browser-wasm windows Debug AllSubsets_CoreCLR builds failing in emcc seemingly unrelated to any code issues

[jkoritzinsky]

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1067658 Build error leg or test failing: browser-wasm windows Debug AllSubsets_CoreCLR

Error Message

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

{
  "ErrorMessage": "sys.exit(emcc.main(sys.argv))",
  "BuildRetry": true,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: :mag_right: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1067658 Error message validated: [sys.exit(emcc.main(sys.argv))] Result validation: :white_check_mark: Known issue matched with the provided build. Validation performed at: 6/13/2025 6:41:53 PM UTC

Report

Build	Definition	Step Name	Console log	Pull Request
1067979	dotnet/runtime	Build product	Log	dotnet/runtime#116590
1068063	dotnet/runtime	Build product	Log	dotnet/runtime#116354
1068015	dotnet/runtime	Build product	Log	dotnet/runtime#115265
1067903	dotnet/runtime	Build product	Log	dotnet/runtime#116626
1067719	dotnet/runtime	Build product	Log	dotnet/runtime#115265
1067658	dotnet/runtime	Build product	Log	dotnet/runtime#116563
1067636	dotnet/runtime	Build product	Log	dotnet/runtime#116619

Summary

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

[dotnet-policy-service[bot]]

Tagging subscribers to 'arch-wasm': @lewing See info in area-owners.md if you want to be subscribed.

[dotnet-policy-service[bot]]

Tagging subscribers to this area: @akoeplinger, @matouskozak, @simonrozsival See info in area-owners.md if you want to be subscribed.

[lewing]

Likely the same problem as https://github.com/dotnet/runtime/issues/116746 and https://github.com/dotnet/runtime/issues/116671

[radekdoulik]

From the chat on First Responders it looks like the machine images were changed way earlier than the start of these issues.

We are now trying to confirm our theory, that it can be Defender intercepting the build. https://github.com/dotnet/runtime/pull/116791

[lewing]

Example failure:

2025-06-20T12:51:02.3032584Z   Traceback (most recent call last):
2025-06-20T12:51:02.3997880Z     File "D:\a\_work\1\s\src\mono\browser\emsdk\emscripten\em++.py", line 15, in <module>
2025-06-20T12:51:02.6225743Z       sys.exit(emcc.main(sys.argv))
2025-06-20T12:51:02.7001855Z                ~~~~~~~~~^^^^^^^^^^
2025-06-20T12:51:02.7365944Z     File "C:\python3\Lib\contextlib.py", line 85, in inner
2025-06-20T12:51:02.7870513Z       return func(*args, **kwds)
2025-06-20T12:51:02.8800056Z     File "D:\a\_work\1\s\src\mono\browser\emsdk\emscripten\emcc.py", line 1575, in main
2025-06-20T12:51:02.9159111Z       ret = run(args)
2025-06-20T12:51:02.9207856Z     File "D:\a\_work\1\s\src\mono\browser\emsdk\emscripten\emcc.py", line 632, in run
2025-06-20T12:51:02.9249801Z       linker_inputs = phase_compile_inputs(options, state, newargs, input_files)
2025-06-20T12:51:02.9259913Z     File "C:\python3\Lib\contextlib.py", line 85, in inner
2025-06-20T12:51:02.9267189Z       return func(*args, **kwds)
2025-06-20T12:51:02.9301165Z     File "D:\a\_work\1\s\src\mono\browser\emsdk\emscripten\emcc.py", line 990, in phase_compile_inputs
2025-06-20T12:51:02.9320691Z       shared.exec_process(cmd)
2025-06-20T12:51:02.9336893Z       ~~~~~~~~~~~~~~~~~~~^^^^^
2025-06-20T12:51:02.9362795Z     File "D:\a\_work\1\s\src\mono\browser\emsdk\emscripten\tools\shared.py", line 247, in exec_process
2025-06-20T12:51:02.9370634Z       rtn = run_process(cmd, stdin=sys.stdin, check=False).returncode
2025-06-20T12:51:02.9398532Z             ~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2025-06-20T12:51:02.9408055Z     File "D:\a\_work\1\s\src\mono\browser\emsdk\emscripten\tools\shared.py", line 130, in run_process
2025-06-20T12:51:02.9424373Z       ret = subprocess.run(cmd, check=check, input=input, *args, **kw)
2025-06-20T12:51:02.9444275Z     File "C:\python3\Lib\subprocess.py", line 556, in run
2025-06-20T12:51:02.9452406Z       with Popen(*popenargs, **kwargs) as process:
2025-06-20T12:51:02.9460843Z            ~~~~~^^^^^^^^^^^^^^^^^^^^^^
2025-06-20T12:51:02.9469300Z     File "C:\python3\Lib\subprocess.py", line 1004, in __init__
2025-06-20T12:51:02.9517008Z       errread, errwrite) = self._get_handles(stdin, stdout, stderr)
2025-06-20T12:51:02.9521127Z                            ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^
2025-06-20T12:51:02.9523617Z     File "C:\python3\Lib\subprocess.py", line 1377, in _get_handles
2025-06-20T12:51:02.9525965Z       p2cread = self._make_inheritable(p2cread)
2025-06-20T12:51:02.9528385Z   
2025-06-20T12:51:02.9530935Z     File "C:\python3\Lib\subprocess.py", line 1428, in _make_inheritable
2025-06-20T12:51:02.9533432Z   
2025-06-20T12:51:02.9535764Z       h = _winapi.DuplicateHandle(
2025-06-20T12:51:02.9538153Z   
2025-06-20T12:51:02.9540469Z           _winapi.GetCurrentProcess(), handle,
2025-06-20T12:51:02.9542730Z   
2025-06-20T12:51:02.9545026Z           _winapi.GetCurrentProcess(), 0, 1,
2025-06-20T12:51:02.9547284Z   
2025-06-20T12:51:02.9549505Z           _winapi.DUPLICATE_SAME_ACCESS)
2025-06-20T12:51:02.9551832Z   
2025-06-20T12:51:02.9554249Z   OSError: [WinError 6] The handle is invalid

[akoeplinger]

This was https://github.com/dotnet/runtime/issues/116746