flaky test in filewatching stdlib?

[nsajko]

A test failed in a CI run on #55521 on the "test x86_64-linux-gnuassertrr" job:

FileWatching                                     (12) |         failed at 2024-09-02T08:35:51.858
Test Failed at /cache/build/tester-amdci4-9/julialang/julia-master/julia-a0fe172fb8/share/julia/stdlib/v1.12/FileWatching/test/pidfile.jl:239
  Expression: 8 < t < 20
   Evaluated: 8 < 47.819079585 < 20

Context within test suite:

julia/stdlib/FileWatching/test/pidfile.jl

Lines 204 to 241 in 39f2ad1

	@assert !ispath("pidfile")
	@testset "open_exclusive: break lock" begin
	@testset "using stale_age without lock refreshing" begin
	t = @elapsed f = open_exclusive("pidfile", poll_interval=3, stale_age=10, refresh=0)::File
	try
	write_pidfile(f, getpid())
	finally
	close(f)
	end
	@test t < 2
	t = @elapsed f = open_exclusive("pidfile", poll_interval=3, stale_age=1, refresh=0)::File
	close(f)
	@test 20 < t < 50
	rm("pidfile")
	end
	@testset "using stale_age with lock refreshing on (default)" begin
	t = @elapsed f = open_exclusive("pidfile", poll_interval=3, stale_age=10)::File
	try
	write_pidfile(f, getpid())
	finally
	close(f)
	end
	@test t < 2
	t = @elapsed f = open_exclusive("pidfile", poll_interval=3, stale_age=5)::File
	close(f)
	@test 20 < t < 50
	rm("pidfile")
	end
	t = @elapsed f = open_exclusive("pidfile", poll_interval=3, stale_age=10)::File
	close(f)
	@test t < 2
	t = @elapsed f = open_exclusive("pidfile", poll_interval=3, stale_age=10)::File
	close(f)
	@test 8 < t < 20
	rm("pidfile")
	end

[giordano]

Duplicate of #55240