Method: io.protostuff.runtime.RuntimeSchema#mergeFrom, if Desers didn't have the field, it will call input.handleUnknownField(n, this);
Instead of call field.mergeFrom(input, message);
Inner this function, it will call: io.protostuff.GraphByteArrayInput#mergeObject
it will call references.add(value);
The bug is if Desers didn't have some fields, the references will miss something and its sequence is no the same with Sers, so the later WIRETYPE_REFERENCE field will have a wrong ref.
This bug may causes JVM crash, or data corruption.