Build Information
Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1515786
Leg Name: TestBuild: linux (x64) - ubuntu.2204.amd64.open — Helix work item dotnet.Tests.dll.20 (Finished, exit code 2)
Microsoft.DotNet.Cli.Sln.Add.Tests.GivenDotnetSlnAdd.WhenNestedProjectIsAddedSolutionFoldersAreCreatedBuild intermittently fails on the ("sln", True, ".slnx") data row. After dotnet sln App.slnx add foo and add foo/bar succeed, the assertion step dotnet build App.slnx fails with exit code 1 due to 8× error CS0579: Duplicate '...' attribute on the outer foo.csproj — the nested bar project's generated obj/**/*.AssemblyInfo.cs / .AssemblyAttributes.cs are picked up by foo's default source glob during the solution build, producing duplicate assembly attributes (test source GivenDotnetSlnAdd.cs#L294).
The failure is intermittent — the same test passes on other builds (e.g. the linux/windows dotnet.Tests partitions of build 1513455), consistent with a build-ordering/globbing race when foo and its physically-nested bar restore/build in parallel. It is not caused by the PR it was seen in — #55352 only changes a GitHub Actions workflow auth token and does not touch dotnet sln or the build.
Observed occurrence:
Error Details
failed WhenNestedProjectIsAddedSolutionFoldersAreCreatedBuild ("sln",True,".slnx") (8s 914ms)
Test method Microsoft.DotNet.Cli.Sln.Add.Tests.GivenDotnetSlnAdd.WhenNestedProjectIsAddedSolutionFoldersAreCreatedBuild threw exception:
FluentAssertions.Execution.AssertionFailedException: Expected value to be 0 because Expected command to pass but it did not.
File Name: .../p/d/dotnet
Arguments: build App.slnx
Exit Code: 1
StdOut:
...
bar -> .../foo/bar/bin/Debug/netstandard2.0/bar.dll
.../foo/obj/Debug/netstandard2.0/.NETStandard,Version=v2.0.AssemblyAttributes.cs(4,12): error CS0579: Duplicate 'global::System.Runtime.Versioning.TargetFrameworkAttribute' attribute [.../foo/foo.csproj]
.../foo/obj/Debug/netstandard2.0/foo.AssemblyInfo.cs(13,12): error CS0579: Duplicate 'System.Reflection.AssemblyCompanyAttribute' attribute [.../foo/foo.csproj]
.../foo/obj/Debug/netstandard2.0/foo.AssemblyInfo.cs(14,12): error CS0579: Duplicate 'System.Reflection.AssemblyConfigurationAttribute' attribute [.../foo/foo.csproj]
... (8 Error(s) total) ...
Build FAILED.
at Microsoft.NET.TestFramework.Assertions.CommandResultAssertions.Pass() in /_/test/Microsoft.NET.TestFramework/Assertions/CommandResultAssertions.cs:27
at Microsoft.DotNet.Cli.Sln.Add.Tests.GivenDotnetSlnAdd.WhenNestedProjectIsAddedSolutionFoldersAreCreatedBuild(String solutionCommand, Boolean fooFirst, String solutionExtension) in /_/test/dotnet.Tests/CommandTests/Solution/Add/GivenDotnetSlnAdd.cs:294
Error Message
{
"ErrorMessage": [
"failed WhenNestedProjectIsAddedSolutionFoldersAreCreatedBuild",
"GivenDotnetSlnAdd.WhenNestedProjectIsAddedSolutionFoldersAreCreatedBuild"
],
"BuildRetry": false,
"ExcludeConsoleLog": false
}Known issue validation
Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1515786
Error message validated: [failed WhenNestedProjectIsAddedSolutionFoldersAreCreatedBuild GivenDotnetSlnAdd.WhenNestedProjectIsAddedSolutionFoldersAreCreatedBuild]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 7/19/2026 7:19:17 AM UTC
Report
Summary
| 24-Hour Hit Count |
7-Day Hit Count |
1-Month Count |
| 0 |
1 |
1 |
Build Information
Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1515786
Leg Name:
TestBuild: linux (x64) - ubuntu.2204.amd64.open— Helix work itemdotnet.Tests.dll.20(Finished, exit code 2)Microsoft.DotNet.Cli.Sln.Add.Tests.GivenDotnetSlnAdd.WhenNestedProjectIsAddedSolutionFoldersAreCreatedBuildintermittently fails on the("sln", True, ".slnx")data row. Afterdotnet sln App.slnx add fooandadd foo/barsucceed, the assertion stepdotnet build App.slnxfails with exit code 1 due to 8×error CS0579: Duplicate '...' attributeon the outerfoo.csproj— the nestedbarproject's generatedobj/**/*.AssemblyInfo.cs/.AssemblyAttributes.csare picked up byfoo's default source glob during the solution build, producing duplicate assembly attributes (test source GivenDotnetSlnAdd.cs#L294).The failure is intermittent — the same test passes on other builds (e.g. the linux/windows dotnet.Tests partitions of build 1513455), consistent with a build-ordering/globbing race when
fooand its physically-nestedbarrestore/build in parallel. It is not caused by the PR it was seen in — #55352 only changes a GitHub Actions workflow auth token and does not touchdotnet slnor the build.Observed occurrence:
threat_detection#55352 — build 1515786Error Details
Error Message
{ "ErrorMessage": [ "failed WhenNestedProjectIsAddedSolutionFoldersAreCreatedBuild", "GivenDotnetSlnAdd.WhenNestedProjectIsAddedSolutionFoldersAreCreatedBuild" ], "BuildRetry": false, "ExcludeConsoleLog": false }Known issue validation
Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1515786
Error message validated:
[failed WhenNestedProjectIsAddedSolutionFoldersAreCreatedBuild GivenDotnetSlnAdd.WhenNestedProjectIsAddedSolutionFoldersAreCreatedBuild]Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 7/19/2026 7:19:17 AM UTC
Report
Summary