# vertices() works

    Can't recycle `name` (size 2) to match `foo` (size 3).

# vertices() errors on duplicate attribute names

    Duplicate attribute name in `vertices()`: "name".

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    Duplicate attribute name in `vertices()`: "blop".

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    Duplicate attribute name in `vertices()`: "name".

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    Duplicate attribute names in `vertices()`: "foo" and "bar".

