I have a code like this

#!/usr/bin/perl
use warnings;
use strict;
use utf8;

binmode( STDERR, ':utf8' );
$ENV{ LANG } = 'C';
warn "<UTF-8 string>";
open( my $in, '<', 'non-existing-file' ) || die $!;
[download]

Because "$!" is just a byte string, output is terrible. My questions are:

1) Are there any way to enfoce '$!' to 'C' locale. "$ENV{ LANG } = 'C';" does,'t works.

2) Are there any good solution? Some my poor workarounds are:

• Don't use 'use utf8'
• on't use "binmode( STDERR, ':utf8' );" and live with "Wide character in warn" messages.
• Decode '$!'. and don't use any modules which uses 'die $!'
• use __DIE__/__WARN__ signal-handlers.

My perl version: v5.14.2

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