Program: 31995
Project: 31995
Buggy source:
/** 
 * Returns the first notifiable bing rule which fulfills its condition with this event.
 * @param event the event
 * @return the first matched bing rule, null if none
 */
public BingRule fulfilledBingRule(Event event){
  if (null == event) {
    Log.e(LOG_TAG,"String_Node_Str");
    return null;
  }
  if (!mIsInitialized) {
    Log.e(LOG_TAG,"String_Node_Str");
    return null;
  }
  if (0 == mRules.size()) {
    Log.e(LOG_TAG,"String_Node_Str");
    return null;
  }
  if ((null != event.getSender()) && TextUtils.equals(event.getSender(),mMyUserId)) {
    return null;
  }
  String eventType=event.getType();
  if (TextUtils.equals(eventType,Event.EVENT_TYPE_PRESENCE) || TextUtils.equals(eventType,Event.EVENT_TYPE_TYPING) || TextUtils.equals(eventType,Event.EVENT_TYPE_REDACTION)|| TextUtils.equals(eventType,Event.EVENT_TYPE_RECEIPT)|| TextUtils.equals(eventType,Event.EVENT_TYPE_TAGS)) {
    return null;
  }
  final ArrayList<BingRule> rules;
synchronized (this) {
    rules=new ArrayList<>(mRules);
  }
  for (  BingRule bingRule : rules) {
    if (bingRule.isEnabled) {
      boolean isFullfilled=false;
      if (BingRule.RULE_ID_CONTAIN_USER_NAME.equals(bingRule.ruleId) || BingRule.RULE_ID_CONTAIN_DISPLAY_NAME.equals(bingRule.ruleId)) {
        if (Event.EVENT_TYPE_MESSAGE.equals(event.getType())) {
          Message message=JsonUtils.toMessage(event.getContent());
          MyUser myUser=mSession.getMyUser();
          String pattern=myUser.displayname;
          if (BingRule.RULE_ID_CONTAIN_USER_NAME.equals(bingRule.ruleId)) {
            if (mMyUserId.indexOf("String_Node_Str") >= 0) {
              pattern=mMyUserId.substring(1,mMyUserId.indexOf("String_Node_Str"));
            }
 else {
              pattern=mMyUserId;
            }
          }
          if (!TextUtils.isEmpty(pattern)) {
            isFullfilled=caseInsensitiveFind(pattern,message.body);
          }
        }
      }
 else       if (BingRule.RULE_ID_FALLBACK.equals(bingRule.ruleId)) {
        isFullfilled=true;
      }
 else {
        isFullfilled=eventMatchesConditions(event,bingRule.conditions);
      }
      if (isFullfilled) {
        return bingRule;
      }
    }
  }
  return null;
}

Fixed version (ground truth):
/** 
 * Returns the first notifiable bing rule which fulfills its condition with this event.
 * @param event the event
 * @return the first matched bing rule, null if none
 */
public BingRule fulfilledBingRule(Event event){
  if (null == event) {
    Log.e(LOG_TAG,"String_Node_Str");
    return null;
  }
  if (!mIsInitialized) {
    Log.e(LOG_TAG,"String_Node_Str");
    return null;
  }
  if (0 == mRules.size()) {
    Log.e(LOG_TAG,"String_Node_Str");
    return null;
  }
  if ((null != event.getSender()) && TextUtils.equals(event.getSender(),mMyUserId)) {
    return null;
  }
  String eventType=event.getType();
  if (TextUtils.equals(eventType,Event.EVENT_TYPE_PRESENCE) || TextUtils.equals(eventType,Event.EVENT_TYPE_TYPING) || TextUtils.equals(eventType,Event.EVENT_TYPE_REDACTION)|| TextUtils.equals(eventType,Event.EVENT_TYPE_RECEIPT)|| TextUtils.equals(eventType,Event.EVENT_TYPE_TAGS)) {
    return null;
  }
  final ArrayList<BingRule> rules;
synchronized (this) {
    rules=new ArrayList<>(mRules);
  }
  for (  BingRule bingRule : rules) {
    if (bingRule.isEnabled) {
      boolean isFullfilled=false;
      if (BingRule.RULE_ID_CONTAIN_USER_NAME.equals(bingRule.ruleId) || BingRule.RULE_ID_CONTAIN_DISPLAY_NAME.equals(bingRule.ruleId)) {
        if (Event.EVENT_TYPE_MESSAGE.equals(event.getType())) {
          Message message=JsonUtils.toMessage(event.getContent());
          MyUser myUser=mSession.getMyUser();
          String pattern;
          if (BingRule.RULE_ID_CONTAIN_USER_NAME.equals(bingRule.ruleId)) {
            if (mMyUserId.indexOf("String_Node_Str") >= 0) {
              pattern=mMyUserId.substring(1,mMyUserId.indexOf("String_Node_Str"));
            }
 else {
              pattern=mMyUserId;
            }
          }
 else           if (BingRule.RULE_ID_CONTAIN_DISPLAY_NAME.equals(bingRule.ruleId)) {
            pattern=myUser.displayname;
            if ((null != mSession.getDataHandler()) && (null != mSession.getDataHandler().getStore())) {
              Room room=mSession.getDataHandler().getStore().getRoom(event.roomId);
              if ((null != room) && (null != room.getLiveState())) {
                String disambiguousedName=room.getLiveState().getMemberName(mMyUserId);
                if (!TextUtils.equals(disambiguousedName,mMyUserId)) {
                  pattern=disambiguousedName;
                }
              }
            }
          }
          if (!TextUtils.isEmpty(pattern)) {
            isFullfilled=caseInsensitiveFind(pattern,message.body);
          }
        }
      }
 else       if (BingRule.RULE_ID_FALLBACK.equals(bingRule.ruleId)) {
        isFullfilled=true;
      }
 else {
        isFullfilled=eventMatchesConditions(event,bingRule.conditions);
      }
      if (isFullfilled) {
        return bingRule;
      }
    }
  }
  return null;
}