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Visual Studio crashes with NullReferenceException on certain applications of the as operator to tuples #17962

Closed
VladimirReshetnikov opened this issue Mar 18, 2017 · 2 comments · Fixed by #18416
Closed

Visual Studio crashes with NullReferenceException on certain applications of the as operator to tuples #17962

VladimirReshetnikov opened this issue Mar 18, 2017 · 2 comments · Fixed by #18416
Assignees
@jcouv
Labels
Area-Compilers Bug Feature - Tuples Tuples Resolution-Fixed The bug has been fixed and/or the requested behavior has been implemented
Milestone
15.3

Comments

@VladimirReshetnikov
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Version Used:

Microsoft Visual Studio Enterprise 2017
Version 15.0.26228.9 D15RTWSVC
Microsoft .NET Framework
Version 4.6.01586

Steps to Reproduce:

Try to compile:

class C
{
    static void Foo<T>()
    {
        var x = (0, null) as (int, T)?;
        Console.WriteLine(x == null);
    }
}

Expected Behavior: No crash

Actual Behavior: Visual Studio crashes:

System.NullReferenceException:  Object reference not set to an instance of an object.
	Microsoft.CodeAnalysis.CSharp.dll!Microsoft.CodeAnalysis.CSharp.Binder.BindAsOperator(Microsoft.CodeAnalysis.CSharp.Syntax.BinaryExpressionSyntax node = BinaryExpressionSyntax AsExpression (0, null) as (int, T)?, Microsoft.CodeAnalysis.DiagnosticBag diagnostics = Count = 0)	Unknown
 	Microsoft.CodeAnalysis.CSharp.dll!Microsoft.CodeAnalysis.CSharp.Binder.BindExpressionInternal(Microsoft.CodeAnalysis.CSharp.Syntax.ExpressionSyntax node, Microsoft.CodeAnalysis.DiagnosticBag diagnostics, bool invoked, bool indexed)	Unknown
 	Microsoft.CodeAnalysis.CSharp.dll!Microsoft.CodeAnalysis.CSharp.Binder.BindExpression(Microsoft.CodeAnalysis.CSharp.Syntax.ExpressionSyntax node = BinaryExpressionSyntax AsExpression (0, null) as (int, T)?, Microsoft.CodeAnalysis.DiagnosticBag diagnostics = Count = 0, bool invoked, bool indexed)	Unknown
 	Microsoft.CodeAnalysis.CSharp.dll!Microsoft.CodeAnalysis.CSharp.Binder.BindInferredVariableInitializer(Microsoft.CodeAnalysis.DiagnosticBag diagnostics = Count = 0, Microsoft.CodeAnalysis.CSharp.Syntax.ExpressionSyntax initializer, Microsoft.CodeAnalysis.CSharp.Binder.BindValueKind valueKind = RValue, Microsoft.CodeAnalysis.CSharp.CSharpSyntaxNode errorSyntax = VariableDeclaratorSyntax VariableDeclarator x = (0, null) as (int, T)?)	Unknown
 	Microsoft.CodeAnalysis.CSharp.dll!Microsoft.CodeAnalysis.CSharp.Binder.BindVariableDeclaration(Microsoft.CodeAnalysis.CSharp.Symbols.SourceLocalSymbol localSymbol = {System.NullReferenceException}, Microsoft.CodeAnalysis.CSharp.Symbols.LocalDeclarationKind kind = RegularVariable, bool isVar = true, Microsoft.CodeAnalysis.CSharp.Syntax.VariableDeclaratorSyntax declarator = VariableDeclaratorSyntax VariableDeclarator x = (0, null) as (int, T)?, Microsoft.CodeAnalysis.CSharp.Syntax.TypeSyntax typeSyntax = IdentifierNameSyntax IdentifierName var, Microsoft.CodeAnalysis.CSharp.Symbols.TypeSymbol declTypeOpt, Microsoft.CodeAnalysis.CSharp.Symbols.AliasSymbol aliasOpt = null, Microsoft.CodeAnalysis.DiagnosticBag diagnostics = Count = 0, Microsoft.CodeAnalysis.CSharp.CSharpSyntaxNode associatedSyntaxNode)	Unknown
 	Microsoft.CodeAnalysis.CSharp.dll!Microsoft.CodeAnalysis.CSharp.Binder.BindDeclarationStatementParts(Microsoft.CodeAnalysis.CSharp.Syntax.LocalDeclarationStatementSyntax node, Microsoft.CodeAnalysis.DiagnosticBag diagnostics)	Unknown
 	Microsoft.CodeAnalysis.CSharp.dll!Microsoft.CodeAnalysis.CSharp.Binder.BindStatement(Microsoft.CodeAnalysis.CSharp.Syntax.StatementSyntax node, Microsoft.CodeAnalysis.DiagnosticBag diagnostics)	Unknown
 	Microsoft.CodeAnalysis.CSharp.dll!Microsoft.CodeAnalysis.CSharp.Binder.BindBlockParts(Microsoft.CodeAnalysis.CSharp.Syntax.BlockSyntax node = BlockSyntax Block { var x = (0, null) as (int, T)?; Console.WriteLine(x == null); }, Microsoft.CodeAnalysis.DiagnosticBag diagnostics = Count = 0)	Unknown
 	Microsoft.CodeAnalysis.CSharp.dll!Microsoft.CodeAnalysis.CSharp.MethodCompiler.BindMethodBody(Microsoft.CodeAnalysis.CSharp.Symbols.MethodSymbol method = Method void C.Foo<T>(), Microsoft.CodeAnalysis.CSharp.TypeCompilationState compilationState = {Microsoft.CodeAnalysis.CSharp.TypeCompilationState}, Microsoft.CodeAnalysis.DiagnosticBag diagnostics = Count = 0, out Microsoft.CodeAnalysis.CSharp.ImportChain importChain, out bool originalBodyNested = false)	Unknown
 	Microsoft.CodeAnalysis.CSharp.dll!Microsoft.CodeAnalysis.CSharp.MethodCompiler.CompileMethod(Microsoft.CodeAnalysis.CSharp.Symbols.MethodSymbol methodSymbol = Method void C.Foo<T>(), int methodOrdinal = 1, ref Microsoft.CodeAnalysis.CSharp.Binder.ProcessedFieldInitializers processedInitializers = {Microsoft.CodeAnalysis.CSharp.Binder.ProcessedFieldInitializers}, Microsoft.CodeAnalysis.CSharp.SynthesizedSubmissionFields previousSubmissionFields = null, Microsoft.CodeAnalysis.CSharp.TypeCompilationState compilationState = {Microsoft.CodeAnalysis.CSharp.TypeCompilationState})	Unknown
 	Microsoft.CodeAnalysis.CSharp.dll!Microsoft.CodeAnalysis.CSharp.MethodCompiler.CompileNamedType(Microsoft.CodeAnalysis.CSharp.Symbols.NamedTypeSymbol containingType = NamedType C)	Unknown
 	Microsoft.CodeAnalysis.CSharp.dll!Microsoft.CodeAnalysis.CSharp.MethodCompiler.VisitNamedType(Microsoft.CodeAnalysis.CSharp.Symbols.NamedTypeSymbol symbol, Microsoft.CodeAnalysis.CSharp.TypeCompilationState arg)	Unknown
 	Microsoft.CodeAnalysis.CSharp.dll!Microsoft.CodeAnalysis.CSharp.Symbols.NamedTypeSymbol.Accept<System.__Canon, System.__Canon>(Microsoft.CodeAnalysis.CSharp.CSharpSymbolVisitor<System.__Canon, System.__Canon> visitor, System.__Canon argument)	Unknown
 	Microsoft.CodeAnalysis.CSharp.dll!Microsoft.CodeAnalysis.CSharp.MethodCompiler.CompileNamespace(Microsoft.CodeAnalysis.CSharp.Symbols.NamespaceSymbol symbol)	Unknown
 	Microsoft.CodeAnalysis.CSharp.dll!Microsoft.CodeAnalysis.CSharp.MethodCompiler.CompileMethodBodies(Microsoft.CodeAnalysis.CSharp.CSharpCompilation compilation = {Microsoft.CodeAnalysis.CSharp.CSharpCompilation}, Microsoft.CodeAnalysis.CSharp.Emit.PEModuleBuilder moduleBeingBuiltOpt = null, bool generateDebugInfo, bool hasDeclarationErrors = false, Microsoft.CodeAnalysis.DiagnosticBag diagnostics = Count = 0, System.Predicate<Microsoft.CodeAnalysis.CSharp.Symbol> filterOpt = {Method = {System.Reflection.RuntimeMethodInfo}}, System.Threading.CancellationToken cancellationToken)	Unknown
 	Microsoft.CodeAnalysis.CSharp.dll!Microsoft.CodeAnalysis.CSharp.CSharpCompilation.GetDiagnosticsForMethodBodiesInTree(Microsoft.CodeAnalysis.SyntaxTree tree, Microsoft.CodeAnalysis.Text.TextSpan? span, System.Threading.CancellationToken cancellationToken)	Unknown
 	Microsoft.CodeAnalysis.CSharp.dll!Microsoft.CodeAnalysis.CSharp.CSharpCompilation.GetDiagnosticsForSyntaxTree(Microsoft.CodeAnalysis.CompilationStage stage, Microsoft.CodeAnalysis.SyntaxTree syntaxTree, Microsoft.CodeAnalysis.Text.TextSpan? filterSpanWithinTree, bool includeEarlierStages, System.Threading.CancellationToken cancellationToken)	Unknown
 	Microsoft.CodeAnalysis.CSharp.dll!Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.GetDiagnostics(Microsoft.CodeAnalysis.Text.TextSpan? span, System.Threading.CancellationToken cancellationToken)	Unknown
 	Microsoft.CodeAnalysis.dll!Microsoft.CodeAnalysis.Diagnostics.CompilationWithAnalyzers.GenerateCompilationEvents(Microsoft.CodeAnalysis.Diagnostics.AnalysisScope analysisScope, System.Threading.CancellationToken cancellationToken)	Unknown
 	Microsoft.CodeAnalysis.dll!Microsoft.CodeAnalysis.Diagnostics.CompilationWithAnalyzers.GenerateCompilationEventsAndPopulateEventsCacheAsync(Microsoft.CodeAnalysis.Diagnostics.AnalysisScope analysisScope, Microsoft.CodeAnalysis.Diagnostics.AnalyzerDriver driver, System.Threading.CancellationToken cancellationToken)	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder.Start<Microsoft.CodeAnalysis.Diagnostics.CompilationWithAnalyzers.<GenerateCompilationEventsAndPopulateEventsCacheAsync>d__57>(ref Microsoft.CodeAnalysis.Diagnostics.CompilationWithAnalyzers.<GenerateCompilationEventsAndPopulateEventsCacheAsync>d__57 stateMachine)	Unknown
 	Microsoft.CodeAnalysis.dll!Microsoft.CodeAnalysis.Diagnostics.CompilationWithAnalyzers.GenerateCompilationEventsAndPopulateEventsCacheAsync(Microsoft.CodeAnalysis.Diagnostics.AnalysisScope analysisScope, Microsoft.CodeAnalysis.Diagnostics.AnalyzerDriver driver, System.Threading.CancellationToken cancellationToken)	Unknown
 	Microsoft.CodeAnalysis.dll!Microsoft.CodeAnalysis.Diagnostics.CompilationWithAnalyzers.ComputeAnalyzerDiagnosticsAsync(Microsoft.CodeAnalysis.Diagnostics.AnalysisScope analysisScope = {Method = {System.Reflection.RuntimeMethodInfo}}, System.Func<Microsoft.CodeAnalysis.Diagnostics.AsyncQueue<Microsoft.CodeAnalysis.Diagnostics.CompilationEvent>> getEventQueue = {Microsoft.CodeAnalysis.Diagnostics.AnalysisScope}, int newTaskToken = IsCancellationRequested = false, System.Threading.CancellationToken cancellationToken = 1)	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.InvokeMoveNext(object stateMachine)	Unknown
 	mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)	Unknown
 	mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.Run()	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.OutputAsyncCausalityEvents.AnonymousMethod__0()	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.TaskAwaiter.OutputWaitEtwEvents.AnonymousMethod__0()	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()	Unknown
 	mscorlib.dll!System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Action action, bool allowInlining, ref System.Threading.Tasks.Task currentTask = null)	Unknown
 	mscorlib.dll!System.Threading.Tasks.Task.FinishContinuations()	Unknown
 	mscorlib.dll!System.Threading.Tasks.Task.FinishStageThree()	Unknown
 	mscorlib.dll!System.Threading.Tasks.Task<System.__Canon>.TrySetResult(System.__Canon result)	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder<Microsoft.CodeAnalysis.Diagnostics.AnalyzerDriver>.SetResult(Microsoft.CodeAnalysis.Diagnostics.AnalyzerDriver result)	Unknown
 	Microsoft.CodeAnalysis.dll!Microsoft.CodeAnalysis.Diagnostics.CompilationWithAnalyzers.GetAnalyzerDriverAsync(System.Threading.CancellationToken cancellationToken)	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.InvokeMoveNext(object stateMachine)	Unknown
 	mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)	Unknown
 	mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.Run()	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.OutputAsyncCausalityEvents.AnonymousMethod__0()	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.TaskAwaiter.OutputWaitEtwEvents.AnonymousMethod__0()	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()	Unknown
 	mscorlib.dll!System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Action action, bool allowInlining, ref System.Threading.Tasks.Task currentTask = null)	Unknown
 	mscorlib.dll!System.Threading.Tasks.Task.FinishContinuations()	Unknown
 	mscorlib.dll!System.Threading.Tasks.Task.FinishStageThree()	Unknown
 	mscorlib.dll!System.Threading.Tasks.Task<System.Threading.Tasks.VoidTaskResult>.TrySetResult(System.Threading.Tasks.VoidTaskResult result)	Unknown
 	mscorlib.dll!System.Threading.Tasks.UnwrapPromise<System.Threading.Tasks.VoidTaskResult>.TrySetFromTask(System.Threading.Tasks.Task task, bool lookForOce)	Unknown
 	mscorlib.dll!System.Threading.Tasks.UnwrapPromise<System.Threading.Tasks.VoidTaskResult>.InvokeCore(System.Threading.Tasks.Task completingTask)	Unknown
 	mscorlib.dll!System.Threading.Tasks.UnwrapPromise<System.Threading.Tasks.VoidTaskResult>.Invoke(System.Threading.Tasks.Task completingTask)	Unknown
 	mscorlib.dll!System.Threading.Tasks.Task.FinishContinuations()	Unknown
 	mscorlib.dll!System.Threading.Tasks.Task.FinishStageThree()	Unknown
 	mscorlib.dll!System.Threading.Tasks.Task<System.Threading.Tasks.VoidTaskResult>.TrySetResult(System.Threading.Tasks.VoidTaskResult result)	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder<System.Threading.Tasks.VoidTaskResult>.SetResult(System.Threading.Tasks.VoidTaskResult result)	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder.SetResult()	Unknown
 	Microsoft.CodeAnalysis.dll!Microsoft.CodeAnalysis.Diagnostics.AnalyzerDriver.Initialize.AnonymousMethod__0()	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.InvokeMoveNext(object stateMachine)	Unknown
 	mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)	Unknown
 	mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.Run()	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.OutputAsyncCausalityEvents.AnonymousMethod__0()	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.TaskAwaiter.OutputWaitEtwEvents.AnonymousMethod__0()	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()	Unknown
 	mscorlib.dll!System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Action action, bool allowInlining, ref System.Threading.Tasks.Task currentTask = null)	Unknown
 	mscorlib.dll!System.Threading.Tasks.Task.FinishContinuations()	Unknown
 	mscorlib.dll!System.Threading.Tasks.Task.FinishStageThree()	Unknown
 	mscorlib.dll!System.Threading.Tasks.Task<System.__Canon>.TrySetResult(System.__Canon result)	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder<Microsoft.CodeAnalysis.Diagnostics.AnalyzerActions>.SetResult(Microsoft.CodeAnalysis.Diagnostics.AnalyzerActions result)	Unknown
 	Microsoft.CodeAnalysis.dll!Microsoft.CodeAnalysis.Diagnostics.AnalyzerDriver.GetAnalyzerActionsAsync(System.Collections.Immutable.ImmutableArray<Microsoft.CodeAnalysis.Diagnostics.DiagnosticAnalyzer> analyzers, Microsoft.CodeAnalysis.Diagnostics.AnalyzerManager analyzerManager, Microsoft.CodeAnalysis.Diagnostics.AnalyzerExecutor analyzerExecutor)	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.InvokeMoveNext(object stateMachine)	Unknown
 	mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)	Unknown
 	mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.Run()	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.OutputAsyncCausalityEvents.AnonymousMethod__0()	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.TaskAwaiter.OutputWaitEtwEvents.AnonymousMethod__0()	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()	Unknown
 	mscorlib.dll!System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Action action, bool allowInlining, ref System.Threading.Tasks.Task currentTask = null)	Unknown
 	mscorlib.dll!System.Threading.Tasks.Task.FinishContinuations()	Unknown
 	mscorlib.dll!System.Threading.Tasks.Task.FinishStageThree()	Unknown
 	mscorlib.dll!System.Threading.Tasks.Task<System.__Canon>.TrySetResult(System.__Canon result)	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder<Microsoft.CodeAnalysis.Diagnostics.AnalyzerActions>.SetResult(Microsoft.CodeAnalysis.Diagnostics.AnalyzerActions result)	Unknown
 	Microsoft.CodeAnalysis.dll!Microsoft.CodeAnalysis.Diagnostics.AnalyzerManager.GetAnalyzerActionsAsync(Microsoft.CodeAnalysis.Diagnostics.DiagnosticAnalyzer analyzer, Microsoft.CodeAnalysis.Diagnostics.AnalyzerExecutor analyzerExecutor)	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.InvokeMoveNext(object stateMachine)	Unknown
 	mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)	Unknown
 	mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.Run()	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.OutputAsyncCausalityEvents.AnonymousMethod__0()	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.TaskAwaiter.OutputWaitEtwEvents.AnonymousMethod__0()	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()	Unknown
 	mscorlib.dll!System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Action action, bool allowInlining, ref System.Threading.Tasks.Task currentTask = null)	Unknown
 	mscorlib.dll!System.Threading.Tasks.Task.FinishContinuations()	Unknown
 	mscorlib.dll!System.Threading.Tasks.Task.FinishStageThree()	Unknown
 	mscorlib.dll!System.Threading.Tasks.Task<System.__Canon>.TrySetResult(System.__Canon result)	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder<Microsoft.CodeAnalysis.Diagnostics.HostCompilationStartAnalysisScope>.SetResult(Microsoft.CodeAnalysis.Diagnostics.HostCompilationStartAnalysisScope result)	Unknown
 	Microsoft.CodeAnalysis.dll!Microsoft.CodeAnalysis.Diagnostics.AnalyzerManager.GetCompilationAnalysisScopeAsync(Microsoft.CodeAnalysis.Diagnostics.DiagnosticAnalyzer analyzer, Microsoft.CodeAnalysis.Diagnostics.HostSessionStartAnalysisScope sessionScope, Microsoft.CodeAnalysis.Diagnostics.AnalyzerExecutor analyzerExecutor)	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.InvokeMoveNext(object stateMachine)	Unknown
 	mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)	Unknown
 	mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.Run()	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.OutputAsyncCausalityEvents.AnonymousMethod__0()	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.TaskAwaiter.OutputWaitEtwEvents.AnonymousMethod__0()	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()	Unknown
 	mscorlib.dll!System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Action action, bool allowInlining, ref System.Threading.Tasks.Task currentTask = null)	Unknown
 	mscorlib.dll!System.Threading.Tasks.Task.FinishContinuations()	Unknown
 	mscorlib.dll!System.Threading.Tasks.Task.FinishStageThree()	Unknown
 	mscorlib.dll!System.Threading.Tasks.Task<System.__Canon>.TrySetResult(System.__Canon result)	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder<Microsoft.CodeAnalysis.Diagnostics.HostCompilationStartAnalysisScope>.SetResult(Microsoft.CodeAnalysis.Diagnostics.HostCompilationStartAnalysisScope result)	Unknown
 	Microsoft.CodeAnalysis.dll!Microsoft.CodeAnalysis.Diagnostics.AnalyzerManager.GetCompilationAnalysisScopeCoreAsync(Microsoft.CodeAnalysis.Diagnostics.HostSessionStartAnalysisScope sessionScope, Microsoft.CodeAnalysis.Diagnostics.AnalyzerExecutor analyzerExecutor, Microsoft.CodeAnalysis.Diagnostics.AnalyzerManager.AnalyzerExecutionContext analyzerExecutionContext)	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.InvokeMoveNext(object stateMachine)	Unknown
 	mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)	Unknown
 	mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.Run()	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.OutputAsyncCausalityEvents.AnonymousMethod__0()	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.TaskAwaiter.OutputWaitEtwEvents.AnonymousMethod__0()	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()	Unknown
 	mscorlib.dll!System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Action action, bool allowInlining, ref System.Threading.Tasks.Task currentTask = null)	Unknown
 	mscorlib.dll!System.Threading.Tasks.Task.FinishContinuations()	Unknown
 	mscorlib.dll!System.Threading.Tasks.Task.FinishStageThree()	Unknown
 	mscorlib.dll!System.Threading.Tasks.Task.FinishStageTwo()	Unknown
 	mscorlib.dll!System.Threading.Tasks.Task.Finish(bool bUserDelegateExecuted)	Unknown
 	mscorlib.dll!System.Threading.Tasks.Task.ExecuteWithThreadLocal(ref System.Threading.Tasks.Task currentTaskSlot = null)	Unknown
 	mscorlib.dll!System.Threading.Tasks.Task.ExecuteEntry(bool bPreventDoubleExecution)	Unknown
 	mscorlib.dll!System.Threading.Tasks.Task.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()	Unknown
 	mscorlib.dll!System.Threading.ThreadPoolWorkQueue.Dispatch()	Unknown
 	mscorlib.dll!System.Threading._ThreadPoolWaitCallback.PerformWaitCallback()	Unknown
@gafter gafter added this to the 15.3 milestone Mar 19, 2017
@gafter gafter added the Feature - Tuples Tuples label Mar 19, 2017
@jcouv jcouv self-assigned this Mar 27, 2017
@jcouv
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jcouv commented Apr 2, 2017

@VSadov I'll stop by tomorrow to discuss. The root of the problem is that binding the "as" operator requires a typed operand.

@jcouv jcouv mentioned this issue Apr 4, 2017
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@jcouv
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jcouv commented May 8, 2017

Fixed by #18416

@jcouv jcouv added the Resolution-Fixed The bug has been fixed and/or the requested behavior has been implemented label May 8, 2017
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Labels
Area-Compilers Bug Feature - Tuples Tuples Resolution-Fixed The bug has been fixed and/or the requested behavior has been implemented
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Milestone
15.3
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Successfully merging a pull request may close this issue.

Fix crash with typeless tuple in "as" operator jcouv/roslyn
3 participants
@VladimirReshetnikov @gafter @jcouv