Critical JavaScript syntax error in Visual Studio 2013 SharePoint 2013 solution

I opened a SharePoint 2013 solution whose source code I got from our Team Foundation Server. I changed the site URL to a site collection local to my virtual machine, and I began debugging the program.  Before a page was rendered, I twice received the error: JavaScript critical error in ...Pages/default.aspx SCRIPT:1002 Syntax Error.   The Visual Studio 2013 error gives the option to Stop Debugging or Continue, and the solution is deployed and activated after repeatedly hitting Continue.  I've researched the error, but I still don't understand the problem, especially since default.aspx is not part of the solution.