Program: 156532
Project: 156532
Buggy source:
public static void start(){
  Iterator i=Block.blockRegistry.iterator();
  while (i.hasNext()) {
    Block block=(Block)i.next();
    if (block == null || block == Blocks.air) {
      continue;
    }
    for (int meta=0; meta < 16; meta++) {
      if (!SchematicRegistry.INSTANCE.isSupported(block,meta)) {
        try {
          if (block.hasTileEntity(meta)) {
            SchematicRegistry.INSTANCE.registerSchematicBlock(block,meta,SchematicTileCreative.class);
            continue;
          }
          try {
            if (block instanceof IFluidBlock) {
              IFluidBlock fblock=(IFluidBlock)block;
              if (fblock.getFluid() != null) {
                SchematicRegistry.INSTANCE.registerSchematicBlock(block,meta,SchematicFluid.class,new FluidStack(fblock.getFluid(),1000));
              }
            }
 else {
              if (block instanceof BlockBush || block instanceof IPlantable || block instanceof IGrowable) {
                SchematicRegistry.INSTANCE.registerSchematicBlock(block,meta,SchematicBlockFloored.class);
              }
 else {
                SchematicRegistry.INSTANCE.registerSchematicBlock(block,meta,SchematicBlock.class);
              }
            }
          }
 catch (          Exception e) {
            e.printStackTrace();
          }
        }
 catch (        Exception e) {
        }
      }
    }
  }
}

Fixed version (ground truth):
public static void start(){
  Iterator i=Block.blockRegistry.iterator();
  while (i.hasNext()) {
    Block block=(Block)i.next();
    if (block == null || block == Blocks.air) {
      continue;
    }
    for (int meta=0; meta < 16; meta++) {
      if (!SchematicRegistry.INSTANCE.isSupported(block,meta)) {
        try {
          if (block.hasTileEntity(meta)) {
            SchematicRegistry.INSTANCE.registerSchematicBlock(block,meta,SchematicTileCreative.class);
            continue;
          }
          try {
            if (block instanceof IFluidBlock) {
              IFluidBlock fblock=(IFluidBlock)block;
              if (fblock.getFluid() != null) {
                SchematicRegistry.INSTANCE.registerSchematicBlock(block,meta,SchematicFluid.class,new FluidStack(fblock.getFluid(),1000));
              }
            }
 else {
              if (block instanceof BlockBush || block instanceof IPlantable || block instanceof IGrowable|| block instanceof BlockBasePressurePlate) {
                SchematicRegistry.INSTANCE.registerSchematicBlock(block,meta,SchematicBlockFloored.class);
              }
 else               if (block instanceof BlockLever || block instanceof BlockTorch || block instanceof BlockButton) {
                SchematicRegistry.INSTANCE.registerSchematicBlock(block,meta,SchematicWallSide.class);
              }
 else               if (block instanceof BlockStairs) {
                SchematicRegistry.INSTANCE.registerSchematicBlock(block,meta,SchematicStairs.class);
              }
 else {
                SchematicRegistry.INSTANCE.registerSchematicBlock(block,meta,SchematicBlock.class);
              }
            }
          }
 catch (          Exception e) {
            e.printStackTrace();
          }
        }
 catch (        Exception e) {
        }
      }
    }
  }
}