Crash while building rails

Crashed, no idea why. I have mods active, but apparently none of them has something to do with the issue.

I was building some transport rails.

Assert failed: FindNextChore found an entry that wasn't a FetchChore

  at LogCatcher.UnityEngine.ILogHandler.LogFormat (UnityEngine.LogType logType, UnityEngine.Object context, System.String format, System.Object[] args) [0x00000] in <365ccbe55b71497692a2358df9c3c627>:0 
  at LogCatcher.UnityEngine.ILogHandler.LogFormat (UnityEngine.LogType logType, UnityEngine.Object context, System.String format, System.Object[] args) [0x00000] in <365ccbe55b71497692a2358df9c3c627>:0 
  at UnityEngine.Logger.Log (UnityEngine.LogType logType, System.Object message) [0x00000] in <f54de29543b44ca89695b41bc5ecd6e0>:0 
  at UnityEngine.Debug.LogError (System.Object message) [0x00000] in <f54de29543b44ca89695b41bc5ecd6e0>:0 
  at Debug.LogError (System.Object obj) [0x00000] in <c4d5ef049b4a4bb1a30afe1e39fed4d5>:0 
  at Debug.Assert (System.Boolean condition, System.Object message) [0x00000] in <c4d5ef049b4a4bb1a30afe1e39fed4d5>:0 
  at DebugUtil.Assert (System.Boolean test, System.String message) [0x00000] in <c4d5ef049b4a4bb1a30afe1e39fed4d5>:0 
  at ChoreConsumer+<>c.<.cctor>b__75_0 (System.Object obj, ChoreConsumer consumer) [0x00000] in <365ccbe55b71497692a2358df9c3c627>:0 
  at ScenePartitioner.VisitEntries[ContextType] (System.Int32 x, System.Int32 y, System.Int32 width, System.Int32 height, ScenePartitionerLayer layer, System.Func`3[T1,T2,TResult] visitor, ContextType context) [0x00000] in <365ccbe55b71497692a2358df9c3c627>:0 
  at GameScenePartitioner.VisitEntries[ContextType] (System.Int32 x, System.Int32 y, System.Int32 width, System.Int32 height, ScenePartitionerLayer layer, System.Func`3[T1,T2,TResult] visitor, ContextType context) [0x00000] in <365ccbe55b71497692a2358df9c3c627>:0 
  at ChoreConsumer.FindNextChore (Chore+Precondition+Context& out_context) [0x00000] in <365ccbe55b71497692a2358df9c3c627>:0 
  at SolidTransferArm.Sim () [0x00000] in <365ccbe55b71497692a2358df9c3c627>:0 
  at SolidTransferArm+SolidTransferArmBatchUpdater.Finish () [0x00000] in <365ccbe55b71497692a2358df9c3c627>:0 
  at SolidTransferArm.BatchUpdate (System.Collections.Generic.List`1[T] solid_transfer_arms, System.Single time_delta) [0x00000] in <365ccbe55b71497692a2358df9c3c627>:0 
  at UpdateBucketWithUpdater`1[DataType].Update (System.Single dt) [0x00000] in <c4d5ef049b4a4bb1a30afe1e39fed4d5>:0 
  at StateMachineUpdater+BucketGroup.AdvanceOneSubTick (System.Single dt) [0x00000] in <c4d5ef049b4a4bb1a30afe1e39fed4d5>:0 
  at StateMachineUpdater.AdvanceOneSimSubTick () [0x00000] in <c4d5ef049b4a4bb1a30afe1e39fed4d5>:0 
  at Game.SimEveryTick (System.Single dt) [0x00000] in <365ccbe55b71497692a2358df9c3c627>:0 
  at Game.Update () [0x00000] in <365ccbe55b71497692a2358df9c3c627>:0 
Build: U59-737790-SCRPAN