Segmentation fault from using SList in a class?

[Tim K. via Digitalmars-d-learn]

Hello!

I just started learning D and I come from a mostly C and C# 
background.
Hello World was working, so I figured that I should try something 
more complex: a template class and si I went with a simple stack.

Using dmd the code I wrote causes a segmentation fault and I am 
not sure why.

import std.stdio;
import std.container.slist;


class Stack(T)
{
     SList!(T) s;
     this() {}
     void push(T element)
     {
         s.insertFront(element);
     }
}

int main()
{
     Stack!(int) x;
     writeln("1");
     SList!(int) p;
     writeln("2");
     p.insertFront(42);
     writeln("3");
     x.push(42);
     writeln("4");
     return 0;
}


This program prints the following into the console:
% dmd test.d && ./test
1
2
3
zsh: segmentation fault  ./test


I do not understand why the normal SList works fine but the one 
inside the object doesn't. What am I overlooking?


Best regards,
Tim