Exception that is thrown when an attept is made to perform a side-effectful operation on an {@link RDFList} that is the empty list, or rdf:nil.This is not permissible, since it would cause the URI of the RDFList to change from rdf:nil to a new bNode, and in Jena the URI of a node is invariant. To avoid this operation, when extending an empty list use operations that return the updated list (such as {@link RDFList#cons}, or {@link RDFList#with}, or check first to see if the list {@linkplain RDFList#isEmpty is empty}, and replace it with a non-null list.