reproducible segmentation fault on cygwin

[emacs user]

I find CVS gnu emacs on cygwin to be very unstable.  when I run it
under the debugger there is a complained on segmentation fault,
whatever that is...  here are the instructions for reproducing this
error message:

/usr/local/emacs/src $ gdb emacs
GNU gdb 6.3.50_2004-12-28-cvs (cygwin-special)
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain 
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i686-pc-cygwin"...
DISPLAY = :0.0
TERM = xterm
Breakpoint 1 at 0x20099ea6: file emacs.c, line 454.
Breakpoint 2 at 0x20074d08: file xterm.c, line 7790.
(gdb) run -q --no-site-file
Starting program: /usr/local/emacs/src/emacs.exe -q --no-site-file
---Type <return> to continue, or q <return> to quit---

Program received signal SIGSEGV, Segmentation fault.
0x7c809f62 in KERNEL32!IsBadWritePtr ()
  from /cygdrive/c/WINDOWS/system32/kernel32.dll
(gdb) quit
The program is running.  Exit anyway? (y or n) y


In GNU Emacs 21.3.50.1 (i686-pc-cygwin, GTK+ Version 2.4.14)
of 2005-01-11 on cata2
Distributor `The Cygwin/X Project', version 11.0.60801000
configured using `configure '--with-gtk''

Important settings:
 value of $LC_ALL: nil
 value of $LC_COLLATE: C
 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: nil
 locale-coding-system: nil
 default-enable-multibyte-characters: t

Major mode: Diary

Minor modes in effect:
 delete-selection-mode: t
 auto-compression-mode: t
 auto-image-file-mode: t
 display-time-mode: t
 tool-bar-mode: t
 mouse-wheel-mode: t
 menu-bar-mode: t
 global-font-lock-mode: t
 font-lock-mode: t
 unify-8859-on-encoding-mode: t
 utf-translate-cjk-mode: t
 column-number-mode: t
 line-number-mode: t
 transient-mark-mode: t
 abbrev-mode: t

Recent input:
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <menu-bar> <help-menu> <re
port-emacs-bug>

Recent messages:
Loading mule-util...done
Marking holidays...done
Marking diary entries...done
Preparing diary...done
dbgz-3
Loading vcard...done
Loading vm-vcard...done
Loading /home/eli/.emacs.d/.session...done
For information about the GNU Project and its goals, type C-h C-p.
Loading emacsbug...done

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