=yes'
 '--with-x-toolkit=gtk3' '--with-toolkit-scroll-bars'
 'build_alias=x86_64-linux-gnu' 'CFLAGS=-g -O2 -fstack-protector
 --param=ssp-buffer-size=4 -Wformat -Werror=format-security -Wall'
 'LDFLAGS=-Wl,-Bsymbolic-functions -Wl,-z,relro'
 'CPPFLAGS=-D_FORTIFY_SOURCE=2''

Important settings:
  value of $LANG: en_AU
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: iso-latin-1-unix
  default enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  shell-dirtrack-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-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
<help-echo> <help-echo> <help-echo> C-x C-f <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> b u <tab> <return> <down> <down>
C-k <down-mouse-1> <mouse-movement> <mouse-movement>
<drag-mouse-1> <down-mouse-1> <mouse-1> C-x k <return>
y e s <return> <down> C-x C-f <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
<backspace> b u <tab> <return> <down> <return> <return>
<return> <up> # <backspace> % t y p e SPC C = k SPC
<backspace> <backspace> <backspace> - k SPC o n SPC
t h i s SPC l i n e <up> <down> C-a C-k C-k C-x u <down-mouse-1>
<mouse-movement> <mouse-movement> <drag-mouse-1> <down-mouse-1>
<mouse-1> <down-mouse-1> <mouse-1> <down-mouse-1> <mouse-1>
C-x u C-x u C-x u <help-echo> <down-mouse-1> <mouse-movement>
<mouse-movement> <drag-mouse-1> <down-mouse-1> <mouse-1>
<down-mouse-1> <mouse-1> <down-mouse-1> <mouse-1> <down-mouse-1>
<mouse-1> SPC SPC - - SPC t w i c e C-a C-k C-k <help-echo>
<help-echo> <help-echo> <down-mouse-1> <mouse-movement>
<mouse-movement> <drag-mouse-1> <down-mouse-1> <mouse-1>
<down-mouse-1> <mouse-1> C-k C-k <up> <up> <up> <up>
<up> <down-mouse-1> <mouse-movement> <mouse-movement>
<drag-mouse-1> <delete> <return> <return> <down-mouse-1>
<mouse-1> # t y p e SPC c _ l <backspace> <backspace>
<backspace> <help-echo> <down-mouse-1> <mouse-movement>
<mouse-movement> <drag-mouse-1> <down-mouse-1> <mouse-1>
<down-mouse-1> <mouse-1> C - k SPC o n SPC t h i s
SPC l i n e SPC <backspace> , SPC t w i c e <down-mouse-1>
<mouse-1> C-x C-s <up> <up> <up> <up> <up> C-k C-k
<down-mouse-1> <mouse-movement> <mouse-movement> <drag-mouse-1>
<down-mouse-1> <mouse-1> <down-mouse-1> <mouse-1> C-x
k <return> y e s <return> <escape> x r e <tab> p <tab>
o <tab> r <tab> <return>

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
byte-code: End of buffer
Undo!
Redo!
Undo! [2 times]
Auto-saving...done
Saving file /home/dun280/bug.tex...
Wrote /home/dun280/bug.tex
Making completion list... [3 times]

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None found.

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