() Thien-Thi Nguyen <ttn@gnuvola.org>
() Fri, 27 Jan 2012 11:27:30 +0100

   The code assumes Guile 2 DTRT [...]

Well, further investigation raises new doubts.  The issue really
is in contiguous mixed raw and \x-escaped octets, and not just
single byte external representation, so here is a followup
experiment that addresses that directly: