struct template help

[Danyal Zia via Digitalmars-d-learn]

On Saturday, 12 July 2014 at 19:09:44 UTC, seany wrote:
> Please consider the following
>
> struct arc(T,U)
> {
>
> T some_var;
> U  someother_var;
> }
>
> /* things */
>
> class myclass
> {
>   this(){}
>  ~this(){}
>   void MYfunction()
>
>   {
>     arc!(string, string[]) * a;
>     a.some_var = "hello";
>   }
> }
>
>
> void main()
> {
>   c = new myclass();
>   c.MYfunction();
> }
>
>
> This leads to a segmentation fault.
>
> What am I doing wrong?
"a" has not been instantiated. You are declaring it as a pointer 
to struct and using its fields without initializing it. 
"arc!(string, string[]) a;" will work.