[dotnet watch] Cannot open project Lib.fsproj because extension fsproj is not associated with a language

[carlossanlop]

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=932408
Build error leg or test failing: dotnet-sdk-public-ci

Error Message

{
  "ErrorMessage" : "because the file extension '.fsproj' is not associated with a language",
  "BuildRetry" : false,
  "ExcludeConsoleLog" : false
}

• PR: [ApiDiff] Update symbol filtering code to be able to load a list of strings or a list of files #46255
• Queue: FullFramework: windows (x64)
• Job result: https://dev.azure.com/dnceng-public/public/_build/results?buildId=932408&view=logs&j=2709a726-7db6-5829-ca7b-958b9d664f9e&t=9c6bf218-1bed-58a8-ccb2-7aefc7e3994e
• Log file: https://helixr1107v0xdeko0k025g8.blob.core.windows.net/dotnet-sdk-refs-pull-46255-merge-f03a79adaa674a1187/dotnet-watch.Tests.dll.1/1/console.1a860fa0.log?helixlogtype=result
• Output:

 dotnet watch ⚠ msbuild: [Failure] Cannot open project 
'C:\h\w\B34E099A\t\dotnetSdkTests\geksol2n.pb2\RenameSourceF---5F6BBE1E\FSharp\Lib.fsproj' 
because the file extension '.fsproj' is not associated with a language.

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=932408
Error message validated: [because the file extension '.fsproj' is not associated with a language]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 1/28/2025 10:53:09 PM UTC

Report

Build	Definition	Step Name	Console log	Pull Request
2688169	dotnet-sdk	Run dotnet-format on dotnet/aspnetcore AspNetCore.sln	Log	#49223

Build	Definition	Test	Pull Request
1023289	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48611
1023178	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48587
1021108	dotnet/sdk	Microsoft.DotNet.Watch.UnitTests.ApplyDeltaTests.Microsoft.DotNet.Watch.UnitTests.ApplyDeltaTests.Aspire	#48028
1020922	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48589
1020237	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48436
1019981	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48556
2689266	dotnet-sdk	Microsoft.DotNet.Watch.UnitTests.ApplyDeltaTests.Microsoft.DotNet.Watch.UnitTests.ApplyDeltaTests.MauiBlazor	#49269
2689020	dotnet-sdk	Microsoft.DotNet.Watch.UnitTests.ApplyDeltaTests.Microsoft.DotNet.Watch.UnitTests.ApplyDeltaTests.MauiBlazor	#49252
1018194	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48477
1017988	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48494
2688317	dotnet-sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#49223
2688152	dotnet-sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#49128
1017353	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48486
1016809	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48472
1016293	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48447
2686950	dotnet-sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#49128
1015325	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48430
1015239	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48393
1015036	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48425
2685339	dotnet-sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48918
2685332	dotnet-sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#49129
1014045	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48405
1013477	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48274
1012858	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48365
1012929	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48266
1012824	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48363
1012580	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48353
1012515	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48353
1012496	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48274
1012268	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48353
1012414	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48356
1011910	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48291
1011706	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48341
2683475	dotnet-sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48610
1010510	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48298
1010475	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48305
1010369	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48297
1010372	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48298
2682841	dotnet-sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48610
1010094	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48277
1009755	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48005
1009247	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48246
1009236	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48087
1008785	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48005
2681751	dotnet-sdk	Microsoft.DotNet.Watch.UnitTests.ApplyDeltaTests.Microsoft.DotNet.Watch.UnitTests.ApplyDeltaTests.MauiBlazor	#48610
2681707	dotnet-sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48611
1008115	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#45520
1007537	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48149
1007531	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48151
1007356	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48185
1006402	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48196
1006419	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48005
1005844	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48181
1005741	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48180
1003629	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48005
2678133	dotnet-sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48610
1003249	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48005
2678053	dotnet-sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48918
2678012	dotnet-sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48611
2677925	dotnet-sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48626
1002556	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48028
1002021	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48005
1001451	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48005
1000507	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48005
1000375	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48005
999041	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48005
998918	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#48012
996348	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#47691
996237	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#47956
994847	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#47873
994703	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#47773
994049	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#47900
993357	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#47819
993281	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#47833
992837	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#47792
992300	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#47850

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
2	8	77

[baronfel]

I thought @tmat already fixed this with a servicing fix to the 9.0.1xx releases? It should be in 102 or 103?

[tmat]

The warning is not the reason why the test failed.

[tmat]

This commit hasn't been integrated to main yet: 3cd7c65

[Forgind]

@tmat, just hit this issue in #45419, which is targeting release/9.0.3xx. I don't think this worked.

[Forgind]

https://helixr1107v0xdeko0k025g8.blob.core.windows.net/dotnet-sdk-refs-pull-45419-merge-3ed9793f78ef4bc6b6/dotnet-watch.Tests.dll.1/1/console.dd2344c8.log?helixlogtype=result

[tmat]

@Forgind You can ignore Mac ARM64 failures. The machines are slow and the tests time out.

[Forgind]

@Forgind You can ignore Mac ARM64 failures. The machines are slow and the tests time out.

Can you explain that a bit further? @marcpopMSFT told me that those machines should actually be faster than the x64 machines. That said, we've also had a lot of timeouts and are actively working on figuring out why (without success as of yet, hence the PR I linked). It may be that we've just misunderstood where the issue is on that leg, and we should just increase the timeout across the board.

[tmat]

@Forgind Not sure what the status is right now, but the Mac ARM64 CI leg has been optional for a while.

[Forgind]

It's optional right now because it's been timing out, but we've been trying to figure out why it keeps timing out so we can turn it back on. I don't know that it's just automatically slow.

[tmat]

Oh, I see. So in this specific case the logs show that dotnet build is taking very long time. Not sure where it gets stuck:

Microsoft.DotNet.Watch.UnitTests.ApplyDeltaTests.AddSourceFile [OUTPUT] dotnet watch 🚀 Launched '/private/tmp/helix/working/B2910953/p/d/dotnet' with arguments 'build /private/tmp/helix/working/B2910953/w/A696090A/e/testExecutionDirectory/AddSourceFile---E93D266F/AppWithDeps/App.WithDeps.csproj -consoleLoggerParameters:NoSummary;Verbosity=minimal': process id 96065

Seems like memory dumps were saved but I don't see them in the artifact list.

[marcpopMSFT]

To clarify, forgind was trying to get context on your comment that the arm64 machines are slow. Ever since we added that leg, it has been fairly consistently timing out. When I asked the codeflow chat, they indicated that arm64 should be faster than x64 so it wasn't a machine issue and we should dig further. That's when we made them optional, later turned them off, and have been trying to find out why they are timing out ever since. Do you have a reason to believe the mac arm64 machines are slower than the x64 ones?

[tmat]

Do you have a reason to believe the mac arm64 machines are slower than the x64 ones?

No specific reason. I didn't know forgind is trying to figure out why. Just stating that we have been skipping the CI leg because it's been timing out.

[Forgind]

@tmat, hit this again in #47110

Please fix this.

[tmat]

This fixes a potential race condition: #47117
It looks like this race is hit by #47110 based on the test logs.

[Forgind]

@tmat, hit this again in #48081

[tmat]

@Forgind I don't see dotnet-watch failure in that PR.

Found this though:

xUnit.net 00:00:31.22]       System.TypeLoadException : Could not load type 'FluentAssertions.Execution.Execute' from assembly 'FluentAssertions, Version=8.0.2.0, Culture=neutral, PublicKeyToken=33f2691a05b67b6a'.
projecttoolscommandresolver: invalid commandResolverArguments
[xUnit.net 00:00:31.22]       Stack Trace:
[xUnit.net 00:00:31.22]            at Microsoft.NET.TestFramework.Assertions.CommandResultAssertions.Pass()
[xUnit.net 00:00:31.22]            at Microsoft.NET.TestFramework.Assertions.CommandResultAssertions.Pass()
[xUnit.net 00:00:31.22]         /_/test/Microsoft.NET.TestFramework/TestAsset.cs(268,0): at Microsoft.NET.TestFramework.TestAsset.Restore(ITestOutputHelper log, String relativePath, String[] args)
[xUnit.net 00:00:31.22]         D:\a\_work\1\s\test\Microsoft.DotNet.CommandFactory.Tests\GivenAProjectToolsCommandResolver.cs(170,0): at Microsoft.DotNet.Tests.GivenAProjectToolsCommandResolver.ItReturnsACommandSpecWithArgsContainingCommandPathWhenReturningACommandSpecAndCommandArgumentsAreNull()
[xUnit.net 00:00:31.22]            at System.RuntimeMethodHandle.InvokeMethod(ObjectHandleOnStack target, Void** arguments, ObjectHandleOnStack sig, BOOL isConstructor, ObjectHandleOnStack result)
[xUnit.net 00:00:31.22]            at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
[xUnit.net 00:00:31.22]            at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)