diff for fixing assigning a Slip to scalar

gistfile1.txt

diff --git a/src/core/SlippyIterator.pm b/src/core/SlippyIterator.pm
index 1b5dd5b..107f70d 100644
--- a/src/core/SlippyIterator.pm
+++ b/src/core/SlippyIterator.pm
@@ -8,13 +8,18 @@ my role SlippyIterator does Iterator {
     has $!slip-iter;
 
     proto method start-slip(|) { * }
-    multi method start-slip(Slip:U $slip) {
-        $slip
+    multi method start-slip(Slip:U \slip) {
+        slip
     }
-    multi method start-slip(Slip:D $slip) {
-        $!slipping = 1;
-        $!slip-iter := $slip.iterator;
-        self.slip-one()
+    multi method start-slip(Slip:D \slip) {
+        if nqp::iscont(slip) {
+            slip
+        }
+        else {
+            $!slipping = 1;
+            $!slip-iter := slip.iterator;
+            self.slip-one()
+        }
     }
 
     method slip-one() {