Index: prg_exec_fail3.cpp
===================================================================
--- prg_exec_fail3.cpp	(revision 41069)
+++ prg_exec_fail3.cpp	(working copy)
@@ -13,6 +13,7 @@
 //  user fatal exceptions. Should fail during run. But not crash.
 // ***************************************************************************
 
+#undef NDEBUG
 #include <cassert>
 
 int cpp_main( int, char *[] )  // note the name