UTF-8 in strings - a bug?

["Björn Persson" <spam-away@nowhere.nil>]

The reference manual says:

3.5.2(2): The predefined type Character is a character type whose values 
correspond to the 256 code positions of Row 00 (also known as Latin-1) 
of the ISO 10646 Basic Multilingual Plane (BMP).

3.6.3(4): type String is array(Positive range <>) of Character;

It seems clear to me: Strings are Latin-1 (except for programs compiled 
in nonstandard modes). But when I set my Fedora system to use UTF-8, the 
strings I get from Ada.Command_Line.Argument contain UTF-8. This means 
that some of the elements in the string aren't characters, only byte 
values that are parts of multi-byte characters. And of course 'Length 
returns the number of bytes, not the number of characters. This looks 
like a violation of the standard. Should I consider this a bug in the 
library? Or in the compiler (Gnat (GCC) 3.3.2 and 3.4.0)?

-- 
Björn Persson

jor ers @sv ge.
b n_p son eri nu