From 048eb01300dafd8790eee7e0ec7d939daa54361f Mon Sep 17 00:00:00 2001
From: ThomasV <thomasv@electrum.org>
Date: Thu, 28 Feb 2019 10:04:44 +0100
Subject: [PATCH] fix json_db list

---
 electrum/json_db.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/electrum/json_db.py b/electrum/json_db.py
index 9048591f0..4c2237ac3 100644
--- a/electrum/json_db.py
+++ b/electrum/json_db.py
@@ -600,7 +600,7 @@ class JsonDB(PrintError):
                     d[addr] = set([tuple(x) for x in lst])
 
         # remove unreferenced tx
-        for tx_hash in self.transactions:
+        for tx_hash in list(self.transactions.keys()):
             if not self.get_txi(tx_hash) and not self.get_txo(tx_hash):
                 self.print_error("removing unreferenced tx", tx_hash)
                 self.transactions.pop(tx_hash)