[bug] useFlattenRecords throws "Maximum call stack size exceeded error"

[vlats05]

I have a virtual table and a record with 50k children rows.
"useFlatterRecords" throws "Maximum call stack size exceeded error" while flattening so large number of records.

Same problem described on stackoverflow:
https://stackoverflow.com/questions/61740599/rangeerror-maximum-call-stack-size-exceeded-with-array-push

How to fix:
Concat two arrays instead of pushing all elements.