Question

I have an really estrange error. I got an object attribute of int type called currentState

here is the declaration

class WorkerAgent : public BaseAgent {

private:
    int currentState;

The code below runs a lot of times inside a loop of a game but SOMETIMES (in a random time) the code chashes the program at the line (270)

*OBS: currentState is initialized already when running this line of code (270)!

if (currentState == REPAIRING) {

    if (!unit->isRepairing()) {

        setState(GATHER_MINERALS);
        BaseAgent* base = AgentManager::getInstance()->getClosestBase(unit->getTilePosition());

        if (base != NULL) {

            unit->rightClick(base->getUnit());
            return;
        }
    } else {

        return;
    }
}

int cur = currentState; // (line 270) 
bool b = cur == FIND_BUILDSPOT; 

I have an EXCEPTION_ACCESS_VIOLATION and the program chashes.. I dont know can be happening since currentState is not a pointer neither cur

Error

VERSION: 1.16.1.1
BWAPI:
  REVISION: 4160
  BUILD: RELEASE
  ERROR: None
  LOCATION: Single Player 
MAP: Stepping Stones
     (3)Stepping Stones.scm

EXCEPTION: 0xC0000005    EXCEPTION_ACCESS_VIOLATION
FAULT:     0x10044217    BWAPI.dll
REGISTERS:
  EDI: 00000140
  ESI: 00000003
  EBX: 00000000
  EDX: C208C483
  ECX: 5B46A60C
  EAX: 035F0001
  EBP: 0018EEE8
  EIP: 10044217
  ESP: 0018E4C4
STACK:
  BWAPI.dll         0x10044217      ----
  BWAPI.dll         0x10046C38      ----
  BWAPI.dll         0x10047A43      ----
  BWAPI.dll         0x100408C6      ----
  DUMB.DLL          0x5B4254A0    WorkerAgent::computeActions
    d:\programming\mestrado\bots\dumb\bthaimodule\source\workeragent.cpp:270

Any other information about the case, please ask me! I’am getting crazy with this problem!

Answer 1

currentState is a member of your class WorkerAgent, which means you have to have a valid object of type WorkerAgent for currentState to exist.

You’re probably using an invalid (null, uninitalized, deleted, or otherwise garbage) pointer to a WorkerAgent in code you haven’t shown us.