Index: generic/nsf.c
===================================================================
diff -u -N -refddbeca68f9ca5c26c82a6324621ec6efa208b2 -r566ca938865b2808a5ace7e91e4138c5f0177dc6
--- generic/nsf.c	(.../nsf.c)	(revision efddbeca68f9ca5c26c82a6324621ec6efa208b2)
+++ generic/nsf.c	(.../nsf.c)	(revision 566ca938865b2808a5ace7e91e4138c5f0177dc6)
@@ -16357,7 +16357,7 @@
   Tcl_PopCallFrame(interp);
 
 #if defined(NSF_WITH_ASSERTIONS)
-  if (result == TCL_OK && (precondition || postcondition)) {
+  if (result == TCL_OK && aStore != NULL /* (precondition || postcondition)*/) {
     AssertionAddProc(interp, methodName, aStore, precondition, postcondition);
   }
 #endif