}

  // Verify that stack traces of func is copied to graph function library.
  ASSERT_NE(func_stack_traces, nullptr);
  EXPECT_EQ(func_stack_traces->size(), 4);
  EXPECT_EQ(func_stack_traces->at("neg")->ToString({}), kNegStackToString);
  EXPECT_EQ(func_stack_traces->at("feed")->ToString({}), kFeedStackToString);

  // Verify that stack traces of grad_func is copied to graph function library.

	n := tracebackPCs(&u, 0, pcbuf)
	r.Stack = make([]uintptr, n)
	copy(r.Stack, pcbuf)
}

// Stack formats a stack trace of the calling goroutine into buf
// and returns the number of bytes written to buf.
// If all is true, Stack formats stack traces of all other goroutines
// into buf after the trace for the current goroutine.
func Stack(buf []byte, all bool) int {
	var stw worldStop
	if all {

const usesLR = sys.MinFrameSize > 0

const (
	// tracebackInnerFrames is the number of innermost frames to print in a
	// stack trace. The total maximum frames is tracebackInnerFrames +
	// tracebackOuterFrames.
	tracebackInnerFrames = 50

	// tracebackOuterFrames is the number of outermost frames to print in a
	// stack trace.
	tracebackOuterFrames = 50
)

// unwindFlags control the behavior of various unwinders.

  Resources resources = 24 [deprecated = true];

  // Specify which tracer to use. One of: zipkin, lightstep, datadog, stackdriver.
  // If using stackdriver tracer outside GCP, set env GOOGLE_APPLICATION_CREDENTIALS to the GCP credential file.
  tracer tracer = 25;

  // A comma separated list of outbound ports to be excluded from redirection to Envoy.

 * which are <i>not the caller's fault</i>. Doing so is <b>not recommended</b> because it is
 * misleading to future readers of the code and of stack traces. See <a
 * href="https://github.com/google/guava/wiki/ConditionalFailuresExplained">Conditional failures
 * explained</a> in the Guava User Guide for more advice. Notably, {@link Verify} offers assertions

 * which are <i>not the caller's fault</i>. Doing so is <b>not recommended</b> because it is
 * misleading to future readers of the code and of stack traces. See <a
 * href="https://github.com/google/guava/wiki/ConditionalFailuresExplained">Conditional failures
 * explained</a> in the Guava User Guide for more advice. Notably, {@link Verify} offers assertions

							instances[i].set_focus();
							break;
						}
					}
				}
				// if no other instance found
				if(n === focused_instance) { focused_instance = -1; }
				// remove all traces of jstree in the DOM (only the ones set using jstree*) and cleans all events
				this.get_container()
					.unbind(".jstree")
					.undelegate(".jstree")
					.removeData("jstree_instance_id")

	// For stats, check if this GC was forced by the user.
	// Update it under gcsema to avoid gctrace getting wrong values.
	work.userForced = trigger.kind == gcTriggerCycle

	trace := traceAcquire()
	if trace.ok() {
		trace.GCStart()
		traceRelease(trace)
	}

	// Check that all Ps have finished deferred mcache flushes.
	for _, p := range allp {
		if fg := p.mcache.flushGen.Load(); fg != mheap_.sweepgen {

	}
	xremoveall(workdir)
}

// Remove trailing spaces.
func chomp(s string) string {
	return strings.TrimRight(s, " \t\r\n")
}

// findgoversion determines the Go version to use in the version string.
// It also parses any other metadata found in the version file.
func findgoversion() string {
	// The $GOROOT/VERSION file takes priority, for distributions
	// without the source repo.

	}
	// How much to try. These defaults take about 1 seconds
	// on a 2012 MacBook Pro. The ones in short mode take
	// about 0.1 seconds.
	tries := 10
	count := 1000000
	if testing.Short() {
		tries = 1
	}
	for try := 0; try < tries; try++ {
		var prof bytes.Buffer
		if err := StartCPUProfile(&prof); err != nil {
			t.Fatal(err)
		}
		for i := 0; i < count; i++ {
			runtime.Gosched()