System.Globalization.Tests.NumberFormatInfoNumberGroupSizes.NumberGroupSizes_Get_ReturnsExpected fails on osx-arm64

[kotlarmilos]

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1167858&view=logs&j=88ca5a82-aab9-5975-0034-f4bb53389110&t=1c1d8f93-f06c-530f-c1b3-3c5f79c29ff3
Build error leg or test failing: NumberFormatInfoNumberGroupSizes

Error Message

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

{
  "ErrorMessage": "{ CurrencyDecimalDigits = 2, CurrencyDecimalSeparator = \".\", CurrencyGroupSeparator = \",\", CurrencyGroupSizes = [3, 2], CurrencyNegativePattern = 1, ··· }, expected: [3]) [FAIL]",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

System.Globalization.Tests.NumberFormatInfoNumberGroupSizes.NumberGroupSizes_Get_ReturnsExpected(format: NumberFormatInfo { CurrencyDecimalDigits = 2, CurrencyDecimalSeparator = ".", CurrencyGroupSeparator = ",", CurrencyGroupSizes = [3, 2], CurrencyNegativePattern = 1, ··· }, expected: [3]) [FAIL]
Assert.Equal() Failure: Collections differ
Expected: [3]
Actual:   [3, 2]
            ↑ (pos 1)
Stack Trace:
/_/src/libraries/System.Runtime/tests/System.Globalization.Tests/NumberFormatInfo/NumberFormatInfoNumberGroupSizes.cs(27,0): at System.Globalization.Tests.NumberFormatInfoNumberGroupSizes.NumberGroupSizes_Get_ReturnsExpected(NumberFormatInfo format, Int32[] expected)
   at InvokeStub_NumberFormatInfoNumberGroupSizes.NumberGroupSizes_Get_ReturnsExpected(Object, Span`1)
/_/src/libraries/System.Private.CoreLib/src/System/Reflection/MethodBaseInvoker.cs(136,0): at System.Reflection.MethodBaseInvoker.InvokeWithFewArgs(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
System.Globalization.Tests.CultureInfoConstructor.TestCreationWithTemporaryLCID [SKIP]
Condition(s) not met: "IsWindows10Version1903OrGreater"
Finished:    System.Globalization.Tests

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1167858
Error message validated: [{ CurrencyDecimalDigits = 2, CurrencyDecimalSeparator = ".", CurrencyGroupSeparator = ",", CurrencyGroupSizes = [3, 2], CurrencyNegativePattern = 1, ··· }, expected: [3]) [FAIL]]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 10/8/2025 8:23:10 AM UTC

Report

Build	Definition	Test	Pull Request
1168232	dotnet/runtime	System.Globalization.Tests.NumberFormatInfoNumberGroupSizes.NumberGroupSizes_Get_ReturnsExpected
1167858	dotnet/runtime	System.Globalization.Tests.NumberFormatInfoNumberGroupSizes.NumberGroupSizes_Get_ReturnsExpected

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
1	2	2

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[MihuBot]

I'm a bot. Here are possible related and/or duplicate issues (I may be wrong):

• [maccatalyst][mono] System.Globalization.Tests.NumberFormatInfoNumberGroupSizes.NumberGroupSizes_Get_ReturnsExpected fails #118850
• NumberGroupSizes_Get_ReturnsExpected fails on macOS 26 Preview 3 #117421

[tarekgh]

This is a duplicate of #118850 but it is happening on another Apple OS. We'll keep this open to not fail the CI.