My game crashed during multiplayer game

[Sovxx]

System Information

• Operating System: Ubuntu 18.04.5 64 bit
• OpenRA Version: release-20200503
• OpenRA Mod: release-20200503
• Source: Official download package (OpenRA-Red-Alert-x86_64.AppImage)

Exception log

OpenRA engine version release-20200503
Red Alert mod version release-20200503
on map 914ab039150b80af2b929c8ff3bd9cad58c1c711 (Europe Universalis 2.1 by Mothra of maps).
Date: 2020-08-08 21:52:26Z
Operating System: Linux (Unix 4.15.0.112)
Runtime Version: Mono 6.4.0.198 (tarball Tue Sep 24 01:20:30 UTC 2019) CLR 4.0.30319.42000
Exception of type `System.IndexOutOfRangeException`: Index was outside the bounds of the array.
  at OpenRA.CellLayer`1[T].get_Item (OpenRA.CPos cell) [0x0000d] in <935747805c924a31bc5fa5fcaf2e207c>:0 
  at OpenRA.Mods.Common.Traits.Locomotor.GetCache (OpenRA.CPos cell) [0x00046] in /home/travis/build/OpenRA/OpenRA/OpenRA.Mods.Common/Traits/World/Locomotor.cs:455 
  at OpenRA.Mods.Common.Traits.Locomotor.CanStayInCell (OpenRA.CPos cell) [0x00000] in /home/travis/build/OpenRA/OpenRA/OpenRA.Mods.Common/Traits/World/Locomotor.cs:315 
  at OpenRA.Mods.Common.Traits.MobileInfo.CanStayInCell (OpenRA.World world, OpenRA.CPos cell) [0x00036] in /home/travis/build/OpenRA/OpenRA/OpenRA.Mods.Common/Traits/Mobile.cs:115 
  at OpenRA.Mods.Common.Traits.Mobile.CanStayInCell (OpenRA.CPos cell) [0x00000] in /home/travis/build/OpenRA/OpenRA/OpenRA.Mods.Common/Traits/Mobile.cs:525 
  at OpenRA.Mods.Common.Activities.MoveAdjacentTo.<CandidateMovementCells>b__14_0 (OpenRA.CPos c) [0x00000] in /home/travis/build/OpenRA/OpenRA/OpenRA.Mods.Common/Activities/Move/MoveAdjacentTo.cs:82 
  at System.Linq.Enumerable+WhereEnumerableIterator`1[TSource].MoveNext () [0x00037] in <6f6cfe3dc7984568b6f7767c7378b138>:0 
  at OpenRA.Mods.Common.Activities.MoveAdjacentTo.CalculatePathToTarget (OpenRA.Actor self, OpenRA.Traits.BlockedByActor check) [0x0008a] in /home/travis/build/OpenRA/OpenRA/OpenRA.Mods.Common/Activities/Move/MoveAdjacentTo.cs:137 
  at OpenRA.Mods.Common.Activities.MoveAdjacentTo+<>c__DisplayClass15_0.<OnFirstRun>b__0 (OpenRA.Traits.BlockedByActor check) [0x00000] in /home/travis/build/OpenRA/OpenRA/OpenRA.Mods.Common/Activities/Move/MoveAdjacentTo.cs:87 
  at OpenRA.Mods.Common.Activities.Move.EvalPath (OpenRA.Traits.BlockedByActor check) [0x00000] in /home/travis/build/OpenRA/OpenRA/OpenRA.Mods.Common/Activities/Move/Move.cs:147 
  at OpenRA.Mods.Common.Activities.Move.OnFirstRun (OpenRA.Actor self) [0x00062] in /home/travis/build/OpenRA/OpenRA/OpenRA.Mods.Common/Activities/Move/Move.cs:163 
  at OpenRA.Activities.Activity.TickOuter (OpenRA.Actor self) [0x00034] in <935747805c924a31bc5fa5fcaf2e207c>:0 
  at OpenRA.Traits.ActivityUtils.RunActivity (OpenRA.Actor self, OpenRA.Activities.Activity act) [0x00015] in <935747805c924a31bc5fa5fcaf2e207c>:0 
  at OpenRA.Activities.Activity.TickChild (OpenRA.Actor self) [0x00008] in <935747805c924a31bc5fa5fcaf2e207c>:0 
  at OpenRA.Mods.Common.Activities.MoveAdjacentTo.Tick (OpenRA.Actor self) [0x00136] in /home/travis/build/OpenRA/OpenRA/OpenRA.Mods.Common/Activities/Move/MoveAdjacentTo.cs:121 
  at OpenRA.Activities.Activity.TickOuter (OpenRA.Actor self) [0x000b5] in <935747805c924a31bc5fa5fcaf2e207c>:0 
  at OpenRA.Traits.ActivityUtils.RunActivity (OpenRA.Actor self, OpenRA.Activities.Activity act) [0x00015] in <935747805c924a31bc5fa5fcaf2e207c>:0 
  at OpenRA.Activities.Activity.TickChild (OpenRA.Actor self) [0x00008] in <935747805c924a31bc5fa5fcaf2e207c>:0 
  at OpenRA.Activities.Activity.TickOuter (OpenRA.Actor self) [0x000f9] in <935747805c924a31bc5fa5fcaf2e207c>:0 
  at OpenRA.Traits.ActivityUtils.RunActivity (OpenRA.Actor self, OpenRA.Activities.Activity act) [0x00015] in <935747805c924a31bc5fa5fcaf2e207c>:0 
  at OpenRA.Actor.Tick () [0x0000f] in <935747805c924a31bc5fa5fcaf2e207c>:0 
  at OpenRA.World.Tick () [0x00123] in <935747805c924a31bc5fa5fcaf2e207c>:0 
  at OpenRA.Game.InnerLogicTick (OpenRA.Network.OrderManager orderManager) [0x001bc] in <935747805c924a31bc5fa5fcaf2e207c>:0 
  at OpenRA.Game.LogicTick () [0x0003e] in <935747805c924a31bc5fa5fcaf2e207c>:0 
  at OpenRA.Game.Loop () [0x000f1] in <935747805c924a31bc5fa5fcaf2e207c>:0 
  at OpenRA.Game.Run () [0x0003c] in <935747805c924a31bc5fa5fcaf2e207c>:0 
  at OpenRA.Game.InitializeAndRun (System.String[] args) [0x00010] in <935747805c924a31bc5fa5fcaf2e207c>:0 
  at OpenRA.Program.Main (System.String[] args) [0x00044] in <935747805c924a31bc5fa5fcaf2e207c>:0 

Replay

Additional information

I have played several dozen times in multiplayer without issue.
There was about 8 players and it was the first time I played this custom map.
There was no significant lag and after ~5 minutes it crashed suddenly without any apparent reason.

[deleted-user-1]

This seems to be the same as #18034, #18145, so is likely already fixed for the next release by #18083. Would be good if someone from the devteam could confirm. Thanks for reporting!

[abcdefg30]

Yep, seems exactly like that.