Program: 172081
Project: 172081
Buggy source:
@Override public void notify(DelegateTask task){
  propertyConverter.setDefaultTaskProperties(task);
  String taskFormKey=getFormKey(task);
  TypeDefinition typeDefinition=propertyConverter.getWorkflowObjectFactory().getTaskTypeDefinition(taskFormKey,false);
  taskFormKey=typeDefinition.getName().toPrefixString();
  task.setVariableLocal(ActivitiConstants.PROP_TASK_FORM_KEY,taskFormKey);
  ActivitiScriptNode initiatorNode=(ActivitiScriptNode)task.getExecution().getVariable(WorkflowConstants.PROP_INITIATOR);
  if (initiatorNode != null) {
    task.addUserIdentityLink((String)initiatorNode.getProperties().get(ContentModel.PROP_USERNAME.toPrefixString()),IdentityLinkType.STARTER);
  }
  ExecutionEntity executionEntity=((ExecutionEntity)task.getExecution()).getProcessInstance();
  Boolean value=(Boolean)executionEntity.getVariable(WorkflowNotificationUtils.PROP_SEND_EMAIL_NOTIFICATIONS);
  if (Boolean.TRUE.equals(value) == true) {
    NodeRef workflowPackage=null;
    ActivitiScriptNode scriptNode=(ActivitiScriptNode)executionEntity.getVariable(WorkflowNotificationUtils.PROP_PACKAGE);
    if (scriptNode != null) {
      workflowPackage=scriptNode.getNodeRef();
    }
    String[] authorities=null;
    boolean isPooled=false;
    if (task.getAssignee() == null) {
      isPooled=true;
      List<IdentityLinkEntity> identities=((TaskEntity)task).getIdentityLinks();
      List<String> temp=new ArrayList<String>(identities.size());
      for (      IdentityLinkEntity item : identities) {
        String group=item.getGroupId();
        if (group != null) {
          temp.add(group);
        }
        String user=item.getUserId();
        if (user != null) {
          temp.add(user);
        }
      }
      authorities=temp.toArray(new String[temp.size()]);
    }
 else {
      authorities=new String[]{task.getAssignee()};
    }
    String title;
    if (taskFormKey != null) {
      title=taskFormKey.replace("String_Node_Str","String_Node_Str");
    }
 else {
      title=task.getName().replaceAll("String_Node_Str","String_Node_Str");
    }
    String workflowDefId=task.getProcessDefinitionId().split("String_Node_Str")[0];
    String taskType=workflowDefId + "String_Node_Str" + title+ "String_Node_Str";
    workflowNotificationUtils.sendWorkflowAssignedNotificationEMail(ActivitiConstants.ENGINE_ID + "String_Node_Str" + task.getId(),taskType,task.getDescription(),task.getDueDate(),Integer.valueOf(task.getPriority()),workflowPackage,authorities,isPooled);
  }
}

Fixed version (ground truth):
@Override public void notify(DelegateTask task){
  propertyConverter.setDefaultTaskProperties(task);
  String taskFormKey=getFormKey(task);
  TypeDefinition typeDefinition=propertyConverter.getWorkflowObjectFactory().getTaskTypeDefinition(taskFormKey,false);
  taskFormKey=typeDefinition.getName().toPrefixString();
  task.setVariableLocal(ActivitiConstants.PROP_TASK_FORM_KEY,taskFormKey);
  ActivitiScriptNode initiatorNode=(ActivitiScriptNode)task.getExecution().getVariable(WorkflowConstants.PROP_INITIATOR);
  if (initiatorNode != null) {
    task.addUserIdentityLink((String)initiatorNode.getProperties().get(ContentModel.PROP_USERNAME.toPrefixString()),IdentityLinkType.STARTER);
  }
  ExecutionEntity executionEntity=((ExecutionEntity)task.getExecution()).getProcessInstance();
  Boolean value=(Boolean)executionEntity.getVariable(WorkflowNotificationUtils.PROP_SEND_EMAIL_NOTIFICATIONS);
  if (Boolean.TRUE.equals(value) == true) {
    NodeRef workflowPackage=null;
    ActivitiScriptNode scriptNode=(ActivitiScriptNode)executionEntity.getVariable(WorkflowNotificationUtils.PROP_PACKAGE);
    if (scriptNode != null) {
      workflowPackage=scriptNode.getNodeRef();
    }
    String[] authorities=null;
    boolean isPooled=false;
    if (task.getAssignee() == null) {
      isPooled=true;
      List<IdentityLinkEntity> identities=((TaskEntity)task).getIdentityLinks();
      List<String> temp=new ArrayList<String>(identities.size());
      for (      IdentityLinkEntity item : identities) {
        String group=item.getGroupId();
        if (group != null) {
          temp.add(group);
        }
        String user=item.getUserId();
        if (user != null) {
          temp.add(user);
        }
      }
      authorities=temp.toArray(new String[temp.size()]);
    }
 else {
      authorities=new String[]{task.getAssignee()};
    }
    String title;
    if (task.getName() != null) {
      title=task.getName();
    }
 else {
      title=taskFormKey.replace("String_Node_Str","String_Node_Str");
    }
    workflowNotificationUtils.sendWorkflowAssignedNotificationEMail(ActivitiConstants.ENGINE_ID + "String_Node_Str" + task.getId(),title,task.getDescription(),task.getDueDate(),Integer.valueOf(task.getPriority()),workflowPackage,authorities,isPooled);
  }
}