[Demonstration 1]

[Buggy Method]
public Batch<CaseFile> casesForRegion(Region region) {
    final Batch<CaseFile> cases = new Batch();
    for (CaseFile file : files) if (file.isActiveSuspect()) {
        Place seen = file.trueLocation();
        if (seen != null && seen.region() == region)
            cases.add(file);
    }
    return cases;
}

[Buggy Hunk]
for (CaseFile file : files) if (file.isActiveSuspect()) {

[Patch]
for (CaseFile file : files) if (file.lastSuspectEvent() != null) {

[Demonstration 2]

[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));

[Demonstration 3]

[Buggy Method]
@Override
public Iterator<OptionValue> iterator() {
    final Map<String, OptionValue> buildList = CaseInsensitiveMap.newHashMap();
    // populate the default options
    for (final Map.Entry<String, OptionValue> entry : defaults.entrySet()) {
        buildList.put(entry.getKey(), entry.getValue());
    }
    // override if changed
    for (final Map.Entry<String, PersistedOptionValue> entry : Lists.newArrayList(options.getAll())) {
        final String name = entry.getKey();
        final OptionDefinition optionDefinition = getOptionDefinition(name);
        final PersistedOptionValue persistedOptionValue = entry.getValue();
        final OptionValue optionValue = persistedOptionValue.toOptionValue(optionDefinition, OptionValue.OptionScope.SESSION);
        buildList.put(name, optionValue);
    }
    return buildList.values().iterator();
}

[Buggy Hunk]
.toOptionValue(optionDefinition, OptionValue.OptionScope.SESSION);

[Patch]
.toOptionValue(optionDefinition, OptionValue.OptionScope.SYSTEM);