SIGSEGV in parse_str_as_multibyte in MINGW compiled emacs

[stephen_powell]

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Please write in English if possible, because the Emacs maintainers
usually do not have translators to read other languages for them.

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

I'm using the latest from CVS.

I select a zipped file in dired mode and try to view one of the files
it contains. Emacs then segfaults. This is repeatable. The backtrace
follows:

Program received signal SIGSEGV, Segmentation fault.
parse_str_as_multibyte (str=0x17b0a00 "", len=9865842, nchars=0x82f054,
    nbytes=0x82f058) at charset.c:1491
1491          if (UNIBYTE_STR_AS_MULTIBYTE_P (str, endp - str, n))
(gdb) bt
#0  parse_str_as_multibyte (str=0x17b0a00 "", len=9865842, nchars=0x82f054,
    nbytes=0x82f058) at charset.c:1491
#1  0x0103a589 in make_string (contents=0x17b0a00 "", nbytes=9865842)
    at alloc.c:2334
#2  0x010836f3 in x_consider_frame_title (frame=25644036) at xdisp.c:8380
#3  0x0105da88 in prepare_menu_bars () at xdisp.c:8424
#4  0x0105f8bb in redisplay_internal (preserve_echo_area=0) at xdisp.c:10141
#5  0x01081412 in redisplay () at xdisp.c:9747
#6  0x0100b2ab in read_char (commandflag=1, nmaps=7, maps=0x82fb2c,
    prev_event=24625153, used_mouse_menu=0x82fba8) at keyboard.c:2539
#7  0x01019135 in read_key_sequence (keybuf=0x82fcd0, bufsize=30,
    prompt=24625153, dont_downcase_last=0, can_return_switch_frame=1,
    fix_current_buffer=1) at keyboard.c:8818
#8  0x01005ba5 in command_loop_1 () at keyboard.c:1527
#9  0x010a23b1 in internal_condition_case (bfun=0x1005910 <command_loop_1>,
    handlers=24709721, hfun=0x1005660 <cmd_error>) at eval.c:1389
#10 0x0101e2af in command_loop_2 () at keyboard.c:1318
#11 0x010a1f6a in internal_catch (tag=24698841,
    func=0x101e280 <command_loop_2>, arg=24625153) at eval.c:1148
#12 0x0101db52 in recursive_edit_1 () at keyboard.c:1297
#13 0x0101ddc7 in Frecursive_edit () at keyboard.c:1051
#14 0x01001c16 in main (argc=3, argv=0xa26018) at emacs.c:1775


In GNU Emacs 22.0.50.1 (i386-mingw-nt5.1.2600)
 of 2005-06-01 on D3LD581S
Distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (3.3) --cflags  -O3 -march=pentium4 
-mfpmath=sse -DENABLE_CHECKING -mno-cygwin'

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: ENA
  locale-coding-system: cp1252
  default-enable-multibyte-characters: t

Major mode: Dired by date

Minor modes in effect:
  auto-image-file-mode: t
  auto-insert-mode: t
  cua-mode: t
  display-time-mode: t
  whitespace-global-mode: t
  show-paren-mode: t
  encoded-kbd-mode: t
  mouse-wheel-mode: t
  auto-compression-mode: t
  menu-bar-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  unify-8859-on-decoding-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  size-indication-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t
  next-error-follow-minor-mode:  Fol

Recent input:
<down> <down> <down> <down> <down> <down> <down> <down> 
<help-echo> M-< C-s b a s <prior> <prior> <prior> <next> 
<next> <up> <up> <up> <up> <up> <up> <up> <up> <up> 
<up> <up> <up> <up> <up> <up> <up> <up> <next> C-x 
k C-x b s c r <return> <S-insert> <return> <S-insert> 
<up> C-SPC C-a <C-insert> <down> <up> <help-echo> C-x 
r l <down> <down> <down> <down> <down> <down> <down> 
<return> <down> <down> <down> <down> <down> <down> 
C-s s m a <return> <return> C-n C-n <help-echo> M-x 
d e <tab> <backspace> <backspace> r e p <tab> C-g C-g 
<help-echo> <help-echo> <help-echo> <help-echo> <menu-bar> 
<help-menu> <report-emacs-bug>

Recent messages:
Killed inactive buffer: cygwin.
Killed inactive buffer: emacs.
Mark set
Killed inactive buffer: sources.redhat.com.
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-- 
"I prefer rogues to imbeciles, because they sometimes take a rest."
-- Alexandre Dumas (fils)