How to allocate arrays of objects?

[Mike Parker via Digitalmars-d-learn]

On Thursday, 11 February 2016 at 04:07:18 UTC, cy wrote:
> The following program segfaults for me, compiling it with 
> dmdv2.070 as well as the latest git. I must be doing it wrong. 
> There's a way to specify class construction, or emplace, or 
> something. But I can't find it! How do I deal with arrays of 
> objects?
>
> class A {
> 	int stuff;
> }
>
> void main()
> {
> 	A[] as = new A[2];
> 	assert(as.length==2);
> 	as[0].stuff = 42;
> }
>
> Looking at it in gdb, the program segfaults on "A[] as = new 
> A[2]" and never reaches "as[0].stuff = 42". But removing 
> "as[0].stuff = 42" causes the program to stop segfaulting! 
> assert(as.length == 2) doesn't get reached either.

You've allocated space for two class references, but you haven't 
actually allocated any class instances. This means both as[0] and 
as[1] are null, hence your segfault.