"Hash code changed when merging AnalysisValues" while analyzing scikit-learn

[jakebailey]

I get this Debug.Fail while attached to PLS when it's analyzing scikit-learn. The key seems to be changing:

key: {tuple[?, ?]tuple[str, list[float], list[float], ...][list, None, tuple, ]}
newKey: {tuple[[MockDataFrame, bytes, str, list, tuple, list...][float, list[str, str], None, tuple, ]tuple[str, list[float], list[float]...}

Copy/paste from the Call Stack pane:

>	System.Private.CoreLib.dll!System.Diagnostics.Debug.Assert(bool condition, string message, string detailMessage) Line 107	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.AnalysisSetDetails.AnalysisHashSet.AddOne(ref Microsoft.PythonTools.Analysis.AnalysisSetDetails.AnalysisHashSet.BucketSet buckets, Microsoft.PythonTools.Analysis.AnalysisValue key, int hc, System.Collections.Generic.IEqualityComparer<Microsoft.PythonTools.Analysis.AnalysisValue> comparer) Line 425	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.AnalysisSetDetails.AnalysisHashSet.AddOne(ref Microsoft.PythonTools.Analysis.AnalysisSetDetails.AnalysisHashSet.BucketSet buckets, Microsoft.PythonTools.Analysis.AnalysisValue key, System.Collections.Generic.IEqualityComparer<Microsoft.PythonTools.Analysis.AnalysisValue> comparer) Line 329	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.AnalysisSetDetails.AnalysisHashSet.AddOne(Microsoft.PythonTools.Analysis.AnalysisValue key) Line 318	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.AnalysisSetDetails.AnalysisHashSet.Add(Microsoft.PythonTools.Analysis.AnalysisValue item, out bool wasChanged, bool canMutate) Line 161	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.AnalysisSetDetails.AnalysisHashSet.Add(Microsoft.PythonTools.Analysis.AnalysisValue item, out bool wasChanged, bool canMutate) Line 156	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.Analyzer.TypedDependencyInfo.AddType(Microsoft.PythonTools.Analysis.AnalysisValue ns) Line 117	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.TypedDef<Microsoft.PythonTools.Analysis.Analyzer.ReferenceableDependencyInfo>.AddTypes(Microsoft.PythonTools.Analysis.IVersioned projectEntry, Microsoft.PythonTools.Analysis.IAnalysisSet newTypes, bool enqueue, Microsoft.PythonTools.Analysis.IProjectEntry declaringScope) Line 261	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.Analyzer.FunctionScope.UpdateParameters(Microsoft.PythonTools.Analysis.Analyzer.FunctionAnalysisUnit unit, Microsoft.PythonTools.Analysis.Values.ArgumentSet others, bool enqueue, Microsoft.PythonTools.Analysis.Analyzer.FunctionScope scopeWithDefaultParameters, bool usePlaceholders) Line 199	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.Analyzer.FunctionAnalysisUnit.UpdateParameters(Microsoft.PythonTools.Analysis.Values.ArgumentSet callArgs, bool enqueue) Line 63	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.Values.FunctionInfo.DoCall(Microsoft.PythonTools.Parsing.Ast.Node node, Microsoft.PythonTools.Analysis.AnalysisUnit callingUnit, Microsoft.PythonTools.Analysis.Analyzer.FunctionAnalysisUnit calledUnit, Microsoft.PythonTools.Analysis.Values.ArgumentSet callArgs) Line 156	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.Values.FunctionInfo.Call(Microsoft.PythonTools.Parsing.Ast.Node node, Microsoft.PythonTools.Analysis.AnalysisUnit unit, Microsoft.PythonTools.Analysis.IAnalysisSet[] args, Microsoft.PythonTools.Parsing.Ast.NameExpression[] keywordArgNames) Line 98	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.Analyzer.ExpressionEvaluator.EvaluateCall(Microsoft.PythonTools.Analysis.Analyzer.ExpressionEvaluator ee, Microsoft.PythonTools.Parsing.Ast.Node node) Line 378	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.Analyzer.ExpressionEvaluator.EvaluateWorker(Microsoft.PythonTools.Parsing.Ast.Node node) Line 211	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.Analyzer.ExpressionEvaluator.Evaluate(Microsoft.PythonTools.Parsing.Ast.Expression node) Line 55	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.Analyzer.DDG.Walk(Microsoft.PythonTools.Parsing.Ast.AssignmentStatement node) Line 137	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Parsing.Ast.AssignmentStatement.Walk(Microsoft.PythonTools.Parsing.Ast.PythonWalker walker) Line 41	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.Analyzer.DDG.Walk(Microsoft.PythonTools.Parsing.Ast.SuiteStatement node) Line 665	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Parsing.Ast.SuiteStatement.Walk(Microsoft.PythonTools.Parsing.Ast.PythonWalker walker) Line 34	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.Analyzer.DDG.Walk(Microsoft.PythonTools.Parsing.Ast.IfStatement node) Line 522	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Parsing.Ast.IfStatement.Walk(Microsoft.PythonTools.Parsing.Ast.PythonWalker walker) Line 45	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.Analyzer.DDG.Walk(Microsoft.PythonTools.Parsing.Ast.SuiteStatement node) Line 665	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Parsing.Ast.SuiteStatement.Walk(Microsoft.PythonTools.Parsing.Ast.PythonWalker walker) Line 34	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.Analyzer.FunctionAnalysisUnit.AnalyzeWorker(Microsoft.PythonTools.Analysis.Analyzer.DDG ddg, System.Threading.CancellationToken cancel) Line 88	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.AnalysisUnit.Analyze(Microsoft.PythonTools.Analysis.Analyzer.DDG ddg, System.Threading.CancellationToken cancel) Line 139	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.Analyzer.DDG.Analyze(Microsoft.PythonTools.Analysis.Deque<Microsoft.PythonTools.Analysis.AnalysisUnit> queue, System.Threading.CancellationToken cancel, System.Action<int> reportQueueSize, int reportQueueInterval) Line 75	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.PythonAnalyzer.AnalyzeQueuedEntries(System.Threading.CancellationToken cancel) Line 907	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Intellisense.AnalysisQueue.GroupAnalysis.Analyze(System.Threading.CancellationToken cancel) Line 229	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Intellisense.AnalysisQueue.HandleAnalyzable(Microsoft.PythonTools.Analysis.IAnalyzable item, Microsoft.PythonTools.Intellisense.AnalysisPriority priority, System.Threading.CancellationToken cancellationToken) Line 152	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Intellisense.AnalysisQueue.Enqueue.AnonymousMethod__0(System.Threading.CancellationToken ct) Line 136	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Intellisense.AnalysisQueue.ConsumerLoop() Line 64	C#
 	[Resuming Async Method]	
 	System.Private.CoreLib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state) Line 167	C#
 	System.Private.CoreLib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder<System.Threading.Tasks.VoidTaskResult>.AsyncStateMachineBox<Microsoft.PythonTools.Intellisense.AnalysisQueue.<ConsumerLoop>d__25>.MoveNext() Line 559	C#
 	System.Private.CoreLib.dll!System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Runtime.CompilerServices.IAsyncStateMachineBox box, bool allowInlining) Line 798	C#
 	System.Private.CoreLib.dll!System.Threading.Tasks.Task.RunContinuations(object continuationObject) Line 3276	C#
 	System.Private.CoreLib.dll!System.Threading.Tasks.Task<Microsoft.PythonTools.Intellisense.AnalysisQueue.QueueItem>.TrySetResult(Microsoft.PythonTools.Intellisense.AnalysisQueue.QueueItem result) Line 421	C#
 	System.Private.CoreLib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder<Microsoft.PythonTools.Intellisense.AnalysisQueue.QueueItem>.SetExistingTaskResult(Microsoft.PythonTools.Intellisense.AnalysisQueue.QueueItem result) Line 639	C#
 	System.Private.CoreLib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder<Microsoft.PythonTools.Intellisense.AnalysisQueue.QueueItem>.SetResult(Microsoft.PythonTools.Intellisense.AnalysisQueue.QueueItem result) Line 629	C#
 	Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Intellisense.AnalysisQueue.ConsumeAsync() Line 89	C#
 	[Resuming Async Method]	
 	System.Private.CoreLib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state) Line 167	C#
 	System.Private.CoreLib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder<Microsoft.PythonTools.Intellisense.AnalysisQueue.QueueItem>.AsyncStateMachineBox<Microsoft.PythonTools.Intellisense.AnalysisQueue.<ConsumeAsync>d__26>.MoveNext() Line 559	C#
 	System.Private.CoreLib.dll!System.Threading.ThreadPoolWorkQueue.Dispatch() Line 588	C#

[lostmsu]

I also started getting it on a different source base.

Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.AnalysisSetDetails.AnalysisHashSet.AddOne(ref Microsoft.PythonTools.Analysis.AnalysisSetDetails.AnalysisHashSet.BucketSet buckets, Microsoft.PythonTools.Analysis.AnalysisValue key, int hc, System.Collections.Generic.IEqualityComparer<Microsoft.PythonTools.Analysis.AnalysisValue> comparer) Line 425	C#
Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.AnalysisSetDetails.AnalysisHashSet.AddOne(ref Microsoft.PythonTools.Analysis.AnalysisSetDetails.AnalysisHashSet.BucketSet buckets, Microsoft.PythonTools.Analysis.AnalysisValue key, System.Collections.Generic.IEqualityComparer<Microsoft.PythonTools.Analysis.AnalysisValue> comparer) Line 329	C#
Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.AnalysisSetDetails.AnalysisHashSet.AddFromEnumerator(ref Microsoft.PythonTools.Analysis.AnalysisSetDetails.AnalysisHashSet.BucketSet buckets, System.Collections.Generic.IEnumerator<Microsoft.PythonTools.Analysis.AnalysisValue> items, System.Collections.Generic.IEqualityComparer<Microsoft.PythonTools.Analysis.AnalysisValue> comparer) Line 240	C#
Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.AnalysisSetDetails.AnalysisHashSet.AddFromEnumerator(System.Collections.Generic.IEnumerator<Microsoft.PythonTools.Analysis.AnalysisValue> items) Line 232	C#
Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.AnalysisSetDetails.AnalysisHashSet.AnalysisHashSet(System.Collections.Generic.IEnumerable<Microsoft.PythonTools.Analysis.AnalysisValue> enumerable, System.Collections.Generic.IEqualityComparer<Microsoft.PythonTools.Analysis.AnalysisValue> comparer) Line 85	C#
Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.AnalysisSet.AsUnion(Microsoft.PythonTools.Analysis.IAnalysisSet set, Microsoft.PythonTools.Analysis.UnionComparer comparer, out bool wasChanged) Line 288	C#
Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.AnalysisSet.AsUnion(Microsoft.PythonTools.Analysis.IAnalysisSet set, int strength, out bool wasChanged) Line 247	C#
Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.Analyzer.TypedDependencyInfo.MakeUnion(int strength) Line 130	C#
Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.TypedDef<Microsoft.PythonTools.Analysis.Analyzer.ReferenceableDependencyInfo>.MakeUnion(int strength) Line 415	C#
Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.TypedDef<Microsoft.PythonTools.Analysis.Analyzer.ReferenceableDependencyInfo>.MakeUnionStronger() Line 406	C#
Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.TypedDef<Microsoft.PythonTools.Analysis.Analyzer.ReferenceableDependencyInfo>.MakeUnionStrongerIfMoreThan(int typeCount, Microsoft.PythonTools.Analysis.IAnalysisSet extraTypes) Line 398	C#
Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.Analyzer.FunctionScope.UpdateParameters(Microsoft.PythonTools.Analysis.Analyzer.FunctionAnalysisUnit unit, Microsoft.PythonTools.Analysis.Values.ArgumentSet others, bool enqueue, Microsoft.PythonTools.Analysis.Analyzer.FunctionScope scopeWithDefaultParameters, bool usePlaceholders) Line 198	C#
Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.Analyzer.FunctionAnalysisUnit.UpdateParameters(Microsoft.PythonTools.Analysis.Values.ArgumentSet callArgs, bool enqueue) Line 64	C#
Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.Values.FunctionInfo.DoCall(Microsoft.PythonTools.Parsing.Ast.Node node, Microsoft.PythonTools.Analysis.AnalysisUnit callingUnit, Microsoft.PythonTools.Analysis.Analyzer.FunctionAnalysisUnit calledUnit, Microsoft.PythonTools.Analysis.Values.ArgumentSet callArgs) Line 162	C#
Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.Values.FunctionInfo.Call(Microsoft.PythonTools.Parsing.Ast.Node node, Microsoft.PythonTools.Analysis.AnalysisUnit unit, Microsoft.PythonTools.Analysis.IAnalysisSet[] args, Microsoft.PythonTools.Parsing.Ast.NameExpression[] keywordArgNames) Line 99	C#
Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.Analyzer.ExpressionEvaluator.EvaluateCall(Microsoft.PythonTools.Analysis.Analyzer.ExpressionEvaluator ee, Microsoft.PythonTools.Parsing.Ast.Node node) Line 378	C#
Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.Analyzer.ExpressionEvaluator.EvaluateWorker(Microsoft.PythonTools.Parsing.Ast.Node node) Line 211	C#
Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.Analyzer.ExpressionEvaluator.Evaluate(Microsoft.PythonTools.Parsing.Ast.Expression node) Line 55	C#
Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.Analyzer.DDG.Walk(Microsoft.PythonTools.Parsing.Ast.ExpressionStatement node) Line 217	C#
Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Parsing.Ast.ExpressionStatement.Walk(Microsoft.PythonTools.Parsing.Ast.PythonWalker walker) Line 33	C#
Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.Analyzer.DDG.Walk(Microsoft.PythonTools.Parsing.Ast.SuiteStatement node) Line 675	C#
Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Parsing.Ast.SuiteStatement.Walk(Microsoft.PythonTools.Parsing.Ast.PythonWalker walker) Line 34	C#
Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.Analyzer.DDG.Walk(Microsoft.PythonTools.Parsing.Ast.IfStatement node) Line 538	C#
Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Parsing.Ast.IfStatement.Walk(Microsoft.PythonTools.Parsing.Ast.PythonWalker walker) Line 45	C#
Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.Analyzer.DDG.Walk(Microsoft.PythonTools.Parsing.Ast.SuiteStatement node) Line 675	C#
Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Parsing.Ast.SuiteStatement.Walk(Microsoft.PythonTools.Parsing.Ast.PythonWalker walker) Line 34	C#
Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.Analyzer.FunctionAnalysisUnit.AnalyzeWorker(Microsoft.PythonTools.Analysis.Analyzer.DDG ddg, System.Threading.CancellationToken cancel) Line 102	C#
Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.AnalysisUnit.Analyze(Microsoft.PythonTools.Analysis.Analyzer.DDG ddg, System.Threading.CancellationToken cancel) Line 141	C#
Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.Analyzer.DDG.Analyze(Microsoft.PythonTools.Analysis.Deque<Microsoft.PythonTools.Analysis.AnalysisUnit> queue, System.Threading.CancellationToken cancel, System.Action<int> reportQueueSize, int reportQueueInterval) Line 75	C#
Microsoft.Python.Analysis.Engine.dll!Microsoft.PythonTools.Analysis.PythonAnalyzer.AnalyzeQueuedEntries(System.Threading.CancellationToken cancel) Line 935	C#