Problem with clear on shared associative array?

[Andy Valencia via Digitalmars-d-learn]

The following code fails to compile; it appears from the error 
message that the library's clear() function is not ready to act 
on a shared AA?

synchronized class F {
private:
    string[int] mydict;

public:
    void clear() {
        this.mydict.clear();
    }
}

void
main()
{
    auto f = new shared F();
    f.clear();
}