From f50af8e10ea7061ec76e55b5173a3099f01a42d5 Mon Sep 17 00:00:00 2001
From: Gav Wood <i@gavwood.com>
Date: Thu, 28 Aug 2014 22:15:59 +0200
Subject: [PATCH] Queue diagnostics.

---
 libethereum/BlockQueue.cpp | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/libethereum/BlockQueue.cpp b/libethereum/BlockQueue.cpp
index 3f636b102..110137537 100644
--- a/libethereum/BlockQueue.cpp
+++ b/libethereum/BlockQueue.cpp
@@ -33,11 +33,16 @@ bool BlockQueue::import(bytesConstRef _block, BlockChain const& _bc)
 	// Check if we already know this block.
 	h256 h = sha3(_block);
 
+	cnote << "Queuing block" << h.abridged() << "for import...";
+
 	UpgradableGuard l(m_lock);
 
 	if (m_readySet.count(h) || m_drainingSet.count(h) || m_futureSet.count(h))
+	{
 		// Already know about this one.
+		cnote << "Already known.";
 		return false;
+	}
 
 	// VERIFY: populates from the block and checks the block is internally coherent.
 	BlockInfo bi;
@@ -60,11 +65,17 @@ bool BlockQueue::import(bytesConstRef _block, BlockChain const& _bc)
 
 	// Check block doesn't already exist first!
 	if (_bc.details(newHash))
+	{
+		cnote << "Already known in chain.";
 		return false;
+	}
 
 	// Check it's not crazy
 	if (bi.timestamp > (u256)time(0))
+	{
+		cnote << "Invalid timestamp.";
 		return false;
+	}
 
 	{
 		UpgradeGuard ul(l);
@@ -73,12 +84,14 @@ bool BlockQueue::import(bytesConstRef _block, BlockChain const& _bc)
 		if (!m_readySet.count(bi.parentHash) && !m_drainingSet.count(bi.parentHash) && !_bc.details(bi.parentHash))
 		{
 			// We don't know the parent (yet) - queue it up for later. It'll get resent to us if we find out about its ancestry later on.
+			cnote << "OK - queued for future.";
 			m_future.insert(make_pair(bi.parentHash, make_pair(h, _block.toBytes())));
 			m_futureSet.insert(h);
 		}
 		else
 		{
 			// If valid, append to blocks.
+			cnote << "OK - ready for chain insertion.";
 			m_ready.push_back(_block.toBytes());
 			m_readySet.insert(h);