InfluenceMapBuilder#lambda$getBattleDetails$3:97 - java.lang.NullPointerException

[tripleabuilderbot]

Log Message

Failed to start game

TripleA Version

2.7.14848

Java Version

11.0.19

Operating System

Windows 10

Heap Size

8178M

Stack Trace

Exception: java.lang.NullPointerException 
java.lang.Exception
	at org.triplea.ai.flowfield.influence.InfluenceMapBuilder.lambda$getBattleDetails$3(InfluenceMapBuilder.java:97)
	at org.triplea.ai.flowfield.influence.InfluenceMap.diffuseBattleDetails(InfluenceMap.java:153)
	at org.triplea.ai.flowfield.influence.InfluenceMap.<init>(InfluenceMap.java:45)
	at org.triplea.ai.flowfield.influence.InfluenceMapBuilder.lambda$buildCombatMaps$1(InfluenceMapBuilder.java:66)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
	at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
	at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578)
	at org.triplea.ai.flowfield.influence.InfluenceMapBuilder.buildCombatMaps(InfluenceMapBuilder.java:67)
	at org.triplea.ai.flowfield.influence.InfluenceMapBuilder.buildMaps(InfluenceMapBuilder.java:41)
	at org.triplea.ai.flowfield.FlowFieldAi.lambda$setupDiffusionMaps$2(FlowFieldAi.java:134)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
	at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
	at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
	at java.base/java.util.Iterator.forEachRemaining(Iterator.java:133)
	at java.base/java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
	at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658)
	at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:274)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
	at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
	at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578)
	at org.triplea.ai.flowfield.FlowFieldAi.setupDiffusionMaps(FlowFieldAi.java:140)
	at org.triplea.ai.flowfield.FlowFieldAi.initialize(FlowFieldAi.java:38)
	at games.strategy.engine.framework.AbstractGame.setupLocalPlayers(AbstractGame.java:85)
	at games.strategy.engine.framework.AbstractGame.<init>(AbstractGame.java:65)
	at games.strategy.engine.framework.ServerGame.<init>(ServerGame.java:119)
	at games.strategy.engine.framework.ServerGame.<init>(ServerGame.java:101)
	at games.strategy.engine.framework.startup.launcher.LocalLauncher.loadGame(LocalLauncher.java:69)
	at games.strategy.engine.framework.startup.launcher.LocalLauncher.launch(LocalLauncher.java:59)
	at games.strategy.engine.framework.startup.ui.panels.main.MainPanelBuilder.lambda$launch$3(MainPanelBuilder.java:58)
	at java.base/java.lang.Thread.run(Thread.java:829)

[TheDog-GH]

ai flowfield is a test ai and should be removed from the 2.7 build.

@frigoref @asvitkine please could you do the honours.