[Demonstration 1]

[Buggy Method]
public File getBasePath() {
    return repoManager.getBasePath().toFile();
}

[Buggy Hunk]
return repoManager.getBasePath().toFile();

[Patch]
return basePath;

[Demonstration 2]

[Buggy Method]
@Override
public Object getValueAt(int rowIndex, int columnIndex) {
    Object columnValue = null;
    if ((rowIndex >= 0) && (rowIndex < getRowCount())) {
        if (rowIndex == 0) {
            if ((columnIndex > 0) && (columnIndex < getColumnCount())) {
                columnValue = this.columnNames[columnIndex];
            } else {
                columnValue = "";
            }
        } else {
            if ((columnIndex > 0) && (columnIndex < getColumnCount())) {
                // here is where i should write the class data
                int dayAndTimeSlot = this.dayIndex * TimeslotPattern.NrOfTimeSlotsPerDay + rowIndex - 1;
                int studentGroupId = this.sortedStudentGroups.get(columnIndex - 1).getId();
                int classId = this.data.GetStudentGroupAssignment(studentGroupId, dayAndTimeSlot);
                Class aClass = this.data.GetClassById(classId);
                if (aClass == null) {
                    columnValue = "";
                } else {
                    columnValue = aClass.getDisplayName();
                }
            } else {
                columnValue = this.rowNames[rowIndex];
            }
        }
    }
    return columnValue;
}

[Buggy Hunk]
columnValue = "";

[Patch]
columnValue = TimePreferences.DayOfTheWeek.values()[this.dayIndex];

[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));