Omnisharp-vscode: Omnisharp server startup exception: InvalidCast

Created on 11 Sep 2019  路  6Comments  路  Source: OmniSharp/omnisharp-vscode

Issue Description

When starting the OmniSharp server, it encounters a InvalidCastException and cannot start.

Steps to Reproduce

Have .NET Core 2.2 SDK installed, install .NET Core 3.0-preview, then remove .NET Core 3.0-preview, but the issue persists (even after uninstalling and re-installing the Omnisharp plugin). dotnet restore and dotnet run both work without issue.

Expected Behavior

Omnisharp server starts without exception.

Actual Behavior

Omnisharp server encounters an exception, and does not start.

Logs

OmniSharp log

Starting OmniSharp server at 9/11/2019, 2:29:46 PM
Target: /Users/my-user/path/to/project

OmniSharp server started.
Path: /Users/my-user/.vscode/extensions/ms-vscode.csharp-1.21.2/.omnisharp/1.32.19-beta.25/run
PID: 5309

    Starting OmniSharp on MacOS 10.14.5 (x64)
    DotNetPath set to dotnet
    Located 1 MSBuild instance(s)
        1: StandAlone 15.0 - "/Users/my-user/.vscode/extensions/ms-vscode.csharp-1.21.2/.omnisharp/1.32.19-beta.25/omnisharp/.msbuild/Current/Bin"
    MSBUILD_EXE_PATH environment variable set to '/Users/my-user/.vscode/extensions/ms-vscode.csharp-1.21.2/.omnisharp/1.32.19-beta.25/omnisharp/.msbuild/Current/Bin/MSBuild.dll'
    Registered MSBuild instance: StandAlone 15.0 - "/Users/my-user/.vscode/extensions/ms-vscode.csharp-1.21.2/.omnisharp/1.32.19-beta.25/omnisharp/.msbuild/Current/Bin"
        MSBuildExtensionsPath = /Users/my-user/.vscode/extensions/ms-vscode.csharp-1.21.2/.omnisharp/1.32.19-beta.25/omnisharp/.msbuild
        BypassFrameworkInstallChecks = true
        CscToolPath = /Users/my-user/.vscode/extensions/ms-vscode.csharp-1.21.2/.omnisharp/1.32.19-beta.25/omnisharp/.msbuild/Current/Bin/Roslyn
        CscToolExe = csc.exe
        MSBuildToolsPath = /Users/my-user/.vscode/extensions/ms-vscode.csharp-1.21.2/.omnisharp/1.32.19-beta.25/omnisharp/.msbuild/Current/Bin
        TargetFrameworkRootPath = /Library/Frameworks/Mono.framework/Versions/4.0.4/lib/mono/xbuild-frameworks

System.InvalidCastException: Specified cast is not valid.
at Roslyn.Utilities.EventMap.GetRegistries_NoLock[TEventHandler] (System.String eventName) [0x0001b] in <889d2020dcce4567aad80a068551b1d4>:0
at Roslyn.Utilities.EventMap.AddEventHandler[TEventHandler] (System.String eventName, TEventHandler eventHandler) [0x00015] in <889d2020dcce4567aad80a068551b1d4>:0
at Microsoft.CodeAnalysis.Workspace.add_WorkspaceChanged (System.EventHandler1[TEventArgs] value) [0x00000] in <889d2020dcce4567aad80a068551b1d4>:0 at Microsoft.AspNetCore.Razor.OmniSharpPlugin.PrecompiledRazorPageSuppressor..ctor (OmniSharp.OmniSharpWorkspace workspace) [0x0001b] in <8c6f4eb2e16d4051ba80a599aba81c54>:0 at (wrapper dynamic-method) System.Object.lambda_method(System.Runtime.CompilerServices.Closure,System.Composition.Hosting.Core.LifetimeContext,System.Composition.Hosting.Core.CompositionOperation) at System.Composition.Hosting.Core.LifetimeContext.GetOrCreate (System.Int32 sharingId, System.Composition.Hosting.Core.CompositionOperation operation, System.Composition.Hosting.Core.CompositeActivator creator) [0x000a8] in <8e026c716fc84f38aae28085eaaee9fc>:0 at System.Composition.TypedParts.ActivationFeatures.LifetimeFeature+<>c__DisplayClass1_0.<RewriteActivator>b__0 (System.Composition.Hosting.Core.LifetimeContext c, System.Composition.Hosting.Core.CompositionOperation o) [0x00011] in <9aac21a4a3f24063b2b8b59143acddfc>:0 at System.Composition.Hosting.Providers.ImportMany.ImportManyExportDescriptorProvider+<>c__DisplayClass3_21[TElement].b__4 (System.Composition.Hosting.Core.ExportDescriptor e) [0x00006] in <8e026c716fc84f38aae28085eaaee9fc>:0
at System.Linq.Enumerable+SelectArrayIterator2[TSource,TResult].ToArray () [0x00012] in <28b7381f9e304c3eae9fa66907f89854>:0 at System.Linq.Enumerable.ToArray[TSource] (System.Collections.Generic.IEnumerable1[T] source) [0x0001f] in <28b7381f9e304c3eae9fa66907f89854>:0
at System.Composition.Hosting.Providers.ImportMany.ImportManyExportDescriptorProvider+<>c__DisplayClass3_11[TElement].<GetImportManyDescriptor>b__3 (System.Composition.Hosting.Core.LifetimeContext c, System.Composition.Hosting.Core.CompositionOperation o) [0x0002b] in <8e026c716fc84f38aae28085eaaee9fc>:0 at (wrapper dynamic-method) System.Object.lambda_method(System.Runtime.CompilerServices.Closure,System.Composition.Hosting.Core.LifetimeContext,System.Composition.Hosting.Core.CompositionOperation) at System.Composition.Hosting.Core.LifetimeContext.GetOrCreate (System.Int32 sharingId, System.Composition.Hosting.Core.CompositionOperation operation, System.Composition.Hosting.Core.CompositeActivator creator) [0x000a8] in <8e026c716fc84f38aae28085eaaee9fc>:0 at System.Composition.TypedParts.ActivationFeatures.LifetimeFeature+<>c__DisplayClass1_0.<RewriteActivator>b__0 (System.Composition.Hosting.Core.LifetimeContext c, System.Composition.Hosting.Core.CompositionOperation o) [0x00011] in <9aac21a4a3f24063b2b8b59143acddfc>:0 at System.Composition.Hosting.Providers.ImportMany.ImportManyExportDescriptorProvider+<>c__DisplayClass3_21[TElement].b__4 (System.Composition.Hosting.Core.ExportDescriptor e) [0x00006] in <8e026c716fc84f38aae28085eaaee9fc>:0
at System.Linq.Enumerable+SelectArrayIterator2[TSource,TResult].ToArray () [0x00012] in <28b7381f9e304c3eae9fa66907f89854>:0 at System.Linq.Enumerable.ToArray[TSource] (System.Collections.Generic.IEnumerable1[T] source) [0x0001f] in <28b7381f9e304c3eae9fa66907f89854>:0
at System.Composition.Hosting.Providers.ImportMany.ImportManyExportDescriptorProvider+<>c__DisplayClass3_11[TElement].<GetImportManyDescriptor>b__3 (System.Composition.Hosting.Core.LifetimeContext c, System.Composition.Hosting.Core.CompositionOperation o) [0x0002b] in <8e026c716fc84f38aae28085eaaee9fc>:0 at System.Composition.Hosting.Core.CompositionOperation.Run (System.Composition.Hosting.Core.LifetimeContext outermostLifetimeContext, System.Composition.Hosting.Core.CompositeActivator compositionRootActivator) [0x0001c] in <8e026c716fc84f38aae28085eaaee9fc>:0 at System.Composition.Hosting.Core.LifetimeContext.TryGetExport (System.Composition.Hosting.Core.CompositionContract contract, System.Object& export) [0x0001d] in <8e026c716fc84f38aae28085eaaee9fc>:0 at System.Composition.Hosting.CompositionHost.TryGetExport (System.Composition.Hosting.Core.CompositionContract contract, System.Object& export) [0x00000] in <8e026c716fc84f38aae28085eaaee9fc>:0 at System.Composition.CompositionContext.GetExport (System.Composition.Hosting.Core.CompositionContract contract) [0x00000] in <12675e53c8854b48abd187539ce374db>:0 at System.Composition.CompositionContext.GetExports (System.Type exportType, System.String contractName) [0x00023] in <12675e53c8854b48abd187539ce374db>:0 at System.Composition.CompositionContext.GetExports[TExport] (System.String contractName) [0x00000] in <12675e53c8854b48abd187539ce374db>:0 at System.Composition.CompositionContext.GetExports[TExport] () [0x00000] in <12675e53c8854b48abd187539ce374db>:0 at OmniSharp.Stdio.Host.Initialize () [0x0001e] in <3cc12c7c00f344b08c42dfac73970669>:0 at OmniSharp.Stdio.Host..ctor (System.IO.TextReader input, OmniSharp.Services.ISharedTextWriter writer, OmniSharp.IOmniSharpEnvironment environment, System.IServiceProvider serviceProvider, OmniSharp.CompositionHostBuilder compositionHostBuilder, Microsoft.Extensions.Logging.ILoggerFactory loggerFactory, System.Threading.CancellationTokenSource cancellationTokenSource) [0x00070] in <3cc12c7c00f344b08c42dfac73970669>:0 at OmniSharp.Stdio.Driver.Program+<>c__DisplayClass0_1.<Main>b__1 () [0x00138] in <0a1d4b17e42e41ff8dffd9ad6b26ea3a>:0 at OmniSharp.CommandLineApplication+<>c__DisplayClass11_0.<OnExecute>b__0 () [0x0000b] in <26e431e77bba4574aea35bb4bb3374a8>:0 at McMaster.Extensions.CommandLineUtils.CommandLineApplication.Execute (System.String[] args) [0x00039] in <344a1e8cd6594b17b1e01f8df6ae8827>:0 at OmniSharp.CommandLineApplication.Execute (System.Collections.Generic.IEnumerable1[T] args) [0x00042] in <26e431e77bba4574aea35bb4bb3374a8>:0
at OmniSharp.Stdio.Driver.Program+<>c__DisplayClass0_0.

b__0 () [0x00028] in <0a1d4b17e42e41ff8dffd9ad6b26ea3a>:0
at OmniSharp.HostHelpers.Start (System.Func`1[TResult] action) [0x0001c] in <26e431e77bba4574aea35bb4bb3374a8>:0

C# log

Post the output from Output-->C# here

Environment information

VSCode version: 1.38.0
C# Extension: 1.21.2

Mono Information
OmniSharp using built-in mono

Dotnet Information
.NET Core SDK (reflecting any global.json):
Version: 2.2.402
Commit: c7f2f96116

Runtime Environment:
OS Name: Mac OS X
OS Version: 10.14
OS Platform: Darwin
RID: osx.10.14-x64
Base Path: /usr/local/share/dotnet/sdk/2.2.402/

Host (useful for support):
Version: 3.0.0-preview9-19423-09
Commit: 2be172345a

.NET Core SDKs installed:
2.0.0 [/usr/local/share/dotnet/sdk]
2.1.3 [/usr/local/share/dotnet/sdk]
2.1.302 [/usr/local/share/dotnet/sdk]
2.1.403 [/usr/local/share/dotnet/sdk]
2.2.103 [/usr/local/share/dotnet/sdk]
2.2.104 [/usr/local/share/dotnet/sdk]
2.2.402 [/usr/local/share/dotnet/sdk]

.NET Core runtimes installed:
Microsoft.AspNetCore.All 2.1.2 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.1.5 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.2.1 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.2.2 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.2.7 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All]
Microsoft.AspNetCore.App 2.1.2 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.1.5 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.2.1 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.2.2 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.2.7 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 2.0.0 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 2.0.4 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 2.1.2 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 2.1.5 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 2.2.1 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 2.2.2 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 2.2.7 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]

To install additional .NET Core runtimes or SDKs:
https://aka.ms/dotnet-download


Visual Studio Code Extensions

|Extension|Author|Version|
|---|---|---|
|auto-rename-tag|formulahendry|0.1.0|
|code-spell-checker|streetsidesoftware|1.7.18|
|csharp|ms-vscode|1.21.2|
|npm-intellisense|christian-kohler|1.3.0|
|prettier-vscode|esbenp|2.2.2|
|rainbow-csv|mechatroner|1.3.1|
|relativepath|john681611|0.1.2|
|sublime-keybindings|ms-vscode|4.0.3|
|vscode-eslint|dbaeumer|1.9.1|
|vscode-icons|vscode-icons-team|9.3.0|
|vscode-nuget-package-manager|jmrog|1.1.6|;

picture mattheworres

Most helpful comment

or try removing "omnisharp.path": "latest" from the settings

picture filipw on 11 Sep 2019
👍6

All 6 comments

cc @NTaylorMullen

filipw picture filipw on 11 Sep 2019

Looks like I'm a whole major version behind on Mono? Coworker has the latest 5.x and Omnisharp is working a-OK, so I'm currently upgrading Mono on my machine to see if this resolves the issue.

mattheworres picture mattheworres on 11 Sep 2019

Unfortunately no, I can reproduce the issue even while I see any Mono-related paths to the 6.0.0 version I installed and updated, so that does not remedy my issue.

mattheworres picture mattheworres on 11 Sep 2019

Hmm, i see you're using a beta O#. The latest O# version may not align properly with the latest Razor, meaning it's possible that Razor expects Roslyn version XYZ but latest O# depends on Roslyn version ABC. Only way to fix this would be to download the beta VSIX and manually install it instead of dynamically acquiring just the language server.

NTaylorMullen picture NTaylorMullen on 11 Sep 2019

or try removing "omnisharp.path": "latest" from the settings

filipw picture filipw on 11 Sep 2019
👍6

@filipw thanks! that must've done it, i saw that beta25 was specified in my settings.json, as soon as I deleted that, it asked if I wanted to restart O#, I did, and it's back to working again.

Thanks!

mattheworres picture mattheworres on 12 Sep 2019
👍1
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