John Cowan, author of SRFI 172, Two
Safer Subsets of R7RS, 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.

  <https://srfi.schemers.org/srfi-172>

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
172 mailing list before 2019/9/10.
After that, assuming that no major
revisions are required, we will declare
it final.

Regards,

SRFI Editor