Inheriting function template from super class

[Alexey via Digitalmars-d-learn]

hello.
here I have some code sample.
I'm not sure if this is my incorrect code or incorrect dmd 
behavior.
Intention is C2 to inherit C1's `void writetext(alias A1)()` and 
instantiate it with `this.writetext!(typeof(this))();`
```D
import std.stdio;
class C1
{
    void writetext()
    {
        this.writetext!(typeof(this))();
    }

    void writetext(alias A1)()
    {
        writeln("C1 writetext(alias A1) ", this);
    }
}

class C2 : C1
{
    override void writetext()
    {
        // if line 21 is commented and line 22 is uncommented - 
this compiles ok
        this.writetext!(typeof(this))();
        // super.writetext!(typeof(this))();
    }
}

void main()
{
    auto c2 = new C2;
    c2.writetext();
}

```