Bug when redimensioning multi-dimension arrays?

[DSMan195276]

It seems that QB wants to keep all of the data in the array and just change the indexes that point to the data. Is that true? I'm not sure I understand the reasoning behind that, but I'd love to know.

In a lot of ways it's just laziness, it's the easiest way to implement _preserve because it requires no special copying logic. The data backing an array is always stored as one big one-dimensional array, even for multi-dimensional arrays, and that backing data is simply copied verbatim into the memory for the resized array. When the array is accessed, QB64 does logic like `x * bound1 + y * bound2 + z` to calculation the location of the `x,y,z` index into that backing one-dimensional array. If the size of `bound1` or `bound2` are changed then that throws off all the math for how the `x,y,z` indexes correspond to the backing data, even though the backing data was never changed.

That said, from a technical sense _preserve could maintain the index locations, it's just more complicated to implement.