X-Git-Url: https://git.distorted.org.uk/~mdw/sod/blobdiff_plain/ed3ce6c2352d76442b79badfbe08bc6ecde6934d..9a3cb4610ab59001fd44c13dcdc6ea206acf0e50:/src/utilities.lisp

diff --git a/src/utilities.lisp b/src/utilities.lisp
index a496283..1670f55 100644
--- a/src/utilities.lisp
+++ b/src/utilities.lisp
@@ -717,18 +717,18 @@
 			      (setf (gethash k seen) item)))))
 		sequence)))
 	((listp sequence)
-	 (mapl (lambda (tail)
-		 (let* ((item (car tail))
-			(rest (cdr tail))
-			(match (member (funcall key item) rest
-				       :test test :key key)))
-		   (when match (funcall report item (car match)))))
-	       sequence))
+	 (do ((tail sequence (cdr tail))
+	      (i 0 (1+ i)))
+	     ((endp tail))
+	     (let* ((item (car tail))
+		    (match (find (funcall key item) sequence
+				 :test test :key key :end i)))
+	       (when match (funcall report item match)))))
 	((vectorp sequence)
 	 (dotimes (i (length sequence))
 	   (let* ((item (aref sequence i))
 		  (pos (position (funcall key item) sequence
-				 :key key :test test :start (1+ i))))
+				 :key key :test test :end i)))
 	     (when pos (funcall report item (aref sequence pos))))))
 	(t
 	 (error 'type-error :datum sequence :expected-type 'sequence))))