$ perl -CSDAL -e 'print "the utf8 flag is ", utf8::is_utf8(shift) ? "on" : "off", " for command-line arguments\n"' hi...the utf8 flag is on for command-line arguments

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$ perl        -e 'print "the utf8 flag is ", utf8::is_utf8(shift) ? "on" : "off", " for command-line arguments\n"' hi...
the utf8 flag is off for command-line arguments