System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed fails with RemoteExecutionException

[PranavSenthilnathan]

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1176081
Build error leg or test failing: System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed

Error Message

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

{
  "ErrorPattern": "Microsoft.DotNet.RemoteExecutor.RemoteExecutionException.*/_/src/libraries/System.Net.Http/tests/UnitTests/HttpWindowsProxyTest.cs\\(165,0\\): at System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1176081
Error message validated: [Microsoft.DotNet.RemoteExecutor.RemoteExecutionException.*/_/src/libraries/System.Net.Http/tests/UnitTests/HttpWindowsProxyTest.cs\(165,0\): at System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed]
Result validation: ❌ Known issue did not match with the provided build.
Validation performed at: 10/16/2025 6:44:18 PM UTC

Report

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
0	0	0

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[PranavSenthilnathan]

This is related to #120577 but BA seems to not recognize it. Is it possible to backport #120736 to release/9.0 (where we are seeing this failure)?

Process terminated. Assertion failed.
Interop.Sys.LSeek(this, 0, Interop.Sys.SeekWhence.SEEK_CUR) >= 0
   at Microsoft.Win32.SafeHandles.SafeFileHandle.Init(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Int64& fileLength, UnixFileMode& filePermissions) in /_/src/libraries/System.Private.CoreLib/src/Microsoft/Win32/SafeHandles/SafeFileHandle.Unix.cs:line 347
   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 219
   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
   at System.IO.StreamReader.ValidateArgsAndOpenPath(String path, Encoding encoding, Int32 bufferSize) in /_/src/libraries/System.Private.CoreLib/src/System/IO/StreamReader.cs:line 234
   at System.IO.File.ReadAllLines(String path, Encoding encoding) in /_/src/libraries/System.Private.CoreLib/src/System/IO/File.cs:line 869
   at System.Net.NetworkInformation.LinuxNetworkInterface.LinuxNetworkInterfaceSystemProperties..ctor() in /_/src/libraries/System.Net.NetworkInformation/src/System/Net/NetworkInformation/LinuxNetworkInterface.cs:line 36
   at System.Net.NetworkInformation.LinuxNetworkInterface.GetLinuxNetworkInterfaces() in /_/src/libraries/System.Net.NetworkInformation/src/System/Net/NetworkInformation/LinuxNetworkInterface.cs:line 74
   at System.Net.NetworkInformation.NetworkInterfacePal.GetAllNetworkInterfaces() in /_/src/libraries/System.Net.NetworkInformation/src/System/Net/NetworkInformation/NetworkInterfacePal.Linux.cs:line 11
   at System.Net.NetworkInformation.NetworkInterface.GetAllNetworkInterfaces() in /_/src/libraries/System.Net.NetworkInformation/src/System/Net/NetworkInformation/NetworkInterface.cs:line 18
   at System.Net.Http.HttpWindowsProxy.UpdateConfiguration(WinInetProxyHelper proxyHelper) in /_/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/HttpWindowsProxy.cs:line 178
   at System.Net.Http.HttpWindowsProxy..ctor(WinInetProxyHelper proxy) in /_/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/HttpWindowsProxy.cs:line 47
   at System.Net.Http.Tests.HttpWindowsProxyTest.<>c.<HttpProxy_Local_Bypassed>b__17_0(String url, String expected) in /_/src/libraries/System.Net.Http/tests/UnitTests/HttpWindowsProxyTest.cs:line 173
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Void** arguments, Signature sig, Boolean isConstructor)
   at System.Reflection.MethodBaseInvoker.InvokeDirectByRefWithFewArgs(Object obj, Span`1 copyOfArgs, BindingFlags invokeAttr) in /_/src/libraries/System.Private.CoreLib/src/System/Reflection/MethodBaseInvoker.cs:line 174
   at System.Reflection.MethodBaseInvoker.InvokeWithFewArgs(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) in /_/src/libraries/System.Private.CoreLib/src/System/Reflection/MethodBaseInvoker.cs:line 145
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) in /_/src/libraries/System.Private.CoreLib/src/System/Reflection/RuntimeMethodInfo.cs:line 128
   at Microsoft.DotNet.RemoteExecutor.Program.Main(String[] args) in /_/src/Microsoft.DotNet.RemoteExecutor/src/Program.cs:line 57
[createdump] Gathering state for process 14653 dotnet
[createdump] Crashing thread 393d signal 6 (0006)
[createdump] Writing crash report to file /datadisks/disk1/dumps/coredump.14653.dmp.crashreport.json
[createdump] Crash report successfully written
[createdump] Writing minidump with heap to file /datadisks/disk1/dumps/coredump.14653.dmp
[createdump] Written 82321408 bytes (20098 pages) to core file
[createdump] Target process is alive
[createdump] Dump successfully written in 540ms
waitpid() returned successfully (wstatus 00000000) WEXITSTATUS 0 WTERMSIG 0
    System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed(name: "http://www.bébé.eu/", shouldBypass: True) [FAIL]
      Microsoft.DotNet.RemoteExecutor.RemoteExecutionException : Exit code was 134 but it should have been 42
      Stack Trace:
        /_/src/Microsoft.DotNet.RemoteExecutor/src/RemoteInvokeHandle.cs(242,0): at Microsoft.DotNet.RemoteExecutor.RemoteInvokeHandle.Dispose(Boolean disposing)
        /_/src/libraries/System.Private.CoreLib/src/System/Threading/ExecutionContext.cs(264,0): at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state)
        --- End of stack trace from previous location ---
        /_/src/libraries/System.Private.CoreLib/src/System/Threading/ExecutionContext.cs(289,0): at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state)
        /_/src/libraries/System.Private.CoreLib/src/System/Threading/Tasks/Task.cs(2346,0): at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread)
        --- End of stack trace from previous location ---
        /_/src/libraries/Common/tests/System/Net/RemoteExecutorExtensions.cs(24,0): at Microsoft.DotNet.RemoteExecutor.RemoteExecutorExtensions.DisposeAsync(RemoteInvokeHandle handle)
        /_/src/libraries/System.Net.Http/tests/UnitTests/HttpWindowsProxyTest.cs(165,0): at System.Net.Http.Tests.HttpWindowsProxyTest.HttpProxy_Local_Bypassed(String name, Boolean shouldBypass)
        --- End of stack trace from previous location ---
  Finished:    System.Net.Http.Unit.Tests

[rzikm]

Duplicate of #120577, we will backport the fix.