Assertion failure: DriveInfo.PropertiesOfValidDrive reports DriveType 'Unknown' on Android (arm/arm64/x64/x86)

[matouskozak]

Note: This issue was automatically generated by AI-Test-Triage. Please review and triage accordingly.

Build Information

Build: 20260122.4

Build error leg or test failing: System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive, System.IO.FileSystem.DriveInfo.Tests.WorkItemExecution

Affected CI jobs: android_arm64_Release_AllSubsets_Mono, android_arm64_Release_NativeAOT, android_arm64_Release_AllSubsets_CoreCLR, android_arm_Release_AllSubsets_Mono, android_x64_Release_AllSubsets_CoreCLR, android_x64_Release_AllSubsets_Mono, android_x86_Release_AllSubsets_Mono, android_x64_Release_NativeAOT

Causing Commit Range Information

Commit range: View Changes

• Last passing build: 20260122.1 --- dotnet/runtime-e991b26
• First failing build: 20260122.4 --- dotnet/runtime-4b5d314

Summary

• Assert.Equal failure in DriveInfoUnixTests.PropertiesOfValidDrive: expected DriveType 'Fixed' but actual 'Unknown'.
• Reproduced across Android architectures (arm, arm64, x64, x86) and runtimes (Mono, CoreCLR, NativeAOT), indicating a platform-wide issue.
• CanGetTempPathDriveFormat fails Assert.NotEmpty (collection empty), indicating missing drive discovery data.
• SELinux AVC denials (search/getattr on vendor/metadata/firmware) appear before failures, suggesting permissioning/infrastructure blockage.
• Test assembly exits non-zero and multiple DriveInfo tests fail, indicating an environment-level failure of drive discovery APIs.

Failure Statistics

Note: These statistics are based on the configured time range and do not contain full test history.

• Occurrence Count: 8
• First Failure: 2026-01-22 21:00:00 UTC
• Last Failure: 2026-01-22 21:00:00 UTC

Work Items

Work Item	Console Log	Build	Job Name
System.IO.FileSystem.DriveInfo.Tests	View Extract 01-22 14:05:33.284 4604 4895 D DOTNET : assembly_preload_hook: TestUtilities /data/user/0/net.dot.System.IO.FileSystem.DriveInfo.Tests/files 01-22 14:05:33.293 4604 4895 I DOTNET : [PASS] System.IO.FileSystem.Tests.DriveInfoUnixTests.TestConstructor 01-22 14:05:33.359 4604 4895 I DOTNET : [FAIL] System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive 01-22 14:05:33.359 4604 4895 I DOTNET : Assert.Equal() Failure: Values differ 01-22 14:05:33.359 4604 4895 I DOTNET : Expected: Fixed 01-22 14:05:33.359 4604 4895 I DOTNET : Actual: Unknown 01-22 14:05:33.359 4604 4895 I DOTNET : at System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive() 01-22 14:05:33.367 4604 4895 I DOTNET : [PASS] System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfInvalidDrive 01-22 14:05:33.370 4604 4895 I DOTNET : [FAIL] System.IO.FileSystem.Tests.DriveInfoUnixTests.CanGetTempPathDriveFormat ... 01-22 14:05:33.446 4604 4895 I DOTNET : Failed tests: 01-22 14:05:33.447 4604 4895 I DOTNET : 1) [FAIL] System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive Test name: System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive 01-22 14:05:33.447 4604 4895 I DOTNET : Exception messages: Assert.Equal() Failure: Values differ 01-22 14:05:33.447 4604 4895 I DOTNET : Expected: Fixed 01-22 14:05:33.447 4604 4895 I DOTNET : Actual: Unknown 01-22 14:05:33.447 4604 4895 I DOTNET : 2) [FAIL] System.IO.FileSystem.Tests.DriveInfoUnixTests.CanGetTempPathDriveFormat 01-22 14:05:33.447 4604 4895 I DOTNET : Exception messages: Assert.NotEmpty() Failure: Collection was empty 01-22 14:05:33.447 4604 4895 I DOTNET : Execution time: 0.0353195 Full Log	20260122.4	android_arm64_Release_AllSubsets_Mono
System.IO.FileSystem.DriveInfo.Tests	View Extract 01-22 14:59:33.516 19193 19219 I DOTNET : [FAIL] System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive 01-22 14:59:33.516 19193 19219 I DOTNET : Assert.Equal() Failure: Values differ 01-22 14:59:33.516 19193 19219 I DOTNET : Expected: Fixed 01-22 14:59:33.516 19193 19219 I DOTNET : Actual: Unknown 01-22 14:59:33.517 19193 19219 I DOTNET : [FAIL] System.IO.FileSystem.Tests.DriveInfoUnixTests.CanGetTempPathDriveFormat 01-22 14:59:33.517 19193 19219 I DOTNET : Assert.NotEmpty() Failure: Collection was empty 01-22 14:59:33.518 19193 19219 I DOTNET : Finished System.IO.FileSystem.DriveInfo.Tests, Version=11.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51 01-22 14:59:33.518 19193 19219 I DOTNET : Tests run: 6, Errors: 0, Failures: 2, Skipped: 0. Time: 0.008432s INSTRUMENTATION_RESULT: return-code=1 [14:59:36] fail: Non-success instrumentation exit code: 1, expected: 0 XHarness exit code: 1 (TESTS_FAILED) Full Log	20260122.4	android_arm64_Release_NativeAOT
System.IO.FileSystem.DriveInfo.Tests	View Extract 01-22 14:14:08.866 20046 20046 W net.dot.System.IO.FileSystem.DriveInfo.Tests: type=1400 audit(0.0:147902): avc: denied { search } for comm=2E4E455420545020576F726B6572 name="vendor" dev="tmpfs" ino=2 scontext=u:r:untrusted_app_30:s0:c238,c281,c512,c768 tcontext=u:object_r:mnt_vendor_file:s0 tclass=dir permissive=0 app=net.dot.System.IO.FileSystem.DriveInfo.Tests 01-22 14:14:08.866 20046 20046 W net.dot.System.IO.FileSystem.DriveInfo.Tests: type=1400 audit(0.0:147903): avc: denied { search } for comm=2E4E455420545020576F726B6572 name="vendor" dev="tmpfs" ino=2 scontext=u:r:untrusted_app_30:s0:c238,c281,c512,c768 tcontext=u:object_r:mnt_vendor_file:s0 tclass=dir permissive=0 app=net.dot.System.IO.FileSystem.DriveInfo.Tests 01-22 14:14:08.879 20046 20238 I DOTNET : [PASS] System.IO.FileSystem.Tests.DriveInfoUnixTests.TestGetDrives 01-22 14:14:08.892 20046 20238 I DOTNET : [PASS] System.IO.FileSystem.Tests.DriveInfoUnixTests.TestConstructor 01-22 14:14:08.969 20046 20238 I DOTNET : [FAIL] System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive 01-22 14:14:08.969 20046 20238 I DOTNET : Assert.Equal() Failure: Values differ 01-22 14:14:08.969 20046 20238 I DOTNET : Expected: Fixed 01-22 14:14:08.969 20046 20238 I DOTNET : Actual: Unknown 01-22 14:14:08.969 20046 20238 I DOTNET : at System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive() 01-22 14:14:08.973 20046 20238 I DOTNET : [PASS] System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfInvalidDrive 01-22 14:14:08.974 20046 20238 I DOTNET : [FAIL] System.IO.FileSystem.Tests.DriveInfoUnixTests.CanGetTempPathDriveFormat 01-22 14:14:08.974 20046 20238 I DOTNET : Assert.NotEmpty() Failure: Collection was empty 01-22 14:14:08.993 20046 20238 I DOTNET : Failed tests: 01-22 14:14:08.993 20046 20238 I DOTNET : 1) [FAIL] System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive Test name: System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive 01-22 14:14:08.993 20046 20238 I DOTNET : Exception messages: Assert.Equal() Failure: Values differ 01-22 14:14:08.993 20046 20238 I DOTNET : Expected: Fixed 01-22 14:14:08.993 20046 20238 I DOTNET : Actual: Unknown Full Log	20260122.4	android_arm64_Release_AllSubsets_CoreCLR
System.IO.FileSystem.DriveInfo.Tests	View Extract 01-22 13:53:58.254 18503 18503 W net.dot.System.IO.FileSystem.DriveInfo.Tests: type=1400 audit(0.0:329468): avc: denied { search } for comm=2E4E455420545020576F726B6572 name="vendor" dev="tmpfs" ino=20954 scontext=u:r:untrusted_app_30:s0:c57,c266,c512,c768 tcontext=u:object_r:mnt_vendor_file:s0 tclass=dir permissive=0 app=net.dot.System.IO.FileSystem.DriveInfo.Tests 01-22 13:53:58.254 18503 18503 W net.dot.System.IO.FileSystem.DriveInfo.Tests: type=1400 audit(0.0:329470): avc: denied { getattr } for comm=2E4E455420545020576F726B6572 path="/metadata" dev="sda11" ino=2 scontext=u:r:untrusted_app_30:s0:c57,c266,c512,c768 tcontext=u:object_r:metadata_file:s0 tclass=dir permissive=0 app=net.dot.System.IO.FileSystem.DriveInfo.Tests 01-22 13:53:58.270 18503 18590 I DOTNET : [PASS] System.IO.FileSystem.Tests.DriveInfoUnixTests.TestGetDrives 01-22 13:53:58.300 18503 18590 I DOTNET : [PASS] System.IO.FileSystem.Tests.DriveInfoUnixTests.TestConstructor 01-22 13:53:58.350 18503 18590 I DOTNET : [FAIL] System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive 01-22 13:53:58.350 18503 18590 I DOTNET : Assert.Equal() Failure: Values differ 01-22 13:53:58.350 18503 18590 I DOTNET : Expected: Fixed 01-22 13:53:58.350 18503 18590 I DOTNET : Actual: Unknown 01-22 13:53:58.358 18503 18590 I DOTNET : [FAIL] System.IO.FileSystem.Tests.DriveInfoUnixTests.CanGetTempPathDriveFormat 01-22 13:53:58.358 18503 18590 I DOTNET : Assert.NotEmpty() Failure: Collection was empty 01-22 13:53:58.393 18503 18590 I DOTNET : Failed tests: 01-22 13:53:58.393 18503 18590 I DOTNET : 1) [FAIL] System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive Test name: System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive 01-22 13:53:58.394 18503 18590 I DOTNET : 2) [FAIL] System.IO.FileSystem.Tests.DriveInfoUnixTests.CanGetTempPathDriveFormat Test name: System.IO.FileSystem.Tests.DriveInfoUnixTests.CanGetTempPathDriveFormat Full Log	20260122.4	android_arm_Release_AllSubsets_Mono
System.IO.FileSystem.DriveInfo.Tests	View Extract 01-22 22:26:37.721 7280 7298 D DOTNET : Mapped System.Collections.Immutable.dll -> /data/user/0/net.dot.System.IO.FileSystem.DriveInfo.Tests/files/System.Collections.Immutable.dll 01-22 22:26:37.754 7280 7298 D DOTNET : Mapped System.IO.Compression.dll -> /data/user/0/net.dot.System.IO.FileSystem.DriveInfo.Tests/files/System.IO.Compression.dll 01-22 22:26:37.842 7280 7298 I DOTNET : [FAIL] System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive 01-22 22:26:37.842 7280 7298 I DOTNET : Assert.Equal() Failure: Values differ 01-22 22:26:37.842 7280 7298 I DOTNET : Expected: Fixed 01-22 22:26:37.842 7280 7298 I DOTNET : Actual: Unknown 01-22 22:26:37.842 7280 7298 I DOTNET : at System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive() 01-22 22:26:37.850 7280 7298 I DOTNET : [PASS] System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfInvalidDrive 01-22 22:26:37.852 7280 7298 I DOTNET : Assert.NotEmpty() Failure: Collection was empty 01-22 22:26:37.852 7280 7298 I DOTNET : at System.IO.FileSystem.Tests.DriveInfoUnixTests.CanGetTempPathDriveFormat() 01-22 22:26:37.921 7280 7298 I DOTNET : Failed tests: 01-22 22:26:37.922 7280 7298 I DOTNET : 1) [FAIL] System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive Test name: System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive 01-22 22:26:37.922 7280 7298 I DOTNET : Exception messages: Assert.Equal() Failure: Values differ 01-22 22:26:37.922 7280 7298 I DOTNET : Expected: Fixed 01-22 22:26:37.922 7280 7298 I DOTNET : Actual: Unknown 01-22 22:26:37.922 7280 7298 I DOTNET : at System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive() 01-22 22:26:37.922 7280 7298 I DOTNET : Execution time: 0.020562 Full Log	20260122.4	android_x64_Release_AllSubsets_CoreCLR
System.IO.FileSystem.DriveInfo.Tests	View Extract 01-22 22:16:25.806 4008 4028 D DOTNET : assembly_preload_hook: System.IO.FileSystem.DriveInfo /data/user/0/net.dot.System.IO.FileSystem.DriveInfo.Tests/files 01-22 22:16:26.033 4008 4028 I DOTNET : [PASS] System.IO.FileSystem.Tests.DriveInfoUnixTests.TestGetDrives 01-22 22:16:26.261 4008 4028 I DOTNET : [PASS] System.IO.FileSystem.Tests.DriveInfoUnixTests.TestConstructor 01-22 22:16:26.519 4008 4028 I DOTNET : [FAIL] System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive 01-22 22:16:26.519 4008 4028 I DOTNET : Assert.Equal() Failure: Values differ 01-22 22:16:26.519 4008 4028 I DOTNET : Expected: Fixed 01-22 22:16:26.519 4008 4028 I DOTNET : Actual: Unknown 01-22 22:16:26.519 4008 4028 I DOTNET : at System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive() 01-22 22:16:26.557 4008 4028 I DOTNET : [PASS] System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfInvalidDrive 01-22 22:16:26.568 4008 4028 I DOTNET : [FAIL] System.IO.FileSystem.Tests.DriveInfoUnixTests.CanGetTempPathDriveFormat 01-22 22:16:26.568 4008 4028 I DOTNET : Assert.NotEmpty() Failure: Collection was empty 01-22 22:16:26.826 4008 4028 I DOTNET : Failed tests: 01-22 22:16:26.826 4008 4028 I DOTNET : 1) [FAIL] System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive Test name: System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive 01-22 22:16:26.826 4008 4028 I DOTNET : Exception messages: Assert.Equal() Failure: Values differ 01-22 22:16:26.826 4008 4028 I DOTNET : Expected: Fixed 01-22 22:16:26.826 4008 4028 I DOTNET : Actual: Unknown 01-22 22:16:26.826 4008 4028 I DOTNET : 2) [FAIL] System.IO.FileSystem.Tests.DriveInfoUnixTests.CanGetTempPathDriveFormat Test name: System.IO.FileSystem.Tests.DriveInfoUnixTests.CanGetTempPathDriveFormat 01-22 22:16:26.826 4008 4028 I DOTNET : Exception messages: Assert.NotEmpty() Failure: Collection was empty Full Log	20260122.4	android_x64_Release_AllSubsets_Mono
System.IO.FileSystem.DriveInfo.Tests	View Extract 01-22 22:08:04.905 4224 4244 D DOTNET : assembly_preload_hook: System.Diagnostics.Tracing /data/user/0/net.dot.System.IO.FileSystem.DriveInfo.Tests/files 01-22 22:08:05.195 4224 4244 I DOTNET : [PASS] System.IO.FileSystem.Tests.DriveInfoUnixTests.TestGetDrives 01-22 22:08:05.404 4224 4244 I DOTNET : [PASS] System.IO.FileSystem.Tests.DriveInfoUnixTests.TestConstructor 01-22 22:08:05.685 4224 4244 I DOTNET : [FAIL] System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive 01-22 22:08:05.685 4224 4244 I DOTNET : Assert.Equal() Failure: Values differ 01-22 22:08:05.685 4224 4244 I DOTNET : Expected: Fixed 01-22 22:08:05.685 4224 4244 I DOTNET : Actual: Unknown 01-22 22:08:05.685 4224 4244 I DOTNET : at System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive() 01-22 22:08:05.734 4224 4244 I DOTNET : [PASS] System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfInvalidDrive 01-22 22:08:05.744 4224 4244 I DOTNET : [FAIL] System.IO.FileSystem.Tests.DriveInfoUnixTests.CanGetTempPathDriveFormat 01-22 22:08:05.744 4224 4244 I DOTNET : Assert.NotEmpty() Failure: Collection was empty 01-22 22:08:06.014 4224 4244 I DOTNET : Failed tests: 01-22 22:08:06.016 4224 4244 I DOTNET : 1) [FAIL] System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive Test name: System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive 01-22 22:08:06.018 4224 4244 I DOTNET : Exception messages: Assert.Equal() Failure: Values differ 01-22 22:08:06.018 4224 4244 I DOTNET : Expected: Fixed 01-22 22:08:06.018 4224 4244 I DOTNET : Actual: Unknown 01-22 22:08:06.019 4224 4244 I DOTNET : 2) [FAIL] System.IO.FileSystem.Tests.DriveInfoUnixTests.CanGetTempPathDriveFormat Test name: System.IO.FileSystem.Tests.DriveInfoUnixTests.CanGetTempPathDriveFormat 01-22 22:08:06.019 4224 4244 I DOTNET : Exception messages: Assert.NotEmpty() Failure: Collection was empty Full Log	20260122.4	android_x86_Release_AllSubsets_Mono
System.IO.FileSystem.DriveInfo.Tests	View Extract 01-22 23:07:43.490 3980 4002 I DOTNET : [FAIL] System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive 01-22 23:07:43.490 3980 4002 I DOTNET : Assert.Equal() Failure: Values differ 01-22 23:07:43.490 3980 4002 I DOTNET : Expected: Fixed 01-22 23:07:43.490 3980 4002 I DOTNET : Actual: Unknown 01-22 23:07:43.493 3980 4002 I DOTNET : [FAIL] System.IO.FileSystem.Tests.DriveInfoUnixTests.CanGetTempPathDriveFormat 01-22 23:07:43.493 3980 4002 I DOTNET : Assert.NotEmpty() Failure: Collection was empty 01-22 23:07:43.494 3980 4002 I DOTNET : Finished System.IO.FileSystem.DriveInfo.Tests, Version=11.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51 01-22 23:07:43.495 3980 4002 I DOTNET : Tests run: 6, Errors: 0, Failures: 2, Skipped: 0. Time: 0.0166214s 01-22 23:07:43.495 3980 3999 I DOTNET : MonoRunner finished, return-code=1 01-22 23:07:43.539 1670 1670 I Zygote : Process 3980 exited due to signal 9 (Killed) INSTRUMENTATION_RESULT: return-code=1 INSTRUMENTATION_CODE: 1 [23:07:47] info: Instrumentation finished normally with exit code 1 XHarness exit code: 1 (TESTS_FAILED) Full Log	20260122.4	android_x64_Release_NativeAOT

Error Message

{
  "ErrorMessage": [
    "Assert.Equal() Failure: Values differ",
    "Expected: Fixed",
    "Actual:   Unknown"
  ],
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1263525
Error message validated: [Assert.Equal() Failure: Values differ Expected: Fixed Actual: Unknown]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 1/23/2026 3:36:10 PM UTC

Report

Build	Definition	Test	Pull Request
1270185	dotnet/runtime	System.IO.FileSystem.DriveInfo.Tests.WorkItemExecution
1269569	dotnet/runtime	System.IO.FileSystem.DriveInfo.Tests.WorkItemExecution
1268695	dotnet/runtime	System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive
1268014	dotnet/runtime	System.IO.FileSystem.DriveInfo.Tests.WorkItemExecution
1267156	dotnet/runtime	System.IO.FileSystem.DriveInfo.Tests.WorkItemExecution
1266509	dotnet/runtime	System.IO.FileSystem.DriveInfo.Tests.WorkItemExecution
1266257	dotnet/runtime	System.IO.FileSystem.DriveInfo.Tests.WorkItemExecution
1265954	dotnet/runtime	System.IO.FileSystem.DriveInfo.Tests.WorkItemExecution
1265645	dotnet/runtime	System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive
1265579	dotnet/runtime	System.IO.FileSystem.DriveInfo.Tests.WorkItemExecution	#123248
1264989	dotnet/runtime	System.IO.FileSystem.DriveInfo.Tests.WorkItemExecution
1264235	dotnet/runtime	System.IO.FileSystem.DriveInfo.Tests.WorkItemExecution
1263525	dotnet/runtime	System.IO.FileSystem.DriveInfo.Tests.WorkItemExecution

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
2	13	13

[dotnet-policy-service]

Tagging subscribers to 'arch-android': @vitek-karas, @simonrozsival, @steveisok, @akoeplinger
See info in area-owners.md if you want to be subscribed.

[dotnet-policy-service]

Tagging subscribers to this area: @dotnet/area-system-io
See info in area-owners.md if you want to be subscribed.

[am11]

@tmds, these two are failing on android:

runtime/src/libraries/System.IO.FileSystem.DriveInfo/tests/DriveInfo.Unix.Tests.cs

Line 64 in b19edc0

public void PropertiesOfValidDrive()

runtime/src/libraries/System.IO.FileSystem.DriveInfo/tests/DriveInfo.Unix.Tests.cs

Line 100 in b19edc0

public void CanGetTempPathDriveFormat()

pipeline: runtime-extra-platforms
console log: https://helixr1107v0xdeko0k025g8.blob.core.windows.net/dotnet-runtime-refs-heads-main-141bae37d7144fae9b/System.IO.FileSystem.DriveInfo.Tests/1/console.4a967e58.log?helixlogtype=result

       01-22 13:53:58.350 18503 18590 I DOTNET  : Assert.Equal() Failure: Values differ
                 01-22 13:53:58.350 18503 18590 I DOTNET  : Expected: Fixed
                 01-22 13:53:58.350 18503 18590 I DOTNET  : Actual:   Unknown
                 01-22 13:53:58.350 18503 18590 I DOTNET  :    at System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive()
                 01-22 13:53:58.350 18503 18590 I DOTNET  :    at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
                 01-22 13:53:58.350 18503 18590 I DOTNET  :    at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
                 01-22 13:53:58.356 18503 18590 I DOTNET  : 	[PASS] System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfInvalidDrive
                 01-22 13:53:58.358 18503 18590 I DOTNET  : 	[FAIL] System.IO.FileSystem.Tests.DriveInfoUnixTests.CanGetTempPathDriveFormat
                 01-22 13:53:58.358 18503 18590 I DOTNET  : Assert.NotEmpty() Failure: Collection was empty
                 01-22 13:53:58.358 18503 18590 I DOTNET  :    at System.IO.FileSystem.Tests.DriveInfoUnixTests.CanGetTempPathDriveFormat()
                 01-22 13:53:58.358 18503 18590 I DOTNET  :    at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
                 01-22 13:53:58.358 18503 18590 I DOTNET  :    at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
                 01-22 13:53:58.359 18503 18590 I DOTNET  : 	[PASS] System.IO.FileSystem.Tests.DriveInfoUnixTests.SetVolumeLabel_Throws_PlatformNotSupportedException
                 01-22 13:53:58.367 18503 18590 I DOTNET  : System.IO.FileSystem.Tests.DriveInfoUnixTests 0.0878511 ms
                 01-22 13:53:58.393 18503 18590 I DOTNET  : Failed tests:
                 01-22 13:53:58.393 18503 18590 I DOTNET  : 1) 	[FAIL] System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive   Test name: System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive
                 01-22 13:53:58.393 18503 18590 I DOTNET  :    Assembly:  [System.IO.FileSystem.DriveInfo.Tests, Version=11.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51]
                 01-22 13:53:58.393 18503 18590 I DOTNET  :    Exception messages: Assert.Equal() Failure: Values differ
                 01-22 13:53:58.393 18503 18590 I DOTNET  : Expected: Fixed
                 01-22 13:53:58.393 18503 18590 I DOTNET  : Actual:   Unknown   Exception stack traces:    at System.IO.FileSystem.Tests.DriveInfoUnixTests.PropertiesOfValidDrive()
                 01-22 13:53:58.393 18503 18590 I DOTNET  :    at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
                 01-22 13:53:58.393 18503 18590 I DOTNET  :    at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
                 01-22 13:53:58.393 18503 18590 I DOTNET  :    Execution time: 0.0281222
                 01-22 13:53:58.393 18503 18590 I DOTNET  : 2) 	[FAIL] System.IO.FileSystem.Tests.DriveInfoUnixTests.CanGetTempPathDriveFormat   Test name: System.IO.FileSystem.Tests.DriveInfoUnixTests.CanGetTempPathDriveFormat
                 01-22 13:53:58.394 18503 18590 I DOTNET  :    Assembly:  [System.IO.FileSystem.DriveInfo.Tests, Version=11.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51]
                 01-22 13:53:58.394 18503 18590 I DOTNET  :    Exception messages: Assert.NotEmpty() Failure: Collection was empty   Exception stack traces:    at System.IO.FileSystem.Tests.DriveInfoUnixTests.CanGetTempPathDriveFormat()
                 01-22 13:53:58.394 18503 18590 I DOTNET  :    at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
                 01-22 13:53:58.394 18503 18590 I DOTNET  :    at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
                 01-22 13:53:58.394 18503 18590 I DOTNET  :    Execution time: 0.0011743
                 01-22 13:53:58.396 18503 18590 D DOTNET  : assembly_preload_hook: System.Xml.ReaderWriter  /data/user/0/net.dot.System.IO.FileSystem.DriveInfo.Tests/files
                 01-22 13:53:58.444 18503 18590 I DOTNET  : Xml file was written to the provided writer.
                 01-22 13:53:58.447 18503 18590 I DOTNET  : === TEST EXECUTION SUMMARY ===
                 01-22 13:53:58.447 18503 18590 I DOTNET  : Tests run: 6 Passed: 4 Inconclusive: 0 Failed: 2 Ignored: 0 Skipped: 0

Possible fix:

--- a/src/libraries/Common/src/Interop/Unix/System.Native/Interop.MountPoints.FormatInfo.cs
+++ b/src/libraries/Common/src/Interop/Unix/System.Native/Interop.MountPoints.FormatInfo.cs
@@ -25,7 +25,7 @@ internal struct MountPointInformation
 
         internal static unsafe Error GetFileSystemTypeNameForMountPoint(string name, out string format)
         {
-            if (OperatingSystem.IsLinux())
+            if (OperatingSystem.IsLinux() || OperatingSystem.IsAndroid())
             {
                 // Canonicalize and resolve symbolic links.
                 string? path = Sys.RealPath(name);

(best effort)

BTW, in the PR, we should request maintainers to run runtime-extra-platforms pipeline to avoid multiple cycles.

[tmds]

Possible fix

Lgtm. Let's see if CI is happy with it too.