Fix `test_types_line_up` when column type missing
Fix `test_types_line_up` when column type missing

a column type `xml` is missing in regexp pattarn. However,
`assert_equal 1, lengths.uniq.length` is success when `lengths` are all
`nil` because a column type is missing. a test will be failed by using
`compact` when a column type is missing.

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