Polygon decomposition fails for simple polygon with an edge on the negative dateline

[iverase]

The following polygon fails indexing:

"POLYGON((-180 62.288856810085,-178.761 63.4792,-180 63.7639,-180 63.763900213475,-180 62.288856810085))"

This is a simple triangle with one edge along the dateline. After going through decomposition, an extra polygon is generated that looks like

POLYGON ((-180.0 62.288856810085, -180.0 63.7639, -180.0 63.763900213475, -180.0 62.288856810085))

That is an invalid polygon and makes indexing fail.

[elasticmachine]

Pinging @elastic/es-analytics-geo (Team:Analytics)

[iverase]

Having a closer look into the polygon, the issue here is that t looking at the last three points:

point1 = [-180, 63.7639]
point2 = [-180, 63.763900213475] -> goes just slightly north of point 1
point3 =[-180, 62.288856810085] -> goes south of point 1

Therefore the edge is running over it self and that is not allowed. This is expected, the error message could be improved but that is a much bigger ask, therefore I am closing this issue as it is not really a bug.