ByteString.Char8 damages Unicode

[Voker57]

import Data.Bytestring.Char8
unpack (pack "тест") == "тест"
-- False, should be True 
Data.ByteString.Char8.length $ pack "тест"
-- 4, should be 8 (UTF-8). Library truncates more-than-8bit chars

I'm not sure if this library should assume UTF-8 for {en,de}coding, but imho something has to be done about it.

[dons]

This is the expected behaviour, and documented. Bytestrings when packing will truncate the input to 8 bits. If you require a specific encoding, pre-process the string first with e.g. utf8-string or else use the unicode bytestring package: Data.Text.