perl -e 'print "\x{01C1}\n";'
Wide character in print at -e line 1.
Ç

perl -e 'warn "\x{01C1}\n";'
Ç

perl -e 'die "\x{01C1}\n";'
Ç

perl -e 'print STDERR "\x{01C1}\n";'
Wide character in print at -e line 1.
Ç