tb := t.current.Load()
	var logf func(format string, args ...any)
	if tb != nil {
		tbb := *tb
		tbb.Helper()
		switch t.action.Load() {
		case errorMessage:
			logf = tbb.Errorf
		case fatalMessage:
			logf = tbb.Fatalf
		default:
			logf = tbb.Logf
		}
	} else {
		switch t.action.Load() {
		case errorMessage:
			logf = func(format string, args ...any) {

		buf := new(bytes.Buffer)

		t.Logf("input = %q", in)
		for _, tt := range []Reader{
			{Comma: ','},
			{Comma: ';'},
			{Comma: '\t'},
			{Comma: ',', LazyQuotes: true},
			{Comma: ',', TrimLeadingSpace: true},
			{Comma: ',', Comment: '#'},
			{Comma: ',', Comment: ';'},
		} {
			t.Logf("With options:")
			t.Logf("  Comma            = %q", tt.Comma)
			t.Logf("  LazyQuotes       = %t", tt.LazyQuotes)

		}
		if len(allMismatches) == 0 {
			t.Logf("no diff found")
			return
		}
		sort.Slice(allMismatches, func(i, j int) bool {
			return len(allMismatches[i]) < len(allMismatches[j])
		})
		t.Logf("query %q returned %v series, but none matched our query exactly.", query.Metric, len(value))
		t.Logf("Original query: %v", query.String())
		for i, m := range allMismatches {

	defer remove()

	path := filepath.Join(dir, "lock")

	mu := lockedfile.MutexAt(path)
	t.Logf("mu := MutexAt(_)")

	unlock, err := mu.Lock()
	if err != nil {
		t.Fatalf("mu.Lock: %v", err)
	}
	t.Logf("unlock, _  := mu.Lock()")

	mu2 := lockedfile.MutexAt(mu.Path)
	t.Logf("mu2 := MutexAt(mu.Path)")

	wait := mustBlock(t, "mu2.Lock()", func() {
		unlock2, err := mu2.Lock()
		if err != nil {

				}
			}
		}

		t.Logf("%s -o %s %s", cc, cexe, cfn)
		cmd = testenv.Command(t, cc, "-o", cexe, cfn)
		cmd = testenv.CleanCmdEnv(cmd)
		out, err = cmd.CombinedOutput()
		if len(out) > 0 {
			t.Logf("%s", out)
		}
		if err != nil {
			t.Skipf("can't verify VDSO status, C compiled failed: %v", err)
		}

		t.Logf("%s -f -e clock_gettime %s", strace, cexe)

		}
		if x != Y {
			logf("Bswap64(0x%08x) expected 0x%08x but got 0x%08x\n", y, x, Y)
		}

		x32 := uint32(X)
		y32 := uint32(Y >> 32)

		X32 := T.Bswap32(x32) // ERROR "intrinsic substitution for Bswap32"
		Y32 := T.Bswap32(y32) // ERROR "intrinsic substitution for Bswap32"
		if y32 != X32 {
			logf("Bswap32(0x%08x) expected 0x%08x but got 0x%08x\n", x32, y32, X32)
		}
		if x32 != Y32 {

	if len(lines) != 3 {
		t.Logf("Expected 2 lines of output, got %q", output)
		return errors.New("unexpected output (incorrect number of lines)")
	}
	fields := strings.Fields(lines[1])
	if len(fields) != 6 {
		t.Logf("Expected 6 columns, got %#v", fields)
		return errors.New("unexpected output (incorrect number of columns)")
	}
	if fields[0] != workload {
		t.Logf("Expected column 1 to be %q, got %#v", workload, fields)

		if err != nil {
			t.Fatalf("unexpected error from Dial with %v connections: %v", len(dialed), err)
		}
		dialed = append(dialed, c)
		if testing.Verbose() && len(dialed)%(1<<12) == 0 {
			t.Logf("dialed %d connections", len(dialed))
		}
	}
	t.Logf("dialed %d connections", len(dialed))

	// Now that all of the ports are in use, dialing another should fail due
	// to port exhaustion, which (for POSIX-like socket APIs) should return

	b, err := httputil.DumpRequest(req, false)
	if err != nil {
		h.t.Logf("Failed to dump request, host=%s: %v", req.Host, err)
	} else {
		h.t.Logf("Proxy Request: %s", string(b))
	}

	if req.Method != http.MethodConnect {
		h.httpProxy.ServeHTTP(rw, req)
		return
	}

	// CONNECT proxy

	sconn, err := net.Dial("tcp", req.Host)
	if err != nil {
		h.t.Logf("Failed to dial proxy backend, host=%s: %v", req.Host, err)

	t.Helper()
	err := filelock.Lock(f)
	t.Logf("Lock(fd %d) = %v", f.Fd(), err)
	if err != nil {
		t.Fail()
	}
}

func rLock(t *testing.T, f *os.File) {
	t.Helper()
	err := filelock.RLock(f)
	t.Logf("RLock(fd %d) = %v", f.Fd(), err)
	if err != nil {
		t.Fail()
	}
}

func unlock(t *testing.T, f *os.File) {
	t.Helper()
	err := filelock.Unlock(f)
	t.Logf("Unlock(fd %d) = %v", f.Fd(), err)
	if err != nil {