C string to D without memory allocation?

[Shriramana Sharma via Digitalmars-d-learn]

Jonathan M Davis via Digitalmars-d-learn wrote:

> If it isn't, all that means is that the
> array's capacity will be 0, so it's going to have to reallocate

So it's safe to return a string produced by fromStringz without having to 
worry that the user would append to it?

Then why is it marked @system? Only because one cannot be sure that the 
input point refers to a valid null-terminated string?

-- 
Shriramana Sharma, Penguin #395953