alias this and null reference

[Namespace]

On Friday, 27 April 2012 at 16:49:49 UTC, Simen Kjaeraas wrote:
> On Friday, 27 April 2012 at 16:36:04 UTC, Namespace wrote:
>> By the following code i get a normal Access Violation.
>> My question is: why? Even if "f0" is null, the object must be
>> converted to Ref and there i check if the given object is null.
>
> When trying to convert f0 to Ref, the compiler has to look in 
> the
> vtable for the getRef function. The vtable is in a nonsensical
> place when the class reference is null, and thus it bails out.
>
> Solution: mark getRef as final.

Great, thank you for reply, it works :).
It is maybe possible, that I get another error output as "null 
this"?
Maybe an assert or something else?