88a7860251
Don't call `MEM_dupallocN` on unknown data. We don't know that this pointer references a heap allocation, especially not an allocation made by Blender's allocator. Even if that's the case currently, we don't want to rely on that in the future as attribute data management gets more flexible with implicit sharing. Using `Array` is a simpler way to copy memory, though it does require a bunch of boilerplate changes in the rest of the modifier.
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