I've just published draft #2 of SRFI 143.  It was submitted
by John Cowan, author of the SRFI.

<http://srfi.schemers.org/srfi-143/>

Here's the diff:

<https://github.com/scheme-requests-for-implementation/srfi-143/commit/7c504e4b99859d440b7acc46bbb885b18e1a003b>

Regards,

SRFI Editor