[ppc64le][mono] dotnet tool update -g is failing

[Swapnali911]

To Reproduce

Run dotnet tool update -g dotnet-trace

Actual :

Unhandled exception: System.ArgumentNullException: Value cannot be null. (Parameter 'key')
   at System.Collections.Generic.Dictionary`2[[System.CommandLine.CliSymbol, System.CommandLine, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35],[System.CommandLine.Parsing.SymbolResult, System.CommandLine, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].FindValue(CliSymbol key)
   at System.Collections.Generic.Dictionary`2[[System.CommandLine.CliSymbol, System.CommandLine, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35],[System.CommandLine.Parsing.SymbolResult, System.CommandLine, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].TryGetValue(CliSymbol key, SymbolResult& value)
   at System.CommandLine.Parsing.SymbolResultTree.GetResult(CliOption option)
   at System.CommandLine.Parsing.SymbolResult.GetResult(CliOption option)
   at System.CommandLine.ParseResult.GetResult(CliOption option)
   at Microsoft.DotNet.Tools.Tool.Common.ToolAppliedOption.EnsureNoConflictUpdateAllVersionOption(ParseResult parseResult, String message)
   at Microsoft.DotNet.Tools.Tool.Update.ToolUpdateCommand.Execute()
   at Microsoft.DotNet.Cli.ToolUpdateCommandParser.<>c.<ConstructCommand>b__5_0(ParseResult parseResult)
   at System.CommandLine.Invocation.AnonymousSynchronousCliAction.Invoke(ParseResult parseResult)
   at System.CommandLine.Invocation.InvocationPipeline.Invoke(ParseResult parseResult)
   at System.CommandLine.ParseResult.Invoke()
   at Microsoft.DotNet.Cli.Program.ProcessArgs(String[] args, TimeSpan startupTime, ITelemetry telemetryClient)

Expected :
dotnet tool update should work without any issue

Tarball Details :

# dotnet --info
.NET SDK:
 Version:           9.0.100-preview.5.24307.1
 Commit:            35b2c21ea6
 Workload version:  9.0.100-manifests.9b4ca231
 MSBuild version:   17.11.0-preview-24279-02+b963c24ef

Runtime Environment:
 OS Name:     rhel
 OS Version:  9
 OS Platform: Linux
 RID:         linux-ppc64le
 Base Path:   /home/check_tarball/.dotnet/sdk/9.0.100-preview.5.24307.1/

.NET workloads installed:
Configured to use loose manifests when installing new manifests.
There are no installed workloads to display.

Host:
  Version:      9.0.0-preview.5.24306.7
  Architecture: ppc64le
  Commit:       a5cc707d97

.NET SDKs installed:
  9.0.100-preview.5.24307.1 [/home/check_tarball/.dotnet/sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.App 9.0.0-preview.5.24306.11 [/home/check_tarball/.dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 9.0.0-preview.5.24306.7 [/home/check_tarball/.dotnet/shared/Microsoft.NETCore.App]

Other architectures found:
  None

Environment variables:
  DOTNET_ROOT       [/home/check_tarball/.dotnet]

global.json file:
  Not found

Learn more:
  https://aka.ms/dotnet/info

Download .NET:
  https://aka.ms/dotnet/download

cc : @tmds @omajid @alhad-deshpande @ashwinik30

[tmds]

This is a Mono runtime issue. It happens also on x64.

The supposed null argument is the VersionOption that is passed here:

sdk/src/Cli/dotnet/commands/dotnet-tool/common/ToolAppliedOption.cs

Line 74 in fda398e

if (parseResult.GetResult(VersionOption) is not null)

VersionOption a static that gets intialized from another class's static:

sdk/src/Cli/dotnet/commands/dotnet-tool/common/ToolAppliedOption.cs

Line 22 in fda398e

public static readonly CliOption<string> VersionOption = ToolInstallCommandParser.VersionOption;

sdk/src/Cli/dotnet/commands/dotnet-tool/install/ToolInstallCommandParser.cs

Lines 20 to 24 in fda398e

	public static readonly CliOption<string> VersionOption = new("--version")
	{
	Description = LocalizableStrings.VersionOptionDescription,
	HelpName = LocalizableStrings.VersionOptionName
	};

The VersionOption was added in this PR #38996 which is why we're only recently seeing this issue.

An easy workaround may be to initialize the VersionOption in ToolAppliedOption.
The root cause seems some issue with the static initialization in Mono.

cc @lambdageek @uweigand

[lambdageek]

Probably related to dotnet/runtime#88066 or dotnet/runtime#77513

[lambdageek]

/cc @steveisok

[marcpopMSFT]

I believe that tmds fixed this in the linked issue so marking it closed.