Closing project and saving dirty editor results in ResourceException

With Preview Data option enabled....

1) With open dirty editor (requires save)
2) Close it's project
3) Requires Save Dialog is presented, choose OK
4) Error stack trace below...

org.eclipse.core.internal.resources.ResourceException: Resource '/SimpleDatatypesTest' is not open.
at org.eclipse.core.internal.resources.Project.checkAccessible(Project.java:137)
at org.eclipse.core.internal.resources.File.create(File.java:123)
at org.eclipse.core.internal.resources.File.create(File.java:196)
at org.teiid.designer.runtime.preview.jobs.CreatePreviewVdbJob.runImpl(CreatePreviewVdbJob.java:126)
at org.teiid.designer.runtime.preview.jobs.WorkspacePreviewVdbJob.runInWorkspace(WorkspacePreviewVdbJob.java:126)
at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)

Guessing the close project thread is completing before the CreatePreviewVdbJob gets to check it's project status.