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Test failure: _covariant_returns::AsyncMicro.Program.TestPrRepro() #126683

@VincentBu

Description

@VincentBu

Failed in: runtime-coreclr outerloop 20260408.2

Failed tests:

R2R-CG2 windows x86 Checked @ Windows.10.Amd64.Open
- _covariant_returns::AsyncMicro.Program.TestPrRepro()
R2R-CG2 windows x86 Checked no_tiered_compilation @ Windows.10.Amd64.Open
- _covariant_returns::AsyncMicro.Program.TestPrRepro()
R2R-CG2 windows x64 Checked @ Windows.10.Amd64.Open
- _covariant_returns::AsyncMicro.Program.TestPrRepro()
R2R-CG2 windows x64 Checked no_tiered_compilation @ Windows.10.Amd64.Open
- _covariant_returns::AsyncMicro.Program.TestPrRepro()
R2R-CG2 linux x64 Checked @ (Alpine.323.Amd64.Open)AzureLinux.3.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:alpine-3.23-helix-amd64
- _covariant_returns::AsyncMicro.Program.TestPrRepro()
R2R-CG2 linux x64 Checked no_tiered_compilation @ (Alpine.323.Amd64.Open)AzureLinux.3.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:alpine-3.23-helix-amd64
- _covariant_returns::AsyncMicro.Program.TestPrRepro()
R2R-CG2 linux x64 Checked @ AzureLinux.3.Amd64.Open
- _covariant_returns::AsyncMicro.Program.TestPrRepro()
R2R-CG2 linux x64 Checked no_tiered_compilation @ AzureLinux.3.Amd64.Open
- _covariant_returns::AsyncMicro.Program.TestPrRepro()
R2R-CG2 osx x64 Checked @ OSX.15.Amd64.Open
- _covariant_returns::AsyncMicro.Program.TestPrRepro()
R2R-CG2 osx x64 Checked no_tiered_compilation @ OSX.15.Amd64.Open
- _covariant_returns::AsyncMicro.Program.TestPrRepro()

Error message:

Assert.Equal() Failure: Strings differ
                            ↓ (pos 17)
Expected: "Task<int> Derived2.Foo;Task<int> Derived.Foo;"
Actual:   "Task<int> Derived.Foo;"
                            ↑ (pos 17)

Stack trace:

   at Xunit.Assert.Equal(ReadOnlySpan`1 expected, ReadOnlySpan`1 actual, Boolean ignoreCase, Boolean ignoreLineEndingDifferences, Boolean ignoreWhiteSpaceDifferences, Boolean ignoreAllWhiteSpace) in /_/src/arcade/src/Microsoft.DotNet.XUnitAssert/src/StringAsserts.cs:line 875
   at Xunit.Assert.Equal(String expected, String actual, Boolean ignoreCase, Boolean ignoreLineEndingDifferences, Boolean ignoreWhiteSpaceDifferences, Boolean ignoreAllWhiteSpace) in /_/src/arcade/src/Microsoft.DotNet.XUnitAssert/src/StringAsserts.cs:line 1354
   at Xunit.Assert.Equal(String expected, String actual) in /_/src/arcade/src/Microsoft.DotNet.XUnitAssert/src/StringAsserts.cs:line 825
   at AsyncMicro.Program.TestPrRepro()
   at Program.<<Main>$>g__TestExecutor14|0_15(StreamWriter tempLogSw, StreamWriter statsCsvSw, <>c__DisplayClass0_0&)

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