c := make(chan bool)
	var a uint64
	go func() {
		atomic.AddUint64(&a, 1)
		c <- true
	}()
	a = 42
	<-c
}

// A nil pointer in an atomic operation should not deadlock
// the rest of the program. Used to hang indefinitely.
func TestNoRaceAtomicCrash(t *testing.T) {
	var mutex sync.Mutex
	var nilptr *int32
	panics := 0
	defer func() {
		if x := recover(); x != nil {

		// scheduler state, so we didn't gcstopm in findRunnable, but
		// also don't want to allow new goroutines to run.
		//
		// Deadlock here rather than in the findRunnable loop so if
		// findRunnable is stuck in a loop we don't perturb that
		// either.
		lock(&deadlock)
		lock(&deadlock)
	}

	// This thread is going to run a goroutine and is not spinning anymore,

			// CreateThread may fail if called
			// concurrently with ExitProcess. If this
			// happens, just freeze this thread and let
			// the process exit. See issue #18253.
			lock(&deadlock)
			lock(&deadlock)
		}
		print("runtime: failed to create new OS thread (have ", mcount(), " already; errno=", getlasterror(), ")\n")
		throw("runtime.newosproc")
	}

    /**
     * Runs the given action and disallows the current thread from attempting to acquire or release any project locks.
     * Applying this constraint means that the thread will not block waiting for a project lock and cause a deadlock.
     * This constraint also means that it does not need to release its project locks when it needs to block while waiting for some operation to complete.
     *

                        // block waiting for access to some other project, which means it can proceed even if some other thread is waiting for a project lock it
                        // holds without causing a deadlock. This in turn implies that this thread does not need to release the project locks it holds while

                requestCompleted(outcome);
            }
        } finally {
            httpExchange.close();
        }
    }

    // Dump all JVMs' threads on the machine to troubleshoot deadlock issues
    // We observed jstack hanging on windows, so for now we only enable it for Linux
    private void dumpThreadsUponTimeout(String stacktrace) {

	lock(&sched.deferlock)
	// disconnect cached list before dropping it on the floor,
	// so that a dangling ref to one entry does not pin all of them.
	var d, dlink *_defer
	for d = sched.deferpool; d != nil; d = dlink {
		dlink = d.link
		d.link = nil
	}
	sched.deferpool = nil
	unlock(&sched.deferlock)
}

// Timing

}

func lock(l *mutex) {
	lockWithRank(l, getLockRank(l))
}

func lock2(l *mutex) {
	if l.key == mutex_locked {
		// js/wasm is single-threaded so we should never
		// observe this.
		throw("self deadlock")
	}
	gp := getg()
	if gp.m.locks < 0 {
		throw("lock count")
	}
	gp.m.locks++
	l.key = mutex_locked
}

func unlock(l *mutex) {
	unlockWithRank(l)
}

func unlock2(l *mutex) {

	tlsConn := Server(conn, &Config{
		GetCertificate: func(*ClientHelloInfo) (*Certificate, error) {
			panic("unreachable")
		},
	})
	conn.tlsConn = tlsConn

	// This call should not deadlock.
	tlsConn.Close()
}

func TestRecordBadVersionTLS13(t *testing.T) {
	client, server := localPipe(t)
	defer server.Close()
	defer client.Close()

	config := testConfig.Clone()

                        const int in_flight_nodes_limit)
      : status_(TF_NewStatus()),
        // If the context's default exector is set to async, re-using that in
        // each thread would cause collectives to deadlock. For consistency we
        // create a new sync executor for every thread.
        //
        // TODO(allenl): We should have an async API that works with the
        // parallel device.
        device_(device),