umbraco/Umbraco-CMS — pull request #10 by jdtbltilg (2013-06-15 19:43:19+00:00)
Title: Resolve U4-2379 InvalidOperationException: Sequence contains no elements...

... in ApplicationTreeRegistrar

http://issues.umbraco.org/issue/U4-2379

issue stems from a package that inherits baseTree however does not add the TreeAttribrute to the class declaration.