[Python-Dev] PEP 383: Non-decodable Bytes in System Character Interfaces

[Hrvoje Niksic]

Lino Mastrodomenico wrote:
> Since this byte sequence [b'\xed\xb3\xbf'] doesn't represent a valid character when
> decoded with UTF-8, it should simply be considered an invalid UTF-8
> sequence of three bytes and decoded to '\udced\udcb3\udcbf' (*not*
> '\udcff').

"Should be considered" or "will be considered"?  Python 3.0's UTF-8 
decoder happily accepts it and returns u'\udcff':

 >>> b'\xed\xb3\xbf'.decode('utf-8')
'\udcff'

If the PEP depends on this being changed, it should be mentioned in the PEP.