Looks like dereferencing a null pointer, but is ok???

[Georg Wrede]

In an old message,

>> I don't think that any extra overhead is involved in slicing. 
>> D doesn't even check if a pointer is valid.
>> (That might be a gotcha come to think of it)
>>
>> void main()
>> {
>>     char[] foo = (cast(char*)null)[0..10];
>> }
> 
> Great example! I am now convinced there is nothing
>> to worry about. Thanks everyone for the help! 

I'm baffled.

I would have expected this to cause an error!

And if really not, what in the world is

    (cast(char*)null)[0..10]

supposed to mean, or return???