ExplicitConversion_FromSingle failing due to NaN != NaN

[stephentoub]

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=768837&view=results
Build error leg or test failing: System.Tests.HalfTests.ExplicitConversion_FromSingle
Pull request:

Error Message

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

{
  "ErrorMessage": "",
  "ErrorPattern": "FAIL.*System.Tests.HalfTests.ExplicitConversion_FromSingle",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=768837
Error message validated: [FAIL.*System.Tests.HalfTests.ExplicitConversion_FromSingle]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 8/8/2024 7:39:18 PM UTC

[14:40:21] info: [FAIL] System.Tests.HalfTests.ExplicitConversion_FromSingle(f: NaN, expected: NaN)
[14:40:21] info: Assert.Equal() Failure: Values differ
[14:40:21] info: Expected:   NaN
[14:40:21] info: Actual:     NaN
[14:40:21] info:    at System.AssertExtensions.Equal(Half expected, Half actual)
[14:40:21] info:    at System.Tests.HalfTests.ExplicitConversion_FromSingle(Single f, Half expected)
[14:40:21] info:    at System.Object.InvokeStub_HalfTests.ExplicitConversion_FromSingle(Object , Span`1 )
[14:40:21] info:    at System.Reflection.MethodBaseInvoker.InvokeWithFewArgs(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
[14:40:21] info: [FAIL] System.Tests.HalfTests.ExplicitConversion_FromSingle(f: NaN, expected: NaN)
[14:40:21] info: Assert.Equal() Failure: Values differ
[14:40:21] info: Expected:   NaN
[14:40:21] info: Actual:     NaN
[14:40:21] info:    at System.AssertExtensions.Equal(Half expected, Half actual)
[14:40:21] info:    at System.Tests.HalfTests.ExplicitConversion_FromSingle(Single f, Half expected)
[14:40:21] info:    at System.Object.InvokeStub_HalfTests.ExplicitConversion_FromSingle(Object , Span`1 )
[14:40:21] info:    at System.Reflection.MethodBaseInvoker.InvokeWithFewArgs(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)

Report

Build	Definition	Test	Pull Request
1069544	dotnet/runtime	WasmTestOnChrome-ST-System.Runtime.Tests.WorkItemExecution	#116720
1067706	dotnet/runtime	WasmTestOnChrome-ST-System.Runtime.Tests.WorkItemExecution	#116072
1067643	dotnet/runtime	WasmTestOnChrome-ST-System.Runtime.Tests.WorkItemExecution	#116645
1066666	dotnet/runtime	WasmTestOnChrome-ST-System.Runtime.Tests.WorkItemExecution	#116601
1064882	dotnet/runtime	WasmTestOnChrome-ST-System.Runtime.Tests.WorkItemExecution	#116529
1064117	dotnet/runtime	WasmTestOnChrome-ST-System.Runtime.Tests.WorkItemExecution	#115800
1062021	dotnet/runtime	WasmTestOnChrome-ST-System.Runtime.Tests.WorkItemExecution
1060119	dotnet/runtime	WasmTestOnChrome-ST-System.Runtime.Tests.WorkItemExecution	#116319
1059372	dotnet/runtime	WasmTestOnChrome-ST-System.Runtime.Tests.WorkItemExecution	#116281
1059105	dotnet/runtime	WasmTestOnChrome-ST-System.Runtime.Tests.WorkItemExecution	#116222
1059081	dotnet/runtime	WasmTestOnChrome-ST-System.Runtime.Tests.WorkItemExecution	#116315
1059120	dotnet/runtime	WasmTestOnChrome-ST-System.Runtime.Tests.WorkItemExecution
1058936	dotnet/runtime	WasmTestOnChrome-ST-System.Runtime.Tests.WorkItemExecution	#116309
1057321	dotnet/runtime	WasmTestOnChrome-ST-System.Runtime.Tests.WorkItemExecution	#116072
1057062	dotnet/runtime	WasmTestOnChrome-ST-System.Runtime.Tests.WorkItemExecution	#115351
1056649	dotnet/runtime	WasmTestOnChrome-ST-System.Runtime.Tests.WorkItemExecution	#111229
1055962	dotnet/runtime	WasmTestOnChrome-ST-System.Runtime.Tests.WorkItemExecution	#115453
1055470	dotnet/runtime	WasmTestOnChrome-ST-System.Runtime.Tests.WorkItemExecution	#116165
1053082	dotnet/runtime	WasmTestOnChrome-ST-System.Runtime.Tests.WorkItemExecution	#116069
1052039	dotnet/runtime	WasmTestOnChrome-ST-System.Runtime.Tests.WorkItemExecution	#115335
1051710	dotnet/runtime	WasmTestOnChrome-ST-System.Runtime.Tests.WorkItemExecution	#115766
1050430	dotnet/runtime	WasmTestOnChrome-ST-System.Runtime.Tests.WorkItemExecution
1046982	dotnet/runtime	WasmTestOnChrome-ST-System.Runtime.Tests.WorkItemExecution	#115583

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
1	6	23

[dotnet-policy-service]

Tagging subscribers to this area: @dotnet/area-infrastructure-libraries
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Tagging subscribers to this area: @dotnet/area-system-numerics
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[ericstj]

This issue is matching to tests jobs which log test names. Need to further constrain the match.

[mdh1418]

Just hit this in #106040 for WasmTestOnChrome-ST-System.Runtime.Tests
config: net9.0-browser-Release-wasm-Mono_Release-WasmTestOnChrome

[18:27:21] info: [STRT] System.Tests.HalfTests.ExplicitConversion_FromSingle(f: NaN, expected: NaN)
[18:27:21] info: [FAIL] System.Tests.HalfTests.ExplicitConversion_FromSingle(f: NaN, expected: NaN)
[18:27:21] info: Assert.Equal() Failure: Values differ
[18:27:21] info: Expected:   NaN
[18:27:21] info: Actual:     NaN
[18:27:21] info:    at System.AssertExtensions.Equal(Half expected, Half actual)
[18:27:21] info:    at System.Tests.HalfTests.ExplicitConversion_FromSingle(Single f, Half expected)
[18:27:21] info:    at System.Object.InvokeStub_HalfTests.ExplicitConversion_FromSingle(Object , Span`1 )
[18:27:21] info:    at System.Reflection.MethodBaseInvoker.InvokeWithFewArgs(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
[18:27:21] info: [STRT] System.Tests.HalfTests.ExplicitConversion_FromSingle(f: NaN, expected: NaN)
[18:27:21] info: [FAIL] System.Tests.HalfTests.ExplicitConversion_FromSingle(f: NaN, expected: NaN)
[18:27:21] info: Assert.Equal() Failure: Values differ
[18:27:21] info: Expected:   NaN
[18:27:21] info: Actual:     NaN
[18:27:21] info:    at System.AssertExtensions.Equal(Half expected, Half actual)
[18:27:21] info:    at System.Tests.HalfTests.ExplicitConversion_FromSingle(Single f, Half expected)
[18:27:21] info:    at System.Object.InvokeStub_HalfTests.ExplicitConversion_FromSingle(Object , Span`1 )
[18:27:21] info:    at System.Reflection.MethodBaseInvoker.InvokeWithFewArgs(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)

Not sure why it didn't match in build analysis