Assert.Throws() Failure: Exception type was not an exact match
Expected: typeof(System.UnauthorizedAccessException)
Actual: typeof(System.IO.IOException)
---- System.IO.IOException : Cannot create 'C:\h\w\C43509F4\t\cot4bmuh.z5w\dest\a\b' because a file or directory with the same name already exists.
at System.Formats.Tar.Tests.TarFile_ExtractToDirectory_File_Tests.ExtractToDirectory_RejectsChainedSymlinkDirectoryTraversal_WithNestedFile() in /_/src/libraries/System.Formats.Tar/tests/TarFile/TarFile.ExtractToDirectory.File.Tests.cs:line 548
----- Inner Stack Trace -----
at System.IO.FileSystem.CreateDirectory(String fullPath, Byte[] securityDescriptor) in /_/src/libraries/Common/src/System/IO/FileSystem.DirectoryCreation.Windows.cs:line 134
at System.IO.Directory.CreateDirectory(String path) in /_/src/libraries/System.Private.CoreLib/src/System/IO/Directory.cs:line 34
at System.Formats.Tar.TarHelpers.CreateDirectory(String fullPath, Nullable`1 mode, SortedDictionary`2 pendingModes) in /_/src/libraries/System.Formats.Tar/src/System/Formats/Tar/TarHelpers.Windows.cs:line 18
at System.Formats.Tar.TarEntry.ExtractRelativeToDirectory(...) in /_/src/libraries/System.Formats.Tar/src/System/Formats/Tar/TarEntry.cs:line 334
at System.Formats.Tar.TarFile.ExtractToDirectoryInternal(...) in /_/src/libraries/System.Formats.Tar/src/System/Formats/Tar/TarFile.cs:line 664
{
"ErrorMessage": [
"ExtractToDirectory_RejectsChainedSymlinkDirectoryTraversal_WithNestedFile",
"Expected: typeof(System.UnauthorizedAccessException)",
"because a file or directory with the same name already exists."
],
"ErrorPattern": "",
"BuildRetry": false,
"ExcludeConsoleLog": false
}
Build Information
Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1492983
Build error leg or test failing: Build Libraries Test Run checked coreclr windows x64 Release / x86 Debug - System.Formats.Tar.Tests.TarFile_ExtractToDirectory_File_Tests.ExtractToDirectory_RejectsChainedSymlinkDirectoryTraversal_WithNestedFile
Pull request: #130167
Error Details
Configurations observed (Windows only, ~0.25% failure rate):
Error Message
{ "ErrorMessage": [ "ExtractToDirectory_RejectsChainedSymlinkDirectoryTraversal_WithNestedFile", "Expected: typeof(System.UnauthorizedAccessException)", "because a file or directory with the same name already exists." ], "ErrorPattern": "", "BuildRetry": false, "ExcludeConsoleLog": false }Note
This issue draft was prepared with GitHub Copilot assistance and reviewed by the submitting developer.
Known issue validation
Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1492983
Error message validated:
[ExtractToDirectory_RejectsChainedSymlinkDirectoryTraversal_WithNestedFile Expected: typeof(System.UnauthorizedAccessException) because a file or directory with the same name already exists.]Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 7/3/2026 1:02:33 PM UTC
Report
Summary