if (X !is null && X.Y !is null) access crash

[Amex]

On Monday, 10 June 2019 at 19:48:18 UTC, Steven Schveighoffer 
wrote:
> On 6/9/19 1:25 AM, Amex wrote:
>> On Saturday, 8 June 2019 at 20:44:13 UTC, Steven Schveighoffer 
>> wrote:
>>> Try GC.addRef on the X reference, and see if it helps.
>>>
>> 
>> This is during shutdown so I imagine simply turning off the GC 
>> should work fine? That way it prevents all cases rather than 
>> having to add a bunch of specific cases each time they crop up.
>
> I'm not sure if you can shut off the final collection. All you 
> can do is disable collections during allocations.
>
> -Steve

So far it seems to be working. It may prevent a collection at the 
right time that causes the problem... it all may be coincidence.