import std.stdio;

​

struct S { ulong u = 42; }

​

void main()

{

    S* s = new S;

​

    writeln(cast(void*) typeid(s));     

​

    ubyte* support = *(cast(ubyte**)&s);

    writeln(*cast(ulong*)(support));    // S.u

    *cast(ulong*)(support + 8) = 0UL;   // clear trailing stuff

​

    writeln(cast(void*) typeid(s));     // not corrupted <=> trailing stuff unused ?

}