Not sure, but is the i-- on line 93 erroneous? As i will be decremented at the end of the loop anyway, it seems to me that the extra decrement will give rise to the possibility that a Coord won't be tested to see if it's a CoordNode and so it will get zapped if it's not outside the error tolerance? Do we care?
I vote for "bug" here. I've removed the "i--" on line 93 and I see no problems when compiling a map.
The original code was from me. This additional i-- was some sort of optimization. Example: Line with 10 points Point 5 is a node. So the segment between 5 and 10 gets straightened. Afterwards I would test point 4. But between point 4 and 5 is only a straight line, so it doesn't make sense to test them. I can continue with segment 3 to 5. But you are right. If point 4 is a CoordNode then the endpoint should not be zapped. So it is a small bug, but will probably not help at the overview map. Well watched. Please commit that change. Regards, Johann