[Demonstration 1]

[Buggy Method]
private void checkStatus(URI uri) throws IOException {
    int statusCode = response.getStatusLine().getStatusCode();
    if (statusCode == 200)
        return;
    throw new RuntimeException(String.format("HTTP Error occurred%nStatus code: %d%nURI: %s%nResponse body: %s", statusCode, uri.toString(), response.getEntity().getContent()));
}

[Buggy Hunk]
response.getEntity().getContent()

[Patch]
EntityUtils.toString(response.getEntity())

[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]
public static String downloadPage(final HttpClient httpClient, final HttpGet request) throws IOException {
    LOGGER.info("Downloading " + request.getURI());
    final HttpResponse response = httpClient.execute(request);
    LOGGER.info(response.getStatusLine());
    final HttpEntity entity = response.getEntity();
    if (entity != null) {
        final InputStream in = entity.getContent();
        try {
            final List<String> lines = IOUtils.readLines(in);
            return StringUtils.join(lines, '\n');
        } catch (final IOException e) {
            throw e;
        } catch (final RuntimeException e) {
            request.abort();
            throw e;
        } finally {
            in.close();
        }
    }
    return null;
}

[Buggy Hunk]
final List<String> lines = IOUtils.readLines(in);

[Patch]
final List<String> lines = IOUtils.readLines(in, StandardCharsets.UTF_8);