if !strings.HasPrefix(output, want) {
		t.Fatalf("output does not start with %q:\n%s", want, output)
	}
}

func TestNetpollDeadlock(t *testing.T) {
	t.Parallel()
	output := runTestProg(t, "testprognet", "NetpollDeadlock")
	want := "done\n"
	if !strings.HasSuffix(output, want) {
		t.Fatalf("output does not start with %q:\n%s", want, output)
	}
}

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