Program: 95594
Project: 95594
Buggy source:
/** 
 * Checks if a multiblock may be formed, and forms it if possible. <p> TODO: Decrease number of loops. </p>
 * @return If a multiblock was formed.
 */
public final boolean formMultiBlock(){
  if (this.worldObj.isRemote) {
    return false;
  }
  final int xPosNew=findEnd(ForgeDirection.WEST);
  final int yPosNew=findEnd(ForgeDirection.DOWN);
  final int zPosNew=findEnd(ForgeDirection.NORTH);
  final int xSizeNew=xPosNew + findEnd(ForgeDirection.EAST) + 1;
  final int ySizeNew=yPosNew + findEnd(ForgeDirection.UP) + 1;
  final int zSizeNew=zPosNew + findEnd(ForgeDirection.SOUTH) + 1;
  final int anchorXNew=this.xCoord - xPosNew;
  final int anchorYNew=this.yCoord - yPosNew;
  final int anchorZNew=this.zCoord - zPosNew;
  if (xSizeNew == 1 && ySizeNew == 1 && zSizeNew == 1) {
    return false;
  }
  for (int x=0; x < xSizeNew; x++) {
    for (int y=0; y < ySizeNew; y++) {
      for (int z=0; z < zSizeNew; z++) {
        if (!this.canJoinMultiBlock(this.worldObj.getTileEntity(anchorXNew + x,anchorYNew + y,anchorZNew + z))) {
          return false;
        }
      }
    }
  }
  for (int x=0; x < xSizeNew; x++) {
    for (int y=0; y < ySizeNew; y++) {
      for (int z=0; z < zSizeNew; z++) {
        TileEntity te=this.worldObj.getTileEntity(anchorXNew + x,anchorYNew + y,anchorZNew + z);
        if (te instanceof TileEntityMultiBlock) {
          TileEntityMultiBlock block=((TileEntityMultiBlock)te);
          block.breakupMultiBlock();
          block.component=new MultiBlockComponent(anchorXNew,anchorYNew,anchorZNew,x,y,z,xSizeNew,ySizeNew,zSizeNew);
          block.addBlock();
          block.markForUpdate();
        }
 else {
          LogHelper.debug("String_Node_Str");
        }
      }
    }
  }
  return true;
}

Fixed version (ground truth):
/** 
 * Checks if a multiblock may be formed, and forms it if possible. <p> TODO: Decrease number of loops. </p>
 * @return If a multiblock was formed.
 */
public final boolean formMultiBlock(){
  if (this.worldObj.isRemote) {
    return false;
  }
  final int xPosNew=findEnd(ForgeDirection.WEST);
  final int yPosNew=findEnd(ForgeDirection.DOWN);
  final int zPosNew=findEnd(ForgeDirection.NORTH);
  final int xSizeNew=xPosNew + findEnd(ForgeDirection.EAST) + 1;
  final int ySizeNew=yPosNew + findEnd(ForgeDirection.UP) + 1;
  final int zSizeNew=zPosNew + findEnd(ForgeDirection.SOUTH) + 1;
  final int anchorXNew=this.xCoord - xPosNew;
  final int anchorYNew=this.yCoord - yPosNew;
  final int anchorZNew=this.zCoord - zPosNew;
  if (xSizeNew == 1 && ySizeNew == 1 && zSizeNew == 1) {
    return false;
  }
  for (int x=0; x < xSizeNew; x++) {
    for (int y=0; y < ySizeNew; y++) {
      for (int z=0; z < zSizeNew; z++) {
        if (!this.canJoinMultiBlock(this.worldObj.getTileEntity(anchorXNew + x,anchorYNew + y,anchorZNew + z))) {
          return false;
        }
      }
    }
  }
  for (int x=0; x < xSizeNew; x++) {
    for (int y=0; y < ySizeNew; y++) {
      for (int z=0; z < zSizeNew; z++) {
        TileEntity te=this.worldObj.getTileEntity(anchorXNew + x,anchorYNew + y,anchorZNew + z);
        if (te instanceof TileEntityMultiBlock) {
          TileEntityMultiBlock teMB=((TileEntityMultiBlock)te);
          teMB.breakupMultiBlock();
          teMB.component=new MultiBlockComponent(anchorXNew,anchorYNew,anchorZNew,x,y,z,xSizeNew,ySizeNew,zSizeNew);
          teMB.addBlock();
          teMB.markForUpdate();
        }
 else {
          LogHelper.debug("String_Node_Str");
        }
      }
    }
  }
  return true;
}