Acces Violation: assert with null instance

[Frank Benoit (keinfarbton)]

> Conceptually, assert (expression) is nothing more that "if (!expression)
> throw new AssertError;". However, it doesn't act that way.

I think it is more like
if ( expression != 0 )
  throw new AssertError;

that means .opEquals is called probably on a null reference, and so the
segfault is caused.

Hm...
Or is that what '!' does?