Program: 72282
Project: 72282
Buggy source:
public String request(int sid,String msg){
  int playerIndex=0;
  for (int i=0; i < playerNum; i++) {
    if (allPlayers[i].SID == sid) {
      playerIndex=i;
      break;
    }
  }
  String result="String_Node_Str";
switch (gameState) {
case INIT:
    if (playerState[playerIndex] == 0) {
      result=GodHelper.toInit(allUserInfo,"String_Node_Str",heroList);
      playerState[playerIndex]+=1;
    }
 else     if (playerState[playerIndex] == 1) {
      heroChoose(sid,msg);
      gameState=GameState.MAPINIT;
      playerState[playerIndex]=0;
      result=GodHelper.toChooseHero("String_Node_Str",heroChoices,teamResult);
    }
  break;
case MAPINIT:
break;
case MAINGAME:
switch (phaseState) {
case PREPARE:
if (playerState[playerIndex] == 0) {
  gc.cardDistribute(cardHeap,allPlayers[playerIndex],4);
  playerHandCard=new int[allPlayers[playerIndex].handCardsNum];
  result=GodHelper.toCardDistribute("String_Node_Str",playerHandCard);
  playerState[playerIndex]+=1;
}
 else if (playerState[playerIndex] == 1) {
  allPlayers[playerIndex].gamble=GodHelper.getChooseDecision(msg).decision();
  allPlayers[playerIndex].gambleNum=GodHelper.getChooseDecision(msg).cardNum();
  result=GodHelper.toChooseDecision("String_Node_Str");
  playerState[playerIndex]+=1;
}
 else if (playerState[playerIndex] == 2) {
  featureChoose(sid,msg);
  phaseState=PhaseState.GAMBLE;
  playerState[playerIndex]=0;
}
break;
case GAMBLE:
break;
case ACTION:
break;
}
break;
}
if (result.equals("String_Node_Str")) {
System.out.printf("String_Node_Str",sid,msg,gameState.toString());
}
return result;
}

Fixed version (ground truth):
public String request(int sid,String msg){
  int playerIndex=0;
  for (int i=0; i < playerNum; i++) {
    if (allPlayers[i].SID == sid) {
      playerIndex=i;
      break;
    }
  }
  String result="String_Node_Str";
switch (gameState) {
case INIT:
    if (playerState[playerIndex] == 0) {
      result=GodHelper.toInit(allUserInfo,"String_Node_Str",heroList);
      playerState[playerIndex]+=1;
    }
 else     if (playerState[playerIndex] == 1) {
      heroChoose(sid,msg);
      gameState=GameState.MAINGAME;
      playerState[playerIndex]=0;
      result=GodHelper.toChooseHero("String_Node_Str",heroChoices,teamResult);
    }
  break;
case MAINGAME:
switch (phaseState) {
case PREPARE:
  if (playerState[playerIndex] == 0) {
    GambleChecker.cardDistribute(cardHeap,allPlayers[playerIndex],4);
    playerHandCard=new int[allPlayers[playerIndex].handCardsNum];
    result=GodHelper.toCardDistribute("String_Node_Str",playerHandCard);
    playerState[playerIndex]+=1;
  }
 else   if (playerState[playerIndex] == 1) {
    MsgChooseDecision des=GodHelper.getChooseDecision(msg);
    allPlayers[playerIndex].gamble=des.decision();
    allPlayers[playerIndex].gambleNum=des.cardNum();
    result=GodHelper.toChooseDecision("String_Node_Str");
    playerState[playerIndex]+=1;
  }
 else   if (playerState[playerIndex] == 2) {
    featureChoose(sid,msg);
    phaseState=PhaseState.GAMBLE;
    playerState[playerIndex]=0;
  }
break;
case GAMBLE:
break;
case ACTION:
break;
}
break;
}
if (result.equals("String_Node_Str")) {
System.out.printf("String_Node_Str",sid,msg,gameState.toString());
}
return result;
}