Index: generic/nsf.c
===================================================================
diff -u -rda6d8cc3d3c239c24849b7e42cc4c9878af9e175 -rf01f68eae4db5c767f8d5ce3cd0e366fb298b73b
--- generic/nsf.c	(.../nsf.c)	(revision da6d8cc3d3c239c24849b7e42cc4c9878af9e175)
+++ generic/nsf.c	(.../nsf.c)	(revision f01f68eae4db5c767f8d5ce3cd0e366fb298b73b)
@@ -5347,9 +5347,11 @@
   unsigned int frameFlags;
   Tcl_Obj *key;
 
+#if defined(NSF_DEVELOPMENT)
   nonnull_assert(interp != NULL);
   nonnull_assert(varName != NULL);
   nonnull_assert(varPtr != NULL);
+#endif
 
 #if defined(VAR_RESOLVER_TRACE)
   fprintf(stderr, "NsColonVarResolver '%s' flags %.6x\n", varName, flags);
Index: generic/nsf.h
===================================================================
diff -u -rf0f87b41b6bb57a518fc1bc52fd2f3422d7a9b07 -rf01f68eae4db5c767f8d5ce3cd0e366fb298b73b
--- generic/nsf.h	(.../nsf.h)	(revision f0f87b41b6bb57a518fc1bc52fd2f3422d7a9b07)
+++ generic/nsf.h	(.../nsf.h)	(revision f01f68eae4db5c767f8d5ce3cd0e366fb298b73b)
@@ -1,7 +1,7 @@
 /*
  *  Next Scripting Framework
  *
- *  Copyright (C) 1999-2017 Gustaf Neumann (a) (b)
+ *  Copyright (C) 1999-2021 Gustaf Neumann (a) (b)
  *  Copyright (C) 1999-2007 Uwe Zdun (a) (b)
  *  Copyright (C) 2007-2008 Martin Matuska (b)
  *  Copyright (C) 2010-2017 Stefan Sobernig (b)
@@ -196,7 +196,11 @@
 # define NSF_DTRACE_METHOD_RETURN_PROBE(cscPtr,retCode) {}
 #endif
 
-#if defined(NSF_DEVELOPMENT_FULL) && !defined(NSF_DEVELOPMENT)
+/*
+ * When intense developent is activated, make sure that also the base
+ * level development mode is activated.
+ */
+#if defined(NSF_DEVELOPMENT_TEST) && !defined(NSF_DEVELOPMENT)
 # define NSF_DEVELOPMENT 1
 #endif