parens in prelude breaks bicycle-cycle-global #16

Hi,
thank you for bicycling........
putting parens in comments in a prelude makes bicycle-cycle-global to fail.
I checked with emacs -Q (first time ever I use emacs -Q, thanks to Claude I have to confess...)
So :
emacs -Q
M-x package-initialize RET
M-x load-library RET bicycle RET
in a scratch buffer, put
;; (stuff)
;;; blah
some code

and then, M-x bicycle-cycle-global fails with :
Debugger entered--Lisp error: (wrong-type-argument number-or-marker-p nil)
outline-hide-sublevels(nil)
bicycle-cycle-global()
funcall-interactively(bicycle-cycle-global)
#(bicycle-cycle-global record nil)
call-interactively@ido-cr+-record-current-command(# bicycle-cycle-global record nil)
apply(call-interactively@ido-cr+-record-current-command # (bicycle-cycle-global record nil))
call-interactively(bicycle-cycle-global record nil)
command-execute(bicycle-cycle-global record)
execute-extended-command(nil "bicycle-cycle-global" nil)
funcall-interactively(execute-extended-command nil "bicycle-cycle-global" nil)
#(execute-extended-command nil nil)
call-interactively@ido-cr+-record-current-command(# execute-extended-command nil nil)
apply(call-interactively@ido-cr+-record-current-command # (execute-extended-command nil nil))
call-interactively(execute-extended-command nil nil)
command-execute(execute-extended-command)