On Tuesday, 23 February 2016 at 09:16:08 UTC, Nicholas Wilson wrote:
struct A
{
int blah;
}
class B
{
    A* a;
    this(A* _a)
    {
        writeln(_a)
        a =_a;
    }
}

class C : B
{
    this(A* _a)
    {
        writeln(_a)
        super(_a);
    }
}
int main(string[] args)
{
        A a;
        writeln(&a);
        C c = new C(&a);
}

prints
7FFF56E787F8
7FFF56E787F8
null

??? What is happening here?

I can't reproduce this. After making a few changes to get the code to compile (adding ; after the first two writeln's, and changing int main to void main), everything works as expected. Which compiler and version are you using?

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