id summary reporter owner description type status priority milestone component version resolution keywords cc difficulty 1697 R7RS cond-expand library form is broken zaifir "The `r7rs` egg's support for the `(library ...)` form in `cond-expand` is broken. Running the following example {{{ (import (r7rs)) (define spiffy-installed? (cond-expand ((library (spiffy)) #t) (else #f))) }}} gives this error: {{{ Error: during expansion of (cond-expand ...) - unbound variable: ##sys#core-library-modules }}}" defect closed major someday unknown 5.2.0 fixed