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  1. or download this
    print scalar(foo), ', ', $_, $/ for foo;
  2. or download this
    Use of uninitialized value in print at cl line 16.
Flintstone,
  3. or download this
    print scalar(foo), ', ', $_, $/ for my @a = foo;
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    Flintstone, Fred
Flintstone, Wilma
Flintstone, Pebbles
  5. or download this
    my @foo = qw /one two three/;
sub foo () : lvalue {@foo}
...
print for foo;
__END__
Use of uninitialized value in print at /tmp/bug line 9