Invalid output for the following arguments.

[hxtk]

$ bazel-bin/RoutePlanner --key $(cat api.key) "Columbia, SC" "Riley Moore Falls Trail, Westminster, SC" "Raven Cliff Falls, SC" "Carrick Falls, SC" "Twin Falls, Water Falls Road, Sunset, SC" "Cherry Hill Campground, SC" "Blue Hill Falls, Rich Mountain Road, Mountain Rest, SC" "Brasstown Falls, SC" --scenic        
We couldn't resolve the leg between "Columbia, SC, USA" and "", so we're trying to route around it.
We couldn't resolve the leg between "Riley Moore Falls Trail, Westminster, SC 29693, USA" and "", so we're trying to route around it.
We couldn't resolve the leg between "Raven Cliff Falls, South Carolina 29635, USA" and "", so we're trying to route around it.
We couldn't resolve the leg between "388 Table Rock State Park Rd, Pickens, SC 29671, USA" and "", so we're trying to route around it.
We couldn't resolve the leg between "Twin Falls, Water Falls Rd, Sunset, SC 29685, USA" and "", so we're trying to route around it.
We couldn't resolve the leg between "CHERRY HILL CAMPGROUND, SC-107, Walhalla, SC 29691, USA" and "", so we're trying to route around it.
We couldn't resolve the leg between "" and "Columbia, SC, USA", so we're trying to route around it.
We couldn't resolve the leg between "" and "Riley Moore Falls Trail, Westminster, SC 29693, USA", so we're trying to route around it.
We couldn't resolve the leg between "" and "Raven Cliff Falls, South Carolina 29635, USA", so we're trying to route around it.
We couldn't resolve the leg between "" and "388 Table Rock State Park Rd, Pickens, SC 29671, USA", so we're trying to route around it.
We couldn't resolve the leg between "" and "Twin Falls, Water Falls Rd, Sunset, SC 29685, USA", so we're trying to route around it.
We couldn't resolve the leg between "" and "CHERRY HILL CAMPGROUND, SC-107, Walhalla, SC 29691, USA", so we're trying to route around it.
We couldn't resolve the leg between "" and "Creek, Westminster, SC 29693, United States", so we're trying to route around it.
We couldn't resolve the leg between "Creek, Westminster, SC 29693, United States" and "", so we're trying to route around it.
CHERRY HILL CAMPGROUND, SC-107, Walhalla, SC 29691, USA ->
Twin Falls, Water Falls Rd, Sunset, SC 29685, USA ->
388 Table Rock State Park Rd, Pickens, SC 29671, USA ->
Raven Cliff Falls, South Carolina 29635, USA ->
Columbia, SC, USA ->
 ->
Creek, Westminster, SC 29693, United States ->
Riley Moore Falls Trail, Westminster, SC 29693, USA ->
CHERRY HILL CAMPGROUND, SC-107, Walhalla, SC 29691, USA
Total distance: -5731137678988703mi

[hxtk]

This is inconsistent; identical inputs fail to reproduce the bug at a later time.