Index: generic/nsf.c
===================================================================
diff -u -r61d81f3da45ce76f6bb9eafa4cc8a1b4c5b08953 -rfce5c6b5a1c71088660c2d1335ac9752afb7193c
--- generic/nsf.c	(.../nsf.c)	(revision 61d81f3da45ce76f6bb9eafa4cc8a1b4c5b08953)
+++ generic/nsf.c	(.../nsf.c)	(revision fce5c6b5a1c71088660c2d1335ac9752afb7193c)
@@ -26878,8 +26878,9 @@
   parsedParamPtr->possibleUnknowns = 0;
 
   if (class == NULL) {
-    if ((object && object->flags & NSF_HAS_PER_OBJECT_SLOTS)
-        || (object && object->opt && object->opt->objMixins)
+    assert(object != NULL);
+    if ((object->flags & NSF_HAS_PER_OBJECT_SLOTS)
+        || (object->opt && object->opt->objMixins)
         ) {
       /*
        * We have object-specific parameters.  Do not use the per-class cache,