[Demonstration 1]

[Buggy Method]
@Override
protected void configure(HttpSecurity http) throws Exception {
    http.authorizeRequests().antMatchers("/", "/login").permitAll().antMatchers("/admin/**").access("hasRole('ADMIN')").and().formLogin().loginPage("/login").and().exceptionHandling().accessDeniedPage("/Access_Denied");
}

[Buggy Hunk]
protected void configure(HttpSecurity http) throws Exception {

[Patch]
protected final void configure(final HttpSecurity http) throws Exception {

[Demonstration 2]

[Buggy Method]
@Override
protected void configure(HttpSecurity http) throws Exception {
    http.headers().frameOptions().disable().and().csrf().disable().authorizeRequests().antMatchers("${jdbc.cs.successUrl}").hasAnyRole("ADMIN", "USER").antMatchers("/controller/**").hasAnyRole("ADMIN", "USER").and().anonymous().disable().sessionManagement().sessionFixation().none().invalidSessionUrl("/login.html").and().formLogin().loginPage("/login.html").defaultSuccessUrl("/controller/security/loginEntry", true).loginProcessingUrl("/j_spring_security_check").usernameParameter("j_username").passwordParameter("j_password").failureForwardUrl("/login.html").and().logout().logoutUrl("/j_spring_security_logout").invalidateHttpSession(true).logoutSuccessUrl("/login.html");
}

[Buggy Hunk]
.antMatchers("${jdbc.cs.successUrl}").hasAnyRole("ADMIN", "USER")

[Patch]
.antMatchers(successLoginUrl).hasAnyRole("ADMIN", "USER")

[Demonstration 3]

[Buggy Method]
public static Result service(String ownerName, String projectName, String service, boolean isAdvertise) throws IOException, UnsupportedOperationException, ServletException {
    if (!isSupportedService(service)) {
        return forbidden(String.format("Unsupported service: '%s'", service));
    }
    Project project = Project.findByOwnerAndProjectName(ownerName, projectName);
    if (project == null) {
        return notFound();
    }
    models.User user = UserApp.currentUser();
    if (!isAllowed(project, service)) {
        if (user.isAnonymous()) {
            return BasicAuthAction.unauthorized(response());
        } else {
            // If you want the Git client showing your custom message to
            // the user, the Content-Type should be exact "text/plain"
            // without any parameter. For more details, see the code at
            // https://github.com/git/git/commit/426e70d4a11ce3b4f70636d57c6a0ab16ae08a00#diff-eea0ad565ec5903a11b6023755d491cfR154
            response().setHeader("Content-Type", "text/plain");
            return forbidden(String.format("'%s' has no permission to '%s/%s'.", user.name, ownerName, projectName));
        }
    }
    if (isAdvertise) {
        return ok(RepositoryService.gitAdvertise(project, service, response()));
    } else {
        if (request().body().isMaxSizeExceeded()) {
            return status(REQUEST_ENTITY_TOO_LARGE);
        } else {
            user.visits(project);
            return ok(RepositoryService.gitRpc(project, service, request(), response()));
        }
    }
}

[Buggy Hunk]
user.name, ownerName, projectName));

[Patch]
user.loginId, ownerName, projectName));