System.IndexOutOfRangeException in OmniSharp.Utilities.PlatformHelper.GetMonoVersion

[rene-descartes2021]

Error on download and run:

$ wget https://github.com/OmniSharp/omnisharp-roslyn/releases/download/v1.39.13/omnisharp-linux-arm64.tar.gz
$ tar xzvf omnisharp-linux-arm64.tar.gz
$ ./run
{"Event":"log","Body":{"LogLevel":"INFORMATION","Name":"OmniSharp.Stdio.Host","Message":"Starting OmniSharp on Linux 0.0 (Unknown)"},"Seq":1,"Type":"event"}
{"Event":"log","Body":{"LogLevel":"INFORMATION","Name":"OmniSharp.Services.DotNetCliService","Message":"Checking the 'DOTNET_ROOT' environment variable to find a .NET SDK"},"Seq":2,"Type":"event"}
{"Event":"log","Body":{"LogLevel":"INFORMATION","Name":"OmniSharp.Services.DotNetCliService","Message":"DotNetPath set to /data/data/com.termux/files/usr/lib/dotnet/dotnet"},"Seq":3,"Type":"event"}
System.IndexOutOfRangeException: Index was outside the bounds of the array.
  at OmniSharp.Utilities.PlatformHelper.GetMonoVersion () [0x0002b] in <2e4943dec5344e2085e51702e281221a>:0
  at OmniSharp.MSBuild.Discovery.Providers.MonoInstanceProvider.GetInstances () [0x0009d] in <6714f554c80a4f15b10f9d1a07514fee>:0
  at OmniSharp.MSBuild.Discovery.MSBuildLocator.GetInstances () [0x0001b] in <6714f554c80a4f15b10f9d1a07514fee>:0
  at OmniSharp.MSBuild.Discovery.Extensions.GetBestInstance (OmniSharp.MSBuild.Discovery.IMSBuildLocator msbuildLocator, System.Version minimumMSBuildVersion, Microsoft.Extensions.Logging.ILogger logger, System.Boolean& invalidVSFound, System.Boolean& vsWithoutSdkResolver) [0x0000b] in <6714f554c80a4f15b10f9d1a07514fee>:0
  at OmniSharp.MSBuild.Discovery.Extensions.RegisterDefaultInstance (OmniSharp.MSBuild.Discovery.IMSBuildLocator msbuildLocator, Microsoft.Extensions.Logging.ILogger logger, OmniSharp.Services.DotNetInfo dotNetInfo) [0x0001e] in <6714f554c80a4f15b10f9d1a07514fee>:0
  at OmniSharp.CompositionHostBuilder.Build (System.String workingDirectory) [0x000ad] in <6714f554c80a4f15b10f9d1a07514fee>: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) [0x00065] in <a21b7804648c4a68a8724e9af77e2540>:0
  at OmniSharp.Stdio.Driver.Program+<>c__DisplayClass0_1.<Main>b__1 () [0x0017d] in <41ffe59c485749dfa5a695f894515abf>:0
  at OmniSharp.CommandLineApplication+<>c__DisplayClass12_0.<OnExecute>b__0 () [0x0000b] in <6714f554c80a4f15b10f9d1a07514fee>:0
  at McMaster.Extensions.CommandLineUtils.CommandLineApplication+<>c__DisplayClass143_0.<OnExecute>b__0 (System.Threading.CancellationToken _) [0x00000] in <21ffa10636d3445095cca7f9fdee08c0>:0
  at McMaster.Extensions.CommandLineUtils.CommandLineApplication.ExecuteAsync (System.String[] args, System.Threading.CancellationToken cancellationToken) [0x000ba] in <21ffa10636d3445095cca7f9fdee08c0>:0
  at McMaster.Extensions.CommandLineUtils.CommandLineApplication.Execute (System.String[] args) [0x00016] in <21ffa10636d3445095cca7f9fdee08c0>:0
  at OmniSharp.CommandLineApplication.Execute (System.String[] args) [0x00081] in <6714f554c80a4f15b10f9d1a07514fee>:0
  at OmniSharp.Stdio.Driver.Program+<>c__DisplayClass0_0.<Main>b__0 () [0x00028] in <41ffe59c485749dfa5a695f894515abf>:0
  at OmniSharp.HostHelpers.Start (System.Func`1[TResult] action) [0x0001c] in <6714f554c80a4f15b10f9d1a07514fee>:0

The omnisharp-linux-arm64-net6.0 (non-portable build?) won't work for me as that is glibc. I am using bionic libc. So I tried what I expect to be the portable build omnisharp-linux-arm64.

I believe I am using the "Linux Bionic Arm64 NativeAOT" vertical build of dotnet. I'm probably among the first to try using OmniSharp with this. It was compiled with --use-mono-runtime even though it targets linux-bionic, I'm really not sure how things work there with both Mono and CoreCLR.

Oh, I just noticed mono --version doesn't print anything or error and it should?:

$  mono --version
$  echo $?
0

Here is dotnet info:

$  dotnet --info
.NET SDK:
 Version:           8.0.112
 Commit:            3f0c4a16e5
 Workload version:  8.0.100-manifests.784cc8f7

Runtime Environment:
 OS Name:     Linux
 OS Version:
 OS Platform: Linux
 RID:         linux-bionic-arm64
 Base Path:   /data/data/com.termux/files/usr/lib/dotnet/sdk/8.0.112/

.NET workloads installed:
 Workload version: 8.0.100-manifests.784cc8f7
There are no installed workloads to display.

Host:
  Version:      8.0.12
  Architecture: arm64
  Commit:       89ef51c5d8

.NET SDKs installed:
  8.0.112 [/data/data/com.termux/files/usr/lib/dotnet/sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.App 8.0.12 [/data/data/com.termux/files/usr/lib/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 8.0.12 [/data/data/com.termux/files/usr/lib/dotnet/shared/Microsoft.NETCore.App]

Other architectures found:
  None

Environment variables:
  DOTNET_ROOT       [/data/data/com.termux/files/usr/lib/dotnet]

Well any diagnostics I can try let me know. Might not be OmniSharp? Maybe dotnet was built with an unexpected problem by the Termux distro maintainer?

I plan to try to build a non-portable release of Omnisharp (for bionic libc) and see how that goes.

Thank you for looking and have a nice day.

[rene-descartes2021]

Oh.. looking around in the issues I see that the net6 release should be used as dotnet OmniSharp.dll.

I'd initially just looked at what I expect to see when something uses glibc:

$  ldd OmniSharp
        libpthread.so.0 => not found
        libdl.so.2 => not found
        libstdc++.so.6 => not found
        libm.so.6 => not found
        libgcc_s.so.1 => not found
        libc.so.6 => not found
        ld-linux-aarch64.so.1 => not found

However I get a different error now with dotnet OmniSharp.dll from the net6 release:

$  dotnet OmniSharp.dll
{"Event":"log","Body":{"LogLevel":"INFORMATION","Name":"OmniSharp.Stdio.Host","Message":"Starting OmniSharp on Unknown 0.0 (Unknown)"},"Seq":1,"Type":"event"}
{"Event":"log","Body":{"LogLevel":"INFORMATION","Name":"OmniSharp.Services.DotNetCliService","Message":"Checking the 'DOTNET_ROOT' environment variable to find a .NET SDK"},"Seq":2,"Type":"event"}
{"Event":"log","Body":{"LogLevel":"INFORMATION","Name":"OmniSharp.Services.DotNetCliService","Message":"DotNetPath set to /data/data/com.termux/files/usr/lib/dotnet/dotnet"},"Seq":3,"Type":"event"}
System.Runtime.InteropServices.MarshalDirectiveException: Array size control parameter must be an integral type.
   at Microsoft.Build.Locator.DotNetSdkLocationHelper.GetAllAvailableSDKs()
   at Microsoft.Build.Locator.DotNetSdkLocationHelper.GetDotNetBasePaths(String workingDirectory)+MoveNext()
   at Microsoft.Build.Locator.DotNetSdkLocationHelper.GetInstances(String workingDirectory)+MoveNext()
   at Microsoft.Build.Locator.MSBuildLocator.GetInstances(VisualStudioInstanceQueryOptions options)+MoveNext()
   at System.Linq.Enumerable.WhereEnumerableIterator`1[[Microsoft.Build.Locator.VisualStudioInstance, Microsoft.Build.Locator, Version=1.0.0.0, Culture=neutral, PublicKeyToken=9dff12846e04bfbd]].ToArray()
   at System.Linq.Buffer`1[[Microsoft.Build.Locator.VisualStudioInstance, Microsoft.Build.Locator, Version=1.0.0.0, Culture=neutral, PublicKeyToken=9dff12846e04bfbd]]..ctor(IEnumerable`1 source)
   at System.Linq.OrderedEnumerable`1[[Microsoft.Build.Locator.VisualStudioInstance, Microsoft.Build.Locator, Version=1.0.0.0, Culture=neutral, PublicKeyToken=9dff12846e04bfbd]].ToArray()
   at System.Linq.Enumerable.ToArray[VisualStudioInstance](IEnumerable`1 source)
   at System.Collections.Immutable.ImmutableArray.CreateRange[VisualStudioInstance](IEnumerable`1 items)
   at System.Collections.Immutable.ImmutableArray.ToImmutableArray[VisualStudioInstance](IEnumerable`1 items)
   at OmniSharp.MSBuild.Discovery.Providers.SdkInstanceProvider.GetInstances() in /home/vsts/work/1/s/src/OmniSharp.Host/MSBuild/Discovery/Providers/SdkInstanceProvider.cs:line 33
   at OmniSharp.MSBuild.Discovery.MSBuildLocator.GetInstances() in /home/vsts/work/1/s/src/OmniSharp.Host/MSBuild/Discovery/MSBuildLocator.cs:line 120
   at OmniSharp.MSBuild.Discovery.Extensions.GetBestInstance(IMSBuildLocator msbuildLocator, Version minimumMSBuildVersion, ILogger logger, Boolean& invalidVSFound, Boolean& vsWithoutSdkResolver) in /home/vsts/work/1/s/src/OmniSharp.Host/MSBuild/Discovery/Extensions.cs:line 84
   at OmniSharp.MSBuild.Discovery.Extensions.RegisterDefaultInstance(IMSBuildLocator msbuildLocator, ILogger logger, DotNetInfo dotNetInfo) in /home/vsts/work/1/s/src/OmniSharp.Host/MSBuild/Discovery/Extensions.cs:line 17
   at OmniSharp.CompositionHostBuilder.Build(String workingDirectory) in /home/vsts/work/1/s/src/OmniSharp.Host/CompositionHostBuilder.cs:line 68
   at OmniSharp.Stdio.Host..ctor(TextReader input, ISharedTextWriter writer, IOmniSharpEnvironment environment, IServiceProvider serviceProvider, CompositionHostBuilder compositionHostBuilder, ILoggerFactory loggerFactory, CancellationTokenSource cancellationTokenSource) in /home/vsts/work/1/s/src/OmniSharp.Stdio/Host.cs:line 49
   at OmniSharp.Stdio.Driver.Program.<>c__DisplayClass0_1.<Main>b__1() in /home/vsts/work/1/s/src/OmniSharp.Stdio.Driver/Program.cs:line 74
   at OmniSharp.CommandLineApplication.<>c__DisplayClass12_0.<OnExecute>b__0() in /home/vsts/work/1/s/src/OmniSharp.Host/CommandLineApplication.cs:line 92
   at McMaster.Extensions.CommandLineUtils.CommandLineApplication.<>c__DisplayClass143_0.<OnExecute>b__0(CancellationToken _)
   at McMaster.Extensions.CommandLineUtils.CommandLineApplication.ExecuteAsync(String[] args, CancellationToken cancellationToken)
   at McMaster.Extensions.CommandLineUtils.CommandLineApplication.Execute(String[] args)
   at OmniSharp.CommandLineApplication.Execute(String[] args) in /home/vsts/work/1/s/src/OmniSharp.Host/CommandLineApplication.cs:line 65
   at OmniSharp.Stdio.Driver.Program.<>c__DisplayClass0_0.<Main>b__0() in /home/vsts/work/1/s/src/OmniSharp.Stdio.Driver/Program.cs:line 84
   at OmniSharp.HostHelpers.Start(Func`1 action) in /home/vsts/work/1/s/src/OmniSharp.Host/HostHelpers.cs:line 30

I guess I should just try building OmniSharp in this environment and see how that goes.