cpu loop in sort-lines

[Rosbach, Hans A.]

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In GNU Emacs 21.1.1 (i386-msvc-nt4.0.1381)
 of 2001-10-22 on OSLP1153
configured using `configure --with-msvc (12.00)'
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: ENU
  locale-coding-system: iso-latin-1
  default-enable-multibyte-characters: nil

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

I have experienced that emacs can sometimes go into a cpu loop for
sort-lines for large files.  If this is a known bug please let me
know.  

I have 2 files of aproximately 90000 lines each, and the following
provokes the error in emacs after starting with -q

C-x d <directory>
<select one file and read it>
C-x d RET
<select the other file and read it>
C-SPC
C-end
M-x sort-lines
<select the other buffer>
C-SPC
C-end
M-x sort-lines
and with Reordering buffer... as the message, a cpu loop occurs.

At this point there is no response to e.g. C-g

This does not happen if the sort of the first is done ahead of reading
in the second file.


The version is buildt by myself using VC6 on NT4.
I have also attempted to use the newest I found on alpha.gnu.org
(21.1.50) and it has the same behaviour.




Recent input:
M-x r e p - e m <tab> <return>

Recent messages:
Loading ~/.emacs-tempo...done
Loading find-file...done
Loading paren...done
Loading ~/.emacs-21-common...done
Loading dnvs-taskmgr...done
Loading dnvs-pltools (compiled; note, source file is newer)...done
Loading status-list (source)...done
For information about the GNU Project and its goals, type C-h C-p.
Server subprocess exited
Loading emacsbug...done


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