--- Firebird-3.0.1.32609-0/src/common/classes/init.h.orig	2016-10-07 00:30:20.110681159 +0200
+++ Firebird-3.0.1.32609-0/src/common/classes/init.h	2016-10-07 00:27:47.820536592 +0200
@@ -121,7 +121,8 @@
 public:
 	void dtor()
 	{
-		delete instance;
+		if (instance)
+			delete instance;
 		instance = 0;
 	}