Test failure: System.IO.Tests.File_Changed_Tests.FileSystemWatcher_File_Changed_LastWrite

[JulieLeeMSFT]

Failed in:

• runtime-coreclr libraries-pgo 20260301.1

Failed tests:

- net11.0-linux-Release-x64-jitosr_stress_random-AzureLinux.3.Amd64.Open
  - System.IO.Tests.File_Changed_Tests.FileSystemWatcher_File_Changed_LastWrite

Error Message:

Changed event did not occur as expected

Stack Trace:

        /_/src/libraries/System.IO.FileSystem.Watcher/tests/Utility/FileSystemWatcherTest.cs(198,0): at System.IO.Tests.FileSystemWatcherTest.ExpectEvent(FileSystemWatcher watcher, WatcherChangeTypes expectedEvents, Action action, Action cleanup, String[] expectedPaths, Int32 attempts, Int32 timeout)
        /_/src/libraries/System.IO.FileSystem.Watcher/tests/Utility/FileSystemWatcherTest.cs(168,0): at System.IO.Tests.FileSystemWatcherTest.ExpectEvent(FileSystemWatcher watcher, WatcherChangeTypes expectedEvents, Action action, Action cleanup, String expectedPath, Int32 attempts, Int32 timeout)
        /_/src/libraries/System.IO.FileSystem.Watcher/tests/FileSystemWatcher.File.Changed.cs(21,0): at System.IO.Tests.File_Changed_Tests.FileSystemWatcher_File_Changed_LastWrite()
           at System.RuntimeMethodHandle.InvokeMethod(ObjectHandleOnStack target, Void** arguments, ObjectHandleOnStack sig, BOOL isConstructor, ObjectHandleOnStack result)
        /_/src/libraries/System.Private.CoreLib/src/System/Reflection/MethodBaseInvoker.cs(57,0): at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)

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[adamsitnik]

cc @tmds

[tmds]

As this hasn't failed afaik, it may be that the event missed the timeout we have for this test.