Program: 8292
Project: 8292
Buggy source:
public void updateEmc(){
  this.checkSurroundingBlocks(false);
  int numRequest=this.getNumRequesting();
  if (this.getStoredEmc() == 0) {
    return;
  }
 else   if (hasKleinStar) {
    double toSend=this.getStoredEmc() < emcGen ? this.getStoredEmc() : emcGen;
    double starEmc=ItemPE.getEmc(inventory[0]);
    int maxStarEmc=EMCHelper.getKleinStarMaxEmc(inventory[0]);
    if ((starEmc + toSend) > maxStarEmc) {
      toSend=maxStarEmc - starEmc;
    }
    ItemPE.addEmc(inventory[0],toSend);
    this.removeEmc(toSend);
  }
 else   if (hasFuel) {
    ItemStack result=inventory[lockSlot] == null ? FuelMapper.getFuelUpgrade(inventory[0]) : inventory[lockSlot].copy();
    int upgradeCost=EMCHelper.getEmcValue(result) - EMCHelper.getEmcValue(inventory[0]);
    if (upgradeCost > 0 && this.getStoredEmc() >= upgradeCost) {
      ItemStack upgrade=inventory[upgradedSlot];
      if (inventory[upgradedSlot] == null) {
        this.removeEmc(upgradeCost);
        this.setInventorySlotContents(upgradedSlot,result);
        this.decrStackSize(0,1);
      }
 else       if (ItemHelper.basicAreStacksEqual(result,upgrade) && upgrade.stackSize < upgrade.getMaxStackSize()) {
        this.removeEmc(upgradeCost);
        inventory[upgradedSlot].stackSize++;
        this.decrStackSize(0,1);
      }
    }
  }
 else   if (numRequest > 0 && !this.isRequestingEmc) {
    double toSend=this.getStoredEmc() < emcGen ? this.getStoredEmc() : emcGen;
    this.sendEmcToRequesting(toSend / numRequest);
    this.sendRelayBonus();
    this.removeEmc(toSend);
  }
}

Fixed version (ground truth):
public void updateEmc(){
  this.checkSurroundingBlocks(false);
  int numRequest=this.getNumRequesting();
  if (this.getStoredEmc() == 0) {
    return;
  }
 else   if (hasKleinStar) {
    double toSend=this.getStoredEmc() < emcGen ? this.getStoredEmc() : emcGen;
    double starEmc=ItemPE.getEmc(inventory[0]);
    int maxStarEmc=EMCHelper.getKleinStarMaxEmc(inventory[0]);
    if ((starEmc + toSend) > maxStarEmc) {
      toSend=maxStarEmc - starEmc;
    }
    ItemPE.addEmc(inventory[0],toSend);
    this.removeEmc(toSend);
  }
 else   if (hasFuel) {
    if (FuelMapper.getFuelUpgrade(inventory[0]) == null) {
      this.setInventorySlotContents(0,null);
    }
    ItemStack result=inventory[lockSlot] == null ? FuelMapper.getFuelUpgrade(inventory[0]) : inventory[lockSlot].copy();
    int upgradeCost=EMCHelper.getEmcValue(result) - EMCHelper.getEmcValue(inventory[0]);
    if (upgradeCost > 0 && this.getStoredEmc() >= upgradeCost) {
      ItemStack upgrade=inventory[upgradedSlot];
      if (inventory[upgradedSlot] == null) {
        this.removeEmc(upgradeCost);
        this.setInventorySlotContents(upgradedSlot,result);
        this.decrStackSize(0,1);
      }
 else       if (ItemHelper.basicAreStacksEqual(result,upgrade) && upgrade.stackSize < upgrade.getMaxStackSize()) {
        this.removeEmc(upgradeCost);
        inventory[upgradedSlot].stackSize++;
        this.decrStackSize(0,1);
      }
    }
  }
 else   if (numRequest > 0 && !this.isRequestingEmc) {
    double toSend=this.getStoredEmc() < emcGen ? this.getStoredEmc() : emcGen;
    this.sendEmcToRequesting(toSend / numRequest);
    this.sendRelayBonus();
    this.removeEmc(toSend);
  }
}