From 6a42ac74ce686441d27271d3d3a3ce72e6681b13 Mon Sep 17 00:00:00 2001
From: Andy Wingo <wingo@pobox.com>
Date: Sun, 24 May 2015 16:51:01 +0200
Subject: [PATCH] intset-next starting point is optional

* module/language/cps/intset.scm (intset-remove): Remove incorrect comment.
  (intset-next): "i" is optional.
---
 module/language/cps/intset.scm | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/module/language/cps/intset.scm b/module/language/cps/intset.scm
index 3d207975e..382a4ba6d 100644
--- a/module/language/cps/intset.scm
+++ b/module/language/cps/intset.scm
@@ -327,7 +327,6 @@
      (cond
       ((not root) bs)
       ((and (<= min i) (< i (+ min (ash 1 shift))))
-       ;; Add element to set; level will not change.
        (let ((old-root root)
              (root (remove (- i min) shift root)))
          (if (eq? root old-root)
@@ -353,7 +352,7 @@
      (assert-readable! edit)
      (ref min shift root))))
 
-(define (intset-next bs i)
+(define* (intset-next bs #:optional i)
   (define (visit-leaf node i)
     (let lp ((idx (logand i *leaf-mask*)))
       (if (logbit? idx node)