several buildings have been create using id, where some nodes are used multiple times - for example, see :
(i'm leaving them unfixed as that might help to find out the cause)
would be nice finding out how this can happen, and maybe also have some internal validation ?
Not seeing a problem with any of those ways. Having start == end is the normal state of affairs; that's how areas are represented in OSM.
I think the issue is that there are multiple coincident nodes.
right, sorry for not being more specific. see the screeshot with josm segment numbering enabled. the selection (red node at the top) is actually two nodes.
Prevent creation of ways with duplicate nodes
Related to #1249
The only I have been able to reproduce ways like this is by holding down alt and clicking twice, which seems a bit uncommon to hit. It might also possible that the first node doesn't get rendered before the second click in a doubleclick, making it not count as a click on a node. I don't know enough to say whether this is possible.
Added a checking in a8f41b8 to stop this if it is one of the above two cases. Any more info on how these were made would be great.
@richlv please let us know if there's some other way to replicate this.
sorry, i do not know how this was done - just spotted it in the data, created by a new user. thanks for the checks, hopefully they will help
This seems to be happening again.
See how node/2561324153, node/2561324155 and node/2561324157 of way/249554566 are all the same. (full list)
Let's see if #2135 fixes this -- let me know if you see it with iD 1.3.7 or later.
Yes we do: