* commit 'ed24d3f2e991906973afce8aa6a3fa54f4a3e4df': We need to update mPos when we copy a FieldPacker via its data[] member.
* commit 'ed24d3f2e991906973afce8aa6a3fa54f4a3e4df': We need to update mPos when we copy a FieldPacker via its data[] member.