Error when stepping on the downstairs on CoC:6

[Grond]

Game continued working after the error.

‌

Ultimate ADOM - Caverns of Chaos
Version 0.1.1 - 4/30/2020 2:41:34 PM

Player action execution crashed.

Stack empty.

System.InvalidOperationException: Stack empty.
at System.Collections.Generic.Stack1[T].Pop () [0x00008] in <ae22a4e8f83c41d69684ae7f557133d9>:0 at UA.GameEngine.ECS.Systems.ZoneMaps.MapCell.PostprocessTarget (UA.Events.IEventTarget2[TET,TE] target, UA.GameEngine.Events.GameEvent ev) [0x00000] in <73eea6debb434445915ee88bfca7671d>:0
at UA.Events.EventDispatcher2[TT,TE].PropagateEvent (TE ev) [0x00088] in <73eea6debb434445915ee88bfca7671d>:0 at UA.GameEngine.ECS.Systems.ZoneMaps.MapCell.PropagateEvent (UA.GameEngine.Events.GameEvent ev) [0x0008d] in <73eea6debb434445915ee88bfca7671d>:0 at UA.GameEngine.ECS.Entities.Entity.PropagateEvent (UA.GameEngine.Events.GameEvent gameEvent) [0x001a7] in <73eea6debb434445915ee88bfca7671d>:0 at UA.GameEngine.ECS.Entities.EntityReference.PropagateEvent (UA.GameEngine.Events.GameEvent gameEvent) [0x00006] in <73eea6debb434445915ee88bfca7671d>:0 at UA.GameEngine.ECS.Systems.Entities.EntitySystem.GetContainerInstance (UA.GameEngine.ECS.Entities.IEntity entity, System.String containerName) [0x00007] in <73eea6debb434445915ee88bfca7671d>:0 at UA.GameEngine.ECS.Systems.ItemManagement.ItemManagementSystem.GetBackPack (UA.GameEngine.ECS.Entities.IEntity entity) [0x0000a] in <73eea6debb434445915ee88bfca7671d>:0 at UA.GameEngine.ECS.Systems.Encumbrance.Lib.SlotBasedEncumbranceManagementAlgorithm.CalculateUnmodifiedTotalWeight (UA.GameEngine.ECS.Entities.IEntity entity) [0x00030] in <73eea6debb434445915ee88bfca7671d>:0 at UA.GameEngine.ECS.Systems.Encumbrance.Lib.Base.EncumbranceManagementAlgorithmBase.GetFullyModifiedTotalWeight (UA.GameEngine.ECS.Entities.IEntity entity) [0x00000] in <73eea6debb434445915ee88bfca7671d>:0 at UA.GameEngine.ECS.Systems.Encumbrance.Lib.SlotBasedEncumbranceManagementAlgorithm.GetTranslatedEncumbranceInfoLineFor (UA.GameEngine.ECS.Entities.IEntity entity) [0x0000a] in <73eea6debb434445915ee88bfca7671d>:0 at UA.GameEngine.ECS.Systems.Encumbrance.EncumbranceSystem.GetTranslatedEncumbranceInfoLineFor (UA.GameEngine.ECS.Entities.IEntity entity) [0x00000] in <73eea6debb434445915ee88bfca7671d>:0 at UA.UserInterface.DetailLevels.StatisticalDetailConfiguration+<>c.<.cctor>b__42_20 () [0x00019] in <73eea6debb434445915ee88bfca7671d>:0 at UA.UserInterface.DetailLevels.StatisticalDetailConfiguration.GetValueForVisibleDetailSetting (UA.UserInterface.DetailLevels.DetailSetting setting) [0x0000b] in <73eea6debb434445915ee88bfca7671d>:0 at UA.GameEngine.GameInfo.DetailedInformation.StatisticsInfo..ctor (UA.GameEngine.ECS.Entities.IEntity entity) [0x0023e] in <73eea6debb434445915ee88bfca7671d>:0 at UA.UserInterface.Signals.Lib.UpdateStatisticsUiSignal..ctor (UA.GameEngine.ECS.Entities.IEntity signaledEntity) [0x00010] in <73eea6debb434445915ee88bfca7671d>:0 at UA.GameEngine.ECS.Systems.Brains.Player.PlayerBrain.UpdateStatistics () [0x00011] in <73eea6debb434445915ee88bfca7671d>:0 at UA.GameEngine.ECS.Systems.Actors.ActorSystem.PassTurnForActor (UA.GameEngine.ECS.Entities.IEntity actor, System.Action1[T] act) [0x001cb] in <73eea6debb434445915ee88bfca7671d>:0
at UA.GameEngine.ECS.Systems.GameCommands.GameCommandSystem.ExecutePlayerAction (UA.GameEngine.ECS.Entities.IEntity target, System.Action`1[T] act) [0x00109] in <73eea6debb434445915ee88bfca7671d>:0
at UA.GameEngine.ECS.Systems.GameCommands.GameCommandSystem.MoveWest () [0x00010] in <73eea6debb434445915ee88bfca7671d>:0
at UA.Bus.UltimateUserInterfaceGameEngineServiceBus.ProcessTasks () [0x00081] in <73eea6debb434445915ee88bfca7671d>:0