Invalid perception sent to agent

[xtuc]

ba train -map labyrinth --agent sven
  ├ version: dev-2018-01-05_08:29:41
  └ Failed to send perception
    ├ agent: 0e91acc7-71f7-424f-b47a-d501c4d86471
    └ write tcp4 192.168.1.55:36085->172.17.0.2:40152: write: broken pipe

The agent unexpectedly disconnected (because it crashed, see following log)

Agent log:

[agent] [sven:latest] undefined:1
[agent] [sven:latest] {"method":"perception","payload":{"score":0,"energy":0,"velocity":[0,1.25],"azimuth":0.6159502219252506,"vision":[{"tag":"obstacle","nearedge":[13.836839917699558,2.439808205234344],"center":[7.15276183843132,24.12687101970846],"faredge":[0.4686837591630814,45.81393383418258],"velocity":[0,0]},{"tag":"obstacle","nearedge":[0,2.152650407040147],"center":[0,15.52964688272233],"faredge":[0,28.906643358404516],"velocity":[0,0]},{"tag":"obstacle","nearedge":[0,28.906643358404516],"center":[0,38.12063086119268],"faredge":[0,47.33461836398085],"velocity":[0,0]},{"tag":"obstacle","nearedge":[-4.381310039920868e-13,47.33461836308098],"center":[-4.381310039920868e-13,47.33461836308098],"faredge":[-4.381310039920868e-13,47.33461836308098],"velocity":[0,0]},{"tag":"obstacle","nearedge":[NaN,NaN],"center":[NaN,NaN],"faredge":[NaN,NaN],"velocity":[0,0]},{"tag":"obstacle","nearedge":[0,47.33461836398085],"center":[0,62.43351807102066],"faredge":[0,77.53241777806046],"velocity":[0,0]},{"tag":"obstacle","nearedg
[agent] [sven:latest]
[agent] [sven:latest] SyntaxError: Unexpected token N in JSON at position 786
[agent] [sven:latest]     at JSON.parse (<anonymous>)
[agent] [sven:latest]     at Interface.onGameServerData (/usr/app/node_modules/bytearena-sdk-comm/lib/index.js:68:24)
[agent] [sven:latest]     at emitOne (events.js:96:13)
[agent] [sven:latest]     at Interface.emit (events.js:191:7)
[agent] [sven:latest]     at Interface._onLine (readline.js:241:10)
[agent] [sven:latest]     at Interface._normalWrite (readline.js:384:12)
[agent] [sven:latest]     at Socket.ondata (readline.js:101:10)
[agent] [sven:latest]     at emitOne (events.js:96:13)
[agent] [sven:latest]     at Socket.emit (events.js:191:7)
[agent] [sven:latest]     at readableAddChunk (_stream_readable.js:178:18)

The agent logged undefined might be a hint here.