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Assert Interop.Sys.LSeek(this, 0, Interop.Sys.SeekWhence.SEEK_CUR) >= 0 in System.Net.XXX tests #120577

@janvorli

Description

@janvorli

Several System.Net.XXX tests like System.Net.NetworkInformation.Functional.Tests, System.Net.Primitives.Pal.Tests, System.Net.Quic.Functional.Tests are failing in the CI with

Assertion failed.
Interop.Sys.LSeek(this, 0, Interop.Sys.SeekWhence.SEEK_CUR) >= 0
   at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, UnixFileMode openPermissions, Int64& fileLength, UnixFileMode& filePermissions, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException) in /_/src/libraries/System.Private.CoreLib/src/Microsoft/Win32/SafeHandles/SafeFileHandle.Unix.cs:line 208
   at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode) in /_/src/libraries/System.Private.CoreLib/src/System/IO/Strategies/OSFileStreamStrategy.cs:line 46
etc...

See e.g.
https://dev.azure.com/dnceng-public/public/_build/results?buildId=1168801&view=ms.vss-test-web.build-test-results-tab&runId=32334092&resultId=218135&paneView=debug

Known Issue Error Message

Fill the error message using step by step known issues guidance.

{
  "ErrorMessage": ["Assertion failed.","Interop.Sys.LSeek"],
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1168801
Error message validated: [Assertion failed. Interop.Sys.LSeek]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 10/9/2025 8:43:26 PM UTC

Report

Build Definition Test Pull Request
1174969 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120666
1174954 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed
1174931 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120583
1174941 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120735
1173941 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120695
1174682 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120685
1174834 dotnet/runtime System.Net.Quic.Functional.Tests.WorkItemExecution
1174871 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #117333
1174479 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120698
1174685 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120704
1174830 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed
1174807 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120730
1174571 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120723
1174567 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120583
1174424 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120685
1174514 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed
1174437 dotnet/runtime System.Net.Quic.Functional.Tests.WorkItemExecution
1174379 dotnet/runtime System.Net.Quic.Functional.Tests.WorkItemExecution
1174419 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120281
1174399 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120670
1174052 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120704
1174375 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed
1174361 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed
1174339 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120720
1174335 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120585
1173992 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120684
1174253 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120666
1174203 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120298
1174173 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120411
1174160 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120519
1174153 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120690
1174127 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120685
1174137 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120712
1174111 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120571
1169836 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120521
1173950 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120696
1174017 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120698
1173893 dotnet/runtime System.Net.Quic.Functional.Tests.WorkItemExecution
1173934 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120411
1173918 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120667
1173888 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed
1173894 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120693
1173838 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120684
1173809 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120411
1173770 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120685
1173665 dotnet/runtime System.Net.Quic.Functional.Tests.WorkItemExecution
1173708 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120688
1169691 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120572
1173613 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120690
1173622 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed
1173599 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120688
1173493 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120674
1173487 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120677
1173408 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120686
1173309 dotnet/runtime System.Net.Quic.Functional.Tests.WorkItemExecution
1173364 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120684
1173355 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120454
1173311 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120682
1173304 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed
1173269 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120534
1173253 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120677
1173247 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120676
1173214 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120678
1173203 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed
1173096 dotnet/runtime System.Net.Quic.Functional.Tests.WorkItemExecution
1173133 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120459
1173119 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120674
1173109 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120675
1172962 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120519
1173071 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed
1173045 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120454
1173041 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #119802
1173025 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed
1172979 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120615
1172928 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120671
1172924 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120666
1172865 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed
1172891 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120583
1172790 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120454
1172695 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120592
1172646 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120665
1172641 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120667
1172448 dotnet/runtime System.Net.Quic.Functional.Tests.WorkItemExecution
1172501 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120658
1172486 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #119492
1172442 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120462
1172439 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120602
1172455 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120657
1172416 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed
1172383 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120642
1172320 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120654
1172345 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120655
1172109 dotnet/runtime System.Net.Quic.Functional.Tests.WorkItemExecution
1172247 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120633
1172239 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120648
1172175 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120462
1172121 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120648
1172072 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed
1172037 dotnet/runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed #120648
2814087 dotnet-runtime System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed
Displaying 100 of 188 results

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Known Build ErrorUse this to report build issues in the .NET Helix tabarea-System.Netblocking-clean-ciBlocking PR or rolling runs of 'runtime' or 'runtime-extra-platforms'

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