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  1. or download this
    {
    package FOO;
    use Data::Dumper;
...
Name "main::Dumper" used only once: possible typo at - line 7.
$VAR1 = \'bar';
print() on unopened filehandle Dumper at - line 7.
  2. or download this
    {
    package FOO;
    use Data::Dumper;
...
__END__
$VAR1 = \'bar';
$VAR1 = \'baz';