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) {

	t.Helper()

	if debugtrace {
		if indir != "" {
			t.Logf("in dir %s: ", indir)
		}
		t.Logf("cmd: %s %+v\n", testenv.GoToolPath(t), bargs)
	}
	cmd := testenv.Command(t, testenv.GoToolPath(t), bargs...)
	cmd.Dir = indir
	b, err := cmd.CombinedOutput()
	if len(b) != 0 {
		t.Logf("## build output:\n%s", b)
	}
	if err != nil {
		t.Fatalf("build error: %v", err)
	}
}

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...) }

// 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"

}

// RegisterSet is a bitmap of registers, indexed by Register.num.
type RegisterSet uint64

// logf prints debug-specific logging to stdout (always stdout) if the
// current function is tagged by GOSSAFUNC (for ssa output directed
// either to stdout or html).
func (s *debugState) logf(msg string, args ...interface{}) {
	if s.f.PrintOrHtmlSSA {
		fmt.Printf(msg, args...)
	}
}

		}
		for stack, pprofSamples := range pprofStacks {
			t.Logf("CPU profile included %d samples at stack %q not present in execution trace", pprofSamples, stack)
			if !overflowed {
				t.Fail()
			}
		}

		if t.Failed() {
			t.Logf("execution trace CPU samples:")
			for stack, samples := range traceStacks {
				t.Logf("%d: %q", samples, stack)
			}
			t.Logf("CPU profile:\n%s", stderr)
		}
	})
}

				// another error immediately.
				t.Logf("closing spurious connection from Dial")
				c.Close()

				if delta <= 1 && d.Timeout <= 1 {
					t.Fatalf("can't reduce Timeout or Deadline")
				}
				if delta > 1 {
					delta /= 2
					t.Logf("reducing Deadline delta to %v", delta)
				}
				if d.Timeout > 1 {
					d.Timeout /= 2
					t.Logf("reducing Timeout to %v", d.Timeout)
				}
			}

	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 {