I'm missing something trivial, but how can I try the reference implementation on REPL? I get this (I'm in srfi-226 directory):
$ chezscheme --libdirs lib Chez Scheme Version 9.5 Copyright 1984-2017 Cisco Systems, Inc. > (import (except (rnrs (6)) display) (control-features)) > (call-with-continuation-prompt (lambda () (display 'foo))) Exception in dynamic-environment-marks: #f is not of type #<record type dynamic-environment> Type (debug) to enter the debugger. I can run scripts, e.g. chezscheme --libdirs lib ./tests.sqs --shiro