Crash upon selecting article in Gnus in 21.5-b27.

Fatal error.

Your files have been auto-saved.
Use `M-x recover-session' to recover them.

Your version of XEmacs was distributed with a PROBLEMS file that may describe
your crash, and with luck a workaround.  Please check it first, but do report
the crash anyway.

Please report this bug by invoking M-x report-emacs-bug, or by selecting
`Send Bug Report' from the Help menu.  If that won't work, send ordinary
email to `xemacs-beta@xemacs.org'.  *MAKE SURE* to include this entire
output from this crash, especially including the Lisp backtrace, as well as
the XEmacs configuration from M-x describe-installation (or equivalently,
the file `Installation' in the top of the build tree).

If you are fortunate enough to have some sort of debugging aid installed
on your system, for example Visual C++, and you can get a C stack backtrace,
*please* include it, as it will make our life far easier.


Lisp backtrace follows:

  # (unwind-protect ...)
  # (unwind-protect ...)
  # (unwind-protect ...)
  # (unwind-protect ...)
  # (unwind-protect ...)
  # (unwind-protect ...)
  # (unwind-protect ...)
  # (unwind-protect ...)
  # bind (next-child first-vchild first-hchild dedicatedp modeline-hscroll hscro
ll pixel-bottom pixel-right pixel-top pixel-left point-marker start-marker mark-
marker buffer minibuffer-scrollp minibufferp currentp --rest--41193)
  make-saved-window(:currentp t :minibufferp nil :minibuffer-scrollp nil :buffer
 #<buffer " *nntpd*"> :pixel-left 0 :pixel-top 0 :pixel-right 662 :pixel-bottom
144:hscroll 0 :modeline-hscroll 0 :dedicatedp nil :first-hchild nil :first-vchi
ld nil :next-child [cl-struct-saved-window nil nil nil #<buffer " *nntpd*"> #<ma
rker in no buffer 0xa3e06a8> #<marker at 1 in  *nntpd* 0xa3e06d8> #<marker at 1
in  *nntpd* 0xa3e06c0> 0 144 662 604 0 0 nil nil nil nil])
  # bind (left top right bottom buffer edges window)
  root-window->saved-window(#<window on " *nntpd*" 0x1f6852>)
  # bind (left top right bottom buffer edges window)
  root-window->saved-window(#<window 0x1225bc>)
  # bind (frame frame)
  current-window-configuration()
  # bind (config)
  push-window-configuration()
  # bind (buf norecord bufname)
  ad-Orig-switch-to-buffer(#<buffer "*Summary nnml:xemacs-beta*"> nil)
  # bind (ad-return-value args)
  switch-to-buffer(#<buffer "*Summary nnml:xemacs-beta*">)
  # bind (buf buffer sub size comp-subs rest new-win result s window-min-height
window-min-width total len subs type current-window window split)
  gnus-configure-frame((summary 9 point) #<window on " *nntpd*" 0x1f6852>)
  # bind (sub size comp-subs rest new-win result s window-min-height window-min-
width total len subs type current-window window split)
  gnus-configure-frame((cond (gnus-use-trees (quote (vertical 1.0 (summary 0.25
point) (tree 0.25) (article 1.0)))) (t (quote (vertical 1.0 (summary 0.25 point)
 (if gnus-carpal (quote (summary-carpal 4))) (article 1.0))))))
  # bind (gnus-window-frame-focus split all-visible force setting)
  gnus-configure-windows(article)
  # (unwind-protect ...)
  # (unwind-protect ...)
  # bind (result group gnus-tmp-internal-hook summary-buffer gnus-article)
  # (unwind-protect ...)
  # bind (header all-headers article)
  gnus-article-prepare(46099 nil)
  # bind (all-header article)
  gnus-summary-display-article(46099)
  # bind (push backward subject unread)
  gnus-summary-next-article(t nil t)
  # bind (subject unread)
  gnus-summary-prev-article(t nil)
  #<compiled-function nil "...(73)" [gnus-newsgroup-data gnus-auto-select-same g
nus-summary-goto-unread headers to gnus-summary-prev-article never gnus-summary-
first-article-p get-text-property gnus-intangible gnus-summary-goto-subject gnus
-number gnus-summary-last-subject 3 vectorp 1] 7 ("c:\\progra~1\\xemacs\\xemacs-
packages\\lisp\\gnus\\gnus-sum.elc" . 203670) nil>()
  call-interactively(gnus-summary-prev-unread-article)
  # (condition-case ... . error)
  # (catch top-level ...)

----
lispdesc_indirect_count_1(long 17747061, const memory_description * 0x00000000, const void * 0x011f1a50 glyph_block_dynarr_description_1) line 364
kkcc_marking(int 17755141) line 1148 + 19 bytes
gc_incremental() line 1975 + 421 bytes
Ffuncall(int 17115070, long * 0x00000012) line 3826
execute_optimized_program(const unsigned char * 0x0082eda8, int 82, long * 0x0263c440) line 862 + 11 bytes
Ffuncall(int 17115070, long * 0x0000001c) line 3932 + 791 bytes
execute_optimized_program(const unsigned char * 0x0082eea0, int 75, long * 0x0264c008) line 862 + 11 bytes
Ffuncall(int 17115070, long * 0xff7d0fd0) line 3932 + 791 bytes
execute_optimized_program(const unsigned char * 0x0082efc8, int 68, long * 0x0264c008) line 862 + 11 bytes
Ffuncall(int 17115070, long * 0xff7d0ec0) line 3932 + 791 bytes
execute_optimized_program(const unsigned char * 0x0082f0f0, int 66, long * 0x02483b00) line 862 + 11 bytes
Ffuncall(int 17115070, long * 0x00000000) line 3932 + 791 bytes
execute_optimized_program(const unsigned char * 0x0082f1f4, int 65, long * 0x0265d798) line 862 + 11 bytes
Ffuncall(int 17115070, long * 0x00000000) line 3932 + 791 bytes
execute_optimized_program(const unsigned char * 0x0082f2a8, int 63, long * 0x0262e8a4) line 862 + 11 bytes
Ffuncall(int 17115070, long * 0xff7d0c9c) line 3932 + 791 bytes
execute_optimized_program(const unsigned char * 0x0082f364, int 60, long * 0x0bdbda6c) line 862 + 11 bytes
Ffuncall(int 17115070, long * 0x00000001) line 3932 + 791 bytes
execute_optimized_program(const unsigned char * 0x0082f418, int 43, long * 0x05391d08) line 862 + 11 bytes
Ffuncall(int 17115070, long * 0xff7d0b28) line 3932 + 791 bytes
execute_optimized_program(const unsigned char * 0x0082f4d8, int 27, long * 0x05391d08) line 862 + 11 bytes
Ffuncall(int 17115070, long * 0x00000001) line 3932 + 791 bytes
execute_optimized_program(const unsigned char * 0x0082f598, int 22, long * 0x05380f10) line 862 + 11 bytes
Ffuncall(int 17115070, long * 0x00000001) line 3932 + 791 bytes
execute_optimized_program(const unsigned char * 0x0082f650, int 12, long * 0x0599d8c8) line 862 + 11 bytes
Ffuncall(int 17377294, long * 0x0bdc5b30) line 3932 + 791 bytes
unbind_to_hairy(int 2) line 6113 + 6 bytes
execute_optimized_program(const unsigned char * 0x05661db0, int 37699544, long * 0x0586e7b0) line 682 + 74 bytes
0586e810()