dmd2 assertion failure when comparing pointers

[Matthias Pleh]

Maybe a little stupid, but I get an assert when I try to compare a valid 
pointer with an int casted pointer.
I know, I could compare the pointer itself, but shouldn't is-poerator 
also work?
Also, shouldn't an assert always reproted as a bug?

struct Test {}

void main()
{
    Test t,t2;
    bool a = &t is &t2;         // -> works!
    bool b = cast(Test*)1 is &t;
    // -> Assertion failure: '0' on line 875 in file 'constfold.c'
}

greets
Matthias