[
https://issues.apache.org/jira/browse/FLINK-2104?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Till Rohrmann closed FLINK-2104.
--------------------------------
Resolution: Fixed
Fixed via 3e860e7fd5ef9c4aba10f738ce95b12d40654cce
> Fallback implicit values for PredictOperation and TransformOperation don't
> work if Nothing is inferred as the output type
> -------------------------------------------------------------------------------------------------------------------------
>
> Key: FLINK-2104
> URL: https://issues.apache.org/jira/browse/FLINK-2104
> Project: Flink
> Issue Type: Bug
> Components: Machine Learning Library
> Reporter: Till Rohrmann
> Assignee: Till Rohrmann
> Labels: ML
> Fix For: 0.9
>
>
> If one calls a {{Predictor}} or {{Transformer}} with a wrong input type, then
> the Scala compiler tries to apply the fallback implicit value for this
> operation type. However, since the return type of the operations is
> parameterized, it will infer it to be {{Nothing}}. The problem is then that
> the implicit value {{Operation[Self, Input, Nothing]}} cannot be unified with
> the implicit parameter {{Operation[Self, Input, Output]}}. This seems to be a
> known Scala issue [https://issues.scala-lang.org/browse/SI-1570].
> I propose to fix the output type of the implicit values to {{Any}} which will
> avoid that {{Nothing}} is inferred. This should solve the problem.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
