[Demonstration 1]

[Buggy Method]
public static void deleteBucketsWithDataPolicy(final String dataPolicyName, final Ds3Client client) {
    if (isEmpty(dataPolicyName)) {
        //This might not be an error if this function is called as part of cleanup code
        LOG.debug("Data policy name is null or empty");
        return;
    }
    //Get all buckets using the data policy
    try {
        final GetBucketsSpectraS3Response bucketsResponse = client.getBucketsSpectraS3(new GetBucketsSpectraS3Request().withDataPolicyId(dataPolicyName));
        final BucketList bucketList = bucketsResponse.getBucketListResult();
        for (final Bucket bucket : bucketList.getBuckets()) {
            // delete each
            final DeleteBucketSpectraS3Response deleteBucketSpectraS3Response = client.deleteBucketSpectraS3(new DeleteBucketSpectraS3Request(bucket.getName()));
            assertThat(deleteBucketSpectraS3Response.getStatusCode(), is(204));
        }
    } catch (final IOException | AssertionError e) {
        LOG.error("Bucket assigned to data policy was not deleted as expected: " + dataPolicyName, e);
    }
    // Verify that no buckets are attached to the data policy
    try {
        final GetBucketsSpectraS3Response bucketsResponse = client.getBucketsSpectraS3(new GetBucketsSpectraS3Request().withDataPolicyId(dataPolicyName));
        final BucketList bucketList = bucketsResponse.getBucketListResult();
        if (!Guard.isNullOrEmpty(bucketList.getBuckets())) {
            LOG.error("Buckets using data policy still exist despite deletion attempt");
        }
    } catch (final IOException e) {
        LOG.error("Failed getting buckets to verify none use data policy " + dataPolicyName, e);
    }
}

[Buggy Hunk]
LOG.error("Bucket assigned to data policy was not deleted as expected: " + dataPolicyName, e);

[Patch]
LOG.error("Bucket assigned to data policy {} was not deleted as expected.", dataPolicyName, e);

[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 synchronized SortedSet<Integer> getSourceIds() {
    return sourceIds;
}

[Buggy Hunk]
public synchronized SortedSet< Integer > getSourceIds()

[Patch]
public SortedSet< Integer > getSourceIds()