[WIP] Incorrect transformation of command line args with \ symbol on unix

[Copilot]

Thanks for assigning this issue to me. I'm starting to work on it and will keep this PR's description up to date as I form a plan and make progress.

Original issue description:

On Windows the following command works good:

dotnet test -- NUnit.Where="namespace =~ /Abc\.Space1($|\.)/"

On Unix I use:

dotnet test -- NUnit.Where='namespace =~ /Abc\.Space1($|\.)/'

Error:

An exception occurred while invoking executor 'executor://nunit3testexecutor/': Unexpected token '.Space1($|' at position 18 in selection expression.

Gather diagnostics, and saw it:

TpTrace Information: 0 : 52885, 1, 2025/04/04, 17:51:29.669, 11794136606425, vstest.console.dll, TestRunRequest.ExecuteAsync: Starting run with settings:TestRunCriteria:
   KeepAlive=False,FrequencyOfRunStatsChangeEvent=10,RunStatsChangeEventTimeout=00:00:01.5000000,TestCaseFilter=,TestExecutorLauncher=
   Settingsxml=<RunSettings>
  <RunConfiguration>
    <ResultsDirectory>/mnt/e/Temp/Abc/TestResults</ResultsDirectory>
    <TargetPlatform>X64</TargetPlatform>
    <TargetFrameworkVersion>.NETCoreApp,Version=v8.0</TargetFrameworkVersion>
    <TestAdaptersPaths>/home/nick/.nuget/packages/coverlet.collector/6.0.4/build/netstandard2.0/</TestAdaptersPaths>
    <DesignMode>False</DesignMode>
    <CollectSourceInformation>False</CollectSourceInformation>
  </RunConfiguration>
  <NUnit>
    <Where>namespace =~ /Abc//.Space1($|//.)/</Where>
  </NUnit>
  <LoggerRunSettings>
    <Loggers>
      <Logger friendlyName="Console" uri="logger://microsoft/TestPlatform/ConsoleLogger/v1" assemblyQualifiedName="Microsoft.VisualStudio.TestPlatform.CommandLine.Internal.ConsoleLogger, vstest.console, Version=15.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" codeBase="/usr/lib/dotnet/sdk/8.0.110/vstest.console.dll" enabled="True" />
    </Loggers>
  </LoggerRunSettings>
</RunSettings>

Please pay attention that my \ symbol is silently converted to //. It happens on Unix only.

Fixes #15043.

---

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[nohwnd]

@copilot , looks like your session timed out. Try again.

[nohwnd]

Do you feel better today? Try re-running.

[nohwnd]

@copilot, rebuild?

[nohwnd]

@copilot go for it now.

[nohwnd]

@copilot ugh, one more build.

[Copilot]

@copilot ugh, one more build.

The build is currently failing due to network issues downloading the Microsoft.DotNet.Arcade.Sdk from Azure DevOps feeds ("Resource temporarily unavailable"). This appears to be a temporary infrastructure issue rather than a code problem. I'll continue monitoring and retry when the feeds are available.

Warning

Firewall rules blocked me from connecting to one or more addresses

I tried to connect to the following addresses, but was blocked by firewall rules:

• 80zvsblobprodcus35.vsblob.vsassets.io
  • Triggering command: dotnet build src/Microsoft.TestPlatform.Utilities/Microsoft.TestPlatform.Utilities.csproj (dns block)
  • Triggering command: dotnet build test/Microsoft.TestPlatform.Utilities.UnitTests/Microsoft.TestPlatform.Utilities.UnitTests.csproj --no-restore (dns block)
• 8xbvsblobprodcus382.vsblob.vsassets.io
  • Triggering command: dotnet build src/Microsoft.TestPlatform.Utilities/Microsoft.TestPlatform.Utilities.csproj (dns block)
  • Triggering command: dotnet build test/Microsoft.TestPlatform.Utilities.UnitTests/Microsoft.TestPlatform.Utilities.UnitTests.csproj --no-restore (dns block)
• bcnvsblobprodcus378.vsblob.vsassets.io
  • Triggering command: dotnet build src/Microsoft.TestPlatform.Utilities/Microsoft.TestPlatform.Utilities.csproj (dns block)
  • Triggering command: dotnet build test/Microsoft.TestPlatform.Utilities.UnitTests/Microsoft.TestPlatform.Utilities.UnitTests.csproj --no-restore (dns block)
• c50vsblobprodcus330.vsblob.vsassets.io
  • Triggering command: /home/REDACTED/work/vstest/vstest/.dotnet/dotnet msbuild /m /nologo /clp:Summary /v:minimal /nr:true /warnaserror /p:TreatWarningsAsErrors=true /p:ContinuousIntegrationBuild=false /home/REDACTED/work/vstest/vstest/artifacts/toolset/restore.proj /t:__WriteToolsetLocation /clp:ErrorsOnly;NoSummary /p:__ToolsetLocationOutputFile=/home/REDACTED/work/vstest/vstest/artifacts/toolset/9.0.0-beta.25302.2.txt (dns block)
  • Triggering command: dotnet build src/Microsoft.TestPlatform.Utilities/Microsoft.TestPlatform.Utilities.csproj (dns block)
  • Triggering command: dotnet build test/Microsoft.TestPlatform.Utilities.UnitTests/Microsoft.TestPlatform.Utilities.UnitTests.csproj --no-restore (dns block)
• d0svsblobprodcus381.vsblob.vsassets.io
  • Triggering command: dotnet build src/Microsoft.TestPlatform.Utilities/Microsoft.TestPlatform.Utilities.csproj (dns block)
  • Triggering command: dotnet build test/Microsoft.TestPlatform.Utilities.UnitTests/Microsoft.TestPlatform.Utilities.UnitTests.csproj --no-restore (dns block)
• imzvsblobprodcus368.vsblob.vsassets.io
  • Triggering command: dotnet build src/Microsoft.TestPlatform.Utilities/Microsoft.TestPlatform.Utilities.csproj (dns block)
  • Triggering command: dotnet build test/Microsoft.TestPlatform.Utilities.UnitTests/Microsoft.TestPlatform.Utilities.UnitTests.csproj --no-restore (dns block)
• jd4vsblobprodcus366.vsblob.vsassets.io
  • Triggering command: dotnet build src/Microsoft.TestPlatform.Utilities/Microsoft.TestPlatform.Utilities.csproj (dns block)
  • Triggering command: dotnet build test/Microsoft.TestPlatform.Utilities.UnitTests/Microsoft.TestPlatform.Utilities.UnitTests.csproj --no-restore (dns block)
• jrqvsblobprodcus343.vsblob.vsassets.io
  • Triggering command: dotnet build src/Microsoft.TestPlatform.Utilities/Microsoft.TestPlatform.Utilities.csproj (dns block)
  • Triggering command: dotnet build test/Microsoft.TestPlatform.Utilities.UnitTests/Microsoft.TestPlatform.Utilities.UnitTests.csproj --no-restore (dns block)
• kh4vsblobprodcus325.vsblob.vsassets.io
  • Triggering command: dotnet build src/Microsoft.TestPlatform.Utilities/Microsoft.TestPlatform.Utilities.csproj (dns block)
  • Triggering command: dotnet build test/Microsoft.TestPlatform.Utilities.UnitTests/Microsoft.TestPlatform.Utilities.UnitTests.csproj --no-restore (dns block)
• kmuvsblobprodcus389.vsblob.vsassets.io
  • Triggering command: dotnet build src/Microsoft.TestPlatform.Utilities/Microsoft.TestPlatform.Utilities.csproj (dns block)
  • Triggering command: dotnet build test/Microsoft.TestPlatform.Utilities.UnitTests/Microsoft.TestPlatform.Utilities.UnitTests.csproj --no-restore (dns block)
• l49vsblobprodcus358.vsblob.vsassets.io
  • Triggering command: dotnet build src/Microsoft.TestPlatform.Utilities/Microsoft.TestPlatform.Utilities.csproj (dns block)
  • Triggering command: dotnet build test/Microsoft.TestPlatform.Utilities.UnitTests/Microsoft.TestPlatform.Utilities.UnitTests.csproj --no-restore (dns block)
• lylvsblobprodcus31.vsblob.vsassets.io
  • Triggering command: dotnet build src/Microsoft.TestPlatform.Utilities/Microsoft.TestPlatform.Utilities.csproj (dns block)
  • Triggering command: dotnet build test/Microsoft.TestPlatform.Utilities.UnitTests/Microsoft.TestPlatform.Utilities.UnitTests.csproj --no-restore (dns block)
• o3svsblobprodcus318.vsblob.vsassets.io
  • Triggering command: dotnet build src/Microsoft.TestPlatform.Utilities/Microsoft.TestPlatform.Utilities.csproj (dns block)
  • Triggering command: dotnet build test/Microsoft.TestPlatform.Utilities.UnitTests/Microsoft.TestPlatform.Utilities.UnitTests.csproj --no-restore (dns block)
• x3yvsblobprodcus370.vsblob.vsassets.io
  • Triggering command: dotnet build src/Microsoft.TestPlatform.Utilities/Microsoft.TestPlatform.Utilities.csproj (dns block)
  • Triggering command: dotnet build test/Microsoft.TestPlatform.Utilities.UnitTests/Microsoft.TestPlatform.Utilities.UnitTests.csproj --no-restore (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to my firewall allow list

[nohwnd]

@copilot, there are no changes in files. try again to fix this issue.

[nohwnd]

@copilot one more try.