[OSM-talk] Circular relation by user mapper_07

[Lennard]

Shaun McDonald wrote:

>> This user, in changeset 1728656, has added relation 20773 has a member 
>> of itself.
>>
>> Is this allowed, and if yes, what does it mean, or is it an error?
> 
> Yes you can do it, though I don't have a good reason for doing such a 
> thing.

I once did that by accident, but the API wouldn't grok it:

http://trac.openstreetmap.org/ticket/2023

How did that user succeed to upload?

-- 
Lennard