René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"NullReferenceException in ExpressionEvaluator.EvaluateWorker","articleBody":"From https://github.com/Microsoft/vscode-python/issues/2297\r\n```\r\n[Error - 07:34:56] System.NullReferenceException: Object reference not set to an instance of an object.\r\n   at System.Object.GetType()\r\n   at Microsoft.PythonTools.Analysis.Analyzer.ExpressionEvaluator.EvaluateWorker(Node node)\r\n   at Microsoft.PythonTools.Analysis.Analyzer.DDG.Walk(ClassDefinition node)\r\n   at Microsoft.PythonTools.Parsing.Ast.ClassDefinition.Walk(PythonWalker walker)\r\n   at Microsoft.PythonTools.Analysis.Analyzer.DDG.Walk(SuiteStatement node)\r\n   at Microsoft.PythonTools.Parsing.Ast.SuiteStatement.Walk(PythonWalker walker)\r\n   at Microsoft.PythonTools.Analysis.Analyzer.DDG.WalkBody(Node node, AnalysisUnit unit)\r\n   at Microsoft.PythonTools.Analysis.ClassAnalysisUnit.AnalyzeWorker(DDG ddg, CancellationToken cancel)\r\n   at Microsoft.PythonTools.Analysis.Analyzer.DDG.Analyze(Deque`1 queue, CancellationToken cancel, Action`1 reportQueueSize, Int32 reportQueueInterval)\r\n   at Microsoft.PythonTools.Analysis.PythonAnalyzer.AnalyzeQueuedEntries(CancellationToken cancel)\r\n   at Microsoft.PythonTools.Intellisense.AnalysisQueue.GroupAnalysis.Analyze(CancellationToken cancel)\r\n   at Microsoft.PythonTools.Intellisense.AnalysisQueue.Worker(Object threadStarted)\r\n```","author":{"url":"https://github.com/MikhailArkhipov","@type":"Person","name":"MikhailArkhipov"},"datePublished":"2018-09-12T18:51:11.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/87/python-language-server/issues/87"}