The Row Filter and Row Splitter nodes makes it possible to filter on Row Numbers lower than 1. From 0 to somewhere negative. But as far as I know row numbers are always 1 or higher.
It is even in the error messages: Row number must be larger than zero: -42
Thanks for reporting! We are aware of this limitation of the numeric input widget (it’s not set up to support unsigned number input really). Hence, only the “backend” rejects the value. We’ll improve it in a later version.
