Runtime error when using a List in a case class

[erwan]

I'm trying to use List in my model, however when I do that I have runtime exception during my tests. It seems like I end up with a broken model, with a List that throws whatever I do with it. I'm getting a java.util.NoSuchElementException: head of empty list exception from inside the Scala standard lib, so it's neither empty nor containing valid values.

I created a repro as a new test in this branch: erwan@2d339dc

Is there anything I should do differently here? Or maybe that would be a bug in the library?

(migrated from findify/flink-adt#71 as the same issue is present in this new lib)

[novakov-alexey]

Hi @erwan,

Thanks for the test!

Can you try to use this:

import org.apache.flink.api._

instead of this

import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment
import org.apache.flink.streaming.api.datastream.DataStream

?

[erwan]

That worked, thank you!

[novakov-alexey]

Ok, great. I think we need pull Migration section in the readme file to the top. It shows these imports to be used.