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
