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[ci-scan] Test failure: System.Numerics.Tensors.Tests.TensorTests.TensorValueReductionsPreserveScalarOrder #136367
Description
Build Information
Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1646082
Build error leg or test failing: System.Numerics.Tensors.Tests.TensorTests.TensorValueReductionsPreserveScalarOrder
Pull request: #136182
KBE authoring guidance (ci-failure-scan)
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Error Details
System.Numerics.Tensors.Tests.TensorTests.TensorValueReductionsPreserveScalarOrder(layout: 0) [FAIL]
Assert.Equal() Failure: Values differ
Expected: -2251799813685248
Actual: 9221120237041090560
Stack Trace:
/_/src/libraries/System.Numerics.Tensors/tests/TensorTests.cs(1243,0): at System.Numerics.Tensors.Tests.TensorTests.<TensorValueReductionsPreserveScalarOrder>g__Verify|32_0(Double[] values, <>c__DisplayClass32_0&)
/_/src/libraries/System.Numerics.Tensors/tests/TensorTests.cs(1162,0): at System.Numerics.Tensors.Tests.TensorTests.TensorValueReductionsPreserveScalarOrder(Int32 layout)
at InvokeStub_TensorTests.TensorValueReductionsPreserveScalarOrder(Object, Object, IntPtr*)
/_/src/libraries/System.Private.CoreLib/src/System/Reflection/MethodBaseInvoker.cs(104,0): at System.Reflection.MethodBaseInvoker.InvokeWithOneArg(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
Error Message
{
"ErrorMessage": [
"Assert.Equal() Failure: Values differ",
"Expected: -2251799813685248",
"Actual: 9221120237041090560",
"TensorTests.TensorValueReductionsPreserveScalarOrder"
],
"ErrorPattern": "",
"BuildRetry": false,
"ExcludeConsoleLog": false
}Agentic workflow metadata (ci-failure-scan)
Workflow artifact: ci-failure-scan
Artifact kind: kbe-verification
Verified match count: 5 hits in failure.log
Note
This issue was created with GitHub Copilot.
Known issue validation
Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1646082
Error message validated: [Assert.Equal() Failure: Values differ Expected: -2251799813685248 Actual: 9221120237041090560 TensorTests.TensorValueReductionsPreserveScalarOrder]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 10/23/2026 3:33:16 PM UTC
Report
Summary
| 24-Hour Hit Count | 7-Day Hit Count | 1-Month Count |
|---|---|---|
| 42 | 119 | 119 |
Activity
dotnet-policy-service commentedon Oct 23, 2026
Tagging subscribers to this area: @dotnet/area-system-numerics-tensors
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davidwrighton commentedon Oct 23, 2026
TensorValueReductionsPreserveScalarOrderis a new test introduced in #135122 (50c0edb53fed2f4bba4111d7a0ab50ef7ae98805, "Optimize System.Numerics.Tensors dense and strided operations"), merged on 2026-10-22 at 20:41:20 UTC, and started failing immediately on ARM/ARM64 configurations:1645954(20261022.83) (for Fix managed ilasm compatibility with runtime IL test builds #136244, queued at2026-10-22 20:47:04 UTC—6 minutes after Optimize System.Numerics.Tensors dense and strided operations #135122 merged), failed at 2026-10-22 21:38:14 UTC onAlpine.324.Arm32.Open(test run45756468).mainrolling build failure: Build1646363(20261022.4), failed at 2026-10-23 03:39:33 UTC onDebian.13.Arm32.Open(45769926),Android-armel(45770358), andiossimulator-arm64(45771010).refs/pull/*and 17 failed test runs out of 70 onrefs/heads/main.Failure details
In
TensorTests.TensorValueReductionsPreserveScalarOrder(src/libraries/System.Numerics.Tensors/tests/TensorTests.cs:1245),AssertBitscomparesBitConverter.DoubleToInt64Bits(expected)againstBitConverter.DoubleToInt64Bits(actual)for input[double.NegativeInfinity, double.PositiveInfinity, -0.0, 0.0, double.NaN, -3]:Expected: -2251799813685248(0xFFF8000000000000,-NaN)Actual: 9221120237041090560(0x7FF8000000000000,+NaN)Note
This comment was generated with the assistance of GitHub Copilot.
Fix NaN comparison in tensor scalar-order reduction test (#136438)