当通过引用设置返回时，Linux中的Firebird UDF会崩溃服务器

I'm trying to create some simple UDF for firebird in Linux (in C compiled with GCC). The problem is, that when I set "Return mechanism" to be "by reference", when I call the function, the server crashes. When it's "by value", there's no problem.I'm trying to create some simple UDF for firebi