I've just published draft #5 of SRFI 164.  It was
submitted by Per Bothner, author of the SRFI.

  <https://srfi.schemers.org/srfi-164/>

Per has asked me to announce "last call" for this
SRFI.  He believes that it is ready for
finalization, but would like to give reviewers one
last chance to submit corrections and feedback
before we finalize it.

In particular, I appeal to anyone reading this to
try the sample implementation, run the tests, and
send feedback about your results.

If you're interested in this SRFI, please give
your feedback via the SRFI 164 mailing list before
2019/7/28.  After that, assuming that no major
revisions are required, we will declare it final.

Here's the diff:

  <https://github.com/scheme-requests-for-implementation/srfi-164/compare/d7508dd231e2eb75d12d5553ec618fbe8ec6a04e..7225f3f407cce2bafd833a0553c64a1b79b7e98f>

Regards,

SRFI Editor