Should empty exist file use local encoding system?

[FKtPp]

On Sun, Nov 04, 2007 at 11:13:20AM +0900, Stephen J. Turnbull wrote:
> FKtPp writes:
> 
>  > IMO it should use a user defined encoding system or inherent the
>  > current environment locale encoding system to do that.
> 
> Maybe in general, but definitely not in a mail program.  For example,
> in Japan the standard mail encodings are ISO-2022-JP and UTF-8, but
> most OSes (except Linux) have the locale ja_JP.eucJP or (implicitly)
> ja_JP.shift_jis.  The mail program should be dealing with this
> explicitly.  Fix your mail program.
> 

Err... Sorry, that is not the point I want to express. I do can do some
tricky to work around this issue, but, I think the strange behavir is inidcating
a exsit bug. to reproduce:

1. open a XEmacs session
2. C-x C-f non-exist.file

=> buffer `non-exist.file' is using your locale encoding.

3. type something(even a single `a' is okey) into `no-exist.file' and C-x C-s, C-x C-k <RET>
4. C-x C-f non-exist.file

=> buffer `non-exist.file' is using your locale encoding.

5. delete all the `non-exist.file' content and C-x C-s, C-x C-k <RET>
6. C-x C-f non-exist.file (it is now a kind of empty-exist-file now).

=> buffer `non-exist.file' is using `undecide' encoding system(modeline indicator `AUTO')

I think it use same encoding system as open a new-nonexist-file or nonempty-exist-file.