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[x86] SequenceEqual returns false for equal spans #65292

Closed
@VincentBu

Description

@VincentBu

Run: runtime-libraries-coreclr outerloop 20220213.4

Failed test:

net7.0-windows-Release-x86-CoreCLR_release-Windows.Amd64.Server2022.Open

- System.IO.Tests.UnseekableDeviceFileStreamConnectedConformanceTests.ReadWrite_Success_Large(mode: AsyncMemory, writeSize: 10485760, startWithFlush: True)
- System.IO.Tests.AnonymousPipeFileStreamConnectedConformanceTests.ReadWrite_Success_Large(mode: SyncArray, writeSize: 10485760, startWithFlush: False)

Error message:

Showing first 10 differences
Total number of differences: 0 out of 10485760


Stack trace
   at System.AssertExtensions.SequenceEqual[T](ReadOnlySpan`1 expected, ReadOnlySpan`1 actual) in /_/src/libraries/Common/tests/TestUtilities/System/AssertExtensions.cs:line 473
   at System.IO.Tests.ConnectedStreamConformanceTests.ReadWrite_Success(ReadWriteMode mode, Int32 writeSize, Boolean startWithFlush) in /_/src/libraries/Common/tests/StreamConformanceTests/System/IO/StreamConformanceTests.cs:line 1765
   at System.IO.Tests.ConnectedStreamConformanceTests.ReadWrite_Success_Large(ReadWriteMode mode, Int32 writeSize, Boolean startWithFlush) in /_/src/libraries/Common/tests/StreamConformanceTests/System/IO/StreamConformanceTests.cs:line 1719
--- End of stack trace from previous location ---
Build Kind Start Time
1612202 Rolling 2022-14-02
1613425 Rolling 2022-15-02
1616198 Rolling 2022-16-02
1616876 Rolling 2022-16-02
1617545 Rolling 2022-17-02
1618267 Rolling 2022-17-02

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