Submitted by salimiles
When on level 46 & 11 you will find east of them that level 24 is directly south of level 47.

When on level 24 there is no level north of it.
When on level 47 there is no level south of it.

There may be other errors like this, but this is one that I found.

Posted by kurtisevan
Fixed      http://rb.freedroid.org/r/903/

Posted by matthiaskrgr
Fix has been committed, (3908)  but I think we should avoid the actual problem somehow (perhaps by doing something that when we define level A next to B,  B get _automatically_ defined next to A at the corresponding edge).

Posted by matthiaskrgr
I think we should make the level editor report such errors.

Posted by ahuillet
The fix having been committed, this is no longer a bug.

Posted by fluzz
This is not so easy to add in the level validator. We can only find the error by looking at the neighbors connectivity. And by transitivity, the error can be due to far neighbors connected together. So we have to inspect the whole maps in order to find the error (by creating a graph ?).

However, it could be a good exercise for a GSoC candidate...

So, you can just close the ticket, or transfer it as a RFE... 

Posted by ahuillet
Not hugely important but I agree it should be done.