[OT] OT: Null checks.

[Walter Bright]

On 5/4/2025 1:07 PM, Timon Gehr wrote:
> On 5/4/25 19:37, Walter Bright wrote:
>> Have you considered it might be a stack overflow?
> 
> Yes, that is also an option, though I think it is not very likely for this 
> particular application.

I've had many crashes due to stack overflows. The most recent was when I was 
trying to get move constructors to work, the semantic routines would go into an 
infinite recursive loop that was hard to untangle.

Code generation relies on seg faults to detect them. A guard page is inserted 
past the end of the stack allocation which generates a seg fault when it gets 
touched.

Divide by zero also generates a seg fault.