Errors while running 6_angle_tiles.go

[mayank2]

I tried to run 6_angle_tiles.go by following the instructions in "Map Inference for Interactive Mapping" in README, but got the following errors while running go run 6_angle_tiles.go data/graphs data/angles:

./6_angle_tiles.go:46:19: cannot use graph.GridIndex(256) (type common.GraphGridIndex) as type common.GridIndex in field value
./6_angle_tiles.go:90:22: edge.Segment undefined (type int has no field or method Segment)
./6_angle_tiles.go:92:19: cannot use edge (type int) as type *common.Edge in assignment