Renderer crash, ResourceManagement - RefCounting problem

[haraldsteinlechner]

the problem unveils as following:

3: ERROR
 3:   [Client] 1: rendering faulted with System.Exception: [Resource] cannot update unreferenced resource
 3:      at Microsoft.FSharp.Core.PrintfModule.PrintFormatToStringThenFail@1647.Invoke(String message)
 3:      at Aardvark.Base.Rendering.Resource`2.PerformUpdate(AdaptiveToken token, RenderToken t)
 3:      at <StartupCode$Aardvark-Base-Rendering>.$ResourceManagement.arg10@246-3[h,v](Resource`2 x, RenderToken rt, AdaptiveToken token)
 3:      at Aardvark.Base.Rendering.Resource`2.Update(AdaptiveToken token, RenderToken rt)
 3:      at Aardvark.Base.Rendering.Resource`2.Aardvark.Base.Rendering.IResource.Update(AdaptiveToken token, RenderToken rt)
 3:      at <StartupCode$Aardvark-Base-Rendering>.$ResourceManagement.run@599-1(ResourceInputSet this, Int32 level, AdaptiveToken token, RenderToken rt)
 3:      at <StartupCode$Aardvark-Base-Rendering>.$ResourceManagement.arg10@660-4(ResourceInputSet x, RenderToken rt, AdaptiveToken token)
 3:      at Aardvark.Base.Rendering.ResourceInputSet.Update(AdaptiveToken token, RenderToken rt)
 3:      at Aardvark.Rendering.GL.RenderTasks.RenderTask.UpdateResources(AdaptiveToken token, RenderToken t)
 3:      at Aardvark.Rendering.GL.RenderTasks.AbstractOpenGlRenderTask.Perform(AdaptiveToken token, RenderToken t, OutputDescription desc)