Multicellular crash with System.ArgumentException: Intended new member index may not be 0

Bug Reports
1

I ate a cell and it crashed

I’m not sure if it matters, but I did also earlier gain my second multi-cell cell, and it immediately died due to spawning on a cell with spikes, I’m not sure if the issue was with me gaining another cell thinking its the third when it was in truth the second once again.

2

Looking at the log, this is not related to engulfing at all. Here’s the error from the log:

ERROR: Unhandled Exception:
ERROR: System.ArgumentException: Intended new member index may not be 0
ERROR: 
ERROR:   at Components.MicrobeColonyHelpers.FinishQueuedMemberAdd (Components.MicrobeColony& colony, DefaultEcs.Entity& colonyEntity, System.Int32 parentIndex, DefaultEcs.Entity newMember, System.Int32 intendedNewMemberIndex, DefaultEcs.Command.EntityCommandRecorder recorder) [0x0002c] in <08f4d4f178ae431ca005620580334d34>:0 
ERROR: 
ERROR:   at Systems.DelayedColonyOperationSystem.CompleteDelayedColonyAttach (Components.MicrobeColony& colony, DefaultEcs.Entity& colonyEntity, DefaultEcs.Entity& entity, DefaultEcs.Command.EntityCommandRecorder recorder, System.Int32 targetMemberIndex) [0x0000d] in <08f4d4f178ae431ca005620580334d34>:0 
ERROR: 
ERROR:   at Systems.DelayedColonyOperationSystem.Update (System.Single delta, DefaultEcs.Entity& entity) [0x00071] in <08f4d4f178ae431ca005620580334d34>:0 
ERROR: 
ERROR:   at DefaultEcs.System.AEntitySetSystem`1[T].Update (T state, System.ReadOnlySpan`1[T] entities) [0x0000f] in <71cea9262b2d4f47b57b59fbd6ae9b26>:0 
ERROR: 
ERROR:   at DefaultEcs.System.AEntitySetSystem`1[T].Update (T state) [0x000c3] in <71cea9262b2d4f47b57b59fbd6ae9b26>:0 
ERROR: 
ERROR:   at MicrobeWorldSimulation.OnProcessFixedLogic (System.Single delta) [0x0027d] in <08f4d4f178ae431ca005620580334d34>:0 
ERROR: 
ERROR:   at WorldSimulation.ProcessLogic (System.Single delta) [0x00092] in <08f4d4f178ae431ca005620580334d34>:0 
ERROR: 
ERROR:   at WorldSimulation.ProcessAll (System.Single delta) [0x00000] in <08f4d4f178ae431ca005620580334d34>:0 
ERROR: 
ERROR:   at MicrobeStage._Process (System.Single delta) [0x00083] in <08f4d4f178ae431ca005620580334d34>:0

That’s a known crash related to colony regrowth after losing cells. It should be fixed in 0.6.4.1 already, so could you please update the Thrive version you are playing?