[SDK Package] Visual Studio Hang with Language Service Sample Code

Hi,

I followed the code here (https://msdn.microsoft.com/en-us/library/bb165662.aspx) and here (https://msdn.microsoft.com/en-us/library/bb166498.aspx). When I run Visual Studio and open a text file with my language file extension, Visual Studio hangs. If I make the GetLanguagePreferences and GetScanner of the language service to return null, it doesn't hang. Why is this so?

Visual Studio 2013

Windows 8.1 64 bit