roslyn: "csc.exe" exited with code -2146232797 ("CompilerServer: server failed [...] Reached end of stream before end of read.")

Version Used:

C# compiler: 4.1.0-3.22071.8 (663228dd)
SDK: 6.0.200-preview.22055.15
VisualStudio 17.1.0 Preview 5.0 (VS2022)

Steps to Reproduce: I am trying to re-compile my library (Unknown6656/Unknown6656.Core@e36c60073ed88f5c5b2b2de89b3cf791fa0fefd7) which worked perfectly fine in VS 17.1 Preview 1.1 using .NET SDK 5.0.104.

However, I currently get the following error:

Error	MSB6006	"csc.exe" exited with code -2146232797.	Unknown6656.Core

Here is the relevant section from the build log:

[...]

1>Target CoreCompile:
1>  Building target "CoreCompile" completely.
1>  Output file "obj\Release\Unknown6656.Core.dll" does not exist.
1>  Using "Csc" task from assembly "C:\Program Files\VS2022P\MSBuild\Current\Bin\Roslyn\Microsoft.Build.Tasks.CodeAnalysis.dll".
1>  Task "Csc"
1>    C:\Program Files\VS2022P\MSBuild\Current\Bin\Roslyn\csc.exe
            /noconfig
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            /errorreport:prompt
            /warn:6
            /define:TRACE;DOUBLE_PRECISION;RELEASE;NET;NET6_0;NETCOREAPP;NET5_0_OR_GREATER;NET6_0_OR_GREATER;NETCOREAPP1_0_OR_GREATER;NETCOREAPP1_1_OR_GREATER;NETCOREAPP2_0_OR_GREATER;NETCOREAPP2_1_OR_GREATER;NETCOREAPP2_2_OR_GREATER;NETCOREAPP3_0_OR_GREATER;NETCOREAPP3_1_OR_GREATER
            /errorendlocation
            /preferreduilang:en-US
            /highentropyva+
            /nullable:enable
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            /reference:"C:\Program Files\dotnet\packs\Microsoft.NETCore.App.Ref\6.0.1\ref\net6.0\System.Xml.Serialization.dll"
            /reference:"C:\Program Files\dotnet\packs\Microsoft.NETCore.App.Ref\6.0.1\ref\net6.0\System.Xml.XDocument.dll"
            /reference:"C:\Program Files\dotnet\packs\Microsoft.NETCore.App.Ref\6.0.1\ref\net6.0\System.Xml.XmlDocument.dll"
            /reference:"C:\Program Files\dotnet\packs\Microsoft.NETCore.App.Ref\6.0.1\ref\net6.0\System.Xml.XmlSerializer.dll"
            /reference:"C:\Program Files\dotnet\packs\Microsoft.NETCore.App.Ref\6.0.1\ref\net6.0\System.Xml.XPath.dll"
            /reference:"C:\Program Files\dotnet\packs\Microsoft.NETCore.App.Ref\6.0.1\ref\net6.0\System.Xml.XPath.XDocument.dll"
            /reference:C:\Users\unknown6656\.nuget\packages\unknown6656.discriminatedunions\1.0.0\lib\netcoreapp3.1\Unknown6656.DiscriminatedUnions.dll
            /reference:C:\Users\unknown6656\.nuget\packages\unknown6656.indexableproperties\1.0.0\lib\netcoreapp3.1\Unknown6656.IndexableProperties.dll
            /reference:"C:\Program Files\dotnet\packs\Microsoft.NETCore.App.Ref\6.0.1\ref\net6.0\WindowsBase.dll"
            /debug-
            /debug:portable
            /filealign:512
            /optimize+
            /out:obj\Release\Unknown6656.Core.dll
            /target:library
            /warnaserror-
            /utf8output
            /deterministic+
            /langversion:preview
            /analyzerconfig:obj\Release\Unknown6656.Core.GeneratedMSBuildEditorConfig.editorconfig
            /analyzerconfig:"C:\Program Files\dotnet\sdk\6.0.200-preview.22055.15\Sdks\Microsoft.NET.Sdk\analyzers\build\config\analysislevel_6_default.editorconfig"
            /analyzer:"C:\Program Files\dotnet\sdk\6.0.200-preview.22055.15\Sdks\Microsoft.NET.Sdk\targets\..\analyzers\Microsoft.CodeAnalysis.CSharp.NetAnalyzers.dll"
            /analyzer:"C:\Program Files\dotnet\sdk\6.0.200-preview.22055.15\Sdks\Microsoft.NET.Sdk\targets\..\analyzers\Microsoft.CodeAnalysis.NetAnalyzers.dll"
            /analyzer:"C:\Program Files\dotnet\sdk\6.0.200-preview.22055.15\Sdks\Microsoft.NET.Sdk\targets\..\analyzers\ILLink.CodeFixProvider.dll"
            /analyzer:"C:\Program Files\dotnet\sdk\6.0.200-preview.22055.15\Sdks\Microsoft.NET.Sdk\targets\..\analyzers\ILLink.RoslynAnalyzer.dll"
            /analyzer:"C:\Program Files\dotnet\packs\Microsoft.NETCore.App.Ref\6.0.1\analyzers/dotnet/cs/System.Text.Json.SourceGeneration.dll"
            Assembly.cs
            Box.cs
            Common\ConcurrentHashSet.cs
            Common\CustomEqualityComparer.cs
            Common\FunctionExtensions.cs
            Common\LINQ.cs
            Common\LINQExtensions.cs
            Common\NativeInterop.cs
            Common\ObservableDictionary.cs
            Common\StringExtensions.cs
            Controls\Console\ConsoleExtensions.cs
            Controls\Console\ControlHost.cs
            Controls\Console\Controls.cs
            Imaging\BitmapEffect.cs
            Imaging\BitmapExtensions.cs
            Imaging\BitmapLocker.cs
            Imaging\BitmapMasking.cs
            Imaging\Color.cs
            Imaging\ColorMemberGenerator.cs
            Imaging\Effects\Effects.cs
            Imaging\FunctionPlotter.cs
            Imaging\HDRBitmap.cs
            Imaging\PhysicalSpectrums.cs
            Imaging\ShapeRasterizer.cs
            Imaging\Spectrum.cs
            Imaging\VideoAssembler.cs
            IO\BinaryStreamExtensions.cs
            IO\COMObject.cs
            IO\CompressionFunction.cs
            IO\CompressionFunctions.cs
            IO\FileSystemExtensions.cs
            IO\INIFile.cs
            IO\Serializer.cs
            IO\UnsafeFunctionPointer.cs
            Mathematics\Analysis\Cached.cs
            Mathematics\Analysis\Complex.cs
            Mathematics\Analysis\DensityFunction.cs
            Mathematics\Analysis\Equation.cs
            Mathematics\Analysis\FourierTransform.cs
            Mathematics\Analysis\Function.cs
            Mathematics\Analysis\Functions.cs
            Mathematics\Analysis\Polynomial.cs
            Mathematics\Analysis\Polynomial.Extensions.cs
            Mathematics\Cryptography\Cipher.cs
            Mathematics\Cryptography\HashFunction.cs
            Mathematics\Cryptography\HashFunctions.cs
            Mathematics\Cryptography\TextbookRSA.cs
            Mathematics\Cryptography\Vigenere.cs
            Mathematics\Geometry\Shape2D.cs
            Mathematics\Graphs\Computation\FiniteAutomaton.cs
            Mathematics\Graphs\Computation\TuringMachine.cs
            Mathematics\Graphs\Graph.cs
            Mathematics\Graphs\Heaps.cs
            Mathematics\Graphs\Tree.cs
            Mathematics\LinearAlgebra\Extensions.cs
            Mathematics\LinearAlgebra\Interfaces.cs
            Mathematics\LinearAlgebra\Matrix.cs
            Mathematics\LinearAlgebra\ModuloRing.cs
            Mathematics\LinearAlgebra\NDimensional.cs
            Mathematics\LinearAlgebra\Norms.cs
            Mathematics\LinearAlgebra\Scalar.cs
            Mathematics\LinearAlgebra\Vector.cs
            Mathematics\LinearAlgebra\VectorSpace.cs
            Mathematics\MathExtensions.cs
            Mathematics\Numerics\Fraction.cs
            Mathematics\Numerics\Random.cs
            Mathematics\Numerics\Sequence.cs
            Mathematics\Numerics\UInt128.cs
            Mathematics\Numerics\VarInt.cs
            Mathematics\PerlinNoise.cs
            Mathematics\Primes.cs
            Mathematics\StackBasedCalculator.cs
            Mathematics\Statistics\ProbabilityDistribution.cs
            Mathematics\Statistics\RegressionDataSet.cs
            Optimization\LinearEquationSolvers.cs
            Optimization\OptimizationProblems.cs
            Optimization\ParticleSwarmOptimization.cs
            __empty.cs
            "obj\Release\.NETCoreApp,Version=v6.0.AssemblyAttributes.cs"
            obj\Release\Unknown6656.Core.AssemblyInfo.cs
            /warnaserror+:NU1605

1>    CompilerServer: server failed - server rejected the request 'Error reading response: Reached end of stream before end of read.' - dcaebc47-26b7-40bd-b525-50a0f9f02b7e
1>    Microsoft (R) Visual C# Compiler version 4.1.0-3.22071.8 (663228dd)
1>    Copyright (C) Microsoft Corporation. All rights reserved.
1>
1>    C:\Program Files\VS2022P\MSBuild\Current\Bin\Roslyn\Microsoft.CSharp.Core.targets(75,5): error MSB6006: "csc.exe" exited with code -2146232797.
1>  Done executing task "Csc" -- FAILED.

[...]

The .csproj file in question can be seen here: https://github.com/Unknown6656/Unknown6656.Core/blob/e36c60073ed88f5c5b2b2de89b3cf791fa0fefd7/Unknown6656.Core/Unknown6656.Core.csproj

I already tried the following - without success:

Clean reinstall of VS2022.
Clean reinstall of .NET5 and .NET6 SDK.
Repairing the existing VS2022 and .NET SDK installations.
Rebuilding the entire solution/project after deleting the bin/ and obj/ folders.
Rebuilding the entire solution/project after removing the .vs/ folder and .user/.suo-files.

Can someone help me on this issue? Thank you.

About this issue

Original URL
State: closed
Created 2 years ago
Comments: 16 (7 by maintainers)

Commits related to this issue

code refactoring due to https://github.com/dotnet/roslyn/issues/59336 — committed to Unknown6656/Unknown6656.Core by Unknown6656 2 years ago

Most upvoted comments

I was able to repro the crash (code sample below). It requires a conversion of anonymous function (delegate { }) to a delegate type involving nullability attributes.

Note: if you change from anonymous function syntax to lambda syntax (x, y) => {...} or (_, _) => {...} you will get a warning:

// (11,31): warning CS8622: Nullability of reference types in type of parameter 'y' of 'lambda expression' doesn't match the target delegate 'MyDelegate<object>' (possibly because of nullability attributes).
                //         PickedColorChanged += (x, y) => { System.Console.WriteLine(); };
                Diagnostic(ErrorCode.WRN_NullabilityMismatchInParameterTypeOfTargetDelegate, "(x, y) =>").WithArguments("y", "lambda expression", "MyDelegate<object>").WithLocation(11, 31)

The crash occurs when we try to report this diagnostic on an anonymous function (parameters don’t have names).

        [Fact, WorkItem(59336, "https://github.com/dotnet/roslyn/issues/59336")]
        public void ParameterNameCrash()
        {
            var source = @"
#nullable enable

public delegate void MyDelegate<T>(object sender, [System.Diagnostics.CodeAnalysis.MaybeNull] T e);

class C
{
    public event MyDelegate<object>? PickedColorChanged;
    void M()
    {
        PickedColorChanged += delegate { System.Console.WriteLine(); };
        PickedColorChanged?.Invoke(this, this);
    }
}";
            var comp = CreateCompilation(new[] { source, MaybeNullAttributeDefinition });
            comp.VerifyDiagnostics(
                );
        }

jcouv on Feb 12, 2022

@Unknown6656 Thanks. That helps a lot. The exception is a NullReferenceException in method PlainUnboundLambdaState.ParameterName(int) during nullable analysis, due to _parameterNames being uninitialized. The expression being analyzed is PickedColorChanged += delegate { RequestRender(); };. I tried recreating the problem with some tiny code samples but didn’t succeed yet.

Would you mind digging one more piece of information? Get the version information for C:\Program Files\VS2022P\MSBuild\Current\Bin\Roslyn\Microsoft.CodeAnalysis.CSharp.dll. To do that, find the file in File Explorer, right-click on it and open Properties. In the Details tab, please copy or screenshot the Product Version (should be something like 4.1.0-....+... with a long hexadecimal sequence). Sorry, it’s annoying, there’s not an easy way to copy that string from the Properties UI 😕

jcouv on Feb 12, 2022