Disable EnsureEnvironmentExitDoesntHang on .NET Framework

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ConsoleLifetimeExitTests.EnsureEnvironmentExitDoesntHang fails on .NET Framework because System.Console.ControlCHooker.Unhook() throws IOException: The parameter is incorrect during process finalization, causing an unhandled exception (exit code -532462766 / EXCEPTION_COMPLUS). This is a known .NET Framework shutdown limitation.

Changes

• Added [SkipOnTargetFramework(TargetFrameworkMonikers.NetFramework, "NET Framework shutdown issue")] to EnsureEnvironmentExitDoesntHang — consistent with the existing skip on the related EnsureEnvironmentExitCode test
• Simplified the test body: removed the now-dead expectedExitCode = PlatformDetection.IsNetFramework ? 0 : 125 conditional, inlining 125 directly

Note

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Original prompt

---

This section details on the original issue you should resolve

<issue_title>Microsoft.Extensions.Hosting.Tests.ConsoleLifetimeExitTests.EnsureEnvironmentExitDoesntHang fails on .NET Framework</issue_title>
<issue_description>## Build Information
Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1143743
Build error leg or test failing: Microsoft.Extensions.Hosting.Tests.ConsoleLifetimeExitTests.EnsureEnvironmentExitDoesntHang
Pull request: #119515

Console excerpt:

    Microsoft.Extensions.Hosting.Tests.ConsoleLifetimeExitTests.EnsureEnvironmentExitDoesntHang [FAIL]
      Microsoft.DotNet.RemoteExecutor.RemoteExecutionException : Exit code was -532462766 but it should have been 0
      Stack Trace:
        /_/src/arcade/src/Microsoft.DotNet.RemoteExecutor/src/RemoteInvokeHandle.cs(242,0): at Microsoft.DotNet.RemoteExecutor.RemoteInvokeHandle.Dispose(Boolean disposing)
        /_/src/libraries/Microsoft.Extensions.Hosting/tests/UnitTests/ConsoleLifetimeExitTests.cs(223,0): at Microsoft.Extensions.Hosting.Tests.ConsoleLifetimeExitTests.EnsureEnvironmentExitDoesntHang()

-532462766 corresponds with EXCEPTION_COMPLUS.

{
  "ErrorMessage": "ConsoleLifetimeExitTests.EnsureEnvironmentExitDoesntHang [FAIL]",
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1143743
Error message validated: [Microsoft\.DotNet\.RemoteExecutor\.RemoteExecutionException : Exit code was -532462766 but it should have been 0.*EnsureEnvironmentExitDoesntHang()]
Result validation: ❌ Known issue did not match with the provided build.
Validation performed at: 9/10/2025 6:12:29 PM UTC

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1143743
Error message validated: [Microsoft.DotNet.RemoteExecutor.RemoteExecutionException : Exit code was -532462766 but it should have been 0]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 9/10/2025 7:05:39 PM UTC

Report

Build	Definition	Test	Pull Request
1143743	dotnet/runtime	Microsoft.Extensions.Hosting.Tests.ConsoleLifetimeExitTests.EnsureEnvironmentExitDoesntHang	#119515

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
1	1	1

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1143743
Error message validated: [at System.Console.ControlCHooker.Unhook]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 9/10/2025 7:07:38 PM UTC

Report

Build	Definition	Test	Pull Request
1143743	dotnet/runtime	Microsoft.Extensions.Hosting.Tests.ConsoleLifetimeExitTests.EnsureEnvironmentExitDoesntHang	#119515

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
1	1	1

Report

Build	Definition	Test	Pull Request
1174378	dotnet/runtime	Microsoft.Extensions.Hosting.Tests.ConsoleLifetimeExitTests.EnsureEnvironmentExitDoesntHang
1170349	dotnet/runtime	Microsoft.Extensions.Hosting.Tests.ConsoleLifetimeExitTests.EnsureEnvironmentExitDoesntHang	#120603
1169444	dotnet/runtime	[Microsoft.Extensions.Hosting.Tests.ConsoleLifetimeExitT...

• Fixes Microsoft.Extensions.Hosting.Tests.ConsoleLifetimeExitTests.EnsureEnvironmentExitDoesntHang fails on .NET Framework #119545

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Pull request overview

This PR disables ConsoleLifetimeExitTests.EnsureEnvironmentExitDoesntHang when running on .NET Framework due to a known shutdown/finalization limitation that can cause an unhandled exception during process teardown, making the test unreliable in that target.

Changes:

• Added a .NET Framework-specific skip to EnsureEnvironmentExitDoesntHang.
• Simplified the expected exit code logic by inlining the non-.NET-Framework expected exit code (125).

[jkotas]

Looks fine to me.

cc @dotnet/area-extensions-hosting @mrek-msft for awareness

[danmoseley]

Assert.True() Failure
Expected: True
Actual:   False



Stack trace
   at Microsoft.Extensions.Hosting.Internal.HostTests.<StartCanBeCancelled>d__13.MoveNext() in /_/src/libraries/Microsoft.Extensions.Hosting/tests/UnitTests/Internal/HostTests.cs:line 297
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)