Index: generic/nsf.c
===================================================================
diff -u -r90b61f5c2dee270715b218d99e671029f8ff61f6 -raf4c49445c888e9b52f1563d5dea90f39373722a
--- generic/nsf.c	(.../nsf.c)	(revision 90b61f5c2dee270715b218d99e671029f8ff61f6)
+++ generic/nsf.c	(.../nsf.c)	(revision af4c49445c888e9b52f1563d5dea90f39373722a)
@@ -18822,7 +18822,7 @@
     NsfCommandPreserve(tcd->cmd);
   }
   
-  nonnull_assert(tcd->cmd != NULL);
+  assert(tcd->cmd != NULL);
 
   pcPtr = (ParseContext *) NsfTclStackAlloc(interp, sizeof(ParseContext),
                                             "parse context");