file-attribute on certain Chinese filenames failed

[MJ Chan]

I had trouble in accessing some files that contains certain Chinese
(big5) characters (in fact, I found only one character so far that is
causing the problem; all others are good). After checking around, I
found that the problem would take place in "lstat" call in the C
source. One example is in "file-attributes" (src/dired.c).

For example, if I created a file named "=26345" (see below for the
"describe-char" on that particular Chinese character) and then
evaluated this, it returned nil. 

(file-attributes "=26345")
nil

As mentioned above, the culprit seems to be in calling lstat with
encoded version of the file name as shown below (taken from dired.c)

  GCPRO1 (filename);
  encoded = ENCODE_FILE (filename);
  UNGCPRO;

  if (lstat (SDATA (encoded), &s) < 0)

    return Qnil;

If I changed the call to use un-encoded filename (i.e. lstat
(filename,...)), then it is good. But I am not sure if this is the
right thing to do. 

BTW, file-name-coding-system is big5 in my setup.

  character: =26345 (156485, #o461505, #x26345, U+6703)
    charset: chinese-big5-1 (Frequently used part (A141-C67F) of Big5 (Chinese 
traditional).)
 code point: #x46 #x45
     syntax: w  which means: word
   category: C:Chinese (Han) characters of 2-byte character sets c:Chinese
             |:While filling, we can break a line at this character.
buffer code: #x98 #xC6 #xC5
  file code: not encodable by coding system undecided-unix
    display: by this font (glyph code)
     -outline-mingliu-normal-r-normal-normal-12-90-96-96-c-*-big5-* (#x6703)

There are text properties here:
  fontified            t


-------------------

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