From e54fb96d80973e99d8f60cb403ea1bcd08dab918 Mon Sep 17 00:00:00 2001
From: Dave Collins <davec@conformal.com>
Date: Wed, 2 Oct 2013 10:26:44 -0500
Subject: [PATCH] Test tx lookup validity in CheckInputTransactions.

This commit modifies CheckInputTransactions to ensure that not only must a
transaction exist in the transaction store, it must also not have any
errors associated with it or be nil.
---
 validate.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/validate.go b/validate.go
index ebe563263..b1e9a354d 100644
--- a/validate.go
+++ b/validate.go
@@ -604,7 +604,7 @@ func CheckTransactionInputs(tx *btcwire.MsgTx, txHeight int64, txStore TxStore)
 		// Ensure the input is available.
 		txInHash := &txIn.PreviousOutpoint.Hash
 		originTx, exists := txStore[*txInHash]
-		if !exists {
+		if !exists || originTx.Err != nil || originTx.Tx == nil {
 			str := fmt.Sprintf("unable to find input transaction "+
 				"%v for transaction %v", txInHash, txHash)
 			return 0, RuleError(str)