Index: generic/nsf.c
===================================================================
diff -u -N -rad4244a23851406ab1f13bb20c1815e1ea5fce76 -r8f7cd2c3d585aed670c84c8a2db53f45244c066a
--- generic/nsf.c	(.../nsf.c)	(revision ad4244a23851406ab1f13bb20c1815e1ea5fce76)
+++ generic/nsf.c	(.../nsf.c)	(revision 8f7cd2c3d585aed670c84c8a2db53f45244c066a)
@@ -3282,7 +3282,7 @@
    * Otherwise clear cl->order if necessary.
    */
   if (likely(success)) {
-    AssertOrderIsWhite(cl->order);
+    AssertOrderIsWhite(class->order);
     /*
      * TopoSortSuper succeeded, the cl-order is already set.
      */