Github user dawidwys commented on a diff in the pull request:
https://github.com/apache/flink/pull/6120#discussion_r201655466
--- Diff:
flink-core/src/main/java/org/apache/flink/api/java/typeutils/TypeExtractor.java
---
@@ -584,21 +581,6 @@ private static void registerFactory(Type t, Class<?
extends TypeInfoFactory> fac
// number of parameters the SAM of implemented
interface has; the parameter indexing applies to this range
final int baseParametersLen =
sam.getParameterTypes().length;
- // executable references "this" implicitly
- if (paramLen <= 0) {
--- End diff --
Why you removed checking the input type information?
---
