Program: 156528
Project: 156528
Buggy source:
public boolean checkRequirements(TileAbstractBuilder builder,Schematic slot){
  LinkedList<ItemStack> tmpReq=new LinkedList<ItemStack>();
  try {
    LinkedList<ItemStack> req=new LinkedList<ItemStack>();
    slot.getRequirementsForPlacement(context,req);
    for (    ItemStack stk : req) {
      if (stk != null) {
        tmpReq.add(stk.copy());
      }
    }
  }
 catch (  Throwable t) {
    t.printStackTrace();
    BCLog.logger.throwing(t);
  }
  LinkedList<ItemStack> stacksUsed=new LinkedList<ItemStack>();
  if (context.world().getWorldInfo().getGameType() == GameType.CREATIVE) {
    for (    ItemStack s : tmpReq) {
      stacksUsed.add(s);
    }
    return !(builder.energyAvailable() < slot.getEnergyRequirement(stacksUsed));
  }
  for (  ItemStack reqStk : tmpReq) {
    boolean itemBlock=reqStk.getItem() instanceof ItemBlock;
    Fluid fluid=itemBlock ? FluidRegistry.lookupFluidForBlock(((ItemBlock)reqStk.getItem()).field_150939_a) : null;
    if (fluid != null && builder.drainBuild(new FluidStack(fluid,FluidContainerRegistry.BUCKET_VOLUME),true)) {
      continue;
    }
    for (    IInvSlot slotInv : InventoryIterator.getIterable(new InventoryCopy(builder),ForgeDirection.UNKNOWN)) {
      if (!builder.isBuildingMaterialSlot(slotInv.getIndex())) {
        continue;
      }
      ItemStack invStk=slotInv.getStackInSlot();
      if (invStk == null || invStk.stackSize == 0) {
        continue;
      }
      FluidStack fluidStack=fluid != null ? FluidContainerRegistry.getFluidForFilledItem(invStk) : null;
      boolean compatibleContainer=fluidStack != null && fluidStack.getFluid() == fluid && fluidStack.amount >= FluidContainerRegistry.BUCKET_VOLUME;
      if (StackHelper.isEqualItem(reqStk,invStk) || compatibleContainer) {
        try {
          stacksUsed.add(slot.useItem(context,reqStk,slotInv));
        }
 catch (        Throwable t) {
          t.printStackTrace();
          BCLog.logger.throwing(t);
        }
        if (reqStk.stackSize == 0) {
          break;
        }
      }
    }
    if (reqStk.stackSize != 0) {
      return false;
    }
  }
  return builder.energyAvailable() >= slot.getEnergyRequirement(stacksUsed);
}

Fixed version (ground truth):
public boolean checkRequirements(TileAbstractBuilder builder,Schematic slot){
  LinkedList<ItemStack> tmpReq=new LinkedList<ItemStack>();
  try {
    LinkedList<ItemStack> req=new LinkedList<ItemStack>();
    slot.getRequirementsForPlacement(context,req);
    for (    ItemStack stk : req) {
      if (stk != null) {
        tmpReq.add(stk.copy());
      }
    }
  }
 catch (  Throwable t) {
    t.printStackTrace();
    BCLog.logger.throwing(t);
  }
  LinkedList<ItemStack> stacksUsed=new LinkedList<ItemStack>();
  if (context.world().getWorldInfo().getGameType() == GameType.CREATIVE) {
    for (    ItemStack s : tmpReq) {
      stacksUsed.add(s);
    }
    return !(builder.energyAvailable() < slot.getEnergyRequirement(stacksUsed));
  }
  for (  ItemStack reqStk : tmpReq) {
    boolean itemBlock=reqStk.getItem() instanceof ItemBlock;
    Fluid fluid=itemBlock ? FluidRegistry.lookupFluidForBlock(((ItemBlock)reqStk.getItem()).field_150939_a) : null;
    if (fluid != null && builder.drainBuild(new FluidStack(fluid,FluidContainerRegistry.BUCKET_VOLUME),true)) {
      continue;
    }
    for (    IInvSlot slotInv : InventoryIterator.getIterable(new InventoryCopy(builder),ForgeDirection.UNKNOWN)) {
      if (!builder.isBuildingMaterialSlot(slotInv.getIndex())) {
        continue;
      }
      ItemStack invStk=slotInv.getStackInSlot();
      if (invStk == null || invStk.stackSize == 0) {
        continue;
      }
      FluidStack fluidStack=fluid != null ? FluidContainerRegistry.getFluidForFilledItem(invStk) : null;
      boolean compatibleContainer=fluidStack != null && fluidStack.getFluid() == fluid && fluidStack.amount >= FluidContainerRegistry.BUCKET_VOLUME;
      if (slot.isItemMatchingRequirement(invStk,reqStk) || compatibleContainer) {
        try {
          stacksUsed.add(slot.useItem(context,reqStk,slotInv));
        }
 catch (        Throwable t) {
          t.printStackTrace();
          BCLog.logger.throwing(t);
        }
        if (reqStk.stackSize == 0) {
          break;
        }
      }
    }
    if (reqStk.stackSize != 0) {
      return false;
    }
  }
  return builder.energyAvailable() >= slot.getEnergyRequirement(stacksUsed);
}