I mean , this is terminal problem , doesn't it ?

No. It looks similar but no. The problem, in a nutshell, if you use warn "$ARGV $_ " for PerlIO::get_layers(*ARGV) you can see ARGV doesn't get utf8 io layer, only STDIN gets them 

$ perl ...       utf8wobom.csv  >bad
utf8wobom.csv unix  at ...
utf8wobom.csv crlf  at ...

$ perl ... <      utf8wobom.csv  >good
- unix  at ...
- crlf  at ...
- encoding(utf-8-strict)  at  ...
- utf8  at  ...

[download]

In my non-utf terminal it shows 

$ ls -loanh good bad
-rw-rw-rw-  1 0 115 2011-10-02 01:31 bad
-rw-rw-rw-  1 0 103 2011-10-02 01:31 good

$ diff good bad
2c2
< "ΓÖá","ΓÖÑ","ΓÖª","ΓÖú"
---
> "♠","♥","♦","♣"

In reply to Re^4: Why Doesn't Text::CSV_XS Print Valid UTF-8 Text When Used With the open Pragma? ("XS") by Anonymous Monk
in thread Why Doesn't Text::CSV_XS Print Valid UTF-8 Text When Used With the open Pragma? by Jim

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