Server Exception in logs (no crash) linked to BlockIem.Drop

[Thibault-Brocheton]

Hey, on the Incroyaux server we are experiencing a user crash

Stacktrace:

[21:34:57.623] [249] [Error] [Eco] System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
 ---> System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
 ---> System.NullReferenceException: Object reference not set to an instance of an object.
   at Eco.Gameplay.Items.BlockItem.Drop(Player player, InteractionTriggerInfo triggerInfo, InteractionTarget target)
   at InvokeStub_BlockItem.Drop(Object, Span`1)
   at System.Reflection.MethodBaseInvoker.InvokeWithFewArgs(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   --- End of inner exception stack trace ---
   at System.Reflection.MethodBaseInvoker.InvokeWithFewArgs(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at Eco.Core.Controller.ControllerManager.HandleViewRPC(INetClient client, Int32 universalID, String methodIdOrName, BSONObject bson)
   at InvokeStub_Client.ViewRPC(Object, Span`1)
   at System.Reflection.MethodBaseInvoker.InvokeWithFewArgs(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   --- End of inner exception stack trace ---
   at System.Reflection.MethodBaseInvoker.InvokeWithFewArgs(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at Eco.Shared.Networking.RPCManager.InvokeOn(INetClient client, BSONObject bson, Object target, String methodName)
   at Eco.Shared.Networking.RPCManager.HandleReceiveRPC(INetClient client, BSONObject bson)
   at Eco.Plugins.Networking.NetworkServer.Eco.Shared.Networking.INetworkEventHandler.ReceiveEvent(INetClient client, NetworkEvent netEvent, BSONValue bsonValue)
   at Eco.Plugins.Networking.Client.<.ctor>b__86_4() System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
 ---> System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
 ---> System.NullReferenceException: Object reference not set to an instance of an object.
   at Eco.Gameplay.Items.BlockItem.Drop(Player player, InteractionTriggerInfo triggerInfo, InteractionTarget target)
   at InvokeStub_BlockItem.Drop(Object, Span`1)
   at System.Reflection.MethodBaseInvoker.InvokeWithFewArgs(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   --- End of inner exception stack trace ---
   at System.Reflection.MethodBaseInvoker.InvokeWithFewArgs(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at Eco.Core.Controller.ControllerManager.HandleViewRPC(INetClient client, Int32 universalID, String methodIdOrName, BSONObject bson)
   at InvokeStub_Client.ViewRPC(Object, Span`1)
   at System.Reflection.MethodBaseInvoker.InvokeWithFewArgs(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   --- End of inner exception stack trace ---
   at System.Reflection.MethodBaseInvoker.InvokeWithFewArgs(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at Eco.Shared.Networking.RPCManager.InvokeOn(INetClient client, BSONObject bson, Object target, String methodName)
   at Eco.Shared.Networking.RPCManager.HandleReceiveRPC(INetClient client, BSONObject bson)
   at Eco.Plugins.Networking.NetworkServer.Eco.Shared.Networking.INetworkEventHandler.ReceiveEvent(INetClient client, NetworkEvent netEvent, BSONValue bsonValue)
   at Eco.Plugins.Networking.Client.<.ctor>b__86_4()

i'm not sure if it's linked, but we have a player that has a bug with it's drop system, watch screenshot:

He has some WoodenHullPlanks inside it's drop zone
it block him from dropping anything else
he can't move them back
nothing change with server or client restart

we will try a /dumpall on him tomorrow to see if it fixes it. We don't know how he did that. It might be linked to the stack trace or not.

[padmanek]

https://discordapp.com/channels/254025510651297802/312991502697627658/1343640276052349030

they have an internal ticket for it already: https://discordapp.com/channels/254025510651297802/312991502697627658/1343681066988474419

[Thibault-Brocheton]

(my markdown was bugued, I reported an other issue with the drop zone showing some items, probably not linked to the stack trace then)

[Thibault-Brocheton]

note: we didn't have a chance to test the dumpall, the player didn't reconnect