[Demonstration 1]

[Buggy Method]
public Rule loadRuleByName(String ruleName) throws InvalidConfigException {
    Rule rule = ruleMap.get(ruleName);
    if (rule == null) {
        String fileName = ruleName + ".json";
        InputStream stream = ClassLoader.class.getResourceAsStream("/" + fileName);
        if (stream == null) {
            throw new InvalidConfigException("Unable to find rule file: " + fileName);
        }
        try {
            RuleConfig ruleConfig = objectMapper.readValue(stream, RuleConfig.class);
            rule = getRule(ruleConfig);
        } catch (IOException ex) {
            throw new InvalidConfigException("Unable to parse rule file: " + ruleName, ex);
        }
    }
    return rule;
}

[Buggy Hunk]
InputStream stream = ClassLoader.class.getResourceAsStream("/" + fileName);

[Patch]
InputStream stream = getFileFromClasspath(fileName);

[Demonstration 2]

[Buggy Method]
private void loadApp(String rootFolder, ValidationCtx vtx) {
    for (String fn : new File(rootFolder).list()) {
        if (fn.endsWith(EXTN) == false) {
            continue;
        }
        String id = fn.substring(0, fn.length() - EXTN.length());
        CompilationUnit cpu = new CompilationUnit(id, null, false);
        this.compilationUnits.put(id, cpu);
        Application app = new Application();
        try {
            if (XmlUtil.xmlToObject(rootFolder + fn, app, "application") == false) {
                logger.info("File " + fn + " in the root comp folder is not parsed as it is not an application file.");
                continue;
            }
        } catch (XmlParseException e) {
            logger.info("File " + fn + " has xml syntax errors.");
            continue;
        }
        Comp comp = this.createComp(null, id, app, cpu, vtx);
        this.apps.put(id, comp);
    }
}

[Buggy Hunk]
Comp comp = this.createComp(null, id, app, cpu, vtx);

[Patch]
Comp comp = this.createComp(null, id, app, cpu, vtx, false);

[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));