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    utf8::encode($_) if utf8::is_utf8($_);

Global symbol "$c" requires explicit package name at test.pl line 8.
Execution of test.pl aborted due to compilation errors (#1)
...
    which package the global variable is in (using "::").
    
BEGIN not safe after errors--compilation aborted at /usr/lib64/perl5/5
+.12.2/Carp.pm line 113.

use strict;
use utf8;
...
}

$c;