vscode-csharp: OmniSharp stops working after Mono is installed.

Environment data

.NET Command Line Tools (2.1.3)

Product Information:
 Version:            2.1.3
 Commit SHA-1 hash:  a0ca411ca5

Runtime Environment:
 OS Name:     gentoo
 OS Version:  
 OS Platform: Linux
 RID:         linux-x64
 Base Path:   /opt/dotnet_core/sdk/2.1.3/

Microsoft .NET Core Shared Framework Host

  Version  : 2.0.4
  Build    : 7f262f453d8c8479b9af91d34c013b3aa05bc1ff

VS Code version: 1.20.0-1516947444 C# Extension version: 1.13.1

Steps to reproduce

Install the .NET Core SDK without Mono and a fresh install of VSCode. Open up a C# project and verify that extension functionality works.

Install Mono alongside the dotnet tool. Try opening the same project in VSCode.

Install MSBuild for Mono since the OmniSharp warning suggests to do so. Try opening the same project in VSCode.

Expected behavior

Intellisense, CodeLens, etc. works in all three scenarios. After installing MSBuild, the warning that it is not installed goes away.

Actual behavior

Intellisense, CodeLens, etc. only work in the case where .NET Core is installed without Mono or Mono MSBuild. The warning that MSBuild is not installed remains after it is installed alongside Mono.

Starting OmniSharp server at 2/2/2018, 12:25:16 AM
    Target: /home/jaccarmac/src/src/jaccarmac.com/junkcode/free-monad-vs-typeclass

OmniSharp server started wth Mono
    Path: /home/jaccarmac/.vscode-insiders/extensions/ms-vscode.csharp-1.13.1/.omnisharp/omnisharp/OmniSharp.exe
    PID: 20413

[info]: OmniSharp.Stdio.Host
        Starting OmniSharp on gentoo 0.0 (x64)
[warn]: OmniSharp.MSBuild.Discovery.Providers.MonoInstanceProvider
        It looks like you have Mono 5.2.0 or greater installed but MSBuild could not be found.
Try installing MSBuild into Mono (e.g. 'sudo apt-get install msbuild') to enable better MSBuild support.
[info]: OmniSharp.MSBuild.Discovery.MSBuildLocator
        Located 1 MSBuild instance(s)
            1: StandAlone 15.0 - "/home/jaccarmac/.vscode-insiders/extensions/ms-vscode.csharp-1.13.1/.omnisharp/omnisharp/msbuild/15.0/Bin"
[info]: OmniSharp.MSBuild.Discovery.MSBuildLocator
        MSBUILD_EXE_PATH environment variable set to '/home/jaccarmac/.vscode-insiders/extensions/ms-vscode.csharp-1.13.1/.omnisharp/omnisharp/msbuild/15.0/Bin/MSBuild.dll'
[info]: OmniSharp.MSBuild.Discovery.MSBuildLocator
        Registered MSBuild instance: StandAlone 15.0 - "/home/jaccarmac/.vscode-insiders/extensions/ms-vscode.csharp-1.13.1/.omnisharp/omnisharp/msbuild/15.0/Bin"
            MSBuildExtensionsPath = /usr/lib/mono/xbuild
            CscToolPath = /home/jaccarmac/.vscode-insiders/extensions/ms-vscode.csharp-1.13.1/.omnisharp/omnisharp/msbuild/15.0/Bin/Roslyn
            CscToolExe = csc.exe
            MSBuildToolsPath = /home/jaccarmac/.vscode-insiders/extensions/ms-vscode.csharp-1.13.1/.omnisharp/omnisharp/msbuild/15.0/Bin
            TargetFrameworkRootPath = /usr/lib/mono/xbuild-frameworks
[info]: OmniSharp.Cake.CakeProjectSystem
        Detecting Cake files in '/home/jaccarmac/src/src/jaccarmac.com/junkcode/free-monad-vs-typeclass'.
[info]: OmniSharp.Cake.CakeProjectSystem
        Could not find any Cake files
[info]: OmniSharp.DotNet.DotNetProjectSystem
        Initializing in /home/jaccarmac/src/src/jaccarmac.com/junkcode/free-monad-vs-typeclass
[info]: OmniSharp.DotNet.DotNetProjectSystem
        Auto package restore: False
[info]: OmniSharp.DotNet.DotNetProjectSystem
        Update workspace context
[info]: OmniSharp.DotNet.DotNetProjectSystem
        Resolving projects references
[info]: OmniSharp.MSBuild.MSBuildProjectSystem
        No solution files found in '/home/jaccarmac/src/src/jaccarmac.com/junkcode/free-monad-vs-typeclass'
[info]: OmniSharp.MSBuild.MSBuildProjectSystem
        Loading project: /home/jaccarmac/src/src/jaccarmac.com/junkcode/free-monad-vs-typeclass/free-monad-vs-typeclass.csproj
[warn]: OmniSharp.MSBuild.MSBuildProjectSystem
        Failed to load project file '/home/jaccarmac/src/src/jaccarmac.com/junkcode/free-monad-vs-typeclass/free-monad-vs-typeclass.csproj'.
/home/jaccarmac/src/src/jaccarmac.com/junkcode/free-monad-vs-typeclass/free-monad-vs-typeclass.csproj(1,1)
Microsoft.Build.Exceptions.InvalidProjectFileException: The imported project "/usr/lib/mono/xbuild/15.0/Microsoft.Common.props" was not found. Confirm that the path in the <Import> declaration is correct, and that the file exists on disk.  /opt/dotnet_core/sdk/2.1.3/Sdks/Microsoft.NET.Sdk/Sdk/Sdk.props
  at Microsoft.Build.Shared.ProjectErrorUtilities.ThrowInvalidProject (System.String errorSubCategoryResourceName, Microsoft.Build.Shared.IElementLocation elementLocation, System.String resourceName, System.Object[] args) [0x00042] in <9ba305957e954df9b0ed46d97ba8f5be>:0 
  at Microsoft.Build.Shared.ProjectErrorUtilities.VerifyThrowInvalidProject[T1] (System.Boolean condition, System.String errorSubCategoryResourceName, Microsoft.Build.Shared.IElementLocation elementLocation, System.String resourceName, T1 arg0) [0x00003] in <9ba305957e954df9b0ed46d97ba8f5be>:0 
  at Microsoft.Build.Shared.ProjectErrorUtilities.ThrowInvalidProject[T1] (Microsoft.Build.Shared.IElementLocation elementLocation, System.String resourceName, T1 arg0) [0x00000] in <9ba305957e954df9b0ed46d97ba8f5be>:0 
  at Microsoft.Build.Evaluation.Evaluator`4[P,I,M,D].ExpandAndLoadImportsFromUnescapedImportExpression (System.String directoryOfImportingFile, Microsoft.Build.Construction.ProjectImportElement importElement, System.String unescapedExpression, System.Boolean throwOnFileNotExistsError, System.Collections.Generic.List`1[Microsoft.Build.Construction.ProjectRootElement]& imports) [0x00517] in <9ba305957e954df9b0ed46d97ba8f5be>:0 
  at Microsoft.Build.Evaluation.Evaluator`4[P,I,M,D].ExpandAndLoadImportsFromUnescapedImportExpressionConditioned (System.String directoryOfImportingFile, Microsoft.Build.Construction.ProjectImportElement importElement, System.Collections.Generic.List`1[Microsoft.Build.Construction.ProjectRootElement]& projects, System.Boolean throwOnFileNotExistsError) [0x001a6] in <9ba305957e954df9b0ed46d97ba8f5be>:0 
  at Microsoft.Build.Evaluation.Evaluator`4[P,I,M,D].ExpandAndLoadImports (System.String directoryOfImportingFile, Microsoft.Build.Construction.ProjectImportElement importElement) [0x00024] in <9ba305957e954df9b0ed46d97ba8f5be>:0 
  at Microsoft.Build.Evaluation.Evaluator`4[P,I,M,D].EvaluateImportElement (System.String directoryOfImportingFile, Microsoft.Build.Construction.ProjectImportElement importElement) [0x00000] in <9ba305957e954df9b0ed46d97ba8f5be>:0 
  at Microsoft.Build.Evaluation.Evaluator`4[P,I,M,D].PerformDepthFirstPass (Microsoft.Build.Construction.ProjectRootElement currentProjectOrImport) [0x001dd] in <9ba305957e954df9b0ed46d97ba8f5be>:0 
  at Microsoft.Build.Evaluation.Evaluator`4[P,I,M,D].EvaluateImportElement (System.String directoryOfImportingFile, Microsoft.Build.Construction.ProjectImportElement importElement) [0x0002d] in <9ba305957e954df9b0ed46d97ba8f5be>:0 
  at Microsoft.Build.Evaluation.Evaluator`4[P,I,M,D].PerformDepthFirstPass (Microsoft.Build.Construction.ProjectRootElement currentProjectOrImport) [0x000c8] in <9ba305957e954df9b0ed46d97ba8f5be>:0 
  at Microsoft.Build.Evaluation.Evaluator`4[P,I,M,D].Evaluate (Microsoft.Build.BackEnd.Logging.ILoggingService loggingService, Microsoft.Build.Framework.BuildEventContext buildEventContext) [0x000df] in <9ba305957e954df9b0ed46d97ba8f5be>:0 
  at Microsoft.Build.Evaluation.Evaluator`4[P,I,M,D].Evaluate (Microsoft.Build.Evaluation.IEvaluatorData`4[P,I,M,D] data, Microsoft.Build.Construction.ProjectRootElement root, Microsoft.Build.Evaluation.ProjectLoadSettings loadSettings, System.Int32 maxNodeCount, Microsoft.Build.Collections.PropertyDictionary`1[T] environmentProperties, Microsoft.Build.BackEnd.Logging.ILoggingService loggingService, Microsoft.Build.Evaluation.IItemFactory`2[S,T] itemFactory, Microsoft.Build.Evaluation.IToolsetProvider toolsetProvider, Microsoft.Build.Evaluation.ProjectRootElementCache projectRootElementCache, Microsoft.Build.Framework.BuildEventContext buildEventContext, Microsoft.Build.Execution.ProjectInstance projectInstanceIfAnyForDebuggerOnly, Microsoft.Build.BackEnd.SdkResolution sdkResolution) [0x00016] in <9ba305957e954df9b0ed46d97ba8f5be>:0 
  at Microsoft.Build.Evaluation.Project.Reevaluate (Microsoft.Build.BackEnd.Logging.ILoggingService loggingServiceForEvaluation, Microsoft.Build.Evaluation.ProjectLoadSettings loadSettings) [0x0004c] in <9ba305957e954df9b0ed46d97ba8f5be>:0 
  at Microsoft.Build.Evaluation.Project.ReevaluateIfNecessary (Microsoft.Build.BackEnd.Logging.ILoggingService loggingServiceForEvaluation, Microsoft.Build.Evaluation.ProjectLoadSettings loadSettings) [0x00034] in <9ba305957e954df9b0ed46d97ba8f5be>:0 
  at Microsoft.Build.Evaluation.Project.ReevaluateIfNecessary (Microsoft.Build.BackEnd.Logging.ILoggingService loggingServiceForEvaluation) [0x00000] in <9ba305957e954df9b0ed46d97ba8f5be>:0 
  at Microsoft.Build.Evaluation.Project.ReevaluateIfNecessary () [0x00007] in <9ba305957e954df9b0ed46d97ba8f5be>:0 
  at Microsoft.Build.Evaluation.Project.Initialize (System.Collections.Generic.IDictionary`2[TKey,TValue] globalProperties, System.String toolsVersion, System.String subToolsetVersion, Microsoft.Build.Evaluation.ProjectLoadSettings loadSettings) [0x000e9] in <9ba305957e954df9b0ed46d97ba8f5be>:0 
  at Microsoft.Build.Evaluation.Project..ctor (System.String projectFile, System.Collections.Generic.IDictionary`2[TKey,TValue] globalProperties, System.String toolsVersion, System.String subToolsetVersion, Microsoft.Build.Evaluation.ProjectCollection projectCollection, Microsoft.Build.Evaluation.ProjectLoadSettings loadSettings) [0x0009c] in <9ba305957e954df9b0ed46d97ba8f5be>:0 
  at Microsoft.Build.Evaluation.Project..ctor (System.String projectFile, System.Collections.Generic.IDictionary`2[TKey,TValue] globalProperties, System.String toolsVersion, Microsoft.Build.Evaluation.ProjectCollection projectCollection, Microsoft.Build.Evaluation.ProjectLoadSettings loadSettings) [0x00000] in <9ba305957e954df9b0ed46d97ba8f5be>:0 
  at Microsoft.Build.Evaluation.Project..ctor (System.String projectFile, System.Collections.Generic.IDictionary`2[TKey,TValue] globalProperties, System.String toolsVersion, Microsoft.Build.Evaluation.ProjectCollection projectCollection) [0x00000] in <9ba305957e954df9b0ed46d97ba8f5be>:0 
  at Microsoft.Build.Evaluation.ProjectCollection.LoadProject (System.String fileName, System.Collections.Generic.IDictionary`2[TKey,TValue] globalProperties, System.String toolsVersion) [0x000f5] in <9ba305957e954df9b0ed46d97ba8f5be>:0 
  at Microsoft.Build.Evaluation.ProjectCollection.LoadProject (System.String fileName, System.String toolsVersion) [0x00000] in <9ba305957e954df9b0ed46d97ba8f5be>:0 
  at OmniSharp.MSBuild.ProjectFile.ProjectFileInfo.LoadProject (System.String filePath, System.String solutionDirectory, Microsoft.Extensions.Logging.ILogger logger, OmniSharp.MSBuild.Discovery.MSBuildInstance msbuildInstance, OmniSharp.MSBuild.SdksPathResolver sdksPathResolver, OmniSharp.Options.MSBuildOptions options, System.Collections.Generic.ICollection`1[T] diagnostics, System.Collections.Immutable.ImmutableArray`1[System.String]& targetFrameworks) [0x00054] in <e904597b17e840d49e5c532b51773be0>:0 
  at OmniSharp.MSBuild.ProjectFile.ProjectFileInfo.Create (System.String filePath, System.String solutionDirectory, Microsoft.Extensions.Logging.ILogger logger, OmniSharp.MSBuild.Discovery.MSBuildInstance msbuildInstance, OmniSharp.MSBuild.SdksPathResolver sdksPathResolver, OmniSharp.Options.MSBuildOptions options, System.Collections.Generic.ICollection`1[T] diagnostics) [0x0000a] in <e904597b17e840d49e5c532b51773be0>:0 
  at OmniSharp.MSBuild.MSBuildProjectSystem.LoadProject (System.String projectFilePath) [0x00038] in <e904597b17e840d49e5c532b51773be0>:0 

[info]: OmniSharp.Script.ScriptProjectSystem
        Detecting CSX files in '/home/jaccarmac/src/src/jaccarmac.com/junkcode/free-monad-vs-typeclass'.
[info]: OmniSharp.Script.ScriptProjectSystem
        Could not find any CSX files
[info]: OmniSharp.Stdio.Host
        Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.CSharpWorkspaceOptionsProvider
[info]: OmniSharp.Stdio.Host
        Configuration finished.
[info]: OmniSharp.Stdio.Host
        Omnisharp server running using Stdio at location '/home/jaccarmac/src/src/jaccarmac.com/junkcode/free-monad-vs-typeclass' on host 18205.

About this issue

Original URL
State: closed
Created 6 years ago
Reactions: 11
Comments: 55 (14 by maintainers)

Most upvoted comments

I’m on arch solved this issue by uninstall “msbuild-bin” and install “msbuild-stable” (15.4_xamarinxplat.2017.11.27.11.23_0xamarin1_ubuntu1404b1-3) instead.

+16

sekseason on Apr 11, 2018

Could you try setting “omnisharp.useGlobalMono”: never and then restarting the omnisharp server.

akshita31 on May 28, 2019

AAAARGH! Of course, I’m so sorry, I should have known better. Installed mono from the mono apt repo at https://www.mono-project.com/download/stable/ and all is good again!!

Thanks so much for your help, Filip!

fergalmoran on Oct 4, 2019

After uninstalling mono on arch, you have to reinstall the 3 dotnet packages. (host, runtime, sdk)

Alumniminium on Apr 3, 2018

On fedora, after installing mono-complete (5.14.0.177) from the mono repo (mono-centos7-stable) I had this error. It was resolved after installing the msbuild package from the same repo (sudo dnf install msbuild)

dwarburt on Sep 15, 2018

I think I’ve worked out what the problem is. Mono provide a package called msbuild, currently version 1:15.4+xamarinxplat.2017.11.27.11.23-0xamarin1+ubuntu1404b1. It isn’t a dependency of mono-devel, so it doesn’t get installed if you install mono in the recommended way. (It is a dependency of mono-complete.)

Installing this package prevents the error. At this point I’m speculating, but perhaps if Mono is installed, Omnisharp tries to use it, and then fails because msbuild is missing.

I’m running Ubuntu (16.04) so your fix may be slightly different if you’re on a different distro.

PeteX on Feb 7, 2018

Also a word of explanation - the reason why latest Omnisharp suddenly requires Mono 6.4.0 is that this is the version of Mono that supports .NET Core 3.0 (or rather contains msbuild 16.3 that supports .NET Core 3.0). Unfortunately the rules of minimum Mono versions are not very well enforced in the code at the moment, so OmniSharp can still pick up an older one and that results in potential problems.

filipw on Oct 4, 2019

mono-complete is the superset of mono-devel so it’s fine. However OmniSharp now requires at least Mono 6.4.0 - it would be best to update the installation to that version (that’s actually the latest stable). The problem is that even if OmiSharp runs standalone mode and doesn’t use global mono, some of the msbuild extension paths and such will still be inherited from mono therefore if it’s an old version things might start breaking down.

filipw on Oct 4, 2019

@akshita31 Is there any update on this issue, or do I need to open a new one? Even with the latest 3.0 SDK installed, Omnisharp still doesn’t work, failing with the same error around Microsoft.Common.props

Same here… Omnisharp seems to break for me every couple of months.

fergalmoran on Oct 4, 2019

I’m on Solus, and after I installed the mono-msbuild package from my system package manager, I’m experiencing similar problems but with different errors. Installing that system package “permanently” broke Omnisharp. Permanently, meaning something got set that isn’t being unset when the package is removed.

I believe it may be related so I didn’t want to start a new issue, but if I need to, let me know. I receive the error at the bottom of this comment.

Even after reverting my development system back to how it was initially, it’s still trying to load system mono instead of the one supplied by omnisharp. I did the following:

Uninstalled system mono-msbuild 15.8
Uninstalled system mono 5.14.0.177
Uninstalled all C# extensions
Uninstalled 3.0.100-preview3-010431
Uninstalled vscode
Reinstalled system mono, did not install mono-msbuild (at this point my system should be where it was initially)
Reinstalled dotnet core snap, vs code, c# extension

I still receive the same error every time VSCode starts up. I can no longer have mono installed on my system at all.

Before installing mono-msbuild from my package manager, I was getting the error mentioned in #2876, so even though it was broken at that point, it was at least looking in the right place for mono. Now it isn’t.

If I completely remove my system mono package, I get back to where I was with issue #2876, even though the problem started when I installed system mono-msbuild, which is no longer installed.

Hopefully my log will be of some help. If anyone has any ideas how I can get mono reinstalled without interfering with omnisharp, I’m all ears.

Starting OmniSharp server at 3/20/2019, 8:49:59 AM
    Target: /home/adam/Source/internalproject

OmniSharp server started with Mono 5.14.0.
    Path: /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/OmniSharp.exe
    PID: 8362

[info]: OmniSharp.Stdio.Host
        Starting OmniSharp on solus 4.0 (x64)
[info]: OmniSharp.Services.DotNetCliService
        DotNetPath set to dotnet
Stacktrace:

  at <unknown> <0xffffffff>
  at (wrapper managed-to-native) OmniSharp.Utilities.PlatformHelper.Unix_free (intptr) [0x00002] in <182b3548f60947fcafa19b5fd56515a0>:0
  at OmniSharp.Utilities.PlatformHelper.RealPath (string) [0x0002d] in <182b3548f60947fcafa19b5fd56515a0>:0
  at OmniSharp.Utilities.PlatformHelper.GetMonoRuntimePath () [0x00050] in <182b3548f60947fcafa19b5fd56515a0>:0
  at OmniSharp.MSBuild.Discovery.Providers.MonoInstanceProvider.GetInstances () [0x0000d] in <ec3b9b744cc24b97b94be13e30b9e41f>:0
  at OmniSharp.MSBuild.Discovery.MSBuildLocator.GetInstances () [0x0001e] in <ec3b9b744cc24b97b94be13e30b9e41f>:0
  at OmniSharp.MSBuild.Discovery.Extensions.RegisterDefaultInstance (OmniSharp.MSBuild.Discovery.IMSBuildLocator,Microsoft.Extensions.Logging.ILogger) [0x00004] in <ec3b9b744cc24b97b94be13e30b9e41f>:0
  at OmniSharp.CompositionHostBuilder.Build () [0x0008b] in <ec3b9b744cc24b97b94be13e30b9e41f>:0
  at OmniSharp.Stdio.Host..ctor (System.IO.TextReader,OmniSharp.Stdio.Services.ISharedTextWriter,OmniSharp.IOmniSharpEnvironment,System.IServiceProvider,OmniSharp.CompositionHostBuilder,Microsoft.Extensions.Logging.ILoggerFactory,System.Threading.CancellationTokenSource) [0x00057] in <35cdcec6f502484d8825e1fc7493c665>:0
  at OmniSharp.Stdio.Driver.Program/<>c__DisplayClass0_1.<Main>b__1 () [0x00138] in <22c463206460470eafd215b3bb7ab1cd>:0
  at OmniSharp.CommandLineApplication/<>c__DisplayClass11_0.<OnExecute>b__0 () [0x0000b] in <ec3b9b744cc24b97b94be13e30b9e41f>:0
  at McMaster.Extensions.CommandLineUtils.CommandLineApplication.Execute (string[]) [0x00039] in <344a1e8cd6594b17b1e01f8df6ae8827>:0
  at OmniSharp.CommandLineApplication.Execute (System.Collections.Generic.IEnumerable`1<string>) [0x00042] in <ec3b9b744cc24b97b94be13e30b9e41f>:0
  at OmniSharp.Stdio.Driver.Program/<>c__DisplayClass0_0.<Main>b__0 () [0x00028] in <22c463206460470eafd215b3bb7ab1cd>:0
  at OmniSharp.HostHelpers.Start (System.Func`1<int>) [0x0001c] in <ec3b9b744cc24b97b94be13e30b9e41f>:0
  at OmniSharp.Stdio.Driver.Program.Main (string[]) [0x00005] in <22c463206460470eafd215b3bb7ab1cd>:0
  at (wrapper runtime-invoke) <Module>.runtime_invoke_int_object (object,intptr,intptr,intptr) [0x00054] in <22c463206460470eafd215b3bb7ab1cd>:0
/proc/self/maps:
00400000-00418000 r--p 00000000 103:03 23107333                          /usr/bin/mono-sgen
00418000-006f6000 r-xp 00018000 103:03 23107333                          /usr/bin/mono-sgen
006f6000-00817000 r--p 002f6000 103:03 23107333                          /usr/bin/mono-sgen
00817000-0081f000 r--p 00416000 103:03 23107333                          /usr/bin/mono-sgen
0081f000-00823000 rw-p 0041e000 103:03 23107333                          /usr/bin/mono-sgen
00823000-00839000 rw-p 00000000 00:00 0 
02251000-02b0d000 rw-p 00000000 00:00 0                                  [heap]
4138c000-4139c000 rwxp 00000000 00:00 0 
41fd7000-420f1000 rwxp 00000000 00:00 0 
7fedf8000000-7fedf8021000 rw-p 00000000 00:00 0 
7fedf8021000-7fedfc000000 ---p 00000000 00:00 0 
7fedffafb000-7fedffdfd000 r--p 00000000 103:03 26223857                  /usr/lib64/mono/gac/System.Xml/4.0.0.0__b77a5c561934e089/System.Xml.dll
7fedffdfd000-7fee00000000 r--p 00000000 103:03 25565809                  /usr/lib64/mono/gac/System.Data/4.0.0.0__b77a5c561934e089/System.Data.dll
7fee00000000-7fee00021000 rw-p 00000000 00:00 0 
7fee00021000-7fee04000000 ---p 00000000 00:00 0 
7fee04000000-7fee0404d000 rw-p 00000000 00:00 0 
7fee0404d000-7fee08000000 ---p 00000000 00:00 0 
7fee08000000-7fee08050000 rw-p 00000000 00:00 0 
7fee08050000-7fee0c000000 ---p 00000000 00:00 0 
7fee0c000000-7fee0c021000 rw-p 00000000 00:00 0 
7fee0c021000-7fee10000000 ---p 00000000 00:00 0 
7fee10000000-7fee10021000 rw-p 00000000 00:00 0 
7fee10021000-7fee14000000 ---p 00000000 00:00 0 
7fee14000000-7fee1437e000 rw-p 00000000 00:00 0 
7fee1437e000-7fee18000000 ---p 00000000 00:00 0 
7fee18000000-7fee18021000 rw-p 00000000 00:00 0 
7fee18021000-7fee1c000000 ---p 00000000 00:00 0 
7fee1c16f000-7fee1c1b9000 r--p 00000000 103:03 21236250                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/System.Collections.Immutable.dll
7fee1c1b9000-7fee1c1ba000 rw-p 00000000 00:00 0 
7fee1c1ba000-7fee1c1ca000 rwxp 00000000 00:00 0 
7fee1c1ca000-7fee1c1d8000 r--p 00000000 103:03 21236087                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/NuGet.Versioning.dll
7fee1c1d8000-7fee1c2bc000 r--p 00000000 103:03 25828019                  /usr/lib64/mono/gac/System.Runtime.Serialization/4.0.0.0__b77a5c561934e089/System.Runtime.Serialization.dll
7fee1c2bc000-7fee1c555000 r--p 00000000 103:03 21235532                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/Microsoft.CodeAnalysis.dll
7fee1c555000-7fee1c55b000 r--p 00000000 103:03 21236253                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/System.Collections.dll
7fee1c55b000-7fee1c561000 r--p 00000000 103:03 21236336                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/System.Threading.dll
7fee1c561000-7fee1c568000 r--p 00000000 103:03 21236256                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/System.Composition.AttributedModel.dll
7fee1c568000-7fee1c578000 r--p 00000000 103:03 21236260                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/System.Composition.TypedParts.dll
7fee1c578000-7fee1c5a2000 r--p 00000000 103:03 21236232                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/OmniSharp.Roslyn.CSharp.dll
7fee1c5a2000-7fee1c5b4000 r--p 00000000 103:03 21236228                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/OmniSharp.MSBuild.dll
7fee1c5b4000-7fee1c5c1000 r--p 00000000 103:03 21236096                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/OmniSharp.DotNetTest.dll
7fee1c5c1000-7fee1c5ca000 r--p 00000000 103:03 21236094                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/OmniSharp.DotNet.dll
7fee1c5ca000-7fee1c5ec000 r--p 00000000 103:03 23228411                  /usr/lib64/libc-2.29.so
7fee1c5ec000-7fee1c75e000 r-xp 00022000 103:03 23228411                  /usr/lib64/libc-2.29.so
7fee1c75e000-7fee1c7aa000 r--p 00194000 103:03 23228411                  /usr/lib64/libc-2.29.so
7fee1c7aa000-7fee1c7ab000 ---p 001e0000 103:03 23228411                  /usr/lib64/libc-2.29.so
7fee1c7ab000-7fee1c7af000 r--p 001e0000 103:03 23228411                  /usr/lib64/libc-2.29.so
7fee1c7af000-7fee1c7b1000 rw-p 001e4000 103:03 23228411                  /usr/lib64/libc-2.29.so
7fee1c7b1000-7fee1c7b5000 rw-p 00000000 00:00 0 
7fee1c7b5000-7fee1c857000 r--p 00000000 103:03 21236077                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/Newtonsoft.Json.dll
7fee1c857000-7fee1caff000 r--p 00000000 103:03 21235531                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/Microsoft.CodeAnalysis.Workspaces.dll
7fee1caff000-7fee1cb00000 ---p 00000000 00:00 0 
7fee1cb00000-7fee1cb01000 rw-p 00000000 00:00 0 
7fee1cb01000-7fee1cb09000 ---p 00000000 00:00 0 
7fee1cb09000-7fee1ce00000 rw-p 00000000 00:00 0 
7fee1ce00000-7fee1ce07000 r--p 00000000 103:03 21236236                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/OmniSharp.Script.dll
7fee1ce07000-7fee1ce1a000 r--p 00000000 103:03 21236090                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/OmniSharp.Cake.dll
7fee1ce1a000-7fee1ce20000 r--p 00000000 103:03 21235533                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/Microsoft.DotNet.PlatformAbstractions.dll
7fee1ce20000-7fee1ce3f000 r--p 00000000 103:03 25691462                  /usr/lib64/mono/gac/System.Numerics/4.0.0.0__b77a5c561934e089/System.Numerics.dll
7fee1ce3f000-7fee1ce4f000 r--p 00000000 103:03 21235558                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/Microsoft.Extensions.DependencyModel.dll
7fee1ce4f000-7fee1ce5f000 r--p 00000000 103:03 21236234                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/OmniSharp.Roslyn.dll
7fee1ce5f000-7fee1ce66000 r--p 00000000 103:03 21235537                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/Microsoft.Extensions.Configuration.Binder.dll
7fee1ce66000-7fee1ce6b000 r--p 00000000 103:03 21236064                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/Microsoft.Extensions.Options.ConfigurationExtensions.dll
7fee1ce6b000-7fee1ce75000 r--p 00000000 103:03 21236065                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/Microsoft.Extensions.Options.dll
7fee1ce75000-7fee1ce7d000 r--p 00000000 103:03 21235535                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/Microsoft.Extensions.Caching.Memory.dll
7fee1ce7d000-7fee1ce84000 r--p 00000000 103:03 21235534                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/Microsoft.Extensions.Caching.Abstractions.dll
7fee1ce84000-7fee1ce8c000 rw-p 00000000 00:00 0 
7fee1ce8c000-7fee1ce8d000 ---p 00000000 00:00 0 
7fee1ce8d000-7fee1ce8e000 rw-p 00000000 00:00 0 
7fee1ce8e000-7fee1ce96000 ---p 00000000 00:00 0 
7fee1ce96000-7fee1d091000 rw-p 00000000 00:00 0 
7fee1d091000-7fee1d092000 ---p 00000000 00:00 0 
7fee1d092000-7fee1d093000 rw-p 00000000 00:00 0 
7fee1d093000-7fee1d09b000 ---p 00000000 00:00 0 
7fee1d09b000-7fee1d296000 rw-p 00000000 00:00 0 
7fee1d296000-7fee1d297000 ---p 00000000 00:00 0 
7fee1d297000-7fee1d298000 rw-p 00000000 00:00 0 
7fee1d298000-7fee1d2a0000 ---p 00000000 00:00 0 
7fee1d2a0000-7fee1d49b000 rw-p 00000000 00:00 0 
7fee1d49b000-7fee1d49c000 ---p 00000000 00:00 0 
7fee1d49c000-7fee1d49d000 rw-p 00000000 00:00 0 
7fee1d49d000-7fee1d4a5000 ---p 00000000 00:00 0 
7fee1d4a5000-7fee1d6a0000 rw-p 00000000 00:00 0 
7fee1d6a0000-7fee1d6a1000 ---p 00000000 00:00 0 
7fee1d6a1000-7fee1d6a2000 rw-p 00000000 00:00 0 
7fee1d6a2000-7fee1d6aa000 ---p 00000000 00:00 0 
7fee1d6aa000-7fee1d8a1000 rw-p 00000000 00:00 0 
7fee1d8a1000-7fee1d8a7000 r--p 00000000 103:03 21235541                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/Microsoft.Extensions.Configuration.Json.dll
7fee1d8a7000-7fee1d8ac000 r--p 00000000 103:03 21235538                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/Microsoft.Extensions.Configuration.CommandLine.dll
7fee1d8ac000-7fee1d8b1000 r--p 00000000 103:03 21235539                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/Microsoft.Extensions.Configuration.EnvironmentVariables.dll
7fee1d8b1000-7fee1d8bb000 r--p 00000000 103:03 21235747                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/Microsoft.Extensions.FileSystemGlobbing.dll
7fee1d8bb000-7fee1d8c4000 r--p 00000000 103:03 21236069                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/Microsoft.Extensions.Primitives.dll
7fee1d8c4000-7fee1d8c9000 r--p 00000000 103:03 21235743                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/Microsoft.Extensions.FileProviders.Abstractions.dll
7fee1d8c9000-7fee1d8d1000 r--p 00000000 103:03 21235745                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/Microsoft.Extensions.FileProviders.Physical.dll
7fee1d8d1000-7fee1d8d7000 r--p 00000000 103:03 21235540                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/Microsoft.Extensions.Configuration.FileExtensions.dll
7fee1d8d7000-7fee1d8de000 r--p 00000000 103:03 21235542                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/Microsoft.Extensions.Configuration.dll
7fee1d8de000-7fee1d92a000 r--p 00000000 103:03 24128144                  /usr/lib64/mono/gac/Mono.Security/4.0.0.0__0738eb9f132ed756/Mono.Security.dll
7fee1d92a000-7fee1d948000 r--p 00000000 103:03 25043018                  /usr/lib64/mono/gac/System.Configuration/4.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll
7fee1d948000-7fee1d950000 r--p 00000000 103:03 21236063                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/Microsoft.Extensions.Logging.dll
7fee1d950000-7fee1d958000 r--p 00000000 103:03 21236319                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/System.Runtime.dll
7fee1d958000-7fee1d960000 r--p 00000000 103:03 21236259                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/System.Composition.Runtime.dll
7fee1d960000-7fee1d970000 r--p 00000000 103:03 21236258                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/System.Composition.Hosting.dll
7fee1d970000-7fee1d979000 r--p 00000000 103:03 21236098                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/OmniSharp.Extensions.JsonRpc.dll
7fee1d979000-7fee1d998000 r--p 00000000 103:03 21236099                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/OmniSharp.Extensions.LanguageServerProtocol.dll
7fee1d998000-7fee1d9a1000 r--p 00000000 103:03 21235543                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/Microsoft.Extensions.DependencyInjection.Abstractions.dll
7fee1d9a1000-7fee1d9b0000 r--p 00000000 103:03 21235548                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/Microsoft.Extensions.DependencyInjection.dll
7fee1d9b0000-7fee1d9c9000 r--p 00000000 103:03 21236345                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/netstandard.dll
7fee1d9c9000-7fee1d9d5000 r--p 00000000 103:03 21235932                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/Microsoft.Extensions.Logging.Abstractions.dll
7fee1d9d5000-7fee1d9da000 r--p 00000000 103:03 21235536                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/Microsoft.Extensions.Configuration.Abstractions.dll
7fee1d9da000-7fee1dad3000 r--p 00000000 103:03 25043022                  /usr/lib64/mono/gac/System.Core/4.0.0.0__b77a5c561934e089/System.Core.dll
7fee1dad3000-7fee1dd96000 r--p 00000000 103:03 26223861                  /usr/lib64/mono/gac/System/4.0.0.0__b77a5c561934e089/System.dll
7fee1dd96000-7fee1ddab000 r--p 00000000 103:03 24904601                  /usr/lib64/mono/gac/System.ComponentModel.DataAnnotations/4.0.0.0__31bf3856ad364e35/System.ComponentModel.DataAnnotations.dll
7fee1ddab000-7fee1ddac000 ---p 00000000 00:00 0 
7fee1ddac000-7fee1ddad000 rw-p 00000000 00:00 0 
7fee1ddad000-7fee1ddb5000 ---p 00000000 00:00 0 
7fee1ddb5000-7fee1e02d000 rw-p 00000000 00:00 0 
7fee1e02d000-7fee1e3ff000 r--p 00000000 103:03 23359197                  /usr/lib64/mono/4.5/mscorlib.dll
7fee1e3ff000-7fee1f3ff000 rw-p 00000000 00:00 0 
7fee1f3ff000-7fee1f400000 ---p 00000000 00:00 0 
7fee1f400000-7fee20000000 rw-p 00000000 00:00 0 
7fee20000000-7fee20003000 r--p 00000000 103:03 21236230                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/OmniSharp.Plugins.dll
7fee20003000-7fee20012000 r--p 00000000 103:03 21236102                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/OmniSharp.LanguageServerProtocol.dll
7fee20012000-7fee20034000 r--p 00000000 103:03 21235523                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/McMaster.Extensions.CommandLineUtils.dll
7fee20034000-7fee20039000 r--p 00000000 103:03 21236238                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/OmniSharp.Stdio.dll
7fee20039000-7fee20055000 r--p 00000000 103:03 21236088                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/OmniSharp.Abstractions.dll
7fee20055000-7fee20056000 rw-p 00000000 00:00 0 
7fee20056000-7fee200b5000 ---p 00000000 00:00 0 
7fee200b5000-7fee2d056000 r--p 00000000 103:03 24258542                  /usr/lib64/locale/locale-archive
7fee2d056000-7fee2d05b000 rw-p 00000000 00:00 0 
7fee2d05b000-7fee2d07d000 r--p 00000000 103:03 24258534                  /usr/lib64/haswell/libc-2.29.so
7fee2d07d000-7fee2d1ed000 r-xp 00022000 103:03 24258534                  /usr/lib64/haswell/libc-2.29.so
7fee2d1ed000-7fee2d239000 r--p 00192000 103:03 24258534                  /usr/lib64/haswell/libc-2.29.so
7fee2d239000-7fee2d23a000 ---p 001de000 103:03 24258534                  /usr/lib64/haswell/libc-2.29.so
7fee2d23a000-7fee2d23e000 r--p 001de000 103:03 24258534                  /usr/lib64/haswell/libc-2.29.so
7fee2d23e000-7fee2d240000 rw-p 001e2000 103:03 24258534                  /usr/lib64/haswell/libc-2.29.so
7fee2d240000-7fee2d244000 rw-p 00000000 00:00 0 
7fee2d244000-7fee2d247000 r--p 00000000 103:03 23223771                  /usr/lib64/libgcc_s.so.1
7fee2d247000-7fee2d259000 r-xp 00003000 103:03 23223771                  /usr/lib64/libgcc_s.so.1
7fee2d259000-7fee2d25c000 r--p 00015000 103:03 23223771                  /usr/lib64/libgcc_s.so.1
7fee2d25c000-7fee2d25d000 ---p 00018000 103:03 23223771                  /usr/lib64/libgcc_s.so.1
7fee2d25d000-7fee2d25e000 r--p 00018000 103:03 23223771                  /usr/lib64/libgcc_s.so.1
7fee2d25e000-7fee2d25f000 rw-p 00019000 103:03 23223771                  /usr/lib64/libgcc_s.so.1
7fee2d25f000-7fee2d265000 r--p 00000000 103:03 23228424                  /usr/lib64/libpthread-2.29.so
7fee2d265000-7fee2d274000 r-xp 00006000 103:03 23228424                  /usr/lib64/libpthread-2.29.so
7fee2d274000-7fee2d27a000 r--p 00015000 103:03 23228424                  /usr/lib64/libpthread-2.29.so
7fee2d27a000-7fee2d27b000 r--p 0001a000 103:03 23228424                  /usr/lib64/libpthread-2.29.so
7fee2d27b000-7fee2d27c000 rw-p 0001b000 103:03 23228424                  /usr/lib64/libpthread-2.29.so
7fee2d27c000-7fee2d280000 rw-p 00000000 00:00 0 
7fee2d280000-7fee2d281000 r--p 00000000 103:03 23228413                  /usr/lib64/libdl-2.29.so
7fee2d281000-7fee2d283000 r-xp 00001000 103:03 23228413                  /usr/lib64/libdl-2.29.so
7fee2d283000-7fee2d284000 r--p 00003000 103:03 23228413                  /usr/lib64/libdl-2.29.so
7fee2d284000-7fee2d285000 r--p 00003000 103:03 23228413                  /usr/lib64/libdl-2.29.so
7fee2d285000-7fee2d286000 rw-p 00004000 103:03 23228413                  /usr/lib64/libdl-2.29.so
7fee2d286000-7fee2d288000 r--p 00000000 103:03 23228426                  /usr/lib64/librt-2.29.so
7fee2d288000-7fee2d28c000 r-xp 00002000 103:03 23228426                  /usr/lib64/librt-2.29.so
7fee2d28c000-7fee2d28e000 r--p 00006000 103:03 23228426                  /usr/lib64/librt-2.29.so
7fee2d28e000-7fee2d28f000 r--p 00007000 103:03 23228426                  /usr/lib64/librt-2.29.so
7fee2d28f000-7fee2d290000 rw-p 00008000 103:03 23228426                  /usr/lib64/librt-2.29.so
7fee2d290000-7fee2d29d000 r--p 00000000 103:03 24258538                  /usr/lib64/haswell/libm-2.29.so
7fee2d29d000-7fee2d335000 r-xp 0000d000 103:03 24258538                  /usr/lib64/haswell/libm-2.29.so
7fee2d335000-7fee2d3cd000 r--p 000a5000 103:03 24258538                  /usr/lib64/haswell/libm-2.29.so
7fee2d3cd000-7fee2d3ce000 r--p 0013c000 103:03 24258538                  /usr/lib64/haswell/libm-2.29.so
7fee2d3ce000-7fee2d3cf000 rw-p 0013d000 103:03 24258538                  /usr/lib64/haswell/libm-2.29.so
7fee2d3cf000-7fee2d3d2000 rw-p 00000000 00:00 0 
7fee2d3d2000-7fee2d3d3000 rw-p 00000000 00:00 0 
7fee2d3d3000-7fee2d3e2000 r--p 00000000 103:03 21236100                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/OmniSharp.Host.dll
7fee2d3e2000-7fee2d3e4000 r--p 00000000 103:03 21236241                  /home/adam/.vscode/extensions/ms-vscode.csharp-1.17.1/.omnisharp/1.32.8/omnisharp/OmniSharp.exe
7fee2d3e4000-7fee2d3f9000 rw-p 00000000 00:00 0 
7fee2d3f9000-7fee2d3fa000 rw-s 00000000 00:13 189186                     /dev/shm/mono.8362
7fee2d3fa000-7fee2d3fb000 r--p 00000000 103:03 23225062                  /usr/lib64/ld-2.29.so
7fee2d3fb000-7fee2d41b000 r-xp 00001000 103:03 23225062                  /usr/lib64/ld-2.29.so
7fee2d41b000-7fee2d423000 r--p 00021000 103:03 23225062                  /usr/lib64/ld-2.29.so
7fee2d423000-7fee2d424000 r--p 00028000 103:03 23225062                  /usr/lib64/ld-2.29.so
7fee2d424000-7fee2d425000 rw-p 00029000 103:03 23225062                  /usr/lib64/ld-2.29.so
7fee2d425000-7fee2d426000 rw-p 00000000 00:00 0 
7ffec8a48000-7ffec8a50000 ---p 00000000 00:00 0 
7ffec9226000-7ffec9247000 rw-p 00000000 00:00 0                          [stack]
7ffec93e1000-7ffec93e4000 r--p 00000000 00:00 0                          [vvar]
7ffec93e4000-7ffec93e6000 r-xp 00000000 00:00 0                          [vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0                  [vsyscall]

Native stacktrace:

System.NullReferenceException: Object reference not set to an instance of an object
  at (wrapper managed-to-native) OmniSharp.Utilities.PlatformHelper.Unix_free(intptr)
  at OmniSharp.Utilities.PlatformHelper.RealPath (System.String path) [0x0002d] in <182b3548f60947fcafa19b5fd56515a0>:0 
  at OmniSharp.Utilities.PlatformHelper.GetMonoRuntimePath () [0x00050] in <182b3548f60947fcafa19b5fd56515a0>:0 
  at OmniSharp.MSBuild.Discovery.Providers.MonoInstanceProvider.GetInstances () [0x0000d] in <ec3b9b744cc24b97b94be13e30b9e41f>:0 
  at OmniSharp.MSBuild.Discovery.MSBuildLocator.GetInstances () [0x0001e] in <ec3b9b744cc24b97b94be13e30b9e41f>:0 
  at OmniSharp.MSBuild.Discovery.Extensions.RegisterDefaultInstance (OmniSharp.MSBuild.Discovery.IMSBuildLocator msbuildLocator, Microsoft.Extensions.Logging.ILogger logger) [0x00004] in <ec3b9b744cc24b97b94be13e30b9e41f>:0 
  at OmniSharp.CompositionHostBuilder.Build () [0x0008b] in <ec3b9b744cc24b97b94be13e30b9e41f>:0 
  at OmniSharp.Stdio.Host..ctor (System.IO.TextReader input, OmniSharp.Stdio.Services.ISharedTextWriter writer, OmniSharp.IOmniSharpEnvironment environment, System.IServiceProvider serviceProvider, OmniSharp.CompositionHostBuilder compositionHostBuilder, Microsoft.Extensions.Logging.ILoggerFactory loggerFactory, System.Threading.CancellationTokenSource cancellationTokenSource) [0x00057] in <35cdcec6f502484d8825e1fc7493c665>:0 
  at OmniSharp.Stdio.Driver.Program+<>c__DisplayClass0_1.<Main>b__1 () [0x00138] in <22c463206460470eafd215b3bb7ab1cd>:0 
  at OmniSharp.CommandLineApplication+<>c__DisplayClass11_0.<OnExecute>b__0 () [0x0000b] in <ec3b9b744cc24b97b94be13e30b9e41f>:0 
  at McMaster.Extensions.CommandLineUtils.CommandLineApplication.Execute (System.String[] args) [0x00039] in <344a1e8cd6594b17b1e01f8df6ae8827>:0 
  at OmniSharp.CommandLineApplication.Execute (System.Collections.Generic.IEnumerable`1[T] args) [0x00042] in <ec3b9b744cc24b97b94be13e30b9e41f>:0 
  at OmniSharp.Stdio.Driver.Program+<>c__DisplayClass0_0.<Main>b__0 () [0x00028] in <22c463206460470eafd215b3bb7ab1cd>:0 
  at OmniSharp.HostHelpers.Start (System.Func`1[TResult] action) [0x0001c] in <ec3b9b744cc24b97b94be13e30b9e41f>:0

ghost on Mar 20, 2019