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* First pass refactor
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* Initial work toward restoring UB support in te.Sequential
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Debug UB conversion function from NVTEShape to std::vector
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* Reapply "Allow NVTEShape to own data." (#1703)

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Fixes #1692
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Revert "Allow NVTEShape to own data. (#1674)"

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* Allow NVTEShape to own data.
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Repeated calls to nvte_shape should not invalidate
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It would be possible to avoid unnecessary comparisons
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