Worst ideas/features in programming languages?

[Araq]

On Friday, 15 October 2021 at 16:10:04 UTC, IGotD- wrote:
> On Friday, 15 October 2021 at 16:05:13 UTC, Araq wrote:
>>
>> Er, that's not how Nim's "fat pointers" work and the term is 
>> either misleading or wrong, sizeof(ref) == sizeof(void*) in 
>> Nim land.
>
> So how do they work then, when you have set the GC to default 
> ORC?

The RC and metadata are stored at negative offsets.