No need to commit to disk after successful mine - this will happen

during blockchain import anyway.

libethereum/Client.cpp

@@ -289,14 +289,6 @@ void Client::connect(std::string const& _seedHost, unsigned short _port)
 	m_net->connect(_seedHost, _port);
 }
 
-void Client::onComplete(State& _s)
-{
-	// Must lock stateDB here since we're actually pushing out to the database.
-	WriteGuard l(x_stateDB);
-	cwork << "COMPLETE MINE";
-	_s.completeMine();
-}
-
 void Client::setupState(State& _s)
 {
 	{
@@ -320,6 +312,14 @@ void Client::setupState(State& _s)
 		_s.commitToMine(m_bc);
 }
 
+void Client::onComplete(State& _s)
+{
+	// Must lock stateDB here since we're actually pushing out to the database.
+	WriteGuard l(x_stateDB);
+	cwork << "COMPLETE MINE";
+	_s.completeMine();
+}
+
 void Client::transact(Secret _secret, u256 _value, Address _dest, bytes const& _data, u256 _gas, u256 _gasPrice)
 {
 	ensureWorking();
@@ -423,7 +423,7 @@ void Client::work()
 		cwork << "CHAIN <== postSTATE";
 		h256s hs;
 		{
-			ReadGuard l(x_stateDB);
+			WriteGuard l(x_stateDB);
 			hs = m_bc.attemptImport(m_miner.state().blockData(), m_stateDB);
 		}
 		if (hs.size())

libethereum/State.cpp

@@ -767,9 +767,6 @@ void State::completeMine()
 	cdebug << "Completing mine!";
 	// Got it!
 
-	// Commit to disk.
-	m_db.commit();
-
 	// Compile block:
 	RLPStream ret;
 	ret.appendList(3);