Crash while generating map for multiple 3 position

[andkamashev]

Here are logs.
It seems always reproducable for 3 players and 3 teams and sometimes for 6.
Starting pipeline
java.util.concurrent.CompletionException: java.lang.reflect.InvocationTargetException
at java.base/java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:315)
at java.base/java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:320)
at java.base/java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1807)
at java.base/java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1796)
at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:373)
at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1182)
at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1655)
at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1622)
at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:165)
Caused by: java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:480)
at com.faforever.neroxis.mask.Mask.copy(Mask.java:890)
at com.faforever.neroxis.mask.Mask.copy(Mask.java:877)
at com.faforever.neroxis.mask.Mask.getFinalMask(Mask.java:882)
at com.faforever.neroxis.generator.texture.TextureGenerator.lambda$generatePreview$2(TextureGenerator.java:79)
at com.faforever.neroxis.util.DebugUtil.timedRun(DebugUtil.java:68)
at com.faforever.neroxis.generator.texture.TextureGenerator.generatePreview(TextureGenerator.java:76)
at java.base/java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1804)
... 6 more
Caused by: java.lang.NullPointerException: Cannot invoke "com.faforever.neroxis.util.vector.Vector.copy()" because "value" is null
at com.faforever.neroxis.mask.VectorMask.set(VectorMask.java:147)
at com.faforever.neroxis.mask.VectorMask.fill(VectorMask.java:211)
at com.faforever.neroxis.mask.VectorMask.lambda$copyFrom$7(VectorMask.java:96)
at com.faforever.neroxis.mask.Mask.enqueue(Mask.java:230)
at com.faforever.neroxis.mask.VectorMask.copyFrom(VectorMask.java:96)
at com.faforever.neroxis.mask.VectorMask.copyFrom(VectorMask.java:22)
at com.faforever.neroxis.mask.Mask.init(Mask.java:82)
at com.faforever.neroxis.mask.Mask.(Mask.java:51)
at com.faforever.neroxis.mask.OperationsMask.(OperationsMask.java:16)
at com.faforever.neroxis.mask.VectorMask.(VectorMask.java:59)
at com.faforever.neroxis.mask.Vector4Mask.(Vector4Mask.java:43)
... 18 more