Update example-during-criterion-snapshotting.rkt

racket/syndicate/examples/actor/example-during-criterion-snapshotting.rkt

@@ -10,7 +10,7 @@
 ;; Correct output:
 ;; x=123 v=999
 ;; x=124 v=999
-;; finally for x=124 v=999
+;; finally for x0=123 x=124 v=999
 ;;
 ;; Should eventually be turned into some kind of test case.
 
@@ -19,7 +19,8 @@
 (spawn (field [x 123])
        (assert (foo (x) 999))
        (during (foo (x) $v)
+               (define x0 (x))
                (log-info "x=~a v=~a" (x) v)
                (when (= (x) 123) (x 124))
                (on-stop
-                (log-info "finally for x=~a v=~a" (x) v))))
+                (log-info "finally for x0=~a x=~a v=~a" x0 (x) v))))