https://issues.dlang.org/show_bug.cgi?id=21762
--- Comment #2 from [email protected] --- This is probably caused by the forward reference of the destructors. The non-templated next() instantiates A!C before the semantic of C is done and before __xdtor is generated. A!C's destructor then instantiates destroy which omits the dtor call because it's not yet available. --
