Crash from maptile/tilecover/polygon.go

[glagnar]

I am getting a crash from the library - it seems the intersections array can have an uneven number of elements.

panic: runtime error: index out of range [305] with length 305

goroutine 1 [running]:
github.com/paulmach/orb/maptile/tilecover.polygon(0xc000090810, 0xc0000a66c0, 0x1, 0x1, 0x19)
	/Users/tgilbert/code/go/src/github.com/paulmach/orb/maptile/tilecover/polygon.go:82 +0x445
github.com/paulmach/orb/maptile/tilecover.Polygon(...)
	/Users/tgilbert/code/go/src/github.com/paulmach/orb/maptile/tilecover/polygon.go:22
github.com/paulmach/orb/maptile/tilecover.Geometry(0x113a220, 0xc0000a6980, 0x19, 0xc0000a6980)
	/Users/tgilbert/code/go/src/github.com/paulmach/orb/maptile/tilecover/helpers.go:29 +0xf0
github.com/alexandrainst/agentlogic.(*Mission).GeneratePath(0xc0000cfad0, 0x11123d0, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	/Users/tgilbert/code/go/src/github.com/alexandrainst/agentlogic/mission.go:188 +0x9e
main.main()
	/Users/tgilbert/code/go/src/github.com/alexandrainst/agentlogic/examples/main.go:72 +0x9c5

[paulmach]

Okay, I was able to duplicate using the code in your https://github.com/alexandrainst/agentlogic repo. I will look.

[paulmach]

This is because the rings of your polygons where not closed (start and end point the same). I update it so there is still a panic with a nicer error message.