Index: src/include/cassert
===================================================================
--- src/include/cassert	(revision e3e16bcf91a7300a6d1f71eaad04e2f3f498cfc2)
+++ src/include/cassert	(revision a117f7c8c1b582839efb906967e6dda9e0840614)
@@ -41,5 +41,5 @@
 static inline T strict_dynamic_cast( const U & src ) {
 	T ret = dynamic_cast<T>(src);
-	assert(ret);
+	assertf(ret, "%s", toString(src).c_str());
 	return ret;
 }