Program: 178703
Project: 178703
Buggy source:
@EventHandler() public void onBlockBreak(BlockBreakEvent event){
  Block block=event.getBlock();
  V10Location loc=new V10Location(block);
  if (plugin.config.DisabledWorlds.contains(loc.world))   return;
  BlockHolder bh=new BlockHolder(block);
  if (plugin.gelManager.gelMap.containsKey(bh)) {
    plugin.gelManager.gelMap.remove(bh);
    for (    ArrayList<BlockHolder> blocks : plugin.gelManager.gels.values())     blocks.remove(bh);
  }
  plugin.funnelBridgeManager.updateBridge(loc);
  Portal portal=null;
  if (plugin.portalManager.borderBlocks.containsKey(loc))   portal=plugin.portalManager.borderBlocks.get(loc);
 else   if (plugin.portalManager.behindBlocks.containsKey(loc))   portal=plugin.portalManager.behindBlocks.get(loc);
 else   if (plugin.portalManager.insideBlocks.containsKey(loc)) {
    portal=plugin.portalManager.insideBlocks.get(loc);
    if (portal.transmitter && block.getType() == Material.REDSTONE_TORCH_ON) {
      event.setCancelled(true);
      fakeBBE=false;
      return;
    }
    if (portal.open)     return;
  }
  if (portal != null) {
    portal.delete();
    event.setCancelled(true);
    return;
  }
  if (plugin.grillManager.insideBlocks.containsKey(loc) || plugin.funnelBridgeManager.bridgeBlocks.containsKey(loc)) {
    event.setCancelled(true);
    fakeBBE=false;
    return;
  }
  if (plugin.funnelBridgeManager.bridgeMachineBlocks.containsKey(loc)) {
    if (event.getPlayer() == null || plugin.hasPermission(event.getPlayer(),plugin.PERM_DELETE_BRIDGE))     plugin.funnelBridgeManager.bridgeMachineBlocks.get(loc).delete();
 else {
      event.setCancelled(true);
      fakeBBE=false;
    }
    return;
  }
  if (plugin.grillManager.borderBlocks.containsKey(loc)) {
    if (event.getPlayer() == null || plugin.hasPermission(event.getPlayer(),plugin.PERM_DELETE_GRILL))     plugin.grillManager.borderBlocks.get(loc).delete();
 else {
      event.setCancelled(true);
      fakeBBE=false;
    }
    return;
  }
  Material type=block.getType();
  Region region=plugin.regionManager.getRegion(loc);
  if (type == Material.REDSTONE_WIRE && region.getBoolean(RegionSetting.ENABLE_REDSTONE_TRANSFER)) {
    Location l=block.getLocation();
    for (int i=0; i < 4; i++) {
      BlockFace face=BlockFace.values()[i];
      loc=new V10Location(new Location(l.getWorld(),l.getX() + face.getModX(),l.getY() + face.getModY(),l.getZ() + face.getModZ()));
      if (plugin.portalManager.insideBlocks.containsKey(loc)) {
        portal=plugin.portalManager.insideBlocks.get(loc);
        if (!portal.open)         continue;
        Portal destination=portal.getDestination();
        if (destination == null || destination.transmitter)         continue;
        for (        V10Location b : destination.inside)         if (b != null)         b.getHandle().getBlock().setType(Material.AIR);
        portal.transmitter=false;
      }
    }
  }
}

Fixed version (ground truth):
@EventHandler() public void onBlockBreak(BlockBreakEvent event){
  Block block=event.getBlock();
  V10Location loc=new V10Location(block);
  if (plugin.config.DisabledWorlds.contains(loc.world))   return;
  BlockHolder bh=new BlockHolder(block);
  if (plugin.gelManager.gelMap.containsKey(bh))   plugin.gelManager.removeGel(bh);
  plugin.funnelBridgeManager.updateBridge(loc);
  Portal portal=null;
  if (plugin.portalManager.borderBlocks.containsKey(loc))   portal=plugin.portalManager.borderBlocks.get(loc);
 else   if (plugin.portalManager.behindBlocks.containsKey(loc))   portal=plugin.portalManager.behindBlocks.get(loc);
 else   if (plugin.portalManager.insideBlocks.containsKey(loc)) {
    portal=plugin.portalManager.insideBlocks.get(loc);
    if (portal.transmitter && block.getType() == Material.REDSTONE_TORCH_ON) {
      event.setCancelled(true);
      fakeBBE=false;
      return;
    }
    if (portal.open)     return;
  }
  if (portal != null) {
    portal.delete();
    event.setCancelled(true);
    return;
  }
  if (plugin.grillManager.insideBlocks.containsKey(loc) || plugin.funnelBridgeManager.bridgeBlocks.containsKey(loc)) {
    event.setCancelled(true);
    fakeBBE=false;
    return;
  }
  if (plugin.funnelBridgeManager.bridgeMachineBlocks.containsKey(loc)) {
    if (event.getPlayer() == null || plugin.hasPermission(event.getPlayer(),plugin.PERM_DELETE_BRIDGE))     plugin.funnelBridgeManager.bridgeMachineBlocks.get(loc).delete();
 else {
      event.setCancelled(true);
      fakeBBE=false;
    }
    return;
  }
  if (plugin.grillManager.borderBlocks.containsKey(loc)) {
    if (event.getPlayer() == null || plugin.hasPermission(event.getPlayer(),plugin.PERM_DELETE_GRILL))     plugin.grillManager.borderBlocks.get(loc).delete();
 else {
      event.setCancelled(true);
      fakeBBE=false;
    }
    return;
  }
  Material type=block.getType();
  Region region=plugin.regionManager.getRegion(loc);
  if (type == Material.REDSTONE_WIRE && region.getBoolean(RegionSetting.ENABLE_REDSTONE_TRANSFER)) {
    Location l=block.getLocation();
    for (int i=0; i < 4; i++) {
      BlockFace face=BlockFace.values()[i];
      loc=new V10Location(new Location(l.getWorld(),l.getX() + face.getModX(),l.getY() + face.getModY(),l.getZ() + face.getModZ()));
      if (plugin.portalManager.insideBlocks.containsKey(loc)) {
        portal=plugin.portalManager.insideBlocks.get(loc);
        if (!portal.open)         continue;
        Portal destination=portal.getDestination();
        if (destination == null || destination.transmitter)         continue;
        for (        V10Location b : destination.inside)         if (b != null)         b.getHandle().getBlock().setType(Material.AIR);
        portal.transmitter=false;
      }
    }
  }
}