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SupportedOSPlatformVersion test fails when editorconfig path exceeds MAX_PATH #56499
Description
🤖 Tracks the FullFramework Helix failure in Microsoft.NET.Build.Tests.GivenThatWeWantToBuildAWindowsDesktopProject.SupportedOSPlatformVersionCanBeSetInDirectoryBuildTargets where the generated editorconfig path exceeds the Windows path limit.
Build Information
Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1620308
Retry: Attempt 2
Leg Name: Build FullFramework: windows (x64)
Helix Job: 09e148d6-e357-42dc-8125-f3adbae9fd8d
Work Item: Microsoft.NET.Build.Tests.dll.7 / Microsoft.NET.Build.Tests.dll.8
Error Message
{
"ErrorMessage": "",
"BuildRetry": false,
"ErrorPattern": "error MSB3541: Files has invalid value \".*SupportedOSPlatformVersionCanBeSetInDirectoryBuildTargets\\.GeneratedMSBuildEditorConfig\\.editorconfig\"\\. The specified path, file name, or both are too long\\.",
"ExcludeConsoleLog": false
}The matcher uses the unique generated editorconfig filename and avoids the randomized Helix root and test directory.
Known issue validation
Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1620308
Error message validated: [error MSB3541: Files has invalid value ".*SupportedOSPlatformVersionCanBeSetInDirectoryBuildTargets\.GeneratedMSBuildEditorConfig\.editorconfig"\. The specified path, file name, or both are too long\.]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 10/5/2026 5:06:33 PM UTC
Report
Summary
| 24-Hour Hit Count | 7-Day Hit Count | 1-Month Count |
|---|---|---|
| 0 | 3 | 20 |
Activity
github-actions commentedon Oct 5, 2026
🎯 Agentic Issue Triage
Triage Assessment:
@MichaelSimons| nonemedium- Infrastructure/test-path failure on Helix; the Area-Infrastructure CODEOWNERS section is narrow, so another area is plausible.➡️ Summary: A FullFramework Helix test fails with MSB3541 because the generated editorconfig path exceeds Windows MAX_PATH. Shorten the test directory or file name, or enable long paths for the test.
Keep FullFramework test paths below MAX_PATH