os/user: TestImpersonatedSelf/2 failures

[gopherbot]

#!watchflakes
default <- pkg == "os/user" && test == "TestImpersonatedSelf/2"

Issue created automatically to collect these failures.

Example (log):

=== RUN   TestImpersonatedSelf/2

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "os/user" && test == "TestImpersonatedSelf/2"

2025-05-02 11:24 gotip-windows-386 go@1cc624fd os/user.TestImpersonatedSelf/2 [ABORT] (log)

=== RUN   TestImpersonatedSelf/2

— watchflakes