I've just published draft #6 of SRFI 146.  It was submitted
by Marc Nieper-Wißkirchen, author of the SRFI.

<https://srfi.schemers.org/srfi-146/>

Here are Marc's comments on the draft:

  I have made a pull request for SRFI 146.  The changes are
  based on John Cowan's latest comments.  He may want to
  review them when the new draft is announced.  Afterwards,
  SRFI 146 should be ready to finalize.

Here's the diff:

<https://github.com/scheme-requests-for-implementation/srfi-146/compare/8c4153b029cb8296f3ca1d537a921088610eec02...45db459afe402cf1c4cc84bad00ebb3750493380>

Regards,

SRFI Editor