[ci-scan] Test failure: System.Security.Cryptography.EcDiffieHellman.Tests.ECDiffieHellmanTests_OpenSsl.TestExplicitCurveImportO #137121

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1665174
Build error leg or test failing: linux-x64 Release Libraries_Release_CoreCLR - azurelinux.4.amd64.open-System.Security.Cryptography.Tests / ECDiffieHellmanTests_OpenSsl.TestExplicitCurveImportOnUnsupportedPlatform

Pipeline: runtime-extra-platforms, definition 154, main.
Affected platform: Linux x64, Azure Linux 4, CoreCLR Release. Both the Default and OpenSsl test variants fail.
First build it occurred (earliest verified observation, not an established introducing build): 1653767, finished 2026-10-29T09:48:20.7818427Z.
Follow-up build: 1667020, finished 2026-11-06T09:02:57.4679438Z; both variants reproduce the same ordered diagnostic.

Eleven source-and-prior builds were inspected. The failure was verified in eight distinct builds: 1653767, 1655451, 1657310, 1658360, 1659071, 1661087, 1663137, and 1665174. It also reproduces in follow-up 1667020. The three older sampled builds did not expose a failed crypto console for this leg; that does not establish a passing affected test. The true origin may predate the earliest verified observation.

Error Details

The unsupported-platform test expects importing an explicit EC curve to throw PlatformNotSupportedException, but no exception is thrown. This scan does not establish whether the defect is in capability detection, the test expectation, or the implementation.

Source console: https://helixr1107v0xdeko0k025g8.blob.core.windows.net/dotnet-runtime-refs-heads-main-ef23feeef2f14d4f8e/System.Security.Cryptography.Tests/1/console.99f215d0.log?helixlogtype=result

Representative complete failure block:

System.Security.Cryptography.EcDiffieHellman.Tests.ECDiffieHellmanTests_OpenSsl.TestExplicitCurveImportOnUnsupportedPlatform [FAIL]
  Assert.Throws() Failure: No exception was thrown
  Expected: typeof(System.PlatformNotSupportedException)
  Stack Trace:
    /_/src/libraries/Common/tests/System/Security/Cryptography/AlgorithmImplementations/ECDiffieHellman/ECDiffieHellmanTests.ImportExport.cs(339,0): at System.Security.Cryptography.EcDiffieHellman.Tests.ECDiffieHellmanTests.TestExplicitCurveImportOnUnsupportedPlatform()
    /_/src/coreclr/System.Private.CoreLib/src/System/Reflection/IntrinsicInvokeHelper.cs(837,0): at System.Reflection.IntrinsicInvokeHelper.Instance_Void_0(IntPtr fn, Object obj, IntPtr* _, RuntimeType __)
    /_/src/coreclr/System.Private.CoreLib/src/System/Reflection/MethodBaseInvoker.CoreCLR.cs(33,0): at System.Reflection.MethodBaseInvoker.InvokeWithSharedThunk(Object obj, IntPtr* args)
    /_/src/libraries/System.Private.CoreLib/src/System/Reflection/RuntimeMethodInfo.cs(134,0): at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)

The Default variant has the same assertion, expected exception, and stack frames. The matcher covers both variants without matching passing or skipped output.

Error Message

{
  "ErrorMessage": [
    "TestExplicitCurveImportOnUnsupportedPlatform [FAIL]",
    "Assert.Throws() Failure: No exception was thrown",
    "Expected: typeof(System.PlatformNotSupportedException)"
  ],
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Filed by ci-failure-scan (detection only). ci-failure-fix walks open [ci-scan] KBEs and either opens a small fix PR or comments here to loop in owners — it never disables the test.

Generated by CI Outer-Loop Failure Scanner · copilot · gpt61 · ~313 AIC · ⌖ ~14 AIC · ⊞ 33.3K · ◷

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Summary