René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"NullReferenceException in OverloadResultComparer.Equals","articleBody":"There seems to be a recent regression in the commit c067e83a (does not appear to be directly caused by it though), that throws a `NullReferenceException` in\r\n\r\n```\r\n   at Microsoft.PythonTools.Analysis.BuiltinFunctionOverloadResult.get_Documentation()\r\n   at Microsoft.PythonTools.Analysis.OverloadResultComparer.Equals(OverloadResult x, OverloadResult y)\r\n   at Microsoft.PythonTools.Analysis.OverloadResult.Equals(Object obj)\r\n   at System.Collections.Generic.ObjectEqualityComparer`1.Equals(T x, T y)\r\n   at System.Collections.Generic.HashSet`1.Contains(T item)\r\n   at System.Collections.Generic.HashSet`1.ContainsAllElements(IEnumerable`1 other)\r\n   at Microsoft.PythonTools.Analysis.Infrastructure.EnumerableExtensions.SetEquals[T](IEnumerable`1 source, IEnumerable`1 other, IEqualityComparer`1 comparer)\r\n   at Microsoft.PythonTools.Analysis.Values.BuiltinFunctionInfo.Equals(Object obj)\r\n   at Microsoft.PythonTools.Analysis.ObjectComparer.Equals(AnalysisValue x, AnalysisValue y)\r\n   at Microsoft.PythonTools.Analysis.AnalysisValue.Microsoft.PythonTools.Analysis.IAnalysisSet.Add(AnalysisValue item, Boolean\u0026 wasChanged, Boolean canMutate)\r\n   at Microsoft.PythonTools.Analysis.Analyzer.TypedDependencyInfo.AddType(AnalysisValue ns)\r\n   at Microsoft.PythonTools.Analysis.TypedDef`1.AddTypes(IVersioned projectEntry, IAnalysisSet newTypes, Boolean enqueue, IProjectEntry declaringScope)\r\n   at Microsoft.PythonTools.Analysis.TypedDef`1.AddTypes(AnalysisUnit unit, IAnalysisSet newTypes, Boolean enqueue, IProjectEntry declaringScope)\r\n   at Microsoft.PythonTools.Analysis.Analyzer.DDG.AssignImportedModuleOrMember(String name, IAnalysisSet value, Boolean addRef, Node node, NameExpression nameReference)\r\n   at Microsoft.PythonTools.Analysis.Analyzer.DDG.FinishImportModuleOrMember(ModuleReference module, IReadOnlyList`1 attribute, String name, Boolean addRef, Node node, NameExpression nameReference)\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.AnalysisUnit.Analyze(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```\r\n\r\nI can not stably reproduce this issue, because I parse and queue modules in random order.","author":{"url":"https://github.com/lostmsu","@type":"Person","name":"lostmsu"},"datePublished":"2018-10-19T05:23:50.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/286/python-language-server/issues/286"}