I think I ran into this issue in a different place.
Guile does not support the ((library (foo bar) ...) form in cond-expand,
so one way around it is to have (cond-expand (srfi-N ... ) ((library
(srfi N)) ...) but in a situation where srfi-N is false Guile tries to
evaluate the (library ... form and errors with (in the case of N being 180):
In procedure symbol->string: Wrong type argument in position 1
(expecting symbol): 180
Here is the example code:
(import (scheme base)
(scheme write))
(cond-expand
(srfi-180
(display "I has SRFI 180 :)")
(newline))
((library (srfi 180))
(display "I has SRFI 180 :)")
(newline))
(else
(display "I do not has SRFI 180 :(")
(newline)))
It also errors without the number there, saying (switching 180 -> foo):
no code for module (srfi foo)
