[Known Build Error] dotnet run launch profile tests fail due to unexpected 'Using launch settings' stderr output

[tmat]

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1379337
Build error leg or test failing: dotnet.Tests.dll.9, dotnet.Tests.dll.10, dotnet.Tests.dll.11
Pull request: #53877

Error Message

{
  "ErrorMessage": "Using launch settings from",
  "ErrorPattern": "",
  "BuildRetry": true,
  "ExcludeConsoleLog": false
}

Details

Multiple dotnet run tests fail because dotnet run now outputs Using launch settings from ...launchSettings.json... to stderr when using launch profiles, but the tests assert that stderr should be empty or null.

Affected tests:

• Microsoft.DotNet.Cli.Run.Tests.GivenDotnetRunRunsVbproj.ItUsesLaunchProfileOfTheSpecifiedName(launchProfileName: "Second")
• Microsoft.DotNet.Cli.Run.Tests.GivenDotnetRunRunsVbproj.ItUsesLaunchProfileOfTheSpecifiedName(launchProfileName: "sEcoND")
• Microsoft.DotNet.Cli.Run.Tests.GivenDotnetRunRunsVbproj.ItDefaultsToTheFirstUsableLaunchProfile
• Microsoft.DotNet.Cli.Run.Tests.RunCommandTests.EnvironmentVariableExpansion_Project

Reproduces on main — confirmed in build:

• https://dev.azure.com/dnceng-public/public/_build/results?buildId=1379337 (dotnet.Tests.dll.9, dotnet.Tests.dll.10, dotnet.Tests.dll.11)

Sample error (ItUsesLaunchProfileOfTheSpecifiedName):

Expected string to be <null> or empty because Expected command to not output to stderr but it was not:
Working Directory: ...\ItUsesLaunchP---E6B15DAB
File Name: ...\dotnet.exe
Arguments: run --launch-profile sEcoND
Exit Code: 0
StdOut:
Second
StdErr:
Using launch settings from ...\My Project\launchSettings.json...

Sample error (EnvironmentVariableExpansion_Project):

Expected string to be empty, but found "Using launch settings from ...\Properties\launchSettings.json...".

Sample logs:

• https://helix.dot.net/api/2019-06-17/jobs/cff15007-3ed0-4af1-a6c8-bd36fe3287b5/workitems/dotnet.Tests.dll.10/console
• https://helix.dot.net/api/2019-06-17/jobs/cff15007-3ed0-4af1-a6c8-bd36fe3287b5/workitems/dotnet.Tests.dll.11/console
• https://helix.dot.net/api/2019-06-17/jobs/cff15007-3ed0-4af1-a6c8-bd36fe3287b5/workitems/dotnet.Tests.dll.9/console

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1379337
Error message validated: [Using launch settings from]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 4/15/2026 5:09:35 AM UTC

Report

Build	Definition	Test	Pull Request
1381964	dotnet/sdk	Microsoft.DotNet.Cli.Run.Tests.GivenDotnetRunBuildsCsproj.ItUsesLaunchProfileOfTheSpecifiedName	#53836
1381919	dotnet/sdk	Microsoft.DotNet.Cli.Run.Tests.GivenDotnetRunBuildsCsproj.ItSetsTheDotnetLaunchProfileEnvironmentVariableToSuppliedLaunchProfileName	#53884
1381709	dotnet/sdk	Microsoft.DotNet.Cli.Run.Tests.GivenDotnetRunBuildsCsproj.ItSetsTheDotnetLaunchProfileEnvironmentVariableToDefaultLaunchProfileName	#53884
1381583	dotnet/sdk	dotnet-watch.Tests.dll.4.WorkItemExecution	#53914
1381244	dotnet/sdk	dotnet.Tests.dll.19.WorkItemExecution	#53821
1381241	dotnet/sdk	dotnet-watch.Tests.dll.4.WorkItemExecution	#53779
1381152	dotnet/sdk	Microsoft.DotNet.Cli.Run.Tests.RunCommandTests.EnvironmentVariableExpansion_Project	#53850
1381145	dotnet/sdk	Microsoft.DotNet.Cli.Run.Tests.GivenDotnetRunBuildsCsproj.ItPrintsUsingLaunchSettingsMessageWhenNotQuiet	#53820
1381205	dotnet/sdk	dotnet.Tests.dll.11.WorkItemExecution	#53908
1381164	dotnet/sdk	dotnet.Tests.dll.11.WorkItemExecution	#53906
1381119	dotnet/sdk	dotnet-watch.Tests.dll.2.WorkItemExecution	#53898
2952238	dotnet-sdk	Microsoft.DotNet.Cli.Run.Tests.GivenDotnetRunRunsVbproj.ItUsesLaunchProfileOfTheSpecifiedName	#59726
1381014	dotnet/sdk	Microsoft.DotNet.Cli.Run.Tests.GivenDotnetRunBuildsCsproj.ItPrintsUsingLaunchSettingsMessageWhenNotQuiet	#53903
1378600	dotnet/sdk	dotnet.Tests.dll.9.WorkItemExecution	#53723
2952239	dotnet-sdk	Microsoft.DotNet.Cli.Run.Tests.GivenDotnetRunRunsVbproj.ItUsesLaunchProfileOfTheSpecifiedName	#59725
1380895	dotnet/sdk	Microsoft.DotNet.Cli.Run.Tests.RunFileTests_BuildCommands.LaunchProfile	#53836
1374751	dotnet/sdk	dotnet.Tests.dll.9.WorkItemExecution	#53820
1380761	dotnet/sdk	Microsoft.DotNet.Cli.Run.Tests.GivenDotnetRunBuildsCsproj.ItPrefersTheValueOfAppUrlFromEnvVarOverTheProp	#53680
1380629	dotnet/sdk	Microsoft.DotNet.Cli.Run.Tests.RunCommandTests.EnvironmentVariableExpansion_Project	#53557
1380767	dotnet/sdk	dotnet-watch.Tests.dll.2.WorkItemExecution	#53898
1380564	dotnet/sdk	Microsoft.DotNet.Cli.Run.Tests.GivenDotnetRunBuildsCsproj.ItPrintsUsingLaunchSettingsMessageWhenNotQuiet	#53817
1380568	dotnet/sdk	Microsoft.DotNet.Cli.Run.Tests.GivenDotnetRunBuildsCsproj.ItSetsTheDotnetLaunchProfileEnvironmentVariableToSuppliedLaunchProfileName
1380380	dotnet/sdk	Microsoft.DotNet.Cli.Run.Tests.GivenDotnetRunBuildsCsproj.ItPrintsUsingLaunchSettingsMessageWhenNotQuiet
1380347	dotnet/sdk	Microsoft.DotNet.Cli.Run.Tests.GivenDotnetRunBuildsCsproj.ItSetsTheDotnetLaunchProfileEnvironmentVariableToSuppliedLaunchProfileName	#53680
1380341	dotnet/sdk	Microsoft.DotNet.Cli.Run.Tests.RunCommandTests.EnvironmentVariableExpansion_Project	#53884
2951749	dotnet-sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#59580
1380229	dotnet/sdk	dotnet.Tests.dll.9.WorkItemExecution	#53714
1380051	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#53864
1376812	dotnet/sdk	dotnet.Tests.dll.9.WorkItemExecution	#53835
1380100	dotnet/sdk	Microsoft.DotNet.Cli.Run.Tests.RunCommandTests.EnvironmentVariableExpansion_Project	#53884
1378475	dotnet/sdk	Microsoft.DotNet.Cli.Run.Tests.GivenDotnetRunRunsVbproj.ItUsesLaunchProfileOfTheSpecifiedName	#53857
2951750	dotnet-sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#59579
1379927	dotnet/sdk	dotnet.Tests.dll.9.WorkItemExecution	#53883
1379780	dotnet/sdk	Microsoft.DotNet.Cli.Run.Tests.RunFileTests_BuildCommands.LaunchProfile	#53836
2951542	dotnet-sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#59580
1379432	dotnet/sdk	Microsoft.DotNet.Cli.Run.Tests.GivenDotnetRunRunsVbproj.ItUsesLaunchProfileOfTheSpecifiedName	#53847
1379700	dotnet/sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#53875
1379611	dotnet/sdk	Microsoft.DotNet.Cli.Run.Tests.RunCommandTests.EnvironmentVariableExpansion_Project
2951536	dotnet-sdk	Microsoft.DotNet.Cli.Run.Tests.GivenDotnetRunRunsVbproj.ItUsesLaunchProfileOfTheSpecifiedName	#59726
1379555	dotnet/sdk	Microsoft.DotNet.Cli.Run.Tests.GivenDotnetRunBuildsCsproj.ItSetsTheDotnetLaunchProfileEnvironmentVariableToDefaultLaunchProfileName	#53850
2951537	dotnet-sdk	Microsoft.DotNet.Cli.Run.Tests.GivenDotnetRunBuildsCsproj.ItCanRunAMultiTFMProjectWithImplicitRestore	#59725
2951444	dotnet-sdk	dotnet-watch.Tests.dll.1.WorkItemExecution	#59580
2951428	dotnet-sdk	Microsoft.DotNet.Cli.Run.Tests.GivenDotnetRunRunsVbproj.ItUsesLaunchProfileOfTheSpecifiedName	#59726
1379337	dotnet/sdk	Microsoft.DotNet.Cli.Run.Tests.GivenDotnetRunBuildsCsproj.ItUsesLaunchProfileOfTheSpecifiedName	#53877
2951429	dotnet-sdk	Microsoft.DotNet.Cli.Run.Tests.GivenDotnetRunBuildsCsproj.ItCanRunAMultiTFMProjectWithImplicitRestore	#59725
1377961	dotnet/sdk	dotnet-watch.Tests.dll.6.WorkItemExecution	#53833

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
25	46	46