I have a test script that is "doing the right thing", but is generating a warning. 

use strict;
use warnings;
use utf8;

my $str = "采样速率太高";
my $output2;

open OUTVAR2, '>', \$output2;
print OUTVAR2 $str;
close OUTVAR2;

print "\n$output2";
print "\n$str";

[download]

Prints:

采样速率太高
Wide character in print at noname2.pl line 9.

采样速率太高
Wide character in print at noname2.pl line 13.

Changing the open to use '>:utf8' fixes the line 9 warning, but leaves the line 13 warning. Adding binmode STDOUT, 'utf8'; fixes the line 13 warning, but now the output becomes:

é‡‡æ ·é€ŸçŽ‡å¤ªé«˜
采样速率太高

How do I clean up the warnings and retain the correct output?

DWIM is Perl's answer to Gödel

In reply to utf8 encoding and warnings woe by GrandFather

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