buildcfg.GOARCH = "ppc64le"
	buildcfg.GOPPC64 = 8
	buildop(nil)
	optabLen := len(optab)
	buildcfg.GOPPC64 = 9
	buildop(nil)
	reinitOptabLen := len(optab)
	if reinitOptabLen != optabLen {
		t.Errorf("rerunning buildop changes optab size from %d to %d", optabLen, reinitOptabLen)
	}

====

[[sec:hidden_tasks]]
== Private and hidden tasks

Gradle doesn't support marking a task as _private_.

However, tasks will only show up when running `:tasks` if `task.group` is set or no other task depends on it.

For instance, the following task will not appear when running `./gradlew :app:tasks` because it does not have a group; it is called a _hidden_ task:

====
[.multi-language-sample]
=====
.app/build.gradle.kts

2. They facilitate incremental building. +
For example, suppose Gradle recognizes that the inputs and outputs of a task remain unchanged. In that case, it can leverage results from previous build runs or the build cache, avoiding rerunning the task action altogether.

    private final CountDownLatch stopLatch = new CountDownLatch(1);

    private volatile boolean running = false;

    @Override
    public @Nullable Void call() throws InterruptedException {
      running = true;
      startLatch.countDown();
      stopLatch.await();
      running = false;
      return null;
    }

    public void waitForStart() throws InterruptedException {

    private final CountDownLatch stopLatch = new CountDownLatch(1);

    private volatile boolean running = false;

    @Override
    public @Nullable Void call() throws InterruptedException {
      running = true;
      startLatch.countDown();
      stopLatch.await();
      running = false;
      return null;
    }

    public void waitForStart() throws InterruptedException {

        }

        logger.info("Crawler is running");
        count = 0;
        isRunning = true;
        while (count < 300 && isRunning) { // Wait until the crawler terminates
            ThreadUtil.sleep(1000);
            count++;
            final Map<String, Object> scheduler = getSchedulerItem(namePrefix);
            assertTrue(scheduler.containsKey("running"));
            isRunning = (Boolean) scheduler.get("running");

        }

			// count and the scheduler skips suspended
			// goroutines? That wouldn't be enough for
			// {_Gsyscall,_Gwaiting} -> _Grunning. Maybe
			// for all those transitions we need to check
			// suspended and deschedule?
			return suspendGState{g: gp, stopped: stopped}

		case _Grunning:
			// Optimization: if there is already a pending preemption request
			// (from the previous loop iteration), don't bother with the atomics.

                startedCrawlerNum++;
                activeCrawlerNum++;
                ThreadUtil.sleep(crawlingExecutionInterval);
                continue;
            }

            // check status
            for (int i = 0; i < startedCrawlerNum; i++) {
                if (!dataCrawlingThreadList.get(i).isRunning() && Constants.RUNNING.equals(dataCrawlingThreadStatusList.get(i))) {

            listener
        );
    }

    private static void assertParentRunning(String message, BuildOperationDescriptor child, @Nullable BuildOperationState parent) {
        if (parent != null && !parent.isRunning()) {
            String parentName = parent.getDescription().getDisplayName();
            throw new IllegalStateException(String.format(message, child.getDisplayName(), parentName));
        }
    }

    @Nullable

	// not currently executing user code. The stack is not owned.
	_Grunnable // 1

	// _Grunning means this goroutine may execute user code. The
	// stack is owned by this goroutine. It is not on a run queue.
	// It is assigned an M and a P (g.m and g.m.p are valid).
	_Grunning // 2

	// _Gsyscall means this goroutine is executing a system call.
	// It is not executing user code. The stack is owned by this