I've just published draft #4 of SRFI 144.  It was submitted
by John Cowan, the author of the SRFI.

<https://srfi.schemers.org/srfi-144/>

Here's the diff:

<https://github.com/scheme-requests-for-implementation/srfi-144/compare/b8ffa84cba3a2a00ecb7deb203eb4a57a2746cae...8ca93687d6daccd3123e7c539d610855990494ea>

Regards,

SRFI Editor