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TensorExtensionsSpanInSpanOut<Single> test failure #135718
Description
System.Numerics.Tensors.Tests.TensorTests.TensorExtensionsSpanInSpanOut<Single>(tensorPrimitivesOperation: PerformCalculationSpanInSpanOut`1 { HasSingleTarget = True, Method = Single Exp10(Single), Target = null }, tensorOperation: PerformSpanInSpanOut`1 { HasSingleTarget = True, Method = System.Numerics.Tensors.Tensor`1[System.Single] Exp10[Single](System.Numerics.Tensors.ReadOnlyTensorSpan`1[System.Single] ByRef), Target = null }, tolerance: 9.99999975E-06) [FAIL]
Assert.All() Failure: 1 out of 12 items in the collection did not pass.
[11]: Item: [1, 2, 3, 4, 5, ···]
Error: Assert.Equal() Failure: Values differ
Expected: 3.40280805E+38
Actual: +∞
Stack Trace:
/_/src/libraries/System.Numerics.Tensors/tests/TensorTests.cs(102,0): at System.Numerics.Tensors.Tests.TensorTests.TensorExtensionsSpanInSpanOut[T](PerformCalculationSpanInSpanOut`1 tensorPrimitivesOperation, PerformSpanInSpanOut`1 tensorOperation, Nullable`1 tolerance)
Build Information
Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1633801
Build error leg or test failing: System.Numerics.Tensors.Tests.TensorTests.TensorExtensionsSpanInSpanOut
Pull request: #131826
Error Message
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Fill the error message using step by step known issues guidance.
{
"ErrorMessage": ["Values differ","Tests.TensorExtensionsSpanInSpanOut"],
"ErrorPattern": "",
"BuildRetry": false,
"ExcludeConsoleLog": false
}Note
ErrorMessage widened from TensorTests.TensorExtensionsSpanInSpanOut to Tests.TensorExtensionsSpanInSpanOut so it also matches the same overflow in TensorSpanTests (e.g. #135713, closed as a duplicate of this issue). This edit was drafted with GitHub Copilot.
Known issue validation
Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1633801
Error message validated: [Values differ Tests.TensorExtensionsSpanInSpanOut]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 10/17/2026 7:31:46 PM UTC
Report
Summary
| 24-Hour Hit Count | 7-Day Hit Count | 1-Month Count |
|---|---|---|
| 2 | 21 | 53 |
Activity
dotnet-policy-service commentedon Oct 13, 2026
Tagging subscribers to this area: @dotnet/area-system-numerics-tensors
See info in area-owners.md if you want to be subscribed.
MihuBot commentedon Oct 13, 2026
I'm a bot. Here is a possible related and/or duplicate issue (I may be wrong):
JulieLeeMSFT commentedon Oct 14, 2026
@tannergooding PTAL.
Use the float Exp polynomial for Exp10 and Exp2