#fixed code
                                public int run() throws Throwable {
        ClassLoader jenkins = createJenkinsWarClassLoader();
        ClassLoader setup = createSetupClassLoader(jenkins);

        Thread.currentThread().setContextClassLoader(setup);    // or should this be 'jenkins'?

        Class<?> c = setup.loadClass("io.jenkins.jenkinsfile.runner.App");
        return (int)c.getMethod("run",File.class,File.class).invoke(
                c.newInstance(), warDir, pluginsDir
        );
    }
#vulnerable code 
                                public int run() throws Throwable {
        ClassLoader jenkins = createJenkinsWarClassLoader();
        ClassLoader setup = createSetupClassLoader(jenkins);

        Class<?> c = setup.loadClass("io.jenkins.jenkinsfile.runner.App");
        return (int)c.getMethod("run",File.class,File.class).invoke(
                c.newInstance(), warDir, pluginsDir
        );
    } 
                            #location 5 
                            #vulnerability type RESOURCE_LEAK