Access violation (probably in insert-file-contents)

[John K. Hohm]

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In GNU Emacs 21.2.1 (i386-msvc-nt5.1.2600)
 of 2002-03-19 on buffy
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: t

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

Running the i386 binary release of GNU Emacs 21.2.1 on Windows XP SP1
with this command:

c:\emacs\bin\emacs -q crashme.txt

or simply calling find-file interactively (via C-x C-f) on the file
crashme.txt causes an access violation at 0x01084be3 reading
0x00000020.  WinDbg seems to think that address is
'temacs!coding_restore_composition+6e'.  I tried the elisp debugger,
and the last function it shows is insert-file-contents.  Calling
find-file-literally on the file does not cause a crash.

I have attached the gzip'd crashme.txt file.

crashme.txt.gz
Description: application/gzip-compressed