Crush

[AlgorithmicMind]

Running on 64 bit Windows with 8 GB RAM
Version: 1.8.6 Survival Mode Edition (Stable)12/2/2019 8:14:11 μμ: Critical error occurred
System.NullReferenceException: Object reference not set to an instance of an object.
   at Vintagestory.GameContent.Mechanics.BlockWindmillRotor.TryPlaceBlock(IWorldAccessor world, IPlayer byPlayer, ItemStack itemstack, BlockSelection blockSel)
   at _K2fmDt3LahlWXEj6Esz0AJJFmNp._FVV6TLtFbL51ACDFj5fSg5drO1p(BlockSelection )
   at _nMC4aA7Wi7OBKYjJRNpjyldeJPo._aXOXqkHIjpp5ro9V62UjmrBECge(BlockSelection , Block )
   at _nMC4aA7Wi7OBKYjJRNpjyldeJPo._D2eWbXUCqpvRfMA7ElF8olZuSHe(Single )
   at _nMC4aA7Wi7OBKYjJRNpjyldeJPo._yCfXhLj9ADMgaHRvlwn75lUVfie(Single )
   at _MrklTihOKPbcVZ346gJmH39UZUH._Yk7Dv1H1VJNpa6qcgjCMd4B8fLNA(EnumRenderStage , Single )
   at _K2fmDt3LahlWXEj6Esz0AJJFmNp._Yk7Dv1H1VJNpa6qcgjCMd4B8fLNA(EnumRenderStage , Single )
   at _K2fmDt3LahlWXEj6Esz0AJJFmNp._xUgShaj3EGJw6bxByvAjBAOsrTm(Single )
   at _JA2o2qCdbxRRuKLcj0ed5GERaOW._xUgShaj3EGJw6bxByvAjBAOsrTm(Single )
   at _XbwW92DfPLMirecI3G0ZC0SbIlI._bM3q3B2uYU871QxTRlooiqKeKCh(Single )
   at _XbwW92DfPLMirecI3G0ZC0SbIlI._gELHdT9iJuSCK3WN5DcuoAMhk1R(Single )
   at _wshbe4W5vWkCJQpgFYaAfJQGYfjb._8fyrbxfxgthLgctCPbPxZBeE7lC(Object , FrameEventArgs )
   at System.EventHandler`1.Invoke(Object sender, TEventArgs e)
   at OpenTK.GameWindow.RaiseRenderFrame(Double elapsed, Double& timestamp)
   at OpenTK.GameWindow.DispatchRenderFrame()
   at OpenTK.GameWindow.Run(Double updates_per_second, Double frames_per_second)
   at _7RbFPYmEauEtblHF8XhRgqgNTbT._Bq6cNCFb7UUjYLmEki8Fg1xITYu(_cP5Vo8cijahhBKUlfh9aHwWB989 , String[] )
   at _E1oVgwngz1oPDa0IuTZ50QFzLQd._Bq6cNCFb7UUjYLmEki8Fg1xITYu(ThreadStart )
-------------------------------

Event Log, last 3 entries
==================================
{ TimeGenerated = 10/10/2018 3:26:47 πμ, Site = , Source = .NET Runtime, Message = Application: Vintagestory.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.AccessViolationException
   at OpenTK.Graphics.OpenGL.GL.DeleteBuffer(Int32)
   at _uhPMYwuZV1y63gksIvayg8lpdaG._rX7xi8Gt18tFqvq6ErlyAMhzqRC()
   at Vintagestory.GameContent.WeatherSystem.<StartClientSide>b__20_0()
   at Vintagestory.API.Common.Action.Invoke()
   at _foI2hCxGcDzKqqjfeABpB6CpNBLA._AiShxbfULtErDuFzDa8i0RqObKC(Boolean)
   at _PbV8dOmd2gPDngjzYiRbb06dUqO._9RKodfsMCWrcpJPVYtzpRJIB5Zv()
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
   at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
   at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
   at System.Threading.ThreadHelper.ThreadStart()

 }
{ TimeGenerated = 2/10/2018 8:18:34 μμ, Site = , Source = .NET Runtime, Message = Application: Vintagestory.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.AccessViolationException
   at OpenTK.Graphics.OpenGL.GL.DeleteBuffer(Int32)
   at _EEwwVLTFpNy8ejWA0ErCrTMFZ2n._SZg1M6dwxu6O7H1Fd2PwFXCBnwK(Vintagestory.API.Client.MeshRef)
   at Vintagestory.GameContent.WeatherSystem.<StartClientSide>b__20_0()
   at Vintagestory.API.Common.Action.Invoke()
   at _x6txsUH2ZmvxikF8rpAfSVVdSAD._I6mlcuRErbQJp9mLqlj4EKGI4Gl(Boolean)
   at _Dk6p5IENbKR5Z01gdPDIZUDlywi._SKrswt76yikkCPwK5GneIovltIh()
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
   at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
   at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
   at System.Threading.ThreadHelper.ThreadStart()

 }

It happened when i tried to place a wooden rotor on a wooden axel.

Note: Either i do it vertical or horizontally it is the same crush.

#Gamemode: creative  Gamespeed: Normal#

[Tyron]

Thanks for the report, i've now fixed some crashes related to the windmill rotor. Please be aware though that these blocks are part of the unfinished mechanical power network.