Fixed block checking code. Optimized build.rs.

src/blockchain/chain.rs

@@ -754,8 +754,10 @@ impl Chain {
                             Twin
                         };
                     }
+                } else if block.prev_block_hash != last_block.hash {
+                    warn!("Ignoring block with wrong previous hash:\n{:?}", &block);
+                    return Bad;
                 }
-
             }
         }
 

src/p2p/network.rs

@@ -509,7 +509,7 @@ fn process_new_block(context: Arc<Mutex<Context>>, peers: &mut Peers, token: &To
         BlockQuality::Future => { debug!("Ignoring future block {}", block.index); }
         BlockQuality::Bad => {
             // TODO save bad public keys to banned table
-            debug!("Ignoring bad block {} with hash {:?}", block.index, block.hash);
+            debug!("Ignoring bad block {} with hash {:?} from {}", block.index, block.hash, peer.get_addr());
             let height = context.chain.height();
             context.chain.update_max_height(height);
             context.bus.post(crate::event::Event::SyncFinished);