a1 is a structure, one of its fields is a pointer to a variadic function ( with ... )
```
>>>print a1.deref()
Traceback (most recent call last):
File "<input>", line 1, in <module>
DbgException: File: typeinfo.cpp Line: 401 Not Implemented
```
```
>>>print a1.deref()
Traceback (most recent call last):
File "<input>", line 1, in <module>
DbgException: File: typeinfo.cpp Line: 401 Not Implemented
```