Another COR_E_FAILFAST (-2146232797), courtesy of new()

[vsfeedback]

This issue has been moved from a ticket on Developer Community.

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[severity:It bothers me. A fix would be nice]
Paste anywhere a statement could go

stackalloc X[new(), new()];

100 charactersssssssssssssss

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Original Comments

Feedback Bot on 3/3/2024, 09:04 PM:

(private comment, text removed)

Jared Parsons [MSFT] on 3/7/2024, 03:49 PM:

(private comment, text removed)

[jaredpar]

The exception is an unreachable code issue.

Stack trace

System.InvalidOperationException: This program location is thought to be unreachable. File='/_/src/Compilers/CSharp/Portable/FlowAnalysis/AbstractFlowPass.cs' Line=3357
   at Microsoft.CodeAnalysis.CSharp.AbstractFlowPass`2.VisitUnconvertedObjectCreationExpression(BoundUnconvertedObjectCreationExpression node) in /_/src/Compilers/CSharp/Portable/FlowAnalysis/AbstractFlowPass.cs:line 3357
   at Microsoft.CodeAnalysis.CSharp.BoundUnconvertedObjectCreationExpression.Accept(BoundTreeVisitor visitor) in /_/src/Compilers/CSharp/Portable/Generated/BoundNodes.xml.Generated.cs:line 6203
   at Microsoft.CodeAnalysis.CSharp.AbstractFlowPass`2.VisitExpressionWithoutStackGuard(BoundExpression node) in /_/src/Compilers/CSharp/Portable/FlowAnalysis/AbstractFlowPass.cs:line 376
   at Microsoft.CodeAnalysis.CSharp.BoundTreeVisitor.VisitExpressionWithStackGuard(Int32& recursionDepth, BoundExpression node) in /_/src/Compilers/CSharp/Portable/BoundTree/BoundTreeVisitors.cs:line 212
   at Microsoft.CodeAnalysis.CSharp.AbstractFlowPass`2.VisitRvalue(BoundExpression node, Boolean isKnownToBeAnLvalue) in /_/src/Compilers/CSharp/Portable/FlowAnalysis/AbstractFlowPass.cs:line 663
   at Microsoft.CodeAnalysis.CSharp.AbstractFlowPass`2.VisitBadExpression(BoundBadExpression node) in /_/src/Compilers/CSharp/Portable/FlowAnalysis/AbstractFlowPass.cs:line 1521
   at Microsoft.CodeAnalysis.CSharp.BoundBadExpression.Accept(BoundTreeVisitor visitor) in /_/src/Compilers/CSharp/Portable/Generated/BoundNodes.xml.Generated.cs:line 992
   at Microsoft.CodeAnalysis.CSharp.AbstractFlowPass`2.VisitExpressionWithoutStackGuard(BoundExpression node) in /_/src/Compilers/CSharp/Portable/FlowAnalysis/AbstractFlowPass.cs:line 376
   at Microsoft.CodeAnalysis.CSharp.BoundTreeVisitor.VisitExpressionWithStackGuard(BoundExpression node) in /_/src/Compilers/CSharp/Portable/BoundTree/BoundTreeVisitors.cs:line 242
   at Microsoft.CodeAnalysis.CSharp.BoundTreeVisitor.VisitExpressionWithStackGuard(Int32& recursionDepth, BoundExpression node) in /_/src/Compilers/CSharp/Portable/BoundTree/BoundTreeVisitors.cs:line 216
   at Microsoft.CodeAnalysis.CSharp.AbstractFlowPass`2.VisitRvalue(BoundExpression node, Boolean isKnownToBeAnLvalue) in /_/src/Compilers/CSharp/Portable/FlowAnalysis/AbstractFlowPass.cs:line 663
   at Microsoft.CodeAnalysis.CSharp.AbstractFlowPass`2.VisitExpressionStatement(BoundExpressionStatement node) in /_/src/Compilers/CSharp/Portable/FlowAnalysis/AbstractFlowPass.cs:line 1279
   at Microsoft.CodeAnalysis.CSharp.BoundExpressionStatement.Accept(BoundTreeVisitor visitor) in /_/src/Compilers/CSharp/Portable/Generated/BoundNodes.xml.Generated.cs:line 3579
   at Microsoft.CodeAnalysis.CSharp.AbstractFlowPass`2.Visit(BoundNode node) in /_/src/Compilers/CSharp/Portable/FlowAnalysis/AbstractFlowPass.cs:line 343
   at Microsoft.CodeAnalysis.CSharp.AbstractFlowPass`2.VisitStatement(BoundStatement statement) in /_/src/Compilers/CSharp/Portable/FlowAnalysis/AbstractFlowPass.cs:line 673
   at Microsoft.CodeAnalysis.CSharp.DefiniteAssignmentPass.VisitStatementsWithLocalFunctions(BoundBlock block) in /_/src/Compilers/CSharp/Portable/FlowAnalysis/DefiniteAssignment.cs:line 2154
   at Microsoft.CodeAnalysis.CSharp.DefiniteAssignmentPass.VisitBlock(BoundBlock node) in /_/src/Compilers/CSharp/Portable/FlowAnalysis/DefiniteAssignment.cs:line 2089
   at Microsoft.CodeAnalysis.CSharp.BoundBlock.Accept(BoundTreeVisitor visitor) in /_/src/Compilers/CSharp/Portable/Generated/BoundNodes.xml.Generated.cs:line 3223
   at Microsoft.CodeAnalysis.CSharp.AbstractFlowPass`2.Visit(BoundNode node) in /_/src/Compilers/CSharp/Portable/FlowAnalysis/AbstractFlowPass.cs:line 343
   at Microsoft.CodeAnalysis.CSharp.DefiniteAssignmentPass.Scan(Boolean& badRegion) in /_/src/Compilers/CSharp/Portable/FlowAnalysis/DefiniteAssignment.cs:line 372
   at Microsoft.CodeAnalysis.CSharp.AbstractFlowPass`2.Analyze(Boolean& badRegion, Optional`1 initialState) in /_/src/Compilers/CSharp/Portable/FlowAnalysis/AbstractFlowPass.cs:line 448
   at Microsoft.CodeAnalysis.CSharp.DefiniteAssignmentPass.Analyze(Boolean& badRegion, DiagnosticBag diagnostics) in /_/src/Compilers/CSharp/Portable/FlowAnalysis/DefiniteAssignment.cs:line 683
   at Microsoft.CodeAnalysis.CSharp.DefiniteAssignmentPass.<Analyze>g__analyze|40_1(Boolean strictAnalysis, <>c__DisplayClass40_0&) in /_/src/Compilers/CSharp/Portable/FlowAnalysis/DefiniteAssignment.cs:line 640
   at Microsoft.CodeAnalysis.CSharp.DefiniteAssignmentPass.Analyze(CSharpCompilation compilation, MethodSymbol member, BoundNode node, DiagnosticBag diagnostics, ImmutableArray`1& implicitlyInitializedFieldsOpt, Boolean requireOutParamsAssigned) in /_/src/Compilers/CSharp/Portable/FlowAnalysis/DefiniteAssignment.cs:line 553
   at Microsoft.CodeAnalysis.CSharp.FlowAnalysisPass.Rewrite(MethodSymbol method, BoundBlock block, TypeCompilationState compilationState, BindingDiagnosticBag diagnostics, Boolean hasTrailingExpression, Boolean originalBodyNested) in /_/src/Compilers/CSharp/Portable/FlowAnalysis/FlowAnalysisPass.cs:line 51
   at Microsoft.CodeAnalysis.CSharp.MethodCompiler.CompileMethod(MethodSymbol methodSymbol, Int32 methodOrdinal, ProcessedFieldInitializers& processedInitializers, SynthesizedSubmissionFields previousSubmissionFields, TypeCompilationState compilationState) in /_/src/Compilers/CSharp/Portable/Compiler/MethodCompiler.cs:line 1080
   at Microsoft.CodeAnalysis.CSharp.MethodCompiler.CompileNamedType(NamedTypeSymbol containingType) in /_/src/Compilers/CSharp/Portable/Compiler/MethodCompiler.cs:line 530
   at Microsoft.CodeAnalysis.CSharp.MethodCompiler.<>c__DisplayClass25_0.<CompileNamedTypeAsync>b__0() in /_/src/Compilers/CSharp/Portable/Compiler/MethodCompiler.cs:line 432
   at Roslyn.Utilities.UICultureUtilities.<>c__DisplayClass5_0.<WithCurrentUICulture>b__0() in /_/src/Compilers/Core/Portable/InternalUtilities/UICultureUtilities.cs:line 139
   at System.Threading.Tasks.Task.InnerInvoke()
   at System.Threading.Tasks.Task.<>c.<.cctor>b__281_0(Object obj)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
--- End of stack trace from previous location ---
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread)
--- End of stack trace from previous location ---
   at Microsoft.CodeAnalysis.CSharp.MethodCompiler.CompileMethodBodies(CSharpCompilation compilation, PEModuleBuilder moduleBeingBuiltOpt, Boolean emittingPdb, Boolean hasDeclarationErrors, Boolean emitMethodBodies, BindingDiagnosticBag diagnostics, Predicate`1 filterOpt, CancellationToken cancellationToken) in /_/src/Compilers/CSharp/Portable/Compiler/MethodCompiler.cs:line 160
   at Microsoft.CodeAnalysis.CSharp.CSharpCompilation.GetDiagnosticsForAllMethodBodies(BindingDiagnosticBag diagnostics, Boolean doLowering, CancellationToken cancellationToken) in /_/src/Compilers/CSharp/Portable/Compilation/CSharpCompilation.cs:line 2938
   at Microsoft.CodeAnalysis.CSharp.CSharpCompilation.GetDiagnosticsWithoutSeverityFiltering(CompilationStage stage, Boolean includeEarlierStages, BindingDiagnosticBag builder, Predicate`1 symbolFilter, CancellationToken cancellationToken) in /_/src/Compilers/CSharp/Portable/Compilation/CSharpCompilation.cs:line 2910
   at Microsoft.CodeAnalysis.Diagnostics.CompilationWithAnalyzers.<GetAllDiagnosticsAsync>g__getAllDiagnosticsWithoutStateTrackingAsync|35_0(ImmutableArray`1 analyzers, CancellationToken cancellationToken) in /_/src/Compilers/Core/Portable/DiagnosticAnalyzer/CompilationWithAnalyzers.cs:line 313
   at Microsoft.CodeAnalysis.Diagnostics.CompilationWithAnalyzers.GetAllDiagnosticsAsync(CancellationToken cancellationToken) in /_/src/Compilers/Core/Portable/DiagnosticAnalyzer/CompilationWithAnalyzers.cs:line 294
   at MirrorSharp.Internal.Roslyn.RoslynSession.GetDiagnosticsAsync(CancellationToken cancellationToken) in D:\a\SharpLab\SharpLab\!roslyn-branches\dotnet-main\sharplab\source\#external\mirrorsharp\Common\Internal\Roslyn\RoslynSession.cs:line 99
   at MirrorSharp.Internal.Handlers.SlowUpdateHandler.ExecuteAsync(AsyncData data, WorkSession session, ICommandResultSender sender, CancellationToken cancellationToken) in D:\a\SharpLab\SharpLab\!roslyn-branches\dotnet-main\sharplab\source\#external\mirrorsharp\Common\Internal\Handlers\SlowUpdateHandler.cs:line 27
   at MirrorSharp.Internal.Connection.ReceiveAndProcessInternalAsync(CancellationToken cancellationToken) in D:\a\SharpLab\SharpLab\!roslyn-branches\dotnet-main\sharplab\source\#external\mirrorsharp\Common\Internal\Connection.cs:line 96
   at MirrorSharp.Internal.Connection.ReceiveAndProcessAsync(CancellationToken cancellationToken) in D:\a\SharpLab\SharpLab\!roslyn-branches\dotnet-main\sharplab\source\#external\mirrorsharp\Common\Internal\Connection.cs:line 54