#vulnerable code 
                                public final boolean bind(final String addr)
    {
        lock();

        try {
            if (ctxTerminated) {
                errno.set(ZError.ETERM);
                return false;
            }

            options.mechanism.check(options);

            //  Process pending commands, if any.
            boolean brc = processCommands(0, false);
            if (!brc) {
                return false;
            }

            SimpleURI uri = SimpleURI.create(addr);
            String address = uri.getAddress();

            NetProtocol protocol = checkProtocol(uri.getProtocol());
            if (protocol == null) {
                return false;
            }

            switch(protocol) {
            case inproc: {
                Ctx.Endpoint endpoint = new Ctx.Endpoint(this, options);
                boolean rc = registerEndpoint(addr, endpoint);
                if (rc) {
                    connectPending(addr, this);
                    // Save last endpoint URI
                    options.lastEndpoint = addr;
                }
                else {
                    errno.set(ZError.EADDRINUSE);
                }
                return rc;
            }
            case pgm:
                // continue
            case epgm:
                // continue
            case norm:
                //  For convenience's sake, bind can be used interchangeable with
                //  connect for PGM, EPGM and NORM transports.
                return connect(addr);
            case tcp:
                // continue
            case ipc:
                // continue
            case tipc: {
                //  Remaining transports require to be run in an I/O thread, so at this
                //  point we'll choose one.
                IOThread ioThread = chooseIoThread(options.affinity);
                if (ioThread == null) {
                    errno.set(ZError.EMTHREAD);
                    return false;
                }

                Listener listener = protocol.getListener(ioThread, this, options);
                boolean rc = listener.setAddress(address);
                if (!rc) {
                    listener.destroy();
                    eventBindFailed(address, errno.get());
                    return false;
                }

                // Save last endpoint URI
                options.lastEndpoint = listener.getAddress();

                addEndpoint(options.lastEndpoint, listener, null);
                return true;
            }
            default:
                throw new IllegalArgumentException(addr);
            }
        }
        finally {
            unlock();
        }
    } 
                            #location 63 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                public final boolean bind(final String addr)
    {
        lock();

        try {
            if (ctxTerminated) {
                errno.set(ZError.ETERM);
                return false;
            }

            options.mechanism.check(options);

            //  Process pending commands, if any.
            boolean brc = processCommands(0, false, null);
            if (!brc) {
                return false;
            }

            SimpleURI uri = SimpleURI.create(addr);
            String address = uri.getAddress();

            NetProtocol protocol = checkProtocol(uri.getProtocol());
            if (protocol == null) {
                return false;
            }

            switch(protocol) {
            case inproc: {
                Ctx.Endpoint endpoint = new Ctx.Endpoint(this, options);
                boolean rc = registerEndpoint(addr, endpoint);
                if (rc) {
                    connectPending(addr, this);
                    // Save last endpoint URI
                    options.lastEndpoint = addr;
                }
                else {
                    errno.set(ZError.EADDRINUSE);
                }
                return rc;
            }
            case pgm:
                // continue
            case epgm:
                // continue
            case norm:
                //  For convenience's sake, bind can be used interchangeable with
                //  connect for PGM, EPGM and NORM transports.
                return connect(addr);
            case tcp:
                // continue
            case ipc:
                // continue
            case tipc: {
                //  Remaining transports require to be run in an I/O thread, so at this
                //  point we'll choose one.
                IOThread ioThread = chooseIoThread(options.affinity);
                if (ioThread == null) {
                    errno.set(ZError.EMTHREAD);
                    return false;
                }

                Listener listener = protocol.getListener(ioThread, this, options);
                boolean rc = listener.setAddress(address);
                if (!rc) {
                    listener.destroy();
                    eventBindFailed(address, errno.get());
                    return false;
                }

                // Save last endpoint URI
                options.lastEndpoint = listener.getAddress();

                addEndpoint(options.lastEndpoint, listener, null);
                return true;
            }
            default:
                throw new IllegalArgumentException(addr);
            }
        }
        finally {
            unlock();
        }
    }