Rather than signaling an unspecified error when set-port-position! is given a position object that is uninterpretable, or a byte offset that is outside the valid range, SRFI 192 now says that an error satisfying i/o-invalid-position-error? is signaled.
John Cowan http://vrici.lojban.org/~cowanxxxxxx@ccil.org Higglédy-pigglèdy / XML programmers Try to escape those / I-eighteen-N woes; Incontrovertibly / What we need more of is Unicode weenies and / François Yergeaus.