Github user paulk-asert commented on the pull request: https://github.com/apache/groovy/commit/1bcaaeaf60078dd5a9aca5cbf1df8f45de68db60#commitcomment-28386425 If you get a chance to check the "Serializable incompatible(!)" warnings from the checkBinaryCompatibility task that would be great. I know some of them are false positives - I did round-trip serialize/unserialize checks for ObservableMap, ObservableList etc. between 2.4 and 2.5 to confirm they are okay but they still show in the list. Otherwise you are usually fine if you generate the serialVersionUID from the 2.4 codebase and then propogate.
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