Ah, thanks!

This should really be noted in the ‘Sample Implementation’ section of the specification.

Daphne

> On 8 Jan 2025, at 11:27, Shiro Kawai <xxxxxx@gmail.com> wrote:
>
> The SRFI needs to intercept the evaluation mechanism, so it's not supposed to run as is in the bare REPL.
>
> See https://srfi-email.schemers.org/srfi-226/msg/21181936/
>
>
> On Tue, Jan 7, 2025 at 11:59 PM Daphne Preston-Kendal <xxxxxx@nonceword.org> wrote:
> See the subject line. Alas, I can’t offer much more help than this REPL transcript:
>
> Chez Scheme Version 10.1.0
> Copyright 1984-2024 Cisco Systems, Inc.
>
> > (import (control-features))
> > (define my-tag (make-continuation-prompt-tag 'foo))
> > (continuation-prompt-available? my-tag)
> Exception in dynamic-environment-metacontinuation: #f is not of type #<record type dynamic-environment>
> Type (debug) to enter the debugger.
> > (call-with-continuation-prompt (lambda () (continuation-prompt-available? my-t
> ag)) my-tag)
> Exception in dynamic-environment-marks: #f is not of type #<record type dynamic-environment>
> Type (debug) to enter the debugger.
> > (with-continuation-mark 'magic #t (current-continuation-marks))
> Exception: failed assertion continuation at line 436, char 10 of control-features.sls
> Type (debug) to enter the debugger.
>
>
> Daphne
>