bug#6187: 23.1; can't save: "Wrong type argument: number-of-marker-p, nil"

[Ryo Furue]

Hi,

I'm writing this without understanding what is wrong, so I apologize
if this is off the point.

| > ;>>>> BEGIN BACK TRACE >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
| > Debugger entered--Lisp error: (wrong-type-argument number-or-marker-p nil)
| >   min(nil)
| >   apply(min nil)
| >   select-safe-coding-system-interactively(1 1362 (utf-8
| >     adobe-standard-encoding next mac-roman gb18030 utf-7 utf-16
| >     utf-16be-with-signature utf-16le-with-signature utf-16be utf-16le
| >     x-ctext iso-2022-7bit utf-8-auto utf-8-with-signature emacs-mule
| >     raw-text iso-2022-8bit-ss2 utf-7-imap utf-8-emacs no-conversion
| >     compound-text-with-extensions ctext-no-compositions
| >     iso-2022-7bit-lock iso-2022-7bit-ss2) (japanese-iso-8bit-unix) nil
| >     utf-8)
| 
| This is pretty strange.  The code in question is
| 
|   (when (and unsafe (not (stringp from)))
|     (pop-to-buffer bufname)
|     (goto-char (apply 'min (mapcar #'(lambda (x) (car (cadr x)))
|                                    unsafe))))
| 
| If `unsafe' is an empty list, it should not have passed the `and'
| conditional.

Right after I got the error, I did "M-x describe-variable unsafe"
and obtained:

  unsafe's value is 
  ((japanese-iso-8bit-unix))


  Documentation:
  Not documented as a variable.

Is this of some interest?

Regards,
Ryo