Error when rendering a document after rendering one with a <layout> element

[Jo Vermeulen]

When rendering a UIML document with a layout tag with the SWF vocabulary, and rendering an other SWF document after it (using the same uiml.net instance), the renderer chokes:

System.NullReferenceException: Object reference not set to an instance of an object
  at Uiml.LayoutManagement.LayoutPropertyRepository.AddPropertiesToParts (Uiml.UimlDocument doc) [0x00000]
  at Uiml.LayoutManagement.LayoutPropertyRepository.InitializeProperties (Uiml.UimlDocument doc, IRenderer r) [0x00000]
  at Uiml.UimlDocument.SolveLayoutProperties (IRenderer r) [0x00000]
  at Uiml.Rendering.SWF.SWFRenderer.Render (Uiml.UimlDocument uimlDoc) [0x00000]
  at Uiml.FrontEnd.UimlFrontEnd.Render () [0x00000]
  at Uiml.LayoutManagement.LayoutPropertyRepository.AddPropertiesToParts (Uiml.UimlDocument doc) [0x00000]
  at Uiml.LayoutManagement.LayoutPropertyRepository.InitializeProperties (Uiml.UimlDocument doc, IRenderer r) [0x00000]
  at Uiml.UimlDocument.SolveLayoutProperties (IRenderer r) [0x00000]
  at Uiml.Rendering.SWF.SWFRenderer.Render (Uiml.UimlDocument uimlDoc) [0x00000]
  at Uiml.FrontEnd.UimlFrontEnd.Render () [0x00000]
Could not create GUI for /home/jo/Projects/Uiml.net/examples/swf/swfBlog.uiml with uiml.net

Steps to reproduce:

1. Open the Uiml.net renderer (without commandline arguments)
2. Select an SWF layout example
3. Render it
4. Close the rendered interface
5. Select another SWF example
6. Render it

Expected behavior:

The document should be cleanly rendered

Actual behavior:

The renderer stops on a NullReferenceException

[Jo Vermeulen (jozilla)]

This bug is due to the LayoutPropertyRepository singleton class not being cleared after rendering. Further investigation is needed.

[Wim Leers (wimleers)]

This bug bit me too. I was going to report the same steps to reproduce.