Program: 165825
Project: 165825
Buggy source:
private boolean silkQuarryBlock(int rfNeeded,BlockPos srcPos,Block block){
  IBlockState srcState=worldObj.getBlockState(srcPos);
  int xCoord=getPos().getX();
  int yCoord=getPos().getY();
  int zCoord=getPos().getZ();
  int sx=srcPos.getX();
  int sy=srcPos.getY();
  int sz=srcPos.getZ();
  if (sx >= xCoord - 1 && sx <= xCoord + 1 && sy >= yCoord - 1 && sy <= yCoord + 1 && sz >= zCoord - 1 && sz <= zCoord + 1) {
    return false;
  }
  if (isEmpty(srcState,block)) {
    return false;
  }
  if (block.getBlockHardness(srcState,worldObj,srcPos) >= 0) {
    boolean clear=ShapeCardItem.isClearingQuarry(getCardType());
    if ((!clear) && block == getDirtOrCobble()) {
      return false;
    }
    if (BuilderConfiguration.quarrySkipTileEntities && worldObj.getTileEntity(srcPos) != null) {
      return false;
    }
    FakePlayer fakePlayer=FakePlayerFactory.getMinecraft(DimensionManager.getWorld(0));
    if (block.canEntityDestroy(srcState,worldObj,srcPos,fakePlayer)) {
      if (getCachedVoidableBlocks().contains(block)) {
        clearOrDirtBlock(rfNeeded,sx,sy,sz,block,clear);
      }
 else {
        List<ItemStack> drops;
        if (block.canSilkHarvest(worldObj,srcPos,srcState,fakePlayer)) {
          Item item=Item.getItemFromBlock(block);
          if (item != null) {
            int m=0;
            if (item.getHasSubtypes()) {
              m=block.getMetaFromState(srcState);
            }
            drops=Collections.singletonList(new ItemStack(item,1,m));
          }
 else {
            drops=Collections.emptyList();
          }
          net.minecraftforge.event.ForgeEventFactory.fireBlockHarvesting(drops,worldObj,pos,srcState,0,1.0f,true,fakePlayer);
        }
 else {
          drops=block.getDrops(worldObj,srcPos,srcState,0);
          net.minecraftforge.event.ForgeEventFactory.fireBlockHarvesting(drops,worldObj,pos,srcState,0,1.0f,false,fakePlayer);
        }
        if (checkAndInsertItems(drops)) {
          clearOrDirtBlock(rfNeeded,sx,sy,sz,block,clear);
        }
 else {
          return true;
        }
      }
    }
  }
  return false;
}

Fixed version (ground truth):
private boolean silkQuarryBlock(int rfNeeded,BlockPos srcPos,Block block){
  IBlockState srcState=worldObj.getBlockState(srcPos);
  int xCoord=getPos().getX();
  int yCoord=getPos().getY();
  int zCoord=getPos().getZ();
  int sx=srcPos.getX();
  int sy=srcPos.getY();
  int sz=srcPos.getZ();
  if (sx >= xCoord - 1 && sx <= xCoord + 1 && sy >= yCoord - 1 && sy <= yCoord + 1 && sz >= zCoord - 1 && sz <= zCoord + 1) {
    return false;
  }
  if (isEmpty(srcState,block)) {
    return false;
  }
  if (block.getBlockHardness(srcState,worldObj,srcPos) >= 0) {
    boolean clear=ShapeCardItem.isClearingQuarry(getCardType());
    if ((!clear) && block == getDirtOrCobble()) {
      return false;
    }
    if (BuilderConfiguration.quarrySkipTileEntities && worldObj.getTileEntity(srcPos) != null) {
      return false;
    }
    FakePlayer fakePlayer=FakePlayerFactory.getMinecraft(DimensionManager.getWorld(0));
    if (block.canEntityDestroy(srcState,worldObj,srcPos,fakePlayer)) {
      if (getCachedVoidableBlocks().contains(block)) {
        clearOrDirtBlock(rfNeeded,sx,sy,sz,block,clear);
      }
 else {
        List<ItemStack> drops;
        if (block.canSilkHarvest(worldObj,srcPos,srcState,fakePlayer)) {
          Item item=Item.getItemFromBlock(block);
          drops=new ArrayList<>();
          if (item != null) {
            int m=0;
            if (item.getHasSubtypes()) {
              m=block.getMetaFromState(srcState);
            }
            drops.add(new ItemStack(item,1,m));
          }
          net.minecraftforge.event.ForgeEventFactory.fireBlockHarvesting(drops,worldObj,pos,srcState,0,1.0f,true,fakePlayer);
        }
 else {
          drops=block.getDrops(worldObj,srcPos,srcState,0);
          net.minecraftforge.event.ForgeEventFactory.fireBlockHarvesting(drops,worldObj,pos,srcState,0,1.0f,false,fakePlayer);
        }
        if (checkAndInsertItems(drops)) {
          clearOrDirtBlock(rfNeeded,sx,sy,sz,block,clear);
        }
 else {
          return true;
        }
      }
    }
  }
  return false;
}