Re: Segmentation fault on VADSself

[Simon Wright <simon@pogner.demon.co.uk>]

David Tannen <bluesguy@jcdisciples.org> writes:

> Another area that could be causing problems would be 
> anyplace where you *might* have variant records that
> are being allocated space by the following method:
> 1.  You have a standard record the same size as your 
>     largest variant.
> 2.  You have access types for the standard & variant
>     record.
> 3.  You use 'is new' to create space with the standard
>     record.
> 4.  You then use unchecked conversion between the 
>     two different access types.
> 
> You will find that the moment you try to access a
> part of memory associated with the variant part of
> the record, you get a core dump.

This sounds like bitter exerience speaking :-)

My advice, FWIW, would have been to find another way of solving this
problem that didn't involve variant records; it sounds horribly
non-portable!