Index: trunk/processor/main.m4
===================================================================
--- trunk/processor/main.m4	(revision 836)
+++ trunk/processor/main.m4	(revision 837)
@@ -181,4 +181,5 @@
 	IFDASM(`add_assoc_null_ex(dst, ZEND_STRS("$2"));')
 	IFNOTMEMCPY(`IFCOPY(`$1 = NULL;')')
+	assert(patsubst($1, dst, src) == NULL);
 ')
 dnl }}}