// 	_testmain.go:71 +0x170
	data, err := os.ReadFile(crashOutput)
	if err != nil {
		t.Fatalf("child process failed to write crash report: %v", err)
	}
	crash := string(data)
	t.Logf("crash = <<%s>>", crash)
	t.Logf("stderr = <<%s>>", stderr)

	// Check that the crash file and the stderr both contain the panic and stack trace.
	for _, want := range []string{
		"panic: oops",
		"goroutine 1",

func (c *kubeComponent) InvokeOrFail(t test.Failer, args []string) (string, string) {
	output, stderr, err := c.Invoke(args)
	if err != nil {
		t.Logf("Unwanted exception for 'istioctl %s': %v", strings.Join(args, " "), err)
		t.Logf("Output:\n%v", output)
		t.Logf("Error:\n%v", stderr)
		t.FailNow()
	}
	return output, stderr

}

func (d TestFrontend) Logf(msg string, args ...interface{}) { d.t.Logf(msg, args...) }
func (d TestFrontend) Log() bool                            { return true }

func (d TestFrontend) Fatalf(_ src.XPos, msg string, args ...interface{}) { d.t.Fatalf(msg, args...) }
func (d TestFrontend) Warnl(_ src.XPos, msg string, args ...interface{})  { d.t.Logf(msg, args...) }

		t.Logf("got span %+v, want span %+v", got, want)
		return false
	}
	if len(got.ChildSpans) < len(want.ChildSpans) {
		t.Logf("got %d child spans from, want %d child spans, maybe trace has not be fully reported",
			len(got.ChildSpans), len(want.ChildSpans))
		return false
	} else if len(got.ChildSpans) > len(want.ChildSpans) {

// therefore foo can early exit.
func TestRaceRangeFuncIterator(t *testing.T) {
	x := foo(4)
	t.Logf("foo(4)=%d", x)
}

// TestNoRaceRangeFuncIterator does not race because x%5 is never 5,
// therefore foo's loop will not exit early, and this it will not race.
func TestNoRaceRangeFuncIterator(t *testing.T) {
	x := foo(5)
	t.Logf("foo(5)=%d", x)

	cmd.Env = append(cmd.Env, "GOCOMPILEDEBUG=fmahash=1/0", "GOOS=linux", "GOARCH=arm64", "HOME="+tmpdir)
	t.Logf("%v", cmd)
	t.Logf("%v", cmd.Env)
	b, e := cmd.CombinedOutput()
	if e != nil {
		t.Errorf("build failed: %v\n%s", e, b)
	}
	s := string(b) // Looking for "GOFMAHASH triggered main.main:24"

		}
	}
}

func TestErrorUsefulMessage(t *testing.T) {
	{
		s := Invalid(nil, nil, "").Error()
		t.Logf("message: %v", s)
		if !strings.Contains(s, "null") {
			t.Errorf("error message did not contain 'null': %s", s)
		}
	}

	s := Invalid(NewPath("foo"), "bar", "deet").Error()
	t.Logf("message: %v", s)
	for _, part := range []string{"foo", "bar", "deet", ErrorTypeInvalid.String()} {
		if !strings.Contains(s, part) {

	args = append(args, flags...)
	args = append(args, srcfname)
	cmd := testenv.Command(t, testenv.GoToolPath(t), args...)
	// "Bad line" bug #36683 is sensitive to being run in the source directory.
	cmd.Dir = "testdata"
	t.Logf("Running %v", cmd.Args)
	out, err := cmd.CombinedOutput()
	if err != nil {
		t.Fatalf("go build %s: %v\n%s", srcfname, err, out)
	}
	need := []string{
		"TEXT main.main(SB)",
	}

	if printCode {

			defaulted := original.DeepCopyObject().(*flowcontrol.FlowSchema)
			scheme.Default(defaulted)
			if apiequality.Semantic.DeepEqual(original, defaulted) {
				t.Logf("Defaulting makes no change to FlowSchema: %q", original.Name)
				return
			}
			t.Errorf("Expected defaulting to not change FlowSchema: %q, diff: %s", original.Name, cmp.Diff(original, defaulted))
		})
	}

	for _, re := range errors {
		found := false
		for _, line := range lines {
			if re.Match(line) {
				t.Logf("found match for %#q: %q", re, line)
				found = true
				break
			}
		}
		if !found {
			t.Errorf("expected error output to contain %#q", re)
		}
	}

	if t.Failed() {
		t.Logf("actual output:\n%s", out)
	}
}

func sizeofLongDouble(t *testing.T) int {
	testenv.MustHaveGoRun(t)