Release 2.5.0 related fixes

[jwagenleitner]

Some recent commits seem to cause problems with the Nextflow 2.5.0 snapshot builds on the CI server. One can lead to a NPE (commit 90486ae) because fieldNode can be reassigned null after the instanceof check. Another change (commit 57cfd2a) seems to have caused an issue with assigning parameterized types.

[daniellansun]

The PR looks great for me. Out of curiosity, why does the helper method cause the issue(GenericsUtils.extractPlaceholders(GenericsUtils.findParameterizedType(declaringClassForDistance, actualReceiverForDistance)); )? I will set aside some time to investigate.

[jwagenleitner]

It was extracting the actual type argument of String rather than the type Trie.

[paulk-asert]

+1, you actually fixed something on my TODO list to look at today! :-)

[daniellansun]

@paulk-asert it's better to add your tests too

[daniellansun]

@jwagenleitner Gotcha 😉