collection works cannot be serialized in redis

ArrayList@SubList is not serializable, collection works should own their own list implementation and not reference the one provided by the caller.

015-10-21 10:17:38,649 ERROR [http-bio-0.0.0.0-8080-exec-14] [org.nuxeo.ecm.core.redis.contribs.RedisBlockingQueue] Failed to add Work: DuplicateCollectionMemberWork(, Progress(?%, ?/0), null)
java.io.NotSerializableException: java.util.ArrayList$SubList
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1184)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
at org.nuxeo.ecm.core.redis.contribs.RedisWorkQueuing.serializeWork(RedisWorkQueuing.java:438)
....