os: TestFileAssociatedWithExternalIOCP failures

[gopherbot]

#!watchflakes
default <- pkg == "os" && test == "TestFileAssociatedWithExternalIOCP"

Issue created automatically to collect these failures.

Example (log):

=== RUN   TestFileAssociatedWithExternalIOCP
=== PAUSE TestFileAssociatedWithExternalIOCP
=== CONT  TestFileAssociatedWithExternalIOCP
    os_windows_test.go:2062: The handle is invalid.
--- FAIL: TestFileAssociatedWithExternalIOCP (0.45s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "os" && test == "TestFileAssociatedWithExternalIOCP"

2025-05-15 01:11 gotip-windows-amd64-longtest go@b30fa1bc os.TestFileAssociatedWithExternalIOCP (log)

=== RUN   TestFileAssociatedWithExternalIOCP
=== PAUSE TestFileAssociatedWithExternalIOCP
=== CONT  TestFileAssociatedWithExternalIOCP
    os_windows_test.go:2062: The handle is invalid.
--- FAIL: TestFileAssociatedWithExternalIOCP (0.45s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "os" && test == "TestFileAssociatedWithExternalIOCP"

2025-09-10 10:17 gotip-windows-amd64 go@f1c4b860 os.TestFileAssociatedWithExternalIOCP (log)

=== RUN   TestFileAssociatedWithExternalIOCP
=== PAUSE TestFileAssociatedWithExternalIOCP
=== CONT  TestFileAssociatedWithExternalIOCP
    os_windows_test.go:2104: The handle is invalid.
--- FAIL: TestFileAssociatedWithExternalIOCP (0.73s)

— watchflakes