#fixed code
                                public static void assumeDocker() throws Exception {
        assumeDocker(new VersionNumber(DEFAULT_MINIMUM_VERSION));
    }
#vulnerable code 
                                public static void assumeDocker() throws Exception {
        Launcher.LocalLauncher localLauncher = new Launcher.LocalLauncher(StreamTaskListener.NULL);
        try {
            Assume.assumeThat("Docker working", localLauncher.launch().cmds(DockerTool.getExecutable(null, null, null, null), "ps").start().joinWithTimeout(DockerClient.CLIENT_TIMEOUT, TimeUnit.SECONDS, localLauncher.getListener()), is(0));
        } catch (IOException x) {
            Assume.assumeNoException("have Docker installed", x);
        }
        DockerClient dockerClient = new DockerClient(localLauncher, null, null);
        Assume.assumeFalse("Docker version not < 1.3", dockerClient.version().isOlderThan(new VersionNumber("1.3")));
    } 
                            #location 9 
                            #vulnerability type NULL_DEREFERENCE