René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"NullReferenceException in ModuleResolver.GetModuleFullName","articleBody":"## Environment data\r\n- VS Code version: 1.27.1 \u0026 1.28.0-insider (clean installs)\r\n- Extension version (available under the Extensions sidebar): 2018.8.0\r\n- OS and version: Windows 10 Pro Version 10.0.17134.228\r\n- Python version (\u0026 distribution if applicable, e.g. Anaconda): Python 3.7 64-bit (clean install)\r\n- Type of virtual environment used (N/A | venv | virtualenv | conda | ...): NA\r\n- Relevant/affected Python packages and their versions: None\r\n\r\n## Actual behavior\r\nOutput for `Python` in the `Output` panel opens with a \"System.NullReferenceException\" error after typing \"from .\" in an \"\\_\\_init\\_\\_.py\" file.\r\n\r\n## Expected  behavior\r\nNo error\r\n\r\n## Steps to reproduce:\r\n1. Create an empty folder\r\n2. Open the folder with vscode or vscode-insider\r\n3. Create a new file \"\\_\\_init\\_\\_.py\"\r\n4. Start typing \"from .\"\r\n\r\nThe error occurs after typing the dot. The error does not occur with other file names (e.g. \"some\\_file.py\"). I cannot tell if this is related to a closed issue with a similar error. \r\n\r\nScreenshots at the bottom.\r\n\r\n## Logs\r\nOutput for `Python` in the `Output` panel:\r\n[Error - 8:33:17 AM] System.NullReferenceException: Object reference not set to an instance of an object.\r\n   at Microsoft.PythonTools.Analysis.ModuleResolver.GetModuleFullName(String originatingModule, String relativePath)\r\n   at Microsoft.PythonTools.Analysis.ModuleResolver.ResolvePotentialModuleNames(String importingFromModuleName, String importingFromFilePath, String relativeModuleName, Boolean absoluteImports)+MoveNext()\r\n   at System.Collections.Generic.LargeArrayBuilder`1.AddRange(IEnumerable`1 items)\r\n   at System.Collections.Generic.EnumerableHelpers.ToArray[T](IEnumerable`1 source)\r\n   at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)\r\n   at Microsoft.PythonTools.Analysis.Analyzer.DDG.TryImportModule(String modName, Boolean forceAbsolute, ModuleReference\u0026 moduleRef, IReadOnlyList`1\u0026 remainingParts)\r\n   at Microsoft.PythonTools.Analysis.Analyzer.DDG.Walk(FromImportStatement node)\r\n   at Microsoft.PythonTools.Parsing.Ast.FromImportStatement.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.Parsing.Ast.PythonAst.Walk(PythonWalker walker)\r\n   at Microsoft.PythonTools.Analysis.AnalysisUnit.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.HandleAnalyzable(IAnalyzable item, AnalysisPriority priority, CancellationToken cancellationToken)\r\n   at Microsoft.PythonTools.Intellisense.AnalysisQueue.ConsumerLoop()\r\n\r\nOutput from `Console` under the `Developer Tools` panel:\r\nNone\r\n\r\n## Screenshots\r\nvscode\r\n![vscode_dot_test_ss](https://user-images.githubusercontent.com/11785668/45220112-1f42e780-b27b-11e8-90a9-f4384b550cf9.png)\r\n\r\nvscode-insider\r\n![vscode_insider_dot_test_ss](https://user-images.githubusercontent.com/11785668/45220115-22d66e80-b27b-11e8-8ae4-385aad2b8322.png)\r\n\r\n\r\n","author":{"url":"https://github.com/MikhailArkhipov","@type":"Person","name":"MikhailArkhipov"},"datePublished":"2018-09-07T19:41:29.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/72/python-language-server/issues/72"}