Crash System.NullReferenceException for OpenRA.Actor.get_CenterPosition

[Muh-Muh]

I think this is a different Issue than #31 but might be related(?)
Exception log:

OpenRA engine version playtest-20190106
Dark Reign mod version playtest-20190206
on map dfcded52913e5433fc3415962359a2255f75d778 (D-Missions: F. Guard 01 by DMW).
Date: 2019-02-08 00:31:04Z
Operating System: Linux (Unix 4.20.5.200)
Runtime Version: Mono 4.8.0 (Stable 4.8.0.520/8f6d0f6 Wed Sep 20 21:27:10 UTC 2017) CLR 4.0.30319.42000
Exception of type `System.NullReferenceException`: Object reference not set to an instance of an object
  at OpenRA.Actor.get_CenterPosition () [0x00007] in <e048e680f3a847fbb277180ecfcbc567>:0 
  at OpenRA.Graphics.Viewport.<Center>m__0 (OpenRA.Actor a) [0x00000] in <e048e680f3a847fbb277180ecfcbc567>:0 
  at (wrapper delegate-invoke) System.Func`2[OpenRA.Actor,OpenRA.WPos]:invoke_TResult_T (OpenRA.Actor)
  at System.Linq.Enumerable+WhereSelectEnumerableIterator`2[TSource,TResult].MoveNext () [0x00064] in /builddir/build/BUILD/mono-4.8.0/mcs/class/referencesource/System.Core/System/Linq/Enumerable.cs:285 
  at System.Linq.Enumerable.Count[TSource] (System.Collections.Generic.IEnumerable`1[T] source) [0x0004b] in /builddir/build/BUILD/mono-4.8.0/mcs/class/referencesource/System.Core/System/Linq/Enumerable.cs:1226 
  at OpenRA.IEnumerableExtensions.Average (System.Collections.Generic.IEnumerable`1[T] source) [0x00001] in <e048e680f3a847fbb277180ecfcbc567>:0 
  at OpenRA.Graphics.Viewport.Center (System.Collections.Generic.IEnumerable`1[T] actors) [0x00035] in <e048e680f3a847fbb277180ecfcbc567>:0 
  at OpenRA.Mods.Common.Widgets.Logic.Ingame.CycleProductionActorsHotkeyLogic.OnHotkeyActivated (OpenRA.KeyInput e) [0x00108] in /home/travis/build/drogoganor/DarkReign/engine/OpenRA.Mods.Common/Widgets/Logic/Ingame/Hotkeys/CycleProductionActorsHotkeyLogic.cs:67 
  at OpenRA.Mods.Common.Widgets.Logic.SingleHotkeyBaseLogic+<SingleHotkeyBaseLogic>c__AnonStorey0.<>m__0 (OpenRA.KeyInput e) [0x00025] in /home/travis/build/drogoganor/DarkReign/engine/OpenRA.Mods.Common/Widgets/Logic/SingleHotkeyBaseLogic.cs:32 
  at OpenRA.Mods.Common.Widgets.LogicKeyListenerWidget.HandleKeyPress (OpenRA.KeyInput e) [0x0001d] in /home/travis/build/drogoganor/DarkReign/engine/OpenRA.Mods.Common/Widgets/LogicKeyListenerWidget.cs:25 
  at OpenRA.Widgets.Widget.HandleKeyPressOuter (OpenRA.KeyInput e) [0x0006b] in <e048e680f3a847fbb277180ecfcbc567>:0 
  at OpenRA.Widgets.Widget.HandleKeyPressOuter (OpenRA.KeyInput e) [0x0003b] in <e048e680f3a847fbb277180ecfcbc567>:0 
  at OpenRA.Widgets.Widget.HandleKeyPressOuter (OpenRA.KeyInput e) [0x0003b] in <e048e680f3a847fbb277180ecfcbc567>:0 
  at OpenRA.Widgets.Ui.HandleKeyPress (OpenRA.KeyInput e) [0x0001c] in <e048e680f3a847fbb277180ecfcbc567>:0 
  at OpenRA.DefaultInputHandler+<OnKeyInput>c__AnonStorey0.<>m__0 () [0x00000] in <e048e680f3a847fbb277180ecfcbc567>:0 
  at OpenRA.Sync.RunUnsynced[T] (System.Boolean checkSyncHash, OpenRA.World world, System.Func`1[TResult] fn) [0x00033] in <e048e680f3a847fbb277180ecfcbc567>:0 
  at OpenRA.DefaultInputHandler.OnKeyInput (OpenRA.KeyInput input) [0x0000e] in <e048e680f3a847fbb277180ecfcbc567>:0 
  at OpenRA.Platforms.Default.Sdl2Input.PumpInput (OpenRA.Platforms.Default.Sdl2PlatformWindow device, OpenRA.IInputHandler inputHandler) [0x003b9] in <c655ac44daf046df86ec917481879627>:0 
  at OpenRA.Platforms.Default.Sdl2PlatformWindow.PumpInput (OpenRA.IInputHandler inputHandler) [0x00007] in <c655ac44daf046df86ec917481879627>:0 
  at OpenRA.Renderer.EndFrame (OpenRA.IInputHandler inputHandler) [0x0000d] in <e048e680f3a847fbb277180ecfcbc567>:0 
  at OpenRA.Game.RenderTick () [0x00142] in <e048e680f3a847fbb277180ecfcbc567>:0 
  at OpenRA.Game.Loop () [0x00142] in <e048e680f3a847fbb277180ecfcbc567>:0 
  at OpenRA.Game.Run () [0x00042] in <e048e680f3a847fbb277180ecfcbc567>:0 
  at OpenRA.Game.InitializeAndRun (System.String[] args) [0x00011] in <e048e680f3a847fbb277180ecfcbc567>:0 
  at OpenRA.Program.Main (System.String[] args) [0x0004f] in <e048e680f3a847fbb277180ecfcbc567>:0 

[drogoganor]

Beauty, thanks. Looks like there's a problem with the hotkeys. I'll have a look this weekend.

[drogoganor]

Reproduced by pressing Tab!

[drogoganor]

This one is solved now.