Better diagnostics.

Mining bug fix.

libethereum/BlockChain.cpp

@@ -124,15 +124,15 @@ void BlockChain::import(bytes const& _block, Overlay const& _db)
 
 	auto newHash = eth::sha3(_block);
 
+	clog(BlockChainChat) << "Attempting import of " << newHash << "...";
+
 	// Check block doesn't already exist first!
 	if (details(newHash))
 	{
-		clog(BlockChainNote) << "   Not new.";
+		clog(BlockChainChat) << "   Not new.";
 		throw AlreadyHaveBlock();
 	}
 
-	clog(BlockChainNote) << "Attempting import of " << newHash << "...";
-
 	// Work out its number as the parent's number + 1
 	auto pd = details(bi.parentHash);
 	if (!pd)

libethereum/BlockChain.h

@@ -55,8 +55,9 @@ class Overlay;
 class AlreadyHaveBlock: public std::exception {};
 class UnknownParent: public std::exception {};
 
-struct BlockChainNote: public LogChannel { static const char constexpr* name = "-B-"; };
-struct BlockChainWarn: public LogChannel { static const char constexpr* name = "!B!"; };
+struct BlockChainChat: public LogChannel { static const char constexpr* name = "-B-"; static const int verbosity = 7; };
+struct BlockChainNote: public LogChannel { static const char constexpr* name = "=B="; static const int verbosity = 1; };
+struct BlockChainWarn: public LogChannel { static const char constexpr* name = "!B!"; static const int verbosity = 0; };
 
 /**
  * @brief Implements the blockchain database. All data this gives is disk-backed.

libethereum/Client.cpp

@@ -169,6 +169,7 @@ void Client::work()
 			m_mineProgress.best = 0;
 			m_lock.unlock();
 			m_changed = true;
+			m_miningStarted = false;	// need to re-commit to mine.
 		}
 	}
 	else