Github user adoron commented on the issue:
https://github.com/apache/spark/pull/23043
@kiszk is there a use case where the preliminary RDD isn't created with
UnsafeRows? If not then the data will already be corrected on reading.
Anyway, looking at all different implementations of InternalRow.setDouble I
found the following places that aren't handled:
```
OnHeapColumnVector.putDouble
MutableDouble.update
GenericInternalRow.update
SpecificInternalRow.setDouble
```
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