t.Error(err)
		cmd.Process.Kill()
		cmd.Wait()
		t.FailNow()
	}
	if buf.Len() > 0 {
		t.Logf("stdout %v:\n%s", cmd.Args, buf)
	}

	return cmd
}

func TestWaitInterrupt(t *testing.T) {
	t.Parallel()

	// tooLong is an arbitrary duration that is expected to be much longer than
	// the test runs, but short enough that leaked processes will eventually exit
	// on their own.